Effect of C/N ratio and ammonia-N accumulation in a pilot-scale thermophilic dry anaerobic digester

被引：146

作者：

Zeshan ^{[1
]}

Karthikeyan, Obuli P. ^{[1
]}

Visvanathan, Chettiyappan ^{[1
]}

机构：

[1] Asian Inst Technol, Sch Environment Resources & Dev, Environm Engn & Management Program, Bangkok 10501, Thailand

来源：

BIORESOURCE TECHNOLOGY | 2012年 / 113卷

关键词：

Dry anaerobic digestion; Pilot scale thermophilic system; Organic fraction of municipal solid waste; Ammonia-N; C/N ratio; MUNICIPAL SOLID-WASTE; ORGANIC FRACTION; INHIBITION; MANURE;

D O I：

10.1016/j.biortech.2012.02.028

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The effect of ammonia-N accumulation in a dry anaerobic digestion was studied effectively using pilot-scale thermophilic reactor. Two simulations were prepared to attain C/N ratio 27 and C/N ratio 32 using bio-degradable feedstocks such as food waste, fruit and vegetable waste, green waste and paper waste. Organic loading rates and digestate recirculation rates were varied during different time intervals and the performance was evaluated using parameters like pH, VFA, Alkalinity, ammonia-N and biogas yield. Results showed that the simulation with C/N ratio 32 had about 30% less ammonia in digestate as compared to that with C/N ratio 27. The system performed well up to organic loading rate (OLR) 7-10 kgVS/m(3) d and retention time up to 19 days, with surplus energy production of 50-73%. Moreover, a free ammonia accumulation/inhibition effect was documented and methods to overcome the adverse effects were discussed. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：294 / 302

页数：9

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