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Tytuł:
Comparison of the effects of water and thermal processing on pesticide removal in selected fruit and vegetables
Autorzy:
Lozowicka, B.
Jankowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/15605.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
water processing
food processing
thermal processing
pesticide
fruit
vegetable
processing treatment
Opis:
Fruit and vegetables are a valuable and essential component of a human diet. Unfortunately, the widespread and increasingly popular use of pesticides has largely magnified quantities of pesticide residues in these plant products. Among the best methods for removal of these contaminants from food of plant origin are food processing technologies, which affect the levels of pesticide residues to various degrees. The aim of this study was to compare the effects of different water and thermal processing treatments on pesticide residue concentrations in selected fruit and vegetables obtained from controlled field and tunnel trials. Black currants, broccoli, strawberries and tomatoes sprayed with plant protection products were analyzed. Washing by immersion in chlorine and in ozonated water as well as boiling were used to assess the removal of eleven pesticides in blackcurrants, broccoli, strawberries and tomatoes. Processing factors, which were determined for each combination of a pesticide, commodity and processing method, ranged between 0.03 and 1.66. Washing in ozonated water was more effective than washing in chlorinated water. However, high temperature at boiling caused a significant decrease in the concentration of most compounds (up to 97%), although there were some exceptions. The thermal treatment proved to be the most effective technological process removing pesticide residues from different commodities. The water and thermal processing technologgies tested in this experiment are promising methods for fast and simple removal of pesticide residues from broccoli, black currants, strawberries, tomatoes and possibly other commodities.
Źródło:
Journal of Elementology; 2016, 21, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effects of water and thermal processing on pesticide removal in selected fruit and vegetables
Autorzy:
Łozowicka, B.
Jankowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1189826.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
water processing
food processing
thermal processing
pesticide
fruit
vegetable
processing treatment
Opis:
Fruit and vegetables are a valuable and essential component of a human diet. Unfortunately, the widespread and increasingly popular use of pesticides has largely magnified quantities of pesticide residues in these plant products. Among the best methods for removal of these contaminants from food of plant origin are food processing technologies, which affect the levels of pesticide residues to various degrees. The aim of this study was to compare the effects of different water and thermal processing treatments on pesticide residue concentrations in selected fruit and vegetables obtained from controlled field and tunnel trials. Black currants, broccoli, strawberries and tomatoes sprayed with plant protection products were analyzed. Washing by immersion in chlorine and in ozonated water as well as boiling were used to assess the removal of eleven pesticides in blackcurrants, broccoli, strawberries and tomatoes. Processing factors, which were determined for each combination of a pesticide, commodity and processing method, ranged between 0.03 and 1.66. Washing in ozonated water was more effective than washing in chlorinated water. However, high temperature at boiling caused a significant decrease in the concentration of most compounds (up to 97%), although there were some exceptions. The thermal treatment proved to be the most effective technological process removing pesticide residues from different commodities. The water and thermal processing technologgies tested in this experiment are promising methods for fast and simple removal of pesticide residues from broccoli, black currants, strawberries, tomatoes and possibly other commodities.
Źródło:
Journal of Elementology; 2016, 21, 1; 99-111
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy-saving technologies with the use of water treated in magnetic fields
Ehnergosberegajushhie tekhnologii s ispolzovaniem vody, obrabotannojj v magnitnykh poljakh
Autorzy:
Zhuravska, N.
Malkin, E.
