Effective swine wastewater treatment by combining microbial fuel cells with flocculation

Chemosphere
Weijun DingHaobin Huang

Abstract

Microbial fuel cells (MFCs) provide a cost-effective method for treating swine wastewater treatment and simultaneously producing electricity, yet they need to be combined with other wastewater treatment processes to improve the effluent water quality. In this paper, we constructed single-chamber air-cathode MFCs with a compact configuration for nitrogen and COD removal and high electricity production and combined them with a low-cost flocculation process to discharge higher quality wastewater. We show that MFCs could remove ammonia at a rate of 269.2 ± 0.5 g m(-3) d(-1) (99.1± 0.1% ammonia removal efficiency) with a maximum power density of 37.5 W m(-3) and 21.6% of coulombic efficiency at a 40:60 ratio of raw swine wastewater to denitrification effluent of swine wastewater. Up to 82.5 ± 0.5% COD could be removed with MFCs, from 2735 ± 15 mg L(-1) to 480 ± 15 mg L(-1), and flocculation further reduced levels to 90 ± 1 mg L(-1) for a 96.6 ± 0.2% overall COD removal efficiency of the combination technology. Cost analysis of the combined MFC and flocculation process showed a net economic benefit of $ 0.026 m(-3). In summary, this novel combination wastewater treatment method provides an effective way to treat swine wastewater to l...Continue Reading

Citations

Feb 10, 2018·Environmental Science and Pollution Research International·Kuppusamy SathishkumarAruliah Rajasekar
Jan 9, 2019·Environmental Science and Pollution Research International·Ying ZhangMinghua Zhou
Jan 10, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Xunzhou LiYangguo Zhao
Aug 29, 2020·World Journal of Microbiology & Biotechnology·Shuyu XiangLeipeng Cao
Jul 5, 2018·Environmental Science and Pollution Research International·Wenbin LiuYingjie Zhang
Jan 14, 2020·Environmental Science and Pollution Research International·Rongchang WangJiabin Yao
Nov 1, 2020·Journal of Environmental Management·Itzel Y López-PachecoRoberto Parra-Saldívar
Aug 12, 2020·Journal of Environmental Management·Xunzhou LiYangguo Zhao
Feb 20, 2019·Journal of Environmental Management·Palaniappan SivasankarSivakumar Loganathan
Mar 29, 2021·Environmental Pollution·Naassom Wagner Sales MoraisAndré Bezerra Dos Santos

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