Temat: treatment process - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effect of Atmospheric-Pressure Gas-Plasma Treatment on Surface Properties of Hot-Dip Zn-Mg-Al Alloy-Coated Steel
Autorzy:: Jeong, Chang-U
Kim, Jae-Hyeon
Park, Je-Shin
Kim, Min-Su
Kim, Sung-Jin
Oh, Min-Suk
Powiązania:: https://bibliotekanauki.pl/articles/2203736.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: plasma treatment
Zn-Mg-Al-galvanized steel
surface energy
process gas
Opis:: The effect of plasma-radical change on the surface properties of Zn-Mg-Al ternary-alloy-coated steel sheets during atmospheric-pressure (AP) plasma treatment using different process gases: O2, N2, and compressed air was investigated. The plasma-induced radicals promoted the formation of chemical particles on the surface of the Zn-Mg-Al coating, thereby increasing the surface roughness. The surface energy was calculated using the Owen-Wendt geometric equation. Contact angle measurements indicated that the surface free energy of the alloy sheets increased upon AP plasma treatment. The surface properties of the Zn-Mg-Al coating changed more significantly in the order air > O2 > N2 gas, indicating that the plasma radicals facilitated the carbonization and hydroxylation of the Mg and Al components during the AP plasma treatment.
Źródło:: Archives of Metallurgy and Materials; 2023, 68, 1; 187--190
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Transformation of Traditional Wastewater Treatment Methods into Advanced Oxidation Processes and the Role of Ozonation
Autorzy:: Nikbeen, Tamana
Nayab, Ahmad Khalid
Powiązania:: https://bibliotekanauki.pl/articles/24201749.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: wastewater treatment
traditional oxidation method
ozonation
advanced oxidation process
disinfection by-product
micropollutants
Opis:: Technology advancement improves the quality of life, however, it might also introduce new pollutants to the ecosystem, which needs to deal with for the goal of a sustainable ecosystem. Municipal and industrial wastewater has always been important in improving the quality of life while maintaining the sustainability of our planet simultaneously. The diversity of pollutants in wastewater requires more advanced and demanding treatment processes. The ozonation, as a crucial part of the advanced oxidation processes, is a superior oxidation method compared to traditional oxidation methods. After the recognition of ozone as GRAS (generally recognized as safe), its applications have diversified and is used currently for microbial inactivation, degradation of recalcitrant organic compounds, removal of a diverse range of micropollutants, solubilization and reduction of sludge, and removal of color and odor components in wastewaters treatment processes. However, some considerable challenges still exist towards its universal application, such as high ozone generation costs, diversity of pollutants, and formation of ozonation by-products, which still require further studies. The main theme of this review paper is the transformation of traditional oxidation methods into advanced oxidation processes and the role of ozonation in this regard, including its applications, by-products, and its comparison with the traditional oxidation methods and advanced oxidation processes.
Źródło:: Journal of Ecological Engineering; 2023, 24, 6; 173--189
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Active Physical Remediation of Acid Mine Drainage: Technologies Review and Perspectives
Autorzy:: Mulopo, Jean
Powiązania:: https://bibliotekanauki.pl/articles/2105273.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: ion-exchange
acid mine drainage
electrochemical
adsorption
membrane process
active physical treatment
Opis:: The successful acid mine drainage (AMD) treatment needs site-specific installation and implementation, as well as the deployment of technology that is compatible with the pollutants contained in the AMD. If key by-products of the AMD can be recovered, the financial sustainability of the AMD remediation method may be greatly improved. Additional research into novel and innovative solutions is necessary to advance in this direction. To accomplish this, it is necessary to have a complete awareness of current remediation technologies that are available and accessible. Active physical treatment methods such as ion exchange, adsorption, electrochemistry, and membrane techniques were examined in this article. Membrane technology excels in terms of ease of use, versatility, and environmental effect but produces brine streams the management of which remains vital for future adoption of the technology. Liquid membranes (LM), Micellar Enhanced Ultra-Filtration (MEUF), and Polyelectrolyte Enhanced Ultra-Filtration (PEUF) are all innovative membrane technologies that may provide some possibilities for metal recovery from chemical sludge and/or brine streams. Electrochemical technologies are considered an attractive alternative for AMD treatment, because they require only electricity as a consumable and can treat AMD to high standards by removing metals via (co)precipitation and sulfate via ionic migration (when an anion-exchange membrane is used in the configuration), while producing significantly less sludge. However, the accepted shortcomings include membrane/electrode fouling produced by (co)precipitates on the active surfaces necessary for the process, a lack of understanding regarding the effective scaling up to industrial scale, and the relatively expensive capital expenditure (CAPEX) required. The removal of heavy metals from AMD effluents by adsorption has a number of technical and environmental benefits, including high efficiency, and environmental friendliness. Despite its benefits, this technique has certain hurdles, such as the production process for low-cost adsorbents.
