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Effects of o ‐cresol co‐disposal and pH on the methanogenic degradation of refuse
Author(s) -
WatsonCraik Sulisti. I.A.,
Senior E.
Publication year - 1996
Publication title -
letters in applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.698
H-Index - 110
eISSN - 1472-765X
pISSN - 0266-8254
DOI - 10.1111/j.1472-765x.1996.tb01137.x
Subject(s) - methanogenesis , propionate , chemistry , methane , degradation (telecommunications) , biodegradation , nuclear chemistry , bacteria , environmental chemistry , metabolism , food science , inorganic chemistry , biochemistry , organic chemistry , biology , telecommunications , computer science , genetics
SULISTI, I.A. WATSON‐CRAIK AND E. SENIOR. 1996. Both maximum o ‐cresol degradation and activity of sulphate‐reducing bacteria (SRB) were observed at refuse pH values between 7.0 and 8.0. Optimum pH values for methane release were between 6.5 and 7.5. Partial inhibition of methane production was recorded at pH 5.7, 6.0 and 8.0, whilst sulphate reduction was inhibited partially at pH values 5.7–6.5. Both sulphate reduction and methanogenesis were completely inhibited in refuse with initial pH 4.0. The catabolism of acetate occurred under similar conditions to methane production, and was promoted at pH 6.5–7.5. It appeared that propionate oxidation depended upon the activities of SRB. Optimum conditions for the metabolism of propionate and other volatile fatty acids were between pH 7.0 and 8.0.