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    Wyświetlanie 1-29 z 29
    Tytuł:
    Process of continuous production of oligoaminosaccharides in a column reactor
    Autorzy:
    Struszczyk, Katarzyna
    Szczęsna- Antczak, Mirosława
    Pomianowska, Emilia
    Stańczyk, Łukasz
    Wojciechowska, Justyna
    Antczak, Tadeusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1035558.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    Mucor
    chitooligosaccharides
    chitosan
    chitosanolytic enzymes
    continuous process.
    low-molecular weight chitosan
    Opis:
    A continuous production of oligoaminosaccharides from chitosan was achieved with a column reactor packed with chitosanolytic enzymes-containing mycelia of Mucor circinelloides and Mucor racemosus immobilized in porous carriers. The efficient work of the bed used for chitosan hydrolysis in a column reactor lasted for several or more than 10 days and depended on a type of a carrier and substrate concentration. Because a crucial parameter for large scale applications of enzymes is their operating stability, presented research intended to improve it through stabilization of proteins and elimination of their leakage from the carrier. Cross-linking of mycelial preparations of chitosanolytic enzymes with 1% glutaraldehyde did not increase their stability and further process optimization is necessary.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 177-188
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Agents modeling experience applied to control of semi-continuous production process
    Autorzy:
    Rojek, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/305558.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    agent technology
    industrial control
    case-based reasoning
    Opis:
    The lack of proper analytical models of some production processes prevents us from obtaining proper values of process parameters by simply computing optimal values. Possible solutions of control problems in such areas of industrial processes can be found using certain methods from the domain of artificial intelligence: neural networks, fuzzy logic, expert systems, or evolutionary algorithms. Presented in this work, a solution to such a control problem is an alternative approach that combines control of the industrial process with learning based on production results. By formulating the main assumptions of the proposed methodology, decision processes of a human operator using his experience are taken into consideration. The researched model of using and gathering experience of human beings is designed with the contribution of agent technology. The presented solution of the control problem coincides with case-based reasoning (CBR) methodology.
    Źródło:
    Computer Science; 2014, 15 (4); 411-439
    1508-2806
    2300-7036
    Pojawia się w:
    Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resource efficiency within semi-continuous production: an approach to assess process-inherent resource dissipation
    Autorzy:
    Meier, H.
    Bakir, D.
    Krückhans, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/407284.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    resource efficiency enhancement
    resource assessment approach
    eco accounting
    lean manufacturing
    manufacturing systems
    Opis:
    Within classic German manufacturing structures, costs of resources exceed all other cost factors by 46% [1]. Solitary focus on energy or labor costs as sources to raise companies profit no longer seems adequate. Nowadays material costs of the manufacturing industry are about 500 billion euro per year, connected with a saving potential of 100 billion euro per year. Also the belonging for sustainably produced products is raising and becoming a factor for guaranteed purchases [2]. A small and medium-sized enterprise fitted approach, which ensures to increase the transparency of internal process structures and allows a resource driven, ecological and economical assessment, is the main subject of this article.
    Źródło:
    Management and Production Engineering Review; 2013, 4, 4; 45-49
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review on hierarchically microstructured monolithic reactors for high yield continuous production of fine chemicals
    Autorzy:
    Mrowiec-Białoń, J.
    Ciemięga, A.
    Maresz, K.
    Szymańska, K.
    Pudło, W.
    Jarzębski, A. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/184990.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microreactors
    in-flow synthesis
    process intensification
    nanostructured materials
    mikroreaktory
    synteza wewnątrzpłynna
    intensyfikacja procesu
    materiały nanostrukturalne
    Opis:
    Preparation and properties of hierarchically structured porous silica monoliths have been discussed from the viewpoint of their application as continuous microreactors for liquid-phase synthesis of fine chemical in multi kilogram scales. The results of recent topical papers published by two research teams of Institute of Chemical Engineering Polish Academy of Sciences (ICE) and Department of Chemical Engineering and Process Design, Chemical Faculty, Silesian University of Technology (SUT) have been analyzed to specify the governing traits of microreactors. It was concluded that even enhancement factor of 100 in activity, seen in enzyme catalyzed reactions, can be explained by a proportional reduction of its physical constraints, i.e. huge enhancement of external mass transfer and micromixing. It is induced by very chaotic flows of liquid in tens of thousands of waving connected channels of ca. 25–50 mm in diameter, present in the skeleton. The scale of enhancement in the caseof less active catalysts was smaller, but still large enough to consider the most practical applications.
