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Tytuł:
Effect of Using Various Cathode Materials (Carbon Felt, Ni-Co, Cu-B, and Cu-Ag) on the Operation of Microbial Fuel Cell
Autorzy:
Włodarczyk, Paweł P.
Włodarczyk, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/27314860.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
bioelectricity
microbial fuel cell
MFC
cathode materials
bioelectrochemical system
COD reduction
renewable energy sources
bioelektryczność
mikrobiologiczne ogniwo paliwowe
materiały katodowe
system bio-elektrochemiczny
redukcja ChZT
odnawialne źródła energii
Opis:
Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on the process rate of the electrodes. In MFC, the microorganisms are the catalyst of anode, and the cathode is usually made of carbon material. To increase the MFC efficiency it is necessary to search the new cathode materials. In this work, the electricity production from yeast wastewater in membrane-less microbial fuel cells with a carbon felt, Ni-Co, Cu-B, and Cu-Ag cathodes has been analyzed. In the first place, the measurements of the stationary potential of the electrodes (with Cu-Ag catalyst obtained by the electrochemical deposition technique) were performed. Next, the analysis of the electric energy production during the operation of the membrane-less microbial fuel cell (ML-MFC). The highest parameters were obtained for the Ni-Co and Cu-Ag catalysts. The cell voltage of 607 mV for Ni-Co and 605 mV for Cu-Ag was obtained. Additionally, the power of 4.29 mW for both cathodes - Ni-Co and Cu-Ag was obtained. Moreover, Ni-Co and Cu-Ag allow the shortest time of COD reduction. Based on the test results (with selected MFC design, wastewater, temperature, etc.), it can be concluded that of all the analyzed electrodes, Cu-Ag and Ni-Co electrodes have the best parameters for use as cathodes in ML-MFC. However, based on the results of this study, it can be concluded that all the tested electrodes can be used as cathode material in MFC.
Źródło:
Civil and Environmental Engineering Reports; 2023, 33, 4; 95--105
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feeding a Membrane-less Microbial Fuel Cell by Mixed Municipal and Industrial Wastewater
Autorzy:
Włodarczyk, Barbara
Włodarczyk, Paweł P.
Powiązania:
https://bibliotekanauki.pl/articles/27314862.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
bioelectricity
bioenergy
microbial fuel cell
MFC
municipal wastewater
industrial wastewater
renewable energy sources
COD reduction
environmental protection
bioelektryczność
bioenergia
mikrobiologiczne ogniwo paliwowe
ścieki komunalne
ścieki przemysłowe
odnawialne źródła energii
Redukcja ChZT
ochrona środowiska
Opis:
Due to the constant growth of the world's population, the amount of generated wastewater is also constantly increasing. One of the devices that can use wastewater as a raw material for energy production is a microbial fuel cell (MFC). MFCs technology is constantly evolving. However, to increase its use, it is necessary to improve its efficiency. There are various possibilities to ensure this, such as the use of new electrode materials, new cell designs, or the use of wastewaters from different sources. In this paper the analysis of MFC operation (cell voltage, power, and current density) fed by mixed municipal and industrial wastewaters was shown. Moreover, the change in time of COD was analyzed. Due to cost reduction the membrane-less microbial fuel cell (ML-MFC) was chosen. It was noted that the addition of concentrated process wastewater increases the COD reduction time in the ML MFC. An increase of generated bioelectricity during fed ML-MFC by mixed municipal and industrial (process wastewater from yeast production) wastewater was demonstrated. The highest values of average cell voltage (598 mV), maximum power (4.47 mW) and maximum current density (0.26 mA•cm-2) were obtained for a 10% share of yeast process wastewater in the mixed wastewater, which fed the ML-MFC.
Źródło:
Civil and Environmental Engineering Reports; 2023, 33, 4; 50--62
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance evaluation of nanofiltration membranes for dye removal of synthetic hand-drawn batik industry wastewater
Autorzy:
Desiriani, Ria
Susanto, Heru
Aryanti, Nita
Powiązania:
https://bibliotekanauki.pl/articles/2057617.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COD
water filtration
nanofiltration
NF
batik industry
ChZT
filtracja wody
nanofiltracja
batik przemysłowy
Opis:
This study evaluated the performance of nanofiltration (NF) membrane for the treatment of hand-drawn batik wastewater containing synthetic dyes as well as real batik wastewater. Three commercial NF membranes (NF270, TS40 and XN45) were used. The effect of transmembrane pressure, NF membrane types, synthetic dyes concentration, and solution types on flux and rejection were investigated. The results showed that the use of all NF membranes could reach dye removal of ca. 99%. NF270 membrane exhibited the highest flux, 2–3 times higher than that of TS40 and XN45 membranes. NF270 membrane was further used for treating real batik wastewater. The results showed high rejections in terms of total suspended solids (TSS), chemical oxygen demand (COD), and total dissolved solids (TDS) were obtained. The practical applicability of NF270 membrane for real handdrawn batik wastewater treatment fulfilled the quality standards in terms of TSS, COD, and BOD parameters. Overall, the NF270 membrane showed favorable performance for batik effluent treatment.
