title: Anaerobic hydrolysis and acidification of organic substrates: determination of anaerobic hydrolytic potential.
abstract: This study aimed to develop a biochemical-test mainly to evaluate the hydrolytic-potential of different substrates and to apply this test to characterize various organic substrates. Outcome of this study can be used for optimization of the WWTPs through enhancement of N/P removal or anaerobic digestion. Out of four series of batch experiments, the first two tests were conducted to determine the optimal operating conditions (test duration, inoculum-ratio etc.) for the hydrolytic-potential test using secondary and synthetically-prepared sludges. Based on the results (generation of CODs, pH and VFA), test duration was fixed between 6 and 7d allowing to attain maximum hydrolysis and to avoid methanogenesis. Effect of inoculum-ratios on acid fermentation