    Źródło:
    Chemical and Process Engineering; 2018, 39, 4; 367--375
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lactobacillus casei cell immobilisation on mineral carriers for continuous lactic acid production
    Autorzy:
    Kowalska, Urszula
    Mizielińska, Małgorzata
    Łopusiewicz, Łukasz
    Bartkowiak, Artur
    Powiązania:
    https://bibliotekanauki.pl/articles/1178777.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Lactobacillus casei
    adsorption
    biofilm
    continuous production
    immobilisation
    lactic acid
    mineral carriers
    Opis:
    The first purpose of the study was to evaluate the influence of incubation parameters for efficiency of bacterial adhesion on surface of three solid, mineral porous carriers. Second aim of the study was the use of the immobilized Lactobacillus casei cells, in the production of lactic acid and selection, best carriers for continuous production using column bioreactor. The results showed that bacterial adhesion was different depending on the incubation conditions. In all tested samples, the highest efficiency of bacterial adhesion achieved after incubation at 30 °C without shaking which was related to bacterial viability. The results showed that, the highest efficiency of lactic acid production by free cells has been obtained at 30 °C after 48h – 110% (w/w) (lactic acid yield from consumed glucose). This results have been confirmed by further tests which have shown that in stationary culture, the highest production of lactic acid was reached by immobilised bacteria cells on pumice and kermiste after 48 hours at 30 °C.
    Źródło:
    World Scientific News; 2017, 90; 62-76
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Normowe pojęcie rodzina betonów na przykładzie ciągłej produkcji płyt Spiroll
    Standard term concrete families on the example of continuous production of Spiroll slabs
    Autorzy:
    Jasiczak, J.
    Kanoniczak, M.
    Smaga, Ł
    Powiązania:
    https://bibliotekanauki.pl/articles/390196.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
    Tematy:
    rodzina betonów
    wytrzymałość betonu na ściskanie
    płyty Spiroll
    kontrola produkcji mieszanki betonowej
    family of concretes
    compressive strength of concrete
    Spiroll slabs
    control of concrete mix production
    Opis:
    W artykule przedstawiono podział na rodziny betonów ciągu wyników badan wytrzymałości betonu na ściskanie przy ciągłej produkcji mieszanki betonowej na potrzeby wytwarzania prefabrykowanych płyt stropowych w technologii Spiroll. W oparciu o procedurę obliczeniową, polegającą na weryfikacji założonych hipotez statystycznych, dokonano rozdziału zbioru wyników reprezentującego wytrzymałość po 1 oraz po 28 dniach dojrzewania. Uzyskano rodziny betonów reprezentujące statystyczną niezmienność parametrów wytrzymałościowych betonu wyprodukowanego w określonym przedziale czasu.
    The article presents the division of test results series for the compressive strength of concrete into concrete families for the continuous production of concrete mix used for the manufacture of precast concrete slabs in Spiroll technology. On the basis of a calculation procedure involving the verification of assumed statistical hypotheses, the division of a set of concrete strength results achieved after 1 and 28 days of curing was made. Concrete families were obtained representing the statistical invariability of strength parameters for the concrete manufactured in a defined period of time.
    Źródło:
    Budownictwo i Architektura; 2014, 13, 2; 99-108
    1899-0665
    Pojawia się w:
    Budownictwo i Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Integration of discontinuous milling operations into the flow production of sheet metal profiles
    Autorzy:
    Schmidt, S.
    Abele, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/99711.pdf
    Data publikacji:
    2014
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    milling
    HSC
    continuous flow production
    Opis:
    This paper is about the integration of discontinuous milling operations into the continuous flow production line of branched sheet metal profiles in an integral design. A major challenge is the non-existing possibility to clamp the work piece due to its constant feed. The machining on the fly itself is only possible through synchronizing the movement of the machine tools axes with the continuous feed of the sheet metal profile.
    Źródło:
    Journal of Machine Engineering; 2014, 14, 4; 95-102
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the modernized production system through selected TPM method indicators
    Autorzy:
    Michlowicz, Edward
    Powiązania:
    https://bibliotekanauki.pl/articles/2200930.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    continuous production system
    system modernization
    post-modernization evaluation
    evaluation indices
    OEE
    MTTR
    MTBF
    process monitoring
    Opis:
    The subject of the studies is the evaluation of the operation of a production system after modernization. The analysed case concerns the modernization forced by the end of the product lifetime. The proposed methodology is that of a multicriterial evaluation of the system operation after modernization. The evaluation criteria are selected TPM indices: availability of machinery and equipment, production process capacity, product quality and overall equipment effectiveness (OEE). The additional criteria are reliability indices MTBF and MTTR of studied production lines and the MTTR of the most unreliable equipment in each analysed line. A yearly monitoring of production process was proposed for obtaining the statistical credibility of the evaluation results. Additionally, a fuzzy indicator of acceptability of the modernization assessment was proposed. The paper presents the results of studies of the system for production of zinc concentrate from post-production waste. The obtained values of OEE, MTBF and MTTR indicators for the three tested lines make it possible to state that the modernization carried out is acceptable.