Źródło:
Environment Protection Engineering; 2022, 48, 1; 51--68
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioremediation of fluazifop-p-butyl herbicide by some soil bacteria isolated from various regions of Turkey in an artificial agricultural field
Autorzy:
Erguven, Gokhan Onder
Nuhoglu, Yasar
Powiązania:
https://bibliotekanauki.pl/articles/2032953.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
soil bacteria
COD
bioremediation
bakterie glebowe
ChZT
bioremediacja
Opis:
The bioremediation rate of fluazifop-p-butyl (C19H20F3NO4) was monitored. Bacteria were isolated in agricultural soil samples. Fifteen sterilised glass jars were inoculated with 2, 5, 10, 20 cm3 of a homogenised bacterial mixture (109 CFU/cm 3), then sterile agricultural soil and 60 μg of fluazifop-p-butyl (in liquid form) were added to each jar. Each week, filtrated water drained from bottles was analysed for fluazifop-p-butyl concentration, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC). Additionally, pH and dissolved oxygen concentration were monitored. The highest biodegradation rate was observed in the soil sample containing 20 cm 3 of the culture media. In this media, fluazifop-p-butyl, COD, BOD5 and TOC removals were measured as 91, 83, 96 and 86%, respectively, at the end of the 2 months. The DO level was measured between 3 and 6 mg O2/dm 3 in the first month for all cultures. An increase of pH was recorded during the first month and after this time a pH decrease was noted.
Źródło:
Environment Protection Engineering; 2020, 46, 3; 5-15
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of persulfate, peroxide activated persulfate and permanganate oxidation on treatability and biodegradability of leachate nanofiltration concentrate
Autorzy:
Guvenc, Senem Yazici
Varank, Gamze
Demir, Ahmet
Powiązania:
https://bibliotekanauki.pl/articles/2032960.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COD
nanofiltration
NF
ChZT
nanofiltracja
Opis:
The effects of persulfate (PS), peroxide activated persulfate (P-PS) and permanganate (PM) oxidation processes on leachate nanofiltration (NF) concentrate treatment have been activated. Additionally, COD fractions were determined and compared before and after each oxidation process. The total COD removal efficiencies by the oxidation processes using PS, P-PS, and PM as the oxidants were determined to be 24.5%, 32.9%, and 39.5%, respectively. The biodegradable COD fraction increased from 6.37% to 9.25%, 11.51%, and 13.64% after the PS, P-PS, and PM oxidation processes, respectively. About 25%, 34%, and 46% removal efficiencies of the inert COD content of the concentrate were obtained after the PS, P-PS and PM oxidation processes, and the soluble COD fraction increased from 71.1% to 87.2%, 89.0% and 84.6% by the PS, P-PS and PM oxidation processes, respectively. Although the highest removal efficiencies were achieved by PM oxidation with the lowest operational cost, all of the processes may be suggested as efficient methods for conversion of insoluble COD into the soluble COD fraction and for inert COD removal. The results of the study showed that the PS, P-PS, and PM oxidation processes may be effectively utilized as post-treatment techniques for leachate NF concentrate treatment.