Powiązania:
https://bibliotekanauki.pl/articles/791998.pdf
Data publikacji:
2016
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
water structure
magnetic field
magnetized water
wave motion
water processing
energy saving
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2016, 16, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dewaterability of Digested Sludge Conditioned with Sludge from a Water Treatment Plant
Podatność na odwadnianie przefermentowanych osadów ściekowych kondycjonowanych osadami z stacji uzdatniania wody
Autorzy:
Kowalczyk, Mariusz
Kamizela, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1811949.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
municipal sludge
water processing sludge
conditioning
dewatering
komunalne osady ściekowe
osady pokoagulacyjne
kondycjonowanie
odwadnianie
Opis:
Sewage sludge treatment, including dewatering, represents a technological challenge similar to wastewater treatment. It is necessary for the effective sludge dewatering to use conditioning agents, and currently only polyelectrolytes. However, any factor or substance, including waste, which reduces the bonds between water and solid particles can be considered a conditioning agent. The study verified the possibility of conditioning the digested sludge with sludges from the water treatment plant, mainly produced by coagulation of chlorine iron III and denitrification, was verified. The main process variable was the volumetric fraction of water processing sludges in a mixture with municipal digested sludge amounting to 1:9, 3:7, 5:5. It was found that the sludge from water treatment plants cannot be used as aconditioner of municipal sludge. Deterioration of filtration and dewatering capacity of the tested mixtures and the quality of the separated sludge liquor was observed. The study confirmed the possibility of the use of post-coagulation sludge in sorption of metals and phosphorus.
Przeróbka osadów ściekowych, w tym ich odwadnianie, stanowi równorzędne wyzwanie technologiczne co oczyszczanie ścieków. Koniecznym dla efektywnego odwadniania osadów jest zastosowanie środków kondycjonujących, a obecnie wyłącznie, polielektrolitów. Niemniej jednak każdy czynnik czy substancja, w tym odpad, który umożliwi zmniejszenie powiązania między cząsteczkami wody i fazy stałej może zostać uznany za środek kondycjonujący. W przeprowadzonych badaniach zweryfikowano możliwość kondycjonowania osadów przefermentowanych osadami z stacji uzdatniania wody powstałymi głownie w procesie koagulacji zanieczyszczeń chlorkiem żelaza III oraz denitryfikacji. Główną zmienna procesową był udział objętościowy osadów z uzdatniania wody w mieszaninie z osadami przefermentowanymi wynoszący 1:9, 3:7, 5:5. Stwierdzono, że badane żelazowe osady pokoagulacyjne nie mogą być stosowane jako kondycjoner komunalnych osadów przefermentowanych. Odnotowano pogorszenie filtrowalności i odwadnialności badanych mieszanin oraz jakości oddzielonych cieczy osadowych. Badania potwierdziły możliwość zastosowania osadów pokoagulacyjnych celem sorpcji metali i fosforu.
Źródło:
Rocznik Ochrona Środowiska; 2019, Tom 21, cz. 1; 217-233
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of hydrogen-enriched water gas production technology by processing Ekibastuz coal with technogenic waste
Autorzy:
Dikhanbaev, B.
Dikhanbaev, A. B.
Sultan, I.
Rusowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/140012.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrogen-enriched water gas
reactor of inversion phase–rotary kiln–gas generator
cupreous cast iron
zinc-germanium containing sublimates
gaz wodny wzbogacony wodorem
reaktor fazy inwersyjnej-pieca obrotowego-generatora gazu
żeliwo miedziowe
sublimaty zawierające cynk-german
Opis:
In the dumps of metallurgical enterprises of Kazakhstan about 700 million tons of waste products are generated annually, and are polluting the atmosphere and the soil. The concentration of valuable components in waste products are no lower than in natural resources. The reserves of coal in the Ekibastuz basin are estimated to be more than a billion tons, and almost half of this is made up of ash. Every year, up to 30 million tons of ash-cinder waste is generated, which presents a serious threat to nature. Gallium and germanium concentrations in dumps are approximately 200 grams per ton, which is comparable to the content in coal before processing. The current research aims at creating a unit to obtain hydrogen-enriched water gas from Ekibastuz coal, with the production of zinc, gallium and germanium sublimates, copper-containing cast iron, slag wool and cast stone, through the joint processing of zinc-rich slag and ash-cinder wastes from thermal power plants. To achieve this, we used previous methods of extreme energy saving and a new method, the smelt layer with inversion phase. Experimental results from the “reactor inversion phase – rotary kiln” (RIPh) unit, which processed zinc-germanium contained slag, showed the potential to extract germanium from zinc sublimates, to reduce iron to the form of cupreous cast iron, and to obtain combustible gases and smelt suitable for slag-wool production. Calculations performed on the joint processing of Ekibastuz coal and zinc-rich slag using the proposed unit“ reactor of inversion phase–rotary kiln–gas generator” showed it can obtain hydrogen-enriched watergas, along with the extraction of valuable components of primary raw material.