    Źródło:
    Eksploatacja i Niezawodność; 2022, 24, 4; 677--686
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuous liquid interface production (CLIP) method for rapid prototyping
    Autorzy:
    Düzgün, D. E.
    Nadolny, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/95197.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    rapid prototyping
    additive manufacturing
    continuous liquid
    3D printing
    Continuous Liquid Interface Production
    CLIP
    szybkie prototypowanie
    wytwarzanie addytywne
    produkcja dodatkowa
    drukowanie 3D
    drukowanie przestrzenne
    Opis:
    Additive Manufacturing (AM) processes such as three- dimensional (3D) printing are one of most important technologies of our century. Additive manufacturing is a manufacturing process in which 3D solid objects are created. It enables the creation of physical 3D models of objects using a series of an additive or layered development framework, where layers are laid down in succession to create a complete 3D object. Additive manufacturing is also known as 3D printing. The strongest reasons for the use of rapid prototypes in manufacturing are the production of parts with a small quantity or a complex shape, the obtaining of lighter parts, the prevention of waste of raw materials, a wider availability of testing and design and further personalization. Continuous liquid interface production (CLIP) is an alternative approach to AM by exploiting the basic principle of oxygen-impaired photopolymerization to create a continuous fluid interface of uncured resin between the growing section and the exposure window.
    Źródło:
    Journal of Mechanical and Energy Engineering; 2018, 2, 1; 5-12
    2544-0780
    2544-1671
    Pojawia się w:
    Journal of Mechanical and Energy Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies in the continuous production of cheese by forced milk coagulation in through-flow II. Appraisal of cheese maturation
    Studia nad ciągłym wyrobem sera opartym na wymuszonej koagulacji mleka w przepływie. II. Ocena dojrzewania sera
    Autorzy:
    Smietana, Z.
    Poznanski, S.
    Rymaszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/10693.pdf
    Data publikacji:
    1975
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Opis:
    Sery wyprodukowane metodą ciągłą wykazały ten sam stopień rozkładu białka i hydrolizy tłuszczu jak sery wyprodukowane metodą klasyczną. Dzięki użyciu prostego urządzenia za pomocą opisanej procedury można było otrzymać różne rodzaje serów. Ich charakterystyka smakowa była całkowicie poprawna i sery te okazały się niegorsze od wyprodukowanych metodą klasyczną.
    Źródło:
    Acta Alimentaria Polonica; 1975, 01, 3-4
    0137-1495
    Pojawia się w:
    Acta Alimentaria Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorithm of the implementation of continuous flow in unbalanced production unit condition – case study
    Autorzy:
    Hadaś, Ł.
    Karaskiewicz, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/409222.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    material flow
    push
    pull
    Theory of Constraints
    lean management
    balancing production
    algorithm
    Opis:
    This article shows step by step process of creating general algorithm saying how to implement continuous flow in production companies. Article is based on real environment of medium Polish production company, which produces steel halls. After presenting basic information about TOC and LEAN tools it shows and algorithm showing activities and sequence made in real company. Authors proposed solutions referred to both the material flow changing's and the information flow changing's. Main goal was adapt production process to unchangeable work of bottleneck. After all, results of production flow simulation after implementation of above solutions were presented. Finally, authors created algorithm based on techniques and tools implemented in mentioned company. It shows in general what production engineers should do step by step while implementing continuous flow in production.
    Źródło:
    Research in Logistics & Production; 2014, 4, 1; 91-100
    2083-4942
    2083-4950
    Pojawia się w:
    Research in Logistics & Production
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PDCA cycle as a part of continuous improvement in the production company - a case study
    Autorzy:
    Jagusiak-Kocik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/111939.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    continuous improvement
    PDCA cycle
    production
    plastics
    ciągłe doskonalenie
    cykl PDCA
    tworzywa sztuczne
    Opis:
    The paper presents a case study of the practical use of Deming cycle in a manufacturing company, from the plastics processing industry, from the sector of small and medium-sized enterprises. The paper is a study of literature in the field of continuous improvement and characterized by a cycle of continuous improvement, called the Deming cycle, or PDCA cycle. This cycle was used as a solution to quality problems which occurred during production of photo frames: discolorations and scorches on the surface of the frame. When measures were introduced to reduce the number of non-conformities, a decrease by more than 60% was observed.
    Źródło:
    Production Engineering Archives; 2017, 14; 19-22
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prospects for the development of hydrate storage and transportation technology of methane gas
    Autorzy:
    Pavlenko, A.
    Koshlak, H.
    Vytyaz, O.
    Rybicki, Cz.
