Open AccessInfluence of fermentation metabolites on redox potential in anaerobic digestion of proteinaceous solid wastes by Synergistes sp.
Author(s) -
Kumar Arumugam Ganesh,
Kirubagaran Ramalingam,
Nagesh Narayana,
Parrado Rubio Juan,
Sekaran Ganesan
Publication year - 2010
Publication title -
engineering in life sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.547
H-Index - 57
eISSN - 1618-2863
pISSN - 1618-0240
DOI - 10.1002/elsc.200900057
Subject(s) - fermentation , anaerobic digestion , chemistry , hydrolysis , lipase , anaerobic exercise , food science , redox , ammonia , biochemistry , digestion (alchemy) , thermophile , chromatography , enzyme , biology , methane , organic chemistry , physiology
The anaerobic digestion of animal fleshing from tannery solid waste was investigated with regard to hydrolytic enzymes, protease and lipase, fermentative enzyme deaminase, soluble protein and amino acids, redox potential (Eh), volatile fatty acids, ammonia and carbon dioxide up to 120 h of retention time. The release of these fermentation metabolites at various retention times greatly influenced the Eh. In the hydrolytic phase, the maximum value of Eh was −50 mV and it reached the minimum of −350 mV in 24 h in the fermentative phase. The minimum and maximum values of Eh were −387 and −452 mV at 80 h of anaerobic digestion. The release of extracellular metabolites was confirmed by HPLC and GC‐MS. In this study, we have found that the ammonia and pH had a substantial influence on the Eh during the anaerobic digestion of animal fleshing.