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Two‐phase anaerobic fermentation of liquid swine waste to methane
Author(s) -
Cseh Tibor,
Czakó Lajos,
Czakó Jenö,
Tengerdy Robert P.
Publication year - 1984
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260261205
Subject(s) - acidogenesis , anaerobic digestion , chemistry , organic matter , methane , dry matter , fermentation , retention time , anaerobic exercise , lignin , mesophile , methanogenesis , biogas , chromatography , zoology , food science , waste management , biology , organic chemistry , physiology , genetics , bacteria , engineering
Two‐phase anaerobic digestion of liquid swine manure has been developed with options for single‐cell protein (SCP) or methane production. In the acidogenic phase at two to four days retention time, and 2.5–7.0% dry matter (DM) concentration, 8–46% of the volatile solids was solubilized. Maximum reactor capacity was 3.86 g/L at 7.0% DM concentration, but optimal operation was achieved at 4.5% DM concentration at four days retention time. The second methanogenic phase was operated continuously and had a maximum specific methane production rate of 0.70 L/L day at 12 days retention time. With recirculation, the rate was 1.16 L/L day at 8.5 days retention time with 52.7% conversion of organic matter. Maximum digestibility was 66% of the lignin free organic matter.