AI Article Synopsis
- The study compares a Bioelectrochemical Treatment (BET) system with an anoxic environment to a traditional anoxic treatment (AxT) system using the same bacterial consortia to treat chemical wastewater.
- The BET system achieved significantly higher removal efficiencies for various pollutants, including 90% Chemical Oxygen Demand (COD) removal, while AxT only achieved 47%.
- Additionally, the BET system generated bioelectricity while effectively reducing wastewater toxicity, unlike the AxT, which showed a more consistent but less effective performance.
Article Abstract
Bioelectrochemical treatment system (BET) with anoxic anodic microenvironment was studied with chemical wastewater (CW) in comparison with anoxic treatment (AxT, sequencing batch reactor (SBR)) with same parent anaerobic consortia. BET system documented relatively higher treatment efficiency at higher organic load (5.0 kg COD/m(3)) accounting for COD removal efficiency of (90%) along with nitrate (48%), phosphate (51%), sulphates (68%), colour (63%) and turbidity (90%) removal, compared to AxT operation (COD, 47%; nitrate, 36%; phosphate, 32%; sulphate, 35%; colour, 45% and turbidity, 54%). The self-induced bio-potential developed due to the electrode assembly in BET resulted in effective treatment with simultaneous bioelectricity generation (631 mA/m(2)). AxT operation showed persistent reduction behaviour, while simultaneous redox behaviour was observed with BET indicating balanced electron transfer. BET operation illustrated higher wastewater toxicity reduction compared to the AxT system which documents the variation in bio-electrocatalytic behaviour of same consortia under different microenvironment.
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| http://dx.doi.org/10.1016/j.biortech.2013.10.028 | DOI Listing |
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