Źródło:: Journal of Ecological Engineering; 2022, 23, 6; 148--163
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Development of an automated system for electrochemical production of coagulant based on photocolorimetric analysis
Autorzy:: Safonyk, Andrii
Hrytsiuk, Ivanna
Klepach, Marko
Mishchanchuk, Maksym
Khrystyuk, Andriy
Powiązania:: https://bibliotekanauki.pl/articles/2073739.pdf
Data publikacji:: 2022
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: coagulant
colour of water
electrocoagulation process
photocolorimetric method
RGB
total iron
wastewater treatment
Opis:: The article describes the development of a model problem for electrocoagulation treatment of industrial wastewater taking into account changes in voltage and current. The study included computer simulation of the change in the concentration of iron at the output of the electrocoagulator at variable current levels. The laboratory-scale plant was developed for the photocolorimetric analysis of the iron-containing coagulant. It consisted of a flowing opaque cel through which water is pumped with a constant flow and also the block for processing and storage of information. Such structure allows to reduce human participation in the measurement process and to ensure the continuity of measurement without any need for sampling of the tested material, as well as to reduce the measurement cost. During the processing of results, graphical dependences were determined between RGB-components of water colour and the corresponding concentration of total iron and Fe3+ in water.
Źródło:: Journal of Water and Land Development; 2022, 52; 75--80
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of the content of corn stalk fibres and additional heat treatment on properties of eco-friendly fibreboards bonded with lignosulphonate
Autorzy:: Mihajlova, Julia
Savov, Viktor
Simeonov, Tsvetan
Powiązania:: https://bibliotekanauki.pl/articles/2201362.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: dry-process fibreboards
eco-friendly
corn stalk fibres
lignosulphonate
additional heat treatment
Opis:: This study aims to find the possibility of producing eco-friendly thin Medium Density Fibrepanels (MDF) with the participation of corn stalk fibres and using lignosulphonate as a bio-based binder. The main novelty in the research is the establishment of the effect of additional heat treatment on the properties of MDF manufactured with the participation of non-wood lignocellulosic raw materials and bonded with bio-based adhesive – lignosulphonate. Panels with 15% lignosulphonate content and variation of the content of corn stalk fibres from 0% to 30% were manufactured. Previous experiments showed that when only lignosulfonate is used as a binder, the manufactured panels generally have low waterproofness. To reduce the effect of this main disadvantage, the panels were subjected additionally to heat treatment. The properties of the MDF with and without additional heat treatment were compared. The effect of both the content of corn stalk fibres and the additional heat treatment was found. As a whole, the additional heat treatment improves the properties of MDF produced with lignosulphonate. Still, in case of increased content of corn stalk fibres, it is necessary to apply softened regimes than the ones selected for this study.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2022, 65, 209; Art. no. 1644-3985.395.06
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Investigation of heating time of a bundle of steel bars
Badanie czasu nagrzewania wiązki prętów stalowych
Autorzy:: Aghbalyan, S.
Bagdasaryan, V.
Wyczółkowski, R.