Źródło:
Environment Protection Engineering; 2020, 46, 3; 97-108
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations on the effectiveness of wastewater purification in medium sand with assisting opoka rock layer
Autorzy:
Kalenik, Marek
Chalecki, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2032948.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
drainage
infiltration
medium grain sand
BOD5
COD
treated sewage
drenaż
infiltracja
piasek średnioziarnisty
BZT5
ChZT
ścieki oczyszczone
Opis:
The objective of the undertaken investigations was to examine in laboratory conditions whether an introduction of an assisting opoka rock layer with the granulation of 1–6 mm into the ground improves the removal efficiency of nitrogen and phosphorus compounds from domestic sewage. The performed investigations concerned the layer supporting the removal efficiency of domestic sewage in a home sewage treatment plant under infiltration drainage. The model investigations of wastewater purification were carried out in a medium sand bed with an assisting, 0.10 and 0.20 m thick opoka rock layer. The effectiveness of wastewater purification related to basic qualitative indicators (total suspended solids – TSS, BOD5, COD, total nitrogen, total phosphorus) was in line with the Polish standards on sewage disposal into grounds and surface water. The medium sand soil bed with the 0.20 m thick assisting opoka rock layer showed higher effectiveness of wastewater purification than that 0.10 m thick. The application of the 0.20 m thick opoka rock layer increased the removal efficiency regarding TSS by 6.2%, total nitrogen by 20.4%, ammonium nitrogen by 8.3% and total phosphorus by 2.9%, and removal efficiency regarding BOD5 by 1.2% and COD by 1.9% with relation to the 0.10 m thick assisting layer (all percentages − in average). The results confirm that the natural opoka rock with the granulation of 1–6 mm can be used to assist in the removal of nitrogen and phosphorus compounds from wastewater with the application of infiltration drainage.
Źródło:
Environment Protection Engineering; 2021, 47, 1; 53-65
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of processing whey waste from dairies. A review
Autorzy:
Ponist, Juraj
Dubsikova, Veronika
Schwarz, Marian
Samesova, Dagmar
Powiązania:
https://bibliotekanauki.pl/articles/2032849.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
whey
aerobic process
dairy waste
BOD
COD
serwatka
proces tlenowy
odpady z mleczarni
ChZT
BZT
Opis:
The purpose of the study was to evaluate the methods of processing whey. The valorization method is suitable for the use of cheese whey and whey permeate to produce beverages with or without microbial conversion. However, this method does not ensure microbial conversion of lactose. Therefore, the organic load will not be reduced. The main advantage of aerobic decomposition is the relatively rapid degradation of organic matter. However, the high organic load in the crude cheese whey makes aerobic decomposition unsuitable and restrictions on oxygen transport may occur. Anaerobic decomposition can be used in various areas for the treatment of waste with a high organic load. The disadvantage of anaerobic processes is a higher cost compared to aerobic treatment. The combination of individual technologies significantly reduces the hydraulic retention time of the aerobic process and improves waste treatment. At present, there is a lack of studies in this area.
Źródło:
Environment Protection Engineering; 2021, 47, 4; 67-84
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Poles’ Lifestyle on the Quantity and Quality of Municipal Wastewater
Autorzy:
Płuciennik-Koropczuk, Ewelina
Myszograj, Martyna
Myszograj, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/2051694.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
municipal wastewater
wastewater characteristics
biodegradability
COD fractionation
PPCPs
ścieki komunalne
charakterystyka ścieków
biodegradowalność
frakcjonowanie ChZT
Opis:
The article presents lifestyle as an important factor determining the quantity and quality of municipal wastewater. The characteristic of wastewater in Poland has changed significantly in recent years. The qualitative characteristics of municipal wastewater indicate an increase of organic compounds and in the scope of micro-contaminants identified in them, e.g. nanoparticles, microplastics, pharmaceutical and personal care products or heavy metals. Therefore, the knowledge of parameters such as: BOD5, COD, total N, total P and suspension solids is no longer sufficient for the design and operation of wastewater treatment systems. Comprehensive research in this area is necessary to select those indicators that better describe the characteristics of wastewater.
Źródło:
Civil and Environmental Engineering Reports; 2021, 31, 3; 265-275
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorption of reactive dyes and their mixtures on activated carbon. Kinetics, equilibrium and thermodynamic evaluation
Autorzy:
Kouhail, Meriem
Elahmadi, Zakia
Benayada, Abbes
Dewil, Raf
Powiązania:
https://bibliotekanauki.pl/articles/206912.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption efficiency
adsorption kinetics
Langmuir isotherm
reactive dye
COD
efektywność adsorpcji
kinetyka adsorpcji
izoterma Langmuira
barwnik reaktywny
ChZT
Opis:
The adsorption of three reactive dyes (Reactive Bezactiv Yellow (RBY), Reactive Bezactiv Blue (RBB) and Reactive Bezactiv (RBR)) on a commercially available activated carbon (CAC) has been evaluated. It was shown that CAC is capable to effectively remove these dyes from a solution. The adsorption increased with higher contact time, adsorbent dose, and initial dye concentration. The data indicated that the adsorption kinetics of dyes on CAC followed a pseudo-second order model. The adsorption isotherms followed the Langmuir isotherm model. Evaluation of thermodynamic parameters revealed that the adsorption process is endothermic for all dyes and spontaneous in a single system and became spontaneous in mixture systems at high temperature, expect RBY and RBB in the ternary mixture. Adsorption was higher for RBY, followed by RBB, and was lowest for RBR. The total adsorption efficiency was confirmed by chemical oxygen demand (COD) measurements.
