Maximizing Coulombic recovery and solids reduction from primary sludge by controlling retention time and pH in a flat-plate microbial electrolysis cell

2017 ◽  
Vol 3 (2) ◽  
pp. 333-339 ◽  
Author(s):  
Dongwon Ki ◽  
Prathap Parameswaran ◽  
Sudeep C. Popat ◽  
Bruce E. Rittmann ◽  
César I. Torres
Keyword(s):  
Flat Plate ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Electrolysis Cell ◽  
Anode Chamber ◽  
Microbial Electrolysis Cell ◽  
Primary Sludge ◽  
Sludge Stabilization ◽  
Microbial Electrolysis

Control of hydraulic retention time and pH of the anode chamber in a flat-plate microbial electrolysis cell can improve Coulombic recovery and sludge stabilization.

scholarly journals Optimising the Hydraulic Retention Time in a Pilot-Scale Microbial Electrolysis Cell to Achieve High Volumetric Treatment Rates Using Concentrated Domestic Wastewater

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2945 ◽  
Author(s):  
Daniel D. Leicester ◽  
Jaime M. Amezaga ◽  
Andrew Moore ◽  
Elizabeth S. Heidrich
Keyword(s):  
Retention Time ◽  
Hydraulic Retention Time ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Direct Analysis ◽  
Pilot Scale ◽  
Electrolysis Cell ◽  
Treatment Technique ◽  
Microbial Electrolysis Cell ◽  
Microbial Electrolysis

Bioelectrochemical systems (BES) have the potential to deliver energy-neutral wastewater treatment. Pilot-scale tests have proven that they can operate at low temperatures with real wastewaters. However, volumetric treatment rates (VTRs) have been low, reducing the ability for this technology to compete with activated sludge (AS). This paper describes a pilot-scale microbial electrolysis cell (MEC) operated in continuous flow for 6 months. The reactor was fed return sludge liquor, the concentrated filtrate of anaerobic digestion sludge that has a high chemical oxygen demand (COD). The use of a wastewater with increased soluble organics, along with optimisation of the hydraulic retention time (HRT), resulted in the highest VTR achieved by a pilot-scale MEC treating real wastewater. Peak HRT was 0.5-days, resulting in an average VTR of 3.82 kgCOD/m3∙day and a 55% COD removal efficiency. Finally, using the data obtained, a direct analysis of the potential savings from the reduced loading on AS was then made. Theoretical calculation of the required tank size, with the estimated costs and savings, indicates that the use of an MEC as a return sludge liquor pre-treatment technique could result in an industrially viable system.

Hydrogen gas production with an electroformed Ni mesh cathode catalysts in a single-chamber microbial electrolysis cell (MEC)

2015 ◽  
Vol 40 (41) ◽  
pp. 14095-14103 ◽  
Author(s):  
Abudukeremu Kadier ◽  
Yibadatihan Simayi ◽  
K. Chandrasekhar ◽  
Manal Ismail ◽  
Mohd Sahaid Kalil
Keyword(s):  
Gas Production ◽  
Hydrogen Gas ◽  
Electrolysis Cell ◽  
Microbial Electrolysis Cell ◽  
Single Chamber ◽  
Cathode Catalysts ◽  
Microbial Electrolysis

Hydrogen production in a microbial electrolysis cell fed with a dark fermentation effluent

2015 ◽  
Vol 45 (11) ◽  
pp. 1223-1229 ◽  
Author(s):  
Isaac Rivera ◽  
Germán Buitrón ◽  
Péter Bakonyi ◽  
Nándor Nemestóthy ◽  
Katalin Bélafi-Bakó
Keyword(s):  
Hydrogen Production ◽  
Dark Fermentation ◽  
Electrolysis Cell ◽  
Microbial Electrolysis Cell ◽  
Microbial Electrolysis
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