Powiązania:: https://bibliotekanauki.pl/articles/28766072.pdf
Data publikacji:: 2022
Wydawca:: Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:: steel bar
heating time
thermal conductivity
effective thermal conductivity
energy balance
heat treatment
process optimization
Źródło:: Acta Scientiarum Polonorum. Architectura; 2022, 21, 3; 25-30
1644-0633
Pojawia się w:: Acta Scientiarum Polonorum. Architectura
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Raw Water Quality Assessment for Improvement Plan at Thu Duc Water Treatment Plant, Vietnam
Ocena jakości wody surowej na potrzeby planu poprawy w stacji uzdatniania wody Thu Duc w Wietnamie
Autorzy:: Ho, Ngo Anh Dao
Nguyen, Thi Minh Trang
Nguyen, Thi Trang Trung Nghia
Ngo, Minh Khoi
Powiązania:: https://bibliotekanauki.pl/articles/2172072.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Przeróbki Kopalin
Tematy:: water intake
monitoring
run-off flow
organic matter
water treatment process
Thu Duc Water Treatment Plant
Vietnam
pobór wody
odpływ
materia organiczna
proces uzdatniania wody
zakład uzdatniania wody Thu Duc (miasto Ho Chi Minh, Wietnam)
Opis:: A conventional water treatment process is currently operated at Thu Duc Water Treatment Plant (TDWTP, Ho Chi Minh City, Vietnam) in which raw water is collected from Dong Nai River at Hoa An water intake and pumping station. The raw water quality is currently fluctuated due to the effects of run-off flows which has been increasing recently. This issue directly affects the operation and performance of existing treatment process at TDWTP since the current treatment are all based on traditional technologies and have been operating for a long time. This study is conducted to evaluate the quality of raw water collected at Hoa An intake station during the period of 2018–2020 with the aim to support the consideration of improvement and enhance the operation efficiency at TDWTP. The raw water quality is evaluated by investigating physico-chemical and biological parameters during the 36 months monitoring. This helps to produce a feasible and reliable results which may then can be used as a scientific database for the improvement plan at TDWTP. Results show that the changes of water quality during the investigated time is so complicated, and the concentration of most monitoring parameters is highly seasonal fluctuated. Specifically, the amounts of organic matters, microorganism, nitrogen compounds (NH4 +, NO2 - , NO3 - ) tend to increase strongly, which may be due to the urbanization and industrialization. The management of run-off flows on upstream of water intake and pumping station is also an important aspect which need to be considered to prevent the diffusion and spread of pollution. In addition, the effects of climate changes are the important reason which leads to the seasonal changes of flow and water quality. These issues cause a big challenge for TDWTP to maintain the treatment efficiency and overall performance. This study also proposes several management and technical solutions to address the changes of raw water quality in the future, which may be useful for TDWTP during their consideration to improve the treatment process.
Konwencjonalny proces uzdatniania wody jest obecnie prowadzony w zakładzie uzdatniania wody Thu Duc (TDWTP, miasto Ho Chi Minh, Wietnam), w którym surowa woda jest pobierana z rzeki Dong Nai i z przepompowni Hoa An. Jakość wody surowej podlega obecnie wahaniom ze względu na skutki spływów, które ostatnio nasilają się. Kwestia ta ma bezpośredni wpływ na funkcjonowanie i wydajność istniejących procesów oczyszczania w TDWTP, gdyż wszystkie obecne działające oczyszczalnie oparte są na tradycyjnych technologiach i działają od dłuższego czasu. Niniejsze badanie ma na celu ocenę jakości wody surowej pobieranej ze stacji poboru Hoa An w latach 2018–2020 w celu wsparcia rozważań nad poprawą i zwiększeniem efektywności działania TDWTP. Jakość wody surowej oceniana jest poprzez badanie parametrów fizykochemicznych i biologicznych podczas 36-miesięcznego monitoringu. Pozwoliłó to uzyskanie wiarygodnych wyników, które następnie mogą być wykorzystane jako naukowa baza danych dla planu modernizacji TDWTP. Wyniki pokazują, że zmiany jakości wody w badanym okresie są bardzo złożone, a stężenia większości parametrów monitoringu podlegają dużym wahaniom sezonowym. Szczególnie silnie wzrastają ilości materii organicznej, mikroorganizmów, związków azotu (NH4 +, NO2 - , NO3 - ), co może być spowodowane urbanizacją i uprzemysłowieniem. Ważnym aspektem, który należy wziąć pod uwagę, aby zapobiec rozprzestrzenianiu się zanieczyszczeń, jest również zarządzanie przepływami odpływowymi przed ujęciem wody i przepompownią. Ponadto skutki zmian klimatu są ważną przyczyną sezonowych zmian przepływu i jakości wody. Kwestie te stanowią duże wyzwanie dla TDWTP, aby utrzymać skuteczność oczyszczania i ogólną wydajność. W niniejszym opracowaniu zaproponowano również kilka rozwiązań w zakresie zarządzania i rozwiązań technicznych mających na celu zajęcie się zmianami jakości wody surowej w przyszłości, które mogą być przydatne dla TDWTP podczas rozważań nad poprawą procesu oczyszczania.