Źródło:
Environment Protection Engineering; 2020, 46, 2; 5-24
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the Possibility of Introducing a Cogeneration System in the Biogas Development Process by the Example of the Wastewater Treatment Plant Located in Rybnik Orzepowice
Ocena możliwości wprowadzenia układu kogeneracji w procesie zagospodarowania biogazu na przykładzie oczyszczalni ścieków w Rybniku Orzepowicach
Autorzy:
Karwot, Janusz
Bondaruk, Jan
Zawartka, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/1811646.pdf
Data publikacji:
2020
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
biogas
cogeneration
heat
electricity
COD load
BZT5 load
biogaz
kogeneracja
ciepło
energia elektryczna
ładunek ChZT
ładunek BZT5
Opis:
The paper presents and discusses the 6-year effects of the operation of a biogas-fired cogeneration system which operates at the Rybnik Orzepowice sewage treatment plant. The qualitative composition of biogas, average daily amount of biogas produced, total demand of the sewage treatment plant for electricity and the amount of electricity obtained from biogas were presented. Regarding the average daily biogas production for the years 2013–2018, it can be stated that it remains at the level of 2,809 m3/d (±33%). The average daily total electricity consumption for 2013-2018 remains at 8,846 kWh/d (-13.8%; +20.6%). The average daily amount of electricity produced from biogas for the years 2013-2018 remains at the level of 3,892 kWh/d (-38.7%; +10.1%). Electricity generated from biogas allows us to cover the demand of the treatment plant at 44% (minimum 39%, maximum 50%). In the analysed period, biogas consumption by individual facilities was: cogeneration unit approx. 65%, boilers: 10%, flare: 25%. Based on the operational data, it was calculated that: the unit indicator for biogas extraction from sewage, on average is 0,1584 mn3/m3 (min. 0,0937 mn3/m3, max.: 0,2291 mn3/m3), the unit indicator for biogas extraction in relation to for COD load an average of 0.22 m3of biogas/kg COD (min. 0.09 m3of biogas/kg COD, max. 0.47 m3of biogas/kg COD), the unit ratio of biogas extraction in relation to the BZT5 load was on average 0.61 m3biogas/kg BZT5 (min. 0.28 m3biogas/kg BZT5, max. 1.20 m3biogas/kg BZT5).
W artykule przedstawiono i omówiono 6-cio letnie efekty pracy układu kogeneracyjnego zasilanego biogazem, który pracuje w Oczyszczalni Ścieków Rybnik Orzepowice. Zaprezentowano skład jakościowy biogazu, średniodobową ilość wytwarzanego biogazu, całkowite zapotrzebowanie oczyszczalni na energię elektryczną oraz ilość energii elektrycznej uzyskiwanej z biogazu. Średniodobowa produkcji biogazu, za lata 2013-2018 można stwierdzić, że utrzymuje się ona na poziomie 2,809 m3/d (±33%). Średniodobowe całkowite zużycie energii elektrycznej za lata 2013–2018, utrzymuje się on poziomie 8,846 kWh/d (-13,8%; +20,6%). Średniodobowa ilość produkowanej energii, energii elektrycznej z biogazu za lata 2013–2018 utrzymuje się on poziomie 3,892 kWh/d (-38,7%; +10,1%). Energia elektryczna wytwarzana z biogazu pozwala na pokrycie zapotrzebowania oczyszczalni na poziomie 44% (minimalnie 39%, maksymalnie 50%). W analizowanym okresie zużycie biogazu przez poszczególne obiekty wynosiło: jednostka kogeneracyjna ok. 65%, kotły: 10%, pochodnia: 25%. Na podstawie danych eksploatacyjnych obliczono, że: jednostkowy wskaźnik pozyskania biogazu ze ścieków, średnio wynosi 0,1584 mn3/m3 (min. 0,0937 mn3/m3, max.: 0,2291 mn3/m3), jednostkowy wskaźnik pozyskania biogazu w odniesieniu do ładunku ChZT średnio wynosił 0,22 m3 biogazu/kg ChZT (min. 0,09 m3 biogazu/kg ChZT, max. 0,47 m3 biogazu/kg ChZT), jednostkowy wskaźnik pozyskania biogazu w odniesieniu do ładunku BZT5 średnio wynosił 0,61 m3 biogazu/kg BZT5 (min. 0,28 m3 biogazu/kg BZT5 w, max. 1,20 m3 biogazu/kg BZT5).
