期刊
BIOELECTROCHEMISTRY
卷 110, 期 -, 页码 69-78出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.bioelechem.2016.03.004
关键词
Bioelectrochemical systems (BES); Anaerobic digestion; Ammonia recovery; Raw and digested pig slurry; Desulfuromonadaceae; System integration
资金
- Spanish Ministry of Economy and Competitiveness (INIA project) [RTA2012-00096-00-00]
- Secretariat for Universities and Research of the Ministry of Economy and Knowledge of the Catalan Government [2013FI_B 00014]
Both raw and anaerobically digested pig slurries were investigated in batch assays in two chambered bioelectrochemical systems (BES) run in Microbial Fuel Cell (MFC) and Microbial Electrolysis Cell (MEC) mode. Chemical Oxygen Demand (COD) removal, nitrogen recovery, cation transport and anode microbial population evolutions were assessed. The Anaerobic Digestion-MEC (AD-MEC) integrated system achieved the highest COD removal (60% in 48 h); while the maximum NH4+ removal efficiency (40%, with an ammonia flux of 8.86 g N-NH4+ d(-1) m(-2)) was achieved in MFC mode fed with digested pig slurry in 24 h. On the other hand, the high pH (12.1) achieved in MEC mode (NaCl solution as catholyte), could favour ammonium recovery in a subsequent stripping and absorption process. Ammonia was the main cation involved in maintaining the electroneutrality between both compartments. Regarding microbial population, Desulfuromonadaceae, a known family of exoelectrogenic bacteria, was enriched under MEC mode, whereas hydrogenotrophic and methylotrophic methanogen phylotypes belonging to Thermoplasmatales were also favoured against acetotrophic Methanosaetaceae. From these results, the integration of anaerobic digestion in BES seems to be an interesting altemative for the treatment of complex substrates, since a polished effluent can be obtained and ammonium can be simultaneously recovered for further reuse as fertilizer. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据