Expediting COD removal in microbial electrolysis cells by increasing biomass concentration
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Microorganisms catalyse the reaction and in this study, mainly the effect of different concentration of biomass on COD removal was investigated. Three sets of two-compartment reactors were established. The cation exchange membrane (CEM) was employed in each reactor and 0.5. V of electricity was supplied. Graphite rod employed in cathodic part and a combination of graphite rod and graphite granules were used in anodic chamber. The highest rate of COD removal (40. 2.0. ppm/h) was achieved in the reactor which had initial VSS at 6130. mg/l, whereas the slowest rate of 23. 1.2. ppm/h in the reactor started with 3365. mgVSS/l. Some ammonia removal was also noticed during the operation. Further understanding and improvement is needed to be competitive against traditional wastewater treatment processes.
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