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Abattoir wastewater treatment and energy recovery using a ferricyanide-catholyte microbial fuel cell.

100%
Akaluka C. K., Orji J. C., Braide W., Egbadon E. O., Adeleye S. A.
International Letters of Natural Sciences
|
2016
|
tom 55
The capacity of Microbial fuel cells (MFCs) to produce voltage and concurrently treat abattoir waste water was investigated in MFCs that used 0.1M potassium ferricyanide (K3[Fe(CN)6] as catholytes. Physicochemical, electrochemical and Microbiological properties of the MFCs were monitored. The open circuit voltage (OCV) readings were taken at 3 hours interval and maximum OCV of 965mV was recorded. Also, The physicochemical characteristics of the MFCs revealed that the pH decreased by 0.2 after treatment; Chemical Oxygen demand, biochemical oxygen demand, total suspended solids, ammonia, and total nitrogen reduced by 88.4%, 65.56%, 43.88%, 60% and 60% respectively. However, Phosphate increased by 54%. The bacterial isolates from the raw abattoir wastewater were Staphylococcus aureus, Bacillus cereus, Bacillus subtilis, Enterococcus faecalis, Enterobacter aerogenes, Escherichia coli and Micrococcus luteus while Enterococcus faecalis, Bacillus cereus and Escherichia coli were isolated from the biofilms on the anode. Microbial fuel cells therefore have capacities for simultaneous waste water treatment and electricity generation.
2

Energy recovery from waste of printed circuit boards in plasmatron plasma reactor

86%
Szalatkiewicz J.
Polish Journal of Environmental Studies
|
2014
|
tom 23
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nr 1
This paper presents results of research on the use of plasma technology for printed circuit boards (PCB) processing for metals and energy recovery. In the Industrial Research Institute for Automation and Measurements, a test stand was built allowing experiments on plasma process with throughput of 800 kg per day. Brief examination of PCB waste was carried out, focusing on identification of its heating value and composition of organic substances including C, H, O, S, and Br. Heat balance of the process is presented, including energy supplied by plasma, chemical energy released by incineration of PCB waste, heat carried out with molten metal and slag, heat carried out with exhaust fumes, and heat losses of the apparatus. Also, the incineration process is described focusing on air demand and its efficiency due to incomplete burning of the organic substances in the reactor. The presented process in total consumes 66 kW of electrical energy, and allows recovery of 117 kW of heat energy from exhaust fumes.
3

Qualitative and environmental aspects of the use of industrial waste from plant processing

72%
Rypinska I., Bieganska M.
Towaroznawcze Problemy Jakości. Polskie Towarzystwo Towaroznawcze
|
2013
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nr 4
4
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The analysis of possibility of energy recovery during convective drying of paprika

72%
Rudy S., Krzykowski A., Dziki D., Kozak P., Serwatka Z.
Teka Komisji Motoryzacji i Energetyki Rolnictwa
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2011
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tom 11C
5

Role of primary sludge hydrolysis in energy recovery from municipal wastewater sludge

72%
Rybicki S. M.
Polish Journal of Environmental Studies
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2014
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tom 23
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nr 3
Laboratory experiments supported by full-scale operational observations have been utilized to assess the possible yield of methane-rich biogas via decomposition of COD and volatile fatty acids (VFAs) from organic matter trapped and settled in a municipal wastewater treatment plant. The impact of operational conditions (mainly solids' retention time) on VFAs and methane-rich gas generation was estimated by fractionation of COD in sludge and supernatant. Assessment of efficiency of this process was done by steady state measurements of COD solubilization. Full-scale investigations supported by laboratory tests enlightened some specific operational problems that may occur in wastewater treatment plants with an intensive acidic hydrolysis. Relatively high consumption of biodegradable carbon is usually one of adverse and unfavorable effects.
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