期刊
BIORESOURCE TECHNOLOGY
卷 188, 期 -, 页码 33-42出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.02.014
关键词
Periodic discontinuous batch process; Bioelectrochemical system (BES); Anoxic microenvironment; Bioelectrogenesis; Wastewater
资金
- Council for Scientific and Industrial Research (CSIR - India) [SETCA (CSC-0113)]
- Department of Biotechnology (DBT), Government of India in the framework of National Bioscience Award [BT/HRD/NBA/34/01/2012(vi)]
- CSIR, New Delhi
- CSIR-IICT
The present study evaluates the sequential integration of two advanced biological treatment methods viz., sequencing batch reactor (SBR) and bioelectrochemical treatment systems (BET) for the treatment of real-field petrochemical wastewater (PCW). Initially two SBR reactors were operated in aerobic (SBRAe) and anoxic (SBRAx) microenvironments with an organic loading rate (OLR) of 9.68 kg COD/m(3)-day. Relatively, SBRAx showed higher substrate degradation (3.34 kg COD/m(3)-day) compared to SBRAe (2.9 kg COD/m(3)-day). To further improve treatment efficiency, the effluents from SBR process were fed to BET reactors. BETAx depicted higher SDR (1.92 kg COD/m(3)-day) with simultaneous power generation (17.12 mW/m(2)) followed by BETAe (1.80 kg COD/m(3)-day; 14.25 mW/m(2)). Integrating both the processes documented significant improvement in COD removal efficiency due to the flexibility of combining multiple microenvironments sequentially. Results were supported with GC-MS and FTIR, which confirmed the increment in biodegradability of wastewater. (C) 2015 Elsevier Ltd. All rights reserved.
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