    Powiązania:
    https://bibliotekanauki.pl/articles/298817.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    gas hydrate
    jet apparatus
    free falling jet
    continuous cycle of production
    coagulation
    heat of gas hydration
    Opis:
    The gas hydrate tecłmologies can be alternative to the traditional methods of the rational use of hydrocarbon gases. However the known constructions of apparatuses for the production of gas hydrates cannot satisfy the condition of their industrial use fully. Authors offer to carry out the high-quality contact of gas and water at formation of gas hydrate by jet apparatuses with a free falling jet. On their basis a technological chart is offered for realization of continuous cycle of production of gas hydrate. The aim is to develop technical solutions and process parameters of continuous production of gas hydrates, which would satisfy the requirements of industrial application
    Źródło:
    AGH Drilling, Oil, Gas; 2015, 32, 1; 13-21
    2299-4157
    2300-7052
    Pojawia się w:
    AGH Drilling, Oil, Gas
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new method for continuous cheese production by forced milk coagulation in through-flow. I. Characteristics of method
    Nowa metoda produkcji sera sposobem ciągłym oparta na wymuszonej koagulacji mleka w przepływie. Cz. I. Charakterystyka metody
    Autorzy:
    Smietana, Z.
    Poznanski, S.
    Rymaszewski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/10225.pdf
    Data publikacji:
    1975
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Opis:
    Opisano nową metodę ciągłej produkcji sera zasadzającą się na wymuszonej koagulacji mleka w przepływie w trakcie enzymatycznej fazy działania podpuszczką. Skonstruowano urządzenie za pomocą którego wykonano pewną liczbę prób, posługując się opracowaną metodą. Scharakteryzowano przebieg procesu technologicznego. Wyniki wykazują, że w przytoczony sposób można otrzymać sery o zadowalającej zawartości wody, laktozy, kwasu mlekowego oraz soli mineralnych. Najważniejsze parametry technologiczne, np. liczba dodanych jonów wapnia, temperatura koagulacji i pH mleka przedstawiono graficznie i matematycznie. Parametry te można praktycznie wykorzystać w ciągłym procesie produkcji serów.
    Źródło:
    Acta Alimentaria Polonica; 1975, 01, 1
    0137-1495
    Pojawia się w:
    Acta Alimentaria Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Koncepcja metodyki ciągłego doskonalenia procesu jakościowego przygotowania procesu produkcyjnego
    Methodology concept of continuous improvement of quality process in preparing production process
    Autorzy:
    Tokaj, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/339885.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Zarządzania Produkcją
    Tematy:
    PDCA
    continuous improvement
    PPAP
    PPF
    zarządzanie produkcją
    rozwój
    proces przygotowania produkcji
    Opis:
    Each organization in order to survive and develop (in a constantly changing business environment) must be constantly perfected. These activities are long-term and comprehensive efforts to continuously improve processes and solve problems. One of the important processes of production company is the process of preparing production for its serial run. The article presents the concept of continuous improvement methods of the production preparation process carried out on the basis of the processes PPAP and PPF, using the Deming PDCA cycle.
    Źródło:
    Zarządzanie Przedsiębiorstwem; 2015, 18, 3; 16-21
    1643-4773
    Pojawia się w:
    Zarządzanie Przedsiębiorstwem
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organizacja przepływu ciągłego w procesie produkcyjnym z uwzględnieniem zmienności zapotrzebowania na wyroby
    Organization of continuous flow in the process of production with regard to variability demand for products
    Autorzy:
    Żywicki, K.
    Rewers, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/340126.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Zarządzania Produkcją
    Tematy:
    continuous flow
    division of labor
    production process
    przepływ ciągły
    podział pracy
    proces produkcji
    Opis:
    The article presents the project organization in the continuous flow water meter corps assembly process. On the basis of observations in the company analyzes were performed: the production process in the seating assembly, the scope of work of each operator, spatial development workplaces and how to supplying the materials. When developing new rules for the organization of the production flow the characteristics of the demand for products, which is one of the factors affecting the distribution of work between the operators, was taken into account. It shows the benefits of the continuous flow by eliminating waste, changing the method of division of labor carried out by the operators, and the spatial development of the seating. The result is to reduced the transit time of the material in process, reduced work-in-progress inventory and increasing flexibility in the customer's needs.
