期刊
BIORESOURCE TECHNOLOGY
卷 219, 期 -, 页码 348-356出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.07.103
关键词
Microbial electrolysis cell (MEC); Anaerobic digestion; Ammonia recovery; System stability; Volatile fatty acids (VFAs)
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]
Continuous assays with a microbial electrolysis cell (MEC) fed with digested pig slurry were performed to evaluate its stability and robustness to malfunction periods of an anaerobic digestion (AD) reactor and its feasibility as a strategy to recover ammonia. When performing punctual pulses of volatile fatty acids (VFA) in the anode compartment of the MEC, simulating a malfunction of the AD process, an increase in the current density was produced (up to 14 times, reaching values of 3500 mA m(-2)) as a result of the added chemical oxygen demand (COD), especially when acetate was used. Furthermore, ammonium diffusion from the anode to the cathode compartment was enhanced and the removal efficiency achieved up to 60% during daily basis VFA pulses. An AD-MEC combined system has proven to be a robust and stable configuration to obtain a high quality effluent, with a lower organic and ammonium content. (C) 2016 Elsevier Ltd. All rights reserved.
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