Źródło:
Archive of Mechanical Engineering; 2018, LXV, 2; 221-231
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural treatment of woolen processing industry wastewater
Autorzy:
Qurashi, S.
Sahu, O.
Powiązania:
https://bibliotekanauki.pl/articles/10942.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
waste water
natural treatment
woolen processing industry
waste water treatment
environment protection
public health
industrial waste water
chemical oxygen demand
biological oxygen demand
Opis:
Wastewater treatment is becoming ever more critical due to diminishing water resources, increasing wastewater disposal costs, and stricter discharge regulations that have lowered permissible contaminant levels in waste streams. The ultimate goal of wastewater management is the protection of the environment in a manner commensurate with public health and socio-economic concerns. The aim of our study is to use natural occurring plant (Pistia stratiotes) to reduce the chemical oxygen demand and color from the industrial waste water. It was found that 120 mg/l of Chemical oxygen demand and 85 mg/l of color reduction was observed with Pistia stratiotes.
Źródło:
International Letters of Natural Sciences; 2014, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Matched-field Source Localization with a Mobile Short Horizontal Linear Array in Offshore Shallow Water
Autorzy:
Zhao, D.
Huang, Z.
Su, S.
Li, T.
Powiązania:
https://bibliotekanauki.pl/articles/177986.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
passive source localization
matched-field processing
inter-position processing
short horizontal array
shallow water
Opis:
Passive source localization in shallow water has always been an important and challenging problem. Implementing scientific research, surveying, and monitoring using a short, less than ten meter long, horizontal linear array has received considerable attention in the recent years. The short array can be conveniently placed on autonomous underwater vehicles and deployed for adaptive spatial sampling. However, it is usually difficult to obtain a sufficient spatial gain for localizing long-range sources due to its limited physical size. To address this problem, a localization approach is proposed which is based on matched-field processing of the likelihood of the passive source localization in shallow water, as well as inter-position processing for the improved localization performance and the enhanced stability of the estimation process. The ability of the proposed approach is examined through the two-dimensional synthetic test cases which involves ocean environmental mismatch and position errors of the short array. The presented results illustrate the localization performance for various source locations at different signal- to-noise ratios and demonstrate the build up over time of the positional parameters of the estimated source as the short array moves at a low speed along a straight line at a certain depth.
Źródło:
Archives of Acoustics; 2013, 38, 1; 105-113
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Abrasive Water-Jet Technology Waste and Its Processing Possibilities
Technologia obróbki Water-Jet i możliwości jej zastosowania
Autorzy:
Supolikova, G.
Cerny, J.
Gembalova, L.
Hlavacova, I. M.
Powiązania:
https://bibliotekanauki.pl/articles/318614.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Przeróbki Kopalin
Tematy:
water-jet wysokoenergetyczny
ścierny water-jet
materiał ścierny
recykling
separacja
high-energy water jet
abrasive water jet
abrasive material
recycling
separation
Opis:
The paper is dealing with the environmental research of waste material rising from abrasive water-jet cutting. On the occasion of disposal of the slurry from the overfull collector tank in the Laboratory of the Liquid jet of the Department of Physics at the Technical University of Ostrava the waste material was studied. Samples from different points of the catcher were collected into the beaks, dried up and consequently their elemental and structural composition has been analyzed. The results were primarily evaluated from the viewpoint of effectiveness of further abrasive recycling and usage (either as an abrasive - for this reason the residual cutting ability of the grains was discussed, or as a fine powder material for other applications – the size and shape of the grains was considered). Second viewpoint which was discussed was potential environmental hazard arising from the normal disposal of the waste material. The analysis of dried slurry samples was carried on by electron microprobe. Twenty one samples of waste mixture from various parts and depths of the tank were analyzed and compared with samples of non-used abrasive material. It was proved that abrasive material which had undergone the process of cutting was significantly impaired. It should be recycled in some cases but careful economic calculation taking into account all additional costs connected with separation of suitable abrasive fraction and its drying should be necessary. X-rays analysis provided information about chemical composition of the waste material. Most of the sludge was from abrasives, namely almandine. Higher contents of magnesium oxide, lower contents of aluminum oxide and higher contents of iron oxide, however, was probably caused by presence of other abrasive materials, such as olivine or zirconium which had been also used for cutting during the working period of the system. No potentially harmful material was detected by the X-ray analysis. It can be therefore stated that waste material from the water-jet cutting can be disposed on a common landfill without any restrictions.
