Microbial electrochemical nutrient recovery in anaerobic osmotic membrane bioreactors

WATER RESEARCH

卷:114

Article

Hou, Dianxun¹  Lu, Lu¹  Sun, Dongya²  Ge, Zheng¹  Huang, Xia²  Cath, Tzahi Y.³  Ren, Zhiyong Jason¹ 

[1] Univ Colorado Boulder, Dept Civil Environm & Architectural Engn, Boulder, CO USA

[2] Tsinghua Univ, State Key Joint Lab Environm Simulat & Pollut Con, Sch Environm, Beijing, Peoples R China

[3] Colorado Sch Mines, Dept Civil & Environm Engn, Golden, CO USA

关键词: Forward osmosis;    Anaerobic osmotic membrane bioreactor;    Nutrient recovery;    Microbial electrochemical technology;    Dissolved methane;   

DOI  :  10.1016/j.watres.2017.02.034

来源: Elsevier

【 摘 要 】

This study demonstrates that by incorporating a microbial electrochemical unit into an anaerobic osmotic membrane bioreactor (AnOMBR), the system addressed several challenges faced by traditional anaerobic membrane bioreactors and recovered biogas, nitrogen, and phosphorus while maintaining high effluent quality with low dissolved methane. The microbial recovery cell (MRC)-AnOMBR system showed excellent organic (>93%) and phosphorus removal (>99%) and maintained effluent COD below 20 mg/L. Furthermore, the reactor effectively recovered up to 65% Pai(4)(3-) and 45% NH4+ from the influent, which can be further improved if membranes with higher selectivity are used. Nutrients removal from bulk solution mitigated NH4+ penetration to the draw solution and reduced scaling potential caused by POI43-. The maximum methane yield was 0.19 L CH4/g COD, and low methane (<2.5 mL CH4/L) was detected in the effluent. Further improvement can be made by increasing charge efficiency for better nutrient and energy recovery. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free