Źródło:: Inżynieria Mineralna; 2022, 2; 135--140
1640-4920
Pojawia się w:: Inżynieria Mineralna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The Application of Six Sigma for Process Control Analysis in the Malaysian Poultry Wastewater Treatment
Autorzy:: Ishak, Anuar Bin
Mohamad, Effendi Bin
Arep, Hambali Bin Arep
Powiązania:: https://bibliotekanauki.pl/articles/2086415.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: six sigma
wastewater treatment
poultry wastewater
statistical quality control
process capability
treatment reliability
Opis:: In this paper, the researchers presented the process control analysis of a Poultry Wastewater (PWW) treatment plant that was designed to comply with the Environmental Quality (Industrial Effluent) Regulations, 2009. In this pilot case study, the researchers highlighted the fact that owing to the existing global environmental challenges, a Six Sigma approach needs to be used for developing a new technique that helps in optimising process capability and assesses the treatment reliability. This would allow the effective treatment of different pollutants like pH, BOD5, TSS, COD, O&G and NH3-N before their discharge into the environment. The researchers used several quality control process tools like the I-MR control charts, treatment process capability analysis and treatment reliability assessment in the study. After analysing the data, the researchers concluded that the plant could effectively treat NH3-N, as well as fairly decrease the pH, BOD5, and COD values, whereas it displayed low ability in treating TSS and O&G within the research period. The researchers noted that the process showed low reliability in the treatment of TSS and O&G, i.e., 88.6% and 29.8% respectively, led to the discharge of fine colloids in the effluent. This was attributed to problematic processes in the PWW treatment procedure, such as malfunction of the DAF unit process, ineffective physical-chemical treatment, and tertiary filtration breakdown. The researchers concluded that this PWW plant required additional control and design improvement so that it released a low concentration of toxic compounds in the effluent discharge, and complied with the standards. This research could be used as a reference for additional studies that aimed to improve the quality of the wastewater treatment processes.
Źródło:: Journal of Ecological Engineering; 2022, 23, 5; 116--129
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Batch and Continuous Photo-Fenton Oxidation of Reactive-Red Dye from Wastewater
Autorzy:: Hassan, Ali A.
AlJaberi, Forat Yasir
Al-Khateeb, Raid T.
Powiązania:: https://bibliotekanauki.pl/articles/2025725.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: dye
wastewater treatment
advanced oxidation process
central composite design
optimization
Opis:: This paper aims to investigate the ability of photo-Fenton technology to remove Reactive Red dye (RR-dye) from wastewater using batch and continuous operating modes. The batch mode of photo-Fenton removal of organic content was conducted under the influence of solution pH (3–10), hydrogen peroxide (25–100 ppm), irradiation time (20–90 min), ferrous sulphate (5–20 ppm), and temperature (25–60 °C). For comparison, the continuous treatment was conducted under the influence of the flow rate of the contaminated solution (10, 20, 30, 40, and 50 mL/min). The results revealed that the treatability of the batch mode was more effective compared to the continuous mode. In the batch process, the organic contaminant was completely removed compared to that of 82% obtained when the continuous system was performed. The optimization process showed that the optimal values of the operating variables in the case of the batch removal of RR-dye were 3, 78 ppm, 90 min, 20 ppm, and 60 °C for pH, hydrogen peroxide, irradiation time, ferrous sulphate, and temperature, respectively. Moreover, the reversion F-value was 21.69, the probability P value was less than 0.001, and the correlation coefficient was (R2 = 0.9455), which illustrative the significance of the model obtained for the batch process.