Praca traktuje o badaniu środowiskowym odpadów powstałych po cięciu strumieniem wodno-ściernym (water-jet). Materiał przebadano przy okazji czyszczenia zawiesiny z przepełnionego zbiornika kolektora w laboratorium prowadzącym badania nad ciekłym strumieniem na Uniwersytecie Technicznym w Ostrawie. Próbki zostały pobrane z różnych punktów zbiornika do zlewek i osuszone. Następnie przeanalizowano ich skład pierwiastkowy i strukturalny. Wyniki przede wszystkim były oceniane pod kątem skuteczności dalszego recyklingu i użytku odpadów ściernych (zarówno jako materiał ścierny – z tego powodu badano zdolności tnące resztek ziaren oraz inne zastosowania tego materiału w postaci drobnego proszku, brano pod uwagę wielkość i kształt ziaren). Drugim aspektem badań było ryzyko środowiskowe wynikające z dotychczasowego sposobu usuwania odpadów. Analizę próbek osuszonej zawiesiny dokonano przy użyciu mikrosondy elektronowej. Poddano analizie 21 próbek mieszaniny odpadów z różnych części i głębokości pojemnika i porównano je z próbkami niezużytego materiału. Wykazano, że materiał ścierny, który był użyty do procesu cięcia został znacząco zniszczony. W niektórych przypadkach powinien zostać poddany recyklingowi, jednakże należy przeprowadzić dokładne wyliczenia ekonomiczne uwzględniające dodatkowe koszty dotyczące separacji części materiału oraz osuszania. Analiza rentgenowska dostarczyła informacji na temat składu chemicznego odpadu. Większość osadu pochodziła z materiałów ściernych, dokładniej almandynu. Niemniej jednak, zwiększone zawartości tlenku magnezu oraz tlenku żelaza i niższe zawartości tlenku glinu były prawdopodobnie spowodowane obecnością innych materiałów ściernych, tj. oliwinu czy cyrkonu, które również zostały wykorzystane do cięcia w czasie pracy. Analiza rentgenowska nie wykazała występowania żadnych potencjalnie niebezpiecznych materiałów. Można zatem stwierdzić, ze odpady powstałe z cięcia strumieniem wodno-ściernym (watrer-jet) można składować na standardowym wysypisku bez żadnych ograniczeń.
Źródło:
Inżynieria Mineralna; 2015, R. 16, nr 2, 2; 171-176
1640-4920
Pojawia się w:
Inżynieria Mineralna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the wastewater from chosen food processing industries on a quality of water in the mouth section of River Odra
Wpływ ścieków z wybranych zakładów przemysłu spożywczego na jakość wód powierzchniowych na terenie miasta Szczecina
Autorzy:
Wira, J.
Tarnowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/85105.pdf
Data publikacji:
2000
Wydawca:
Akademia Pomorska w Słupsku
Tematy:
waste water
food processing industry
water quality
mouth section
Odra River
waste water treatment plant
Szczecin city
biological treatment
sewage treatment
biological sewage treatment
Opis:
Influence of the wastewater from chosen food processing industries located in Szczecin on a quality of receiver’s water was presented. The theoretical part of the paper comprises general fundamentals of the biological treatment of the wastewater, the sources of the wastewater and their impact onto a sewerage system and the receiver at meat processing and dairy industries were also presented in this part of the paper. Szczecin Dairy and Szczecin Poultry Processing Company are both equipped with biological wastewater treatment plants. The treated wastewater is discharged to the receivers that are directly linked to River Odra, thus has an impact on the quality of River Odra water. Basing on a performed research on parameters of untreated and treated wastewater, the treatment performance of the wastewater treatment plants was described as well as an attempt to estimation of an impact of the wastewater onto the receiver was made.
