Overcoming organic and nitrogen overload in thermophilic anaerobic digestion of pig slurry by coupling a microbial electrolysis cell

被引:66
作者
Cerrillo, Miriam [1 ]
Vinas, Marc [1 ]
Bonmati, August [1 ]
机构
[1] GIRO Joint Res Unit IRTA UPC, IRTA, Torre Marimon, Ctra C-59,Km 12,1, E-08140 Barcelona, Spain
关键词
Microbial electrolysis cell (MEC); Thermophilic anaerobic digestion; System stability; Ammonia recovery; Inhibition phenomenon; AMMONIA INHIBITION; SWINE MANURE; COMMUNITY; WASTE; BACTERIAL; RECOVERY;
D O I
10.1016/j.biortech.2016.05.085
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
The combination of the anaerobic digestion (AD) process with a microbial electrolysis cell (MEC) coupled to an ammonia stripping unit as a post-treatment was assessed both in series operation, to improve the quality of the effluent, and in loop configuration recirculating the effluent, to increase the AD robustness. The MEC allowed maintaining the chemical oxygen demand removal of the whole system of 46 +/- 5% despite the AD destabilization after doubling the organic and nitrogen loads, while recovering 40 +/- 3% of ammonia. The AD-MEC system, in loop configuration, helped to recover the AD (55% increase in methane productivity) and attained a more stable and robust operation. The microbial population assessment revealed an enhancement of AD methanogenic archaea numbers and a shift in eubacterial population. The AD-MEC combined system is a promising strategy for stabilizing AD against organic and nitrogen overloads, while improving the quality of the effluent and recovering nutrients for their reutilization. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:362 / 372
页数:11
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