Źródło:
Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 2; 1116-1131
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of zero-valent iron and enzymes on the anaerobic co-digestion of sewage sludge and corn silage
Autorzy:
Zhou, Haidong
Cao, Zhengcao
Ying, Zhenxi
Liu, Jicheng
Hu, Tao
Zhang, Mingquan
Zhang, Jingyuan
Powiązania:
https://bibliotekanauki.pl/articles/2032872.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
corn silage
COD
sewage sludge
anaerobic digestion
kiszonka z kukurydzy
ChZT
osad ściekowy
beztlenowa fermentacja
Opis:
Anaerobic co-digestion of sewage sludge and corn silage with zero-valent iron powder (Fe0), cellulase, and papain as reinforcement means was conducted. COD-based feeding ratio of sewage sludge to corn silage was set to 2:1, the solids retention time (SRT) 20 day, digestion temperature 35 °C, and mixing speed 60 rpm. Removal rates of total COD during the control group, and Fe0, papain, cellulase, and papain, Fe0, and the two kinds of enzyme-added tests were 38.04, 41.02, 34.62, 34.55, 35.42, and 48.21%, respectively. The corresponding biogas production was 2.12, 2.62, 2.22, 2.41, 2.25, and 2.81 dm3/day, respectively. The results indicated the addition of cellulase, and papain could maximize the decomposition and hydrolysis of organic matter in sewage sludge and corn silage to volatile fatty acids. Fe0 could reduce the redox potentials of the anaerobic co-digestion, optimize the circumstances of the methanogenesis stage, accelerate biogas production, and improve biogas components. Fe0 and enzymes played a synergistic role in the anaerobic co-digestion system. Life cycle assessment indicated that the anaerobic co-digestion of sludge and corn silage co-substrates could benefit the economy, environment, and social development under the synergistic action of Fe0 and enzymes.
Źródło:
Environment Protection Engineering; 2020, 46, 4; 41-56
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of zero-valent iron and enzymes on the anaerobic co-digestion of sewage sludge and corn silage
Autorzy:
Zhou, Haidong
Cao, Zhengcao
Ying, Zhenxi
Liu, Jicheng
Hu, Tao
Zhang, Mingquan
Zhang, Jingyuan
Powiązania:
https://bibliotekanauki.pl/articles/2032890.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
corn silage
COD
sewage sludge
anaerobic digestion
kiszonka z kukurydzy
ChzT
osad ściekowy
beztlenowa fermentacja
Opis:
Anaerobic co-digestion of sewage sludge and corn silage with zero-valent iron powder (Fe0), cellulase, and papain as reinforcement means was conducted. COD-based feeding ratio of sewage sludge to corn silage was set to 2:1, the solids retention time (SRT) 20 day, digestion temperature 35 °C, and mixing speed 60 rpm. Removal rates of total COD during the control group, and Fe0, papain, cellulase, and papain, Fe0, and the two kinds of enzyme-added tests were 38.04, 41.02, 34.62, 34.55, 35.42, and 48.21%, respectively. The corresponding biogas production was 2.12, 2.62, 2.22, 2.41, 2.25, and 2.81 dm3/day, respectively. The results indicated the addition of cellulase, and papain could maximize the decomposition and hydrolysis of organic matter in sewage sludge and corn silage to volatile fatty acids. Fe0 could reduce the redox potentials of the anaerobic co-digestion, optimize the circumstances of the methanogenesis stage, accelerate biogas production, and improve biogas components. Fe0 and enzymes played a synergistic role in the anaerobic co-digestion system. Life cycle assessment indicated that the anaerobic co-digestion of sludge and corn silage co-substrates could benefit the economy, environment, and social development under the synergistic action of Fe0 and enzymes.