    Źródło:
    Zarządzanie Przedsiębiorstwem; 2015, 18, 1; 39-47
    1643-4773
    Pojawia się w:
    Zarządzanie Przedsiębiorstwem
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Flow-oriented Production Cell in Conditions of Low Technological-Organizational Similarity
    Autorzy:
    Pawlak, Natalia
    Hadas, Lukasz
    Fertsch, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2201165.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lean management
    production line balancing
    cellular manufacturing
    continuous flow
    layout
    Opis:
    This paper presents the concept and methodology for the designing of a “tree-shaped” production line. The concept is a result of the search for production unit organization that meets the Lean Production assumptions, i.e. focusing on lead time (throughput time) shortening with simultaneous ability of use in conditions of varied product range. The varied product range characterized by lower technological-organizational similarity when compared to “Ushaped” units typical for Lean Production. The paper presents an algorithm for the designing of a “tree-shaped” production line and examples of its application. The designed unit underwent evaluation according to the criteria preferred by Lean Manufacturing experts. The designed production unit achieved results confirming the effectiveness of the proposed concept for the analysed sets of input data on the product range and production capacities.
    Źródło:
    Management and Production Engineering Review; 2022, 13, 4; 126--136
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Semi-Continuous Anaerobic Digestion of Water Hyacinth with Different Volatile Solid Levels for Biogas Production – A Mesocosm Experiment
    Autorzy:
    Thuan, Nguyen Cong
    Khanh, Huynh Cong
    Powiązania:
    https://bibliotekanauki.pl/articles/2202361.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    renewable energy
    semi-continuous anaerobic digestion
    volatile solid
    water hyacinth
    Opis:
    Water hyacinth (WH) biomass is one of the popular materials in the Vietnamese Mekong Delta, a potential substrate for biogas production. The effectiveness of utilizing WH for producing biogas under anaerobic digestion was demonstrated in the previous studies, but the research was focused on the loading rate of about 1.0% volatile solid (VS). Therefore, in the present study, a semi-continuous anaerobic digestion experiment was conducted with the five levels of VS, including 1.0%VS, 1.5%VS, 2.0%VS, 2.5%VS, and 3.0%VS, to examine how loaded VS can affect biogas production. Each treatment was designed with three replications over 60 days. The measured parameters included pH, temperature (Temp; °C), redox potential (Eh; mV), daily produced biogas volume (L), cumulative biogas volume (L), and methane (CH4) concentration (%) during the 60 days of the experiment. The obtained results showed that pH, tempt, and Eh parameters did not negatively affect biogas production. However, the volume of daily biogas in the treatment of 3.0%VS was higher than in other treatments. In addition, the cumulative biogas volume in the treatment of 3.0%VS was the highest and significantly different between all reactors (p<0.05). Meanwhile, the treatment of 1.0%VS was known with the lowest values. The study explored that the volume of biogas could be increased when the organic loading rate VS is increased.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 2; 230--237
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Produkcja żywca jagnięcego w warunkach wypasu ciągłego
    Slaughter lamb production under conditions of continuous grazing
    Autorzy:
    Rogalski, M.
    Klos, J.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/795844.pdf
    Data publikacji:
    2001
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2001, 479
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methane Production from Food Garbage under the Batch and Semi-Continuous Anaerobic Digestion: Effect of Total Solid
    Autorzy:
    Thuan, Nguyen Cong
    Tokihiko, Fujimoto
    Ngan, Nguyen Vo Chau
    Powiązania:
    https://bibliotekanauki.pl/articles/24201722.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    batch digester
    biogas
    food garbage
    semi-continuous digester
    total solid
    Opis:
    In line with modern era, it is a high demand of renewable energies due to fossil fuels crisis. This study applies food garbage to produce biogas - an alternative renewable energy source – under lab-scale batch and semi-continuous reactors. Designing with four loading total solid (TS) rates of 1.0%, 1.5%, 2.0%, and 2.5%, the batch and the semi-continuous testing set up in 1.5 L and 21 L plastic reactors, respectively. Both testing was run in 60 days, produced biogas volume and compositions were recorded daily in semi-continuous reactors, and every ten days in the batch reactors. The results show that in batch testing, the biogas yields of treatments 1.0%TS, 1.5%TS, and 2.0%TS were better than those for treatment of 2.5%TS; however, %CH4 concentrations were better for treatments 2.0%TS and 2.5%TS. For the semi-continuous testing, the loading rate of 2.5% total solid food garbage produced the highest biogas yield which could meet the household demand of daily gas. Up to the day of 60, the %CH4 concentration was nearly 45% which proof the biogas can be used for cooking. H2S concentration in biogas was high which must be reduced to use produced biogas for cooking purpose. Further study needs to avoid accumulation of soluble organic acids, leading the low pH and inhibits methane-producing microorganisms in food garbage anaerobic reactor.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 4; 264--278
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of enterprise maturity on the implementation of Six Sigma concept
    Autorzy:
    Kosieradzka, A.