Źródło:: Journal of Ecological Engineering; 2022, 23, 1; 14-23
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Own experience in the diagnosis and treatment of elongated styloid process syndrome
Autorzy:: Wacławek, Magdalena
Pietkiewicz, Piotr
Niewiadomski, Piotr
Olszewski, Jurek
Powiązania:: https://bibliotekanauki.pl/articles/1397274.pdf
Data publikacji:: 2021
Wydawca:: Index Copernicus International
Tematy:: diagnostics
elongated styloid process syndrome
treatment
Opis:: Introduction: The aim of the study was to present selected cases with Eagle’s syndrome diagnosed and treated at the Department of Otolaryngology, Laryngological Oncology, Audiology and Phoniatrics, Medical University of Lodz, in the years 2016–2020. Material and method: Five selected clinical cases with Eagle’s syndrome are presented, including three male patients and two female patients, aged 28 to 42 years. Results: The prevalence of Eagle’s syndrome was similar for both female and male patients. The carotid artery syndrome, which is characterized by: visual disturbances, unilateral pain located along cervical vessels, headache and migraine, was more common. Lack of proper diagnosis of Eagle’s syndrome often significantly delays the implementation of proper treatment and thus exposes patients to long-term struggle with pain. Our observations have shown that the time between the onset of symptoms and correct diagnosis in patients averaged about five years. 3D-CT scan is the gold standard for detecting Eagle’s syndrome. An intraoral approach was used in surgical treatment. Although this approach offers shorter treatment time and better cosmetic effect, there is also a greater risk of complications associated with limited visibility of the surgical field and infection. Conclusions: Although styloid syndrome usually occurs bilaterally, these patients reported unilateral symptoms. No correlations were found between the prevalence of Eagle’s syndrome and sex, the length of the styloid process or age, nor side of the body. The best healing effect is obtained by surgical correction/reduction of the elongated styloid process.
Źródło:: Polish Journal of Otolaryngology; 2021, 75, 2; 21-27
0030-6657
2300-8423
Pojawia się w:: Polish Journal of Otolaryngology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Сriminal Law Protection of the Autonomy of Patients in Ukraine. Part 1
Autorzy:: Likhova, Sofiya
Mozgawa, Marek
Powiązania:: https://bibliotekanauki.pl/articles/2096928.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:: patient
patient’s autonomy
treatment process
violation of patient’s autonomy
doctor
criminal law protection
pacjent
autonomia pacjenta
prawa pacjenta
naruszenie autonomii pacjenta
lekarz
ochrona prawnokarna
Opis:: The article aims to analyze the phenomenon of “patient’s autonomy” as an object of criminal law protection. Patients’ autonomy is one of the most important rights. Respect for it is one of the factors ensuring the correct treatment process. The article is divided into two parts. In this part, the authors analyze the legal acts of Ukraine, which regulate the process of providing medical services and guarantee patients’ right to autonomy. The authors discuss, i.a., the issue of the patient’s consent to medical interventions or the right to information about his or her state of health. They also point to statistics on offences committed by medical staff members in connection with their professional activities. Furthermore, they point out that the problem of violation of patient’s autonomy should be looked at not only from the legal but also from the social point of view. This applies to the patient–medical relationship, in which the doctor plays a leading role. Moreover, the content of these relations lies not only on the professional but also on the bioethical level.
Celem artykułu jest analiza zjawiska „autonomii pacjenta” jako przedmiotu ochrony prawnokarnej. Autonomia pacjenta jest jednym z najważniejszych praw. Jej poszanowanie jest jednym z czynników zapewniających prawidłowy proces leczenia. Artykuł podzielony jest na dwie części. W tej części autorzy analizują akty prawne Ukrainy, które regulują proces udzielania świadczeń medycznych i gwarantują prawo pacjenta do autonomii, a także odnoszą się m.in. do kwestii zgody pacjenta na interwencje medyczne oraz do prawa do informacji o jego stanie zdrowia. Wskazują również na statystyki dotyczące przestępstw popełnianych przez członków personelu medycznego w związku z wykonywaniem czynności zawodowych. Ponadto zwracają uwagę, że na problem naruszania autonomii pacjenta należy spojrzeć nie tylko z prawnego, ale i ze społecznego punktu widzenia. Dotyczy to relacji pacjent–lekarz, w której lekarz odgrywa wiodącą rolę. Co więcej, treść tych relacji leży nie tylko na płaszczyźnie zawodowej, ale i na płaszczyźnie bioetycznej.