W pracy został przedstawiony wpływ wybranych zakładów przemysłu spożywczego zlokalizowanych w Szczecinie na jakość wody w odbiorniku. Teoretyczna część pracy opisuje generalne zasady biologicznego oczyszczania ścieków, źródła ścieków w omawianych zakładach - przetwórstwa mięsnego i mleczarni, a także wpływ tych ścieków na odbiornik. Ścieki ze Szczecińskich Zakładów Drobiarskich „DROBIMEX-HEINTZ” oraz Szczecińskich Zakładów Mleczarskich są oczyszczane w biologicznych oczyszczalniach ścieków. Oczyszczone ścieki są odprowadzane do odbiorników bezpośrednio połączonych z rzeka Odra, w związku z czym maja wpływ na jakość jej wód. W oparciu o przeprowadzone badania parametrów nie oczyszczonych i oczyszczonych ścieków dokonano oceny w/w zakładów na jakość wody w rzece Odrze w jej ujściowym odcinku.
Źródło:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 2000, 04
1643-0115
Pojawia się w:
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of filtering methods, filter processing and DNA extraction kits for detection of mycobacteria in water
Autorzy:
Kaevska, M.
Slana, I.
Powiązania:
https://bibliotekanauki.pl/articles/52141.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2015, 22, 3
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of water quality change on copper flotation
Autorzy:
Acuña, Claudio
Aedo, Camila
Leiva, Claudio
Flores, Víctor
Powiązania:
https://bibliotekanauki.pl/articles/29552039.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
flotation
copper
molybdenum
water quality
wastewater
Opis:
Given the significant consumption and future demand for water resources, this paper intends to find the conditions for using a flotation process with different water quality. One of the alternatives is using water under secondary treatment with industrial water mixtures to partly recycle domestic wastewater and maximize metallurgical benefits. Results show that using wastewater (only with secondary treatment) in flotation is detrimental to copper recovery. However, molybdenum recovery is significantly improved. For mixtures with 50 [%] wastewater, 50 [ppm] frother, 20 [ppm] collector, and pH 10, copper recovery decrease amounts to 0.4 [%], while molybdenum shows a 2.4 [%] recovery increase. In addition, copper concentrate grade decreases by 1.4 [%], while molybdenum grade remains. Therefore, using wastewater is viable, particularly in the case of molybdenum. So, this study proposes using of water mixtures in the copper depression stage to improve molybdenum recovery.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 186190
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-Criteria Decision Making of Abrasive Water Jet Machining Process for 2024-T3 Alloy Using Hybrid Approach
Autorzy:
Khudhir, Waqass S.
Abbood, Mohanad Qusay
Shukur, Jalil J.
Powiązania:
https://bibliotekanauki.pl/articles/2204890.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
TOPSIS
entropy
image processing
abrasive water jet machining
Opis:
Abrasive Water Jet Machining (AWJM) is one of the most environmentally friendly non-conventional machining processes, which can be employed to cut hard and thin materials without any thermal effects. In this study, the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) has been combined with the Entropy method and employed to find out the multi-criteria decision-making of process parameters. Experimental investigations have been conducted to evaluate the performance of the AWJM process in terms of surface roughness (Ra) and kerf angle (Ka). The selected process parameters are a stand-off distance (SOD), traverse speed (TS), and abrasive flow rate (AFL), whereas the AL-alloy 2024-T3 was selected as the work piece material. The image process technique has been utilized to measure the values of the Ka. The results demonstrate that the optimal solutions of the AWJM process, which give the smallest value of Ra and minimizes Ka, are 2mm, 20mm/min, and 100 g/min, for SOD, TS, and AFL respectively.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 155--162
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of environmental issues in textile industries and recent wastewater treatment technology
Autorzy:
Mondal, Prasenjit
Baksi, Soumyadeep
Bose, Debajyoti
Powiązania:
https://bibliotekanauki.pl/articles/1178718.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
wet processing
water pollution
advanced oxidation
Opis:
Textile industries are the major source of environmental pollution In terms of quality as well as quantity. The textile industries consume large quantities of water (200 m3/ton of product) out of which around 90% is appeared as wastewater. Textile wastewater contains dye as the major pollutant which is not only recalcitrant but also imparts intense color to the waste effluent. Improper disposal of textile wastewater causes serious environmental problems affecting the aquatic organism adversely. The present study deals with the detailed study of environmental issues and treatment options. The industry generates huge amount of wastewater contains toxic pollutants. Several treatment technologies are using now days with high efficiency and from the present study it was found that advanced oxidation process is very effective in terms of pollutants removal efficiency as well as cost requirement.