    Ciechańska, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/407450.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    continuous improvement
    six sigma
    maturity model
    maturity level
    production management
    Opis:
    Six Sigma as the continuation of comprehensive quality management TQM is of interest to many enterprises. Unfortunately, not everybody successfully implements quality improvement projects using Six Sigma tools. This approach requires proper preparation in many areas of the company’s operation, including: organization of processes, establishing measures, employee engagement and creating conditions for continuous improvement. The goal of the article is to present on the case study the idea of using the organizational maturity model for production management to assess a readiness of organization to implement Six Sigma. The case study presents a company maturity level diagnosis and a successful project of quality and productivity improvement using the Six Sigma concept, confirming that the organization’s maturity model is the appropriate tool for assessing multi-faceted preparation for successful implementation of Six Sigma projects.
    Źródło:
    Management and Production Engineering Review; 2018, 9, 3; 59-70
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected Problems of the Microstructure Evolution During Microalloyed Steel Wire Rod Production Process
    Autorzy:
    Kwiecień, M.
    Graca, P.
    Muszka, K.
    Majta, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/351722.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    continuous casting
    thermomechanical processing
    AAD method
    microalloyed steel
    Opis:
    In the present study, we have discussed the selected problems of microstructure development during the whole manufacturing process, i.e. continuous casting, thermomechanical processing, and cold metal forming of the microalloyed steels wires. In the investigated steels, the microstructure development was controlled by the history of deformation and by the effects of microalloying elements, mostly Nb, Ti, and B. It has been concluded that obtained in the ultrafine grained microalloyed steel wires mechanical properties were first of all resulting from specific structural composition and grain refinement. Additionally, it has been proven that austenite grain refinement, that increases nucleation rate during the austenite-to-ferrite phase transformation, as a result of the thermomechanical processing, are very beneficial from point of view of the final mechanical properties. This problem starts to be very important when the microalloyed steel products are subjected to severe plastic deformation, as it has been shown discussed in the present work for combined processes of wire drawing and wire flattening.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 899-904
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Process Conditions for the Preparation of Copper Alloys Post-Production Chips for the Continuous Casting Process
    Autorzy:
    Malec, Witold
    Cwolek, Beata
    Brudny, Anna
    Kulasa, Joanna
    Marek, W.
    Stolorz, K.
    Wróbel, D.
    Filipowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/27314152.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    waste
    recycling
    bronze
    moisture of waste
    continuous casting
    odpady poprodukcyjne
    recykling
    brąz
    wilgotność odpadów
    odlewanie ciągłe
    Opis:
    The paper presents the results of research aimed at developing assumptions for the preparation of a charge in the form of fine scrap copper alloys (chips/shells) guaranteeing effective removal of impurities and obtaining a metal bath of the required metallurgical quality. The tests were conducted for tin-zinc-lead bronze of the CC499K grade. As part of the work, the characteristics of this type of waste available on the market were made in terms of quality and the possibility of their use for the production of both alloys and finished products, taking into account the elimination of harmful impurities that may ultimately affect the production process adversely. The subject of the work was the selection of appropriate waste cleaning methods in the form of an oily shell in the CC499K (CuZn5Sn5Pb2) grade and its drying in terms of increasing the use of impure waste from machining as scrap for direct melting. The waste was assessed in relation to individual parameters. The research was carried out on 3 groups of waste, with varying degrees of moisture.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 2; 43--50
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimisation of the Thermal Process in Ladle Metallurgy in Terms of the Impact on Energy Consumption and the Environmental Burden During Steel Production
    Autorzy:
    Lampa, Martin
    Mokrošová, Lenka
    Powiązania:
    https://bibliotekanauki.pl/articles/2174906.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    casting ladle
    ladle furnace
    extra-furnace processing
    lining
    energy consumption
    ecological burden
    steel production
    continuous casting
    high-temperature heating
    Opis:
    The paper focuses on reducing the energy intensity of ladle metallurgy as part of steel production and the associated reduction of pollutant emissions. It can be achieved by optimising the thermal work of metallurgical aggregates in terms of the impact on energy consumption and the environmental burden of steel production. It is about minimising the heat loss of liquid steel in the casting ladle throughout the entire process, from the melting equipment, through the extra-furnace processing, to the continuous casting of the steel.
