Abstract：
: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.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zeshan,Karthikeyan OP,Visvanathan Cdoi
10.1016/j.biortech.2012.02.028subject
Has Abstractpub_date
2012-06-01 00:00:00pages
294-302eissn
0960-8524issn
1873-2976pii
S0960-8524(12)00257-Xjournal_volume
113pub_type
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