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Coupling of anodic biooxidation and cathodic bioelectro-Fenton for enhanced swine wastewater treatment |
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| Authors: | Xu Nan Zhou Shungui Yuan Yong Qin Huan Zheng Yu Shu Canwei |
| Institution: | a School of Environment and Energy, The Key Laboratory for Environmental and Urban Sciences, Peking University Shenzhen Graduate School, Shenzhen 518055, China b Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China c Guangdong Wen’s Group Academy, Xinxing 527400, China |
| Abstract: | A novel bioelectrochemical reactor with anodic biooxidation coupled to cathodic bioelectro-Fenton was developed for the enhanced treatment of highly concentrated organic wastewater. Using swine wastewater as a model, the anode-cathode coupled system was demonstrated to be both efficient and energy-saving. Without any external energy supply to the system, BOD5, COD, NH3-N and TOC in the wastewater could be greatly reduced at both 1.1 g COD L−1 d−1 and 4.6 g COD L−1 d−1 of OLR, with the overall removal rates ranging from 62.2% to 95.7%. Simultaneously, electricity was generated at around 3-8 W m−3 of maximum output power density. Based on electron balance calculation, 60-65% of all the electrons produced from anodic biooxidation were consumed in the cathodic bioelectro-Fenton process. This coupled system has a potential for enhanced treatment of high strength wastewater and provides a new way for efficient utilization of the electron generated from biooxidation of organic matters. |
| Keywords: | Bioelectrochemical reactor Anodic biooxidation Cathodic bioelectron-Fenton Swine wastewater |
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