    Źródło:
    Rocznik Ochrona Środowiska; 2022, 24; 246--259
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Features of control processes in organizational-technical (technological) systems of continuous type
    Autorzy:
    Korobiichuk, Igor
    Ladanyuk, Anatoliy
    Boiko, Regina
    Hrybkov, Serhii
    Powiązania:
    https://bibliotekanauki.pl/articles/2141889.pdf
    Data publikacji:
    2020
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    sugar production
    control object
    technological monitoring
    automated complexes
    uncertainty of information
    neuro-fuzzy networks
    Opis:
    Technological complexes of various industries are characterized by certain modes of operation (technological regulations), which correspond to the set of variables of different nature, which have a high-dynamics of change and determine the main technical and economic performance of the object. The aim of the research is to identify information software approaches to support decision-making in organizational-technical (technological) systems. Research results are obtained through grouping, generalization and comparison methods. The scientific significance of the results are to determine the objective need to use intelligent decision support subsystems to quickly manage complex organizational-technical systems based on both: clear and formalized data and knowledge and high-quality fuzzy estimates.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 4; 11-17
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Projekt doskonalenia systemu produkcyjnego - studium przypadku
    Improvement Project of Production System - a Case Study
    Autorzy:
    Duda, Jan
    Wojakowski, Paweł
    Gola, Łukasz
    Warżołek, Dorota
    Powiązania:
    https://bibliotekanauki.pl/articles/1828416.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Gdańska
    Tematy:
    implementation project
    continuous improvement
    value stream mapping
    VSM
    projekt wdrożeniowy
    doskonalenie produkcji
    mapowanie strumienia wartości
    Opis:
    The article presents an approach to the research project in the field of production engineering in the framework of cooperation between science and industry. The project was conducted in a manufacturing company of automotive industry that operates in Poland. The main objective of the project is to conduct value stream mapping, including development of current state map including the observation of the process of preparing and assembling two products, working out the documentation of observed production processes and developing charts to compare planned and observed working time. Based on the current state map some suggestions to improve production process “from door to door” of the company are demonstrated. Suggestions for improvement of the current state are presented on the future state map.
    Artykuł prezentuje podejście do realizacji projektu badawczego z dziedziny inżynierii produkcji w ramach współpracy nauki z przemysłem. Projekt został zrealizowany w przedsiębiorstwie produkcyjnym branży motoryzacyjnej działającym na terenie Polski. Celem głównym projektu było przeprowadzenie mapowania strumienia wartości obejmujące opracowanie mapy stanu obecnego, w tym obserwację procesu przygotowania i montażu dwóch wyrobów. Opracowano stosowną dokumentację dotyczącą zaobserwowanych procesów produkcyjnych oraz wykresy porównawcze planowanego i zaobserwowanego nakładu pracy. Na tej podstawie zaproponowano zmiany doskonalące przebieg procesu produkcyjnego "od drzwi do drzwi" przedsiębiorstwa. Propozycje doskonalenia stanu obecnego są zaprezentowane na mapie stanu przyszłego.
    Źródło:
    Przedsiębiorstwo we współczesnej gospodarce - teoria i praktyka; 2017, 2, 21; 41-52
    2084-6495
    Pojawia się w:
    Przedsiębiorstwo we współczesnej gospodarce - teoria i praktyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Selected Physical and Chemical Soil Properties and their Management for Arable Crop Production in Southern Adamawa State
    Autorzy:
    Gisilanbe, S. A.
    Barnabas, I. M.
    Iheka, W.
    Garpiya, B. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1076675.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Continuous cultivation
    Leaching
    Pedon
    Soil Fertility
    Soil Management
    Opis:
    Soil is essential for food production, and there is need practice sustainable soil management. This study was aimed to evaluate physical and chemical properties of soils and their management in three farming communities; Sangasumi (SGS), Gangkoen (GGK) and Gangbuen (GGB) of Southern Adamawa State, Nigeria. The intent is to encourage optimum land use planning and increase the efficiency in the use of soil resources. In the work, a digital Terrain Model (DTM) was generated from the map of the study area, and three elevation ranges were identified; 660-780m - representing the upper-slope in SGS, 540-660m - representing the middle-slope in GGK and 420-540m - representing the lower-slope in GGB, respectively. Three slope positions were delineated using the Geographic Information System (GIS) and their coordinates were obtained by means of a Handheld Geographic Positioning System (GPS). Three profile pits were dug on each of the locations and soil samples were collected in each of the identified horizon of the pits. Standard laboratory procedures were then used to determine soil physical and chemical properties. Herein, results for particle size analysis indicated that the soils were predominantly sand, ranging between 51% to 91% across the pedons and %sand was positively correlated with bulk density. Moreover, soil pH in each sample was slightly acidic to neutral (6.1-6.5 to 6.6-7.3), while organic carbon and total nitrogen levels were low (<1%, <0.15%) and available phosphorus levels were medium (10-20ppm). In contrast, magnesium was high (>1), sodium recorded up to 0.60cmol/kg, potassium was also high (>0.3) and %base saturation were generally medium to high (50-80 to >80). Results suggest the soils have potentials for arable farming. However, soil erosion hazards had affected parts of the fields; this lead to reduction in soil fertility and crop yields. Addition of organic and inorganic fertilizers and control of soil erosion will greatly improve soil fertility losses and increase crop yields.