Źródło:
Environment Protection Engineering; 2020, 46, 4; 41-56
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of integrated UFCW-MFC reactor for azo dye wastewater treatment and simultaneous bioelectricity generation
Autorzy:
Zou, Haiming
Chu, Lin
Wang, Yan
Powiązania:
https://bibliotekanauki.pl/articles/207646.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COD
UFCW-MFC
methyl orange
wastewater
ChZT
oranż metylowy
oczyszczanie ścieków
Opis:
An up-flow constructed wetland (UFCW) incorporating a novel membrane-less air-cathode single-chamber microbial fuel cell (MFC) was designed to treat dye wastewater and simultaneously generate bioelectricity. The performance of UFCW-MFC was evaluated via Methyl Orange (MO) and chemical oxygen demand (COD) removal rates and the output voltage. For comparison, the performance of a single UFCW was also assessed. A repeatable and stable voltage output of about 0.44±0.2 V was obtained in UFCW-MFC. The MO and COD removal rates in UFCW-MFC were 93.5 and 57.2%, respectively, significantly higher than those in single UFCW (75.4 and 42.6%, respectively), suggesting the obvious enhancement of electrodes on MO and COD removal. The anode zone of UFCW-MFC made the most contribution to MO and COD removal compared with other layers. The oxidation-reduction potential (ORP) and dissolved oxygen (DO) profiles showed that the anaerobic environment was well developed in the lower part of UFCW-MFC (0–24 cm) and the upper part (41–42 cm) had a good aerobic environment, thus greatly contributing to the MO anaerobic reduction and aerobic degradation of breakdown products. These results obtained here suggest that the UFCW-MFC may provide an effective alternative for the treatment of dye wastewater and simultaneous bioelectricity generation.
Źródło:
Environment Protection Engineering; 2020, 46, 1; 63-72
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photochemical oxidation model of organic pollutants in greywater from a small household
Autorzy:
Bielski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/207989.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COD
greywater
small household
ChZT
woda szara
małe gospodarstwo domowe
Opis:
The treatment of coagulated greywater from a small household was investigated. The processes of oxidation of organic compounds with hydrogen peroxide combined with ultraviolet radiation (H2O2/m3/UV) was described. Greywater with various initial COD and TOC concentrations was used in the H2O2/m3/UV process. The process parameters were hydrogen peroxide doses 0.5–4.0 kg H2O2/m3, UV (254 nm) light intensity 75.5 W/m2 and irradiation time – 1 h. The oxidation efficiency varied broadly from 15 to 98% and higher COD values corresponded to lower oxidation efficiencies. The average hydrogen peroxide consumption per kg of COD w was = 12.2 g H2O2/m3/g O2 COD, while per TOC it was w′ = 69.0 g H2O2/m3/g C. The experiments enabled one to developed mathematical models for coagulation and oxidation kinetics. The models showed that at the initial COD = 859 g O2/m3, the coagulant dose of 100 g Al3+/m3, the hydrogen peroxide dose of 4 kg H2O2/m3 and the UV irradiation time of 3 h it is possible to decrease the COD by 98.4%.
Źródło:
Environment Protection Engineering; 2020, 46, 1; 91-115
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon and nutrient removal from domestic wastewaters in a modified 5-stage Bardenpho process via fuzzy modeling approach
Autorzy:
Manav Demir, Neslihan
Yildirim, Asuman
Coskun, Tamer
Balcik Canbolat, Cigdem
Debik, Eyup
Powiązania:
https://bibliotekanauki.pl/articles/208121.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fuzzy logic
COD
carbon
Bardenpho process
municipal wastewaters
logika rozmyta
ChZT
węgiel
process Bardenpho
ścieki komunalne
Opis:
Gradual increase in the generation of wastewater results from the increasing global population. Thus, new treatment techniques and systems for controlling the treatment process depending on wastewater characteristics are desirable. This paper presents the use of a pilot-scale modified five-stage Bardenpho process with a 10 m3/day capacity for the treatment of real municipal wastewater. The process was developed for this study, and the steady-state removal efficiencies for COD (chemical oxygen demand), TKN (total Kjeldahl nitrogen), NH4+-N (ammonium nitrogen), PO43--P (phosphate phosphoms), SS (suspended solids), and VSS (volatile suspended solids) were 87±5%, 86±12%, 93±14%, 89±9%, 88±8%, 94±4%, and 94±4%, respectively. In the study, the effluent COD, TKN, and TP concentrations were also estimated using a fuzzy logic approach. The results showed that coefficients of determination are higher than 0.80 suggesting that the presented fuzzy logic approach may confidently be used for the estimation of the treatment performance.
Źródło:
Environment Protection Engineering; 2019, 45, 1; 5-16
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
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