Źródło:: Studia Iuridica Lublinensia; 2021, 30, 4; 373-391
1731-6375
Pojawia się w:: Studia Iuridica Lublinensia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Artificial Neural Network as a Virtual Sensor of Nitrate Nitrogen (V) Concentration in an Activated Sludge Reactor
Autorzy:: Płonka, Lesław
Powiązania:: https://bibliotekanauki.pl/articles/1838052.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:: wastewater treatment
activated sludge process
artificial neural networks
virtual sensor
oczyszczalnia ścieków
reaktor z osadem czynnym
sztuczne sieci neuronowe
czujnik wirtualny
Opis:: The paper discusses the use of an artificial neural network to control the operation of wastewater treatment plants with activated sludge. The task of the neural network in this case is to calculate (predict) the readings of the probe measuring the concentration of nitrate nitrogen (V) in one of the biological reactor tanks. Neural networks are known for their ability to universal approximation of virtually any relationship, including the function of many variables, but the process of "training" the network requires the presentation of many sets of input data and corresponding expected results. This is a difficulty in the case of wastewater treatment plants, because some key process parameters are usually not measured online (samples are taken and measurements are taken in the laboratory), and even if they are, the time intervals are large. Bearing in mind the aforementioned difficulty, this work uses a set of input data consisting only of information that can be measured with measuring probes. As a result of the conducted experiments a high compliance of the probe's prediction with the expected values was obtained. The paper also presents data preparation and the network "training" process.
Źródło:: Civil and Environmental Engineering Reports; 2020, 30, 4; 188-200
2080-5187
2450-8594
Pojawia się w:: Civil and Environmental Engineering Reports
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Influence of Zr on AlSi9Cu1Mg Alloy Cast in Ceramic
Autorzy:: Matejka, M.
Kuriš, M.
Bolibruchova, D.
Pastirčák, R.
Powiązania:: https://bibliotekanauki.pl/articles/382580.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: solidification process
heat treatment
aluminium alloys
properties
zirconium
ceramic mould
proces krzepnięcia
stop aluminium
wpływ cyrkonu
obróbka cieplna
forma ceramiczna
Opis:: The article focuses on the analysis of the effect of Zr on the properties of the aluminium alloy AlSi9Cu1Mg. The effect of Zr was evaluated depending on the change in mechanical properties and heat resistance during a gradual addition of Zr with an increase of 0.05 wt. % Zr. Half of the cast experimental samples from each variant were heat treated by precipitation hardening T6 (hereinafter HT). The measured values in both states indicate an improvement of the mechanical properties, especially in the experimental variants with a content of Zr ≥ 0.20 wt. %. In the evaluation of Rm, the most significant improvement occurred in the experimental variant with an addition of Zr 0.25 wt. % after HT and E in the experimental variant with addition of Zr 0.20 wt. % after HT. Thus, a difference was found from the results of the authors defining the positive effect of Zr, in particular at 0.15 wt. %. When evaluating the microstructure of the AlSi9Cu1Mg alloy after Zr alloying, Zr phases are already eliminated with the addition of Zr 0.10 wt. %. Especially at higher levels of Zr ≥ 0.20 wt. %, long needle phases with slightly cleaved morphology are visible in the metal matrix. It can be stated that a negative manifestation of Zr alloying is expressed by an increase in gassing of experimental alloys, especially in variants with a content of Zr ≥ 0.15 wt. %. Experimental samples were cast into ceramic moulds. The development of an experimental alloy AlSi9Cu1Mg alloyed with Zr would allow the production of a more sophisticated material applicable to thin-walled Al castings capable of operating at higher temperature loads.
Źródło:: Archives of Foundry Engineering; 2020, 20, 2; 13-18
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Mathematical Model of the Drying Process of Wet Materials
Model matematyczny procesu suszenia materiałów wilgotnych
Autorzy:: Pavlenko, Anatoliy
Piotrowski, Jerzy Zbigniew
Powiązania:: https://bibliotekanauki.pl/articles/1811536.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: thermal insulation material
mathematical modelling
heat treatment
thermal conductivity
thermal process
materiał termoizolacyjny
modelowanie matematyczne
obróbka cieplna
przewodnictwo cieplne
proces termiczny
Opis:: The problem of heat treatment of wet materials contains the question of the heat and mass inside the body transfer (an internal problem) and in the boundary layer at the interface between phases (an external problem). The amount of removable moisture depends on the degree of each of these processes development. When heated, the moisture content on the surface decreases, creating a concentration difference across the body. Therefore, a flow of moisture occurs in the body from deep layers to the surface, towards which the flow of heat is directed. Thus, when wet materials are heated, complex processes of moisture and heat exchange occur, mutually affecting the enthalpy and moisture content of both the heated material and the environment. The features of mathematical model construction of heating and drying of wet materials process are considered in the article. The drying process is defined as a thermal process with effective heat transfer coefficients with consideration of mass transfer. It makes it possible to obtain analytical dependencies that are convenient for engineering calculations, with which you can determine the temperature field and evaluate the kinetics of wet materials drying.
Problem obróbki cieplnej wilgotnych materiałów obejmuje zagadnienia transferu ciepła i masy wewnątrz komponentu (problem wewnętrzny) i w warstwie granicznej z przemianą fazową (problem zewnętrzny). Ilość usuwanej wilgoci zależy od stopnia rozwoju każdego z tych procesów. Po podgrzaniu zawartość wilgoci na powierzchni zmniejsza się, tworząc różnicę koncentracji w całym materiale. Dlatego w materiale występuje przepływ wilgoci z głębokich warstw na powierzchnię, na którą skierowany jest przepływ ciepła. Oznacza to, że gdy ogrzewane są wilgotne materiały, zachodzą złożone procesy wymiany wilgoci i ciepła, wpływając wzajemnie na entalpię i zawartość wilgoci zarówno ogrzewanego materiału, jak i środowiska.W artykule omówiono cechy budowy modelu matematycznego procesu ogrzewania i suszenia materiałów zawilgoconych. Proces suszenia definiuje się jako proces termiczny o efektywnych współczynnikach przenikania ciepła z uwzględnieniem transferu masy. Umożliwia uzyskanie zależności analitycznych dogodnych do obliczeń inżynierskich, za pomocą których można określić pole temperatury i ocenić kinetykę suszenia wilgotnych materiałów.
Źródło:: Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 347-358
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Zastosowanie procesu Fentona w oczyszczaniu ścieków z przemysłu odlewniczego
Application of the Fenton process in the treatment of wastewater from the foundry industry
Autorzy:: Dawczak, Paulina
Dudziak, Mariusz
Powiązania:: https://bibliotekanauki.pl/articles/126324.pdf
Data publikacji:: 2020
Wydawca:: Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:: przemysł odlewniczy
oczyszczanie ścieków
proces Fentona
foundry industry
wastewater treatment
Fenton process
Opis:: Celem pracy była ocena skuteczności procesu Fentona w oczyszczaniu wybranych ścieków z przemysłu odlewniczego, które wstępnie poddano koagulacji. W procesie koagulacji wydzielono ze ścieków zanieczyszczenia występujące zarówno w fazie zawieszonej, jak i koloidalnej. Dobór korzystnego przebiegu procesu Fentona prowadzono pod względem następujących parametrów: pH ścieków, dawki nadtlenku wodoru, stosunku masowego Fe2+/H2O2 oraz czasu procesu. Dobrane parametry procesu Fentona wynosiły odpowiednio: pH ścieków 2,5, dawka nadtlenku wodoru 5,00 g/dm³, stosunek masowy Fe2+/H2O2 = 0,3 oraz czas procesu 120 min. Dla podanych parametrów wykazano wysoką skuteczność procesu Fentona w obniżeniu chemicznego zapotrzebowania tlenu (ChZT) badanych ścieków z przemysłu odlewniczego. W ściekach obniżyło się również stężenie niejonowych substancji powierzchniowo czynnych (NSPC).
The aim of the study was to evaluate the effectiveness of the Fenton process in the treatment of selected wastewater from the foundry industry, which was initially coagulated. In the coagulation process, contaminants found in the suspended and colloidal phase were separated from the wastewater. The selection of the favorable course of the Fenton process was carried out with the following parameters in mind: wastewater pH, hydrogen peroxide dose, Fe2+/H2O2 mass ratio and process time. The selected parameters of the Fenton process were: wastewater pH = 2.5, hydrogen peroxide dose 5.00 g/dm³, Fe2+/H2O2 mass ratio = 0.3 and process time 120 min. For the given parameters, high efficiency of the Fenton process in lowering the chemical oxygen demand (COD) of the treated wastewater from the foundry industry was demonstrated. In wastewater, the concentration of non-ionic surfactants (NSPC) also decreased.
Źródło:: Proceedings of ECOpole; 2020, 14, 1; 79-87
1898-617X
2084-4557
Pojawia się w:: Proceedings of ECOpole
Dostawca treści:: Biblioteka Nauki

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