    Źródło:
    World News of Natural Sciences; 2019, 25; 44-60
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining a quality place in the process of continuous improvement based on the principle of Toyota management in questions - a case study
    Autorzy:
    Jagusiak-Kocik, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/34670808.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    improvement
    quality
    Toyota management principles
    BOST survey
    doskonalenie
    jakość
    zasady zarządzania Toyoty
    ankieta BOST
    Opis:
    The paper presents an analysis of an innovative method based on the principles of the Toyota Production System - BOST survey, which was carried out in 8 selected production companies from the plastics processing industry operating in the Silesian Voivodeship. Each question in the BOST survey relates to a given Toyota Rule and the Toyota House Roof. Thanks to this survey, you can learn the opinion of the surveyed employees on many areas of the functioning of a given enterprise, which may be an important hint to the operational and strategic activities of the enterprise. In the study, 1 question was selected for analysis, containing a set of factors (areas) closely related to process improvement and personal characteristics of the respondents was analyzed. The result of the work is to determine the position of quality in the continuous improvement process according to the surveyed employees and to propose improvement activities for selected companies.
    Źródło:
    Quality Production Improvement - QPI; 2021, 3, 1; 251-258
    2657-8603
    Pojawia się w:
    Quality Production Improvement - QPI
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Innovative educational program for biogas production carried out at University of Hradec Králové (CZ) and at University of Opole (PL)
    Innowacyjny program edukacyjny dotyczący wytwarzania biogazu realizowany na uniwersytetach w Hradec Králové (CZ) i Opolu (PL)
    Autorzy:
    Loskot, J.
    Smolík, M.
    Hyšplerová, L.
    Radocha, K.
    Kříž, J.
    Eminger, S.
    Dołhańczuk-Śródka, A.
    Ziembik, Z.
    Wacławek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/106474.pdf
    Data publikacji:
    2016
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    biogas plants
    continuous measurement
    modelling
    biogazownie
    pomiar ciągły
    modelowanie
    Opis:
    Recently, there is a growing pressure on a rapid construction of agricultural biogas plants, particularly in the Czech-Polish border region. It is an area with large expanses of agricultural land which can serve to supply biogas plants with biomass. This strategy should contribute to harmonize the common agricultural policy of the European Union. A need for qualified operators of these stations on this territory is also increasing. Therefore we first include a demonstration of an education program for students in the field of agricultural waste anaerobic fermentation and biogas production. We present here the first part of an innovative approach which we use in the teaching program “Physico-technical Measurements and Computer Technology” at the Faculty of Science at the University of Hradec Kralove and also in the education of internshipers from the Faculty of Natural Sciences and Technology at the University of Opole. There are requirements to fulfil labour market expectations and to make this subject more attractive for the students. Students’ theoretical and practical preparation constitutes a comprehensive source of knowledge and skills required in a real life job. Joined theoretical and practical knowledge gained by students, reinforced by the skills developed during task analysis followed by their solution, provides the future graduate higher quality abilities and better position in the labour market.
    W ostatnim czasie rośnie nacisk na budowę biogazowni rolniczych, szczególnie w czesko-polskim regionie przygranicznym. Jest to region, gdzie występują duże obszary gruntów rolnych mogących służyć do zasilania biogazowni. Strategia ta powinna przyczynić się do harmonizacji wspólnej polityki rolnej Unii Europejskiej. W związku z powyższym wzrasta również potrzeba wykształcenia wykwalifikowanych operatorów tych stacji. Pierwsza część pracy obejmuje prezentację akademickiego programu edukacyjnego w dziedzinie fermentacji beztlenowej odpadów i wytwarzania biogazu pochodzącego z produkcji rolnej. Zaprezentowano część innowacyjnego podejścia, które wykorzystywane jest w programie nauczania „Pomiary fizyko-techniczne oraz technologie komputerowe” na Wydziale Nauk Przyrodniczych Uniwersytetu Hradec Kralove, a także w edukacji studentów Wydziału Przyrodniczo-Technicznego Uniwersytetu Opolskiego. Wymagania te mają sprostać oczekiwaniom rynku pracy i uczynić kierunek studiów bardziej atrakcyjnym. Powiązanie przygotowania teoretycznego i praktycznego studentów tworzy kompleksowe źródło wiedzy i kształtuje umiejętności niezbędnych do pracy w biogazowniach. Zarówno wiedza teoretyczna, jak i umiejętności praktyczne zdobyte przez studentów, wzbogacone o umiejętności analizy zadań, a następnie ich rozwiązania, zapewnią przyszłym absolwentom większe możliwości i lepszą pozycję na rynku pracy.
    Źródło:
    Chemistry-Didactics-Ecology-Metrology; 2016, 21, 1-2; 61-74
    2084-4506
    Pojawia się w:
    Chemistry-Didactics-Ecology-Metrology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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