期刊
CHEMICAL ENGINEERING JOURNAL
卷 355, 期 -, 页码 186-195出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.08.110
关键词
Textile dyeing effluent; Photolysis; Biodegradation; Metagenome; Nitrincola; Grau's model
资金
- Council of Scientific and Industrial Research (CSIR), New Delhi, India
- CSIR [SETCA-CSC 0113]
This study investigates the biodegradation of electrochemically pre-treated textile effluent. The duration effect of electrochemical oxidation (EO) on enhancement of biodegradability and the biodegradation efficiency on untreated and electrochemically pre-treated effluents were evaluated. The EO pre-treatment was performed using Ti/TiO2-RuO2 as anode and Ti metal as cathode. The biodegradation was carried-out using oxic, anoxic and hybrid oxic-anoxic consortia. The increase in the duration of EO pre-treatment resulted in the decrease in the duration of biodegradation. The biodegradation kinetics (Grau's second order rate) has shown that the oxic-anoxic consortium was 3-fold faster than oxic consortium in EO pre-treated effluent. Complete COD removal (< 25 mg L-1) and > 90% of TOC removal were achieved by the combined electrochemical and oxic-anoxic biodegradation system. The role of Nitrincola sp. in the oxic-anoxic consortium was reported for the first time using metagenome analysis. The oxic-anoxic consortium was enriched with both O-2 dependent classical aerobic pathway and NADP-dependent benzoyl-CoA oxidation pathway.
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