Assessment of a novel overflow-type electrochemical membrane bioreactor (EMBR) for wastewater treatment, energy recovery and membrane fouling mitigation
| Autor: | Shi Huixiang, Yuhong Zhou, Zhou Guoqiang, Zhou Guowang, Xiankai Wan, Lian Lu |
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| Rok vydání: | 2015 |
| Předmět: |
Environmental Engineering
Microbial fuel cell Fouling Bioelectric Energy Sources Biofouling Renewable Energy Sustainability and the Environment Chemistry Membrane fouling Environmental engineering Membranes Artificial Bioengineering Electrochemical Techniques General Medicine Wastewater Pulp and paper industry Membrane bioreactor Water Purification Bioreactors Extracellular polymeric substance Bioreactor Energy source Waste Management and Disposal |
| Zdroj: | Bioresource Technology. 196:648-655 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2015.08.032 |
| Popis: | A novel overflow-type electrochemical membrane bioreactor (EMBR) without ion exchange membrane, was developed for wastewater treatment and utilized electricity recovered by microbial fuel cell (MFC) for membrane fouling mitigation in membrane bioreactor (MBR). The maximum power density of 629 mW/m3 or 7.18 mW/m2 was obtained. The removal efficiencies of chemical oxygen demand, ammonia nitrogen and total nitrogen under appropriate ranges of hydraulic retention times (16.9–8.5 h) were 92.6 ± 5.4%, 96.5 ± 2.8% and 73.9 ± 9.7%, respectively. Sequencing showed electrochemically active bacteria Lactococcus, Bacillus and Saprospiraceae_uncultured were abundant in the biofilm. Compared with a conventional MBR, five significant effects of the MFC integration on the sludge properties, including particle zeta potential decrease, particle size distribution macroaggregation, soluble microbial products and extracellular polymeric substances reduction and SMPP/SMPC ratio increase, were achieved in this system, leading to membrane fouling mitigation. This system shows great promise for practical wastewater treatment application. |
| Databáze: | OpenAIRE |
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