Źródło:
World Scientific News; 2017, 61, 2; 98-109
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of different process water sources on rougher flotation efficiency of a copper ore : A case study at Sarcheshmeh Copper Complex (Iran)
Autorzy:
Soufiabadi, Amir Mousa
Nejadaria, Milad
Dehghan, Reza
Safari, Mehdi
Hassanzadeh, Ahmad
Khoshdast, Hamid
Powiązania:
https://bibliotekanauki.pl/articles/29552036.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
process water
copper flotation
recycled water
metallurgical efficiency
fine suspended
solid
Opis:
In this research, the effect of different sources of process water on the flotation efficiency of copper sulfide ore prepared from the Sarcheshmeh copper mine was investigated. For this purpose, samples of fresh water to the plant, overflows of copper-molybdenum concentrate thickener, copper concentrate thickener, and recycled water pool as well as a mixture of fresh water and recycled water were prepared and characterized. Flotation tests were performed under the same conditions as the plant’s rougher circuit and were kept constant during all experiments. Grade and recovery of copper, iron, molybdenum, and silica were selected as the metallurgical response of flotation tests. The results were subjected to statistical analysis to assess the relative significance of which water source affects the flotation performance as evaluated from the experimental results. The results showed that the copper concentrate thickener overflow had the greatest effect on the flotation efficiency, so the grade and recovery decreased by about 10% and 75% for copper, and 10% and 6% for iron in the concentrate, respectively, while the grade and recovery increased up to 0.1% and 12% for silica, and 3% and 25% for molybdenum, respectively. The reason for this effect was attributed to the high content of suspended solid particles, and Cu2+, Mo2+, and Fe2+ cations in this water source that increased the coating effect over gangue minerals and entrainment rate. The improvement of molybdenum flotation was also ascribed to the possible presence of residual diesel oil from the flotation process in the plant. Due to the relatively equal amount in all sources of process water, the effect of anions and ions of dissolved salts was difficult.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 184087
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On-water video surveillance: data management for a ship identification system
Autorzy:
Popik, Adrian
Zaniewicz, Grzegorz
Wawrzyniak, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/134912.pdf
Data publikacji:
2019
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
video surveillance
cameras
image
processing
ship identification
River Information Services
Opis:
Video surveillance on both marine and inland waters still only plays a mainly auxiliary role in vessel traffic observation and management. The newest technical achievements in visual systems allow camera images to be used in more sophisticated tasks, such as automatic vessel recognition and identification in observed areas. With the use of deep learning algorithms and other artificial intelligence methods, such as rough sets and fuzzy sets, new functions can be designed and implemented in monitoring systems. In this paper the challenges that were encountered and the technology that has been developed in managing video streams are presented as well as the images needed for tests and proper operation of the designed Ship Recognition and Identification System (SHREC). The current technologies, typical setups and capabilities of cameras, with regard to existing on-water video monitoring systems, are also presented. The aspects of collecting the test data in the Szczecin Water Junction area are also described. The main part of the article focuses on presenting the video data pre-processing, storing and managing procedures that have been developed for the purposes of the SHREC system.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 60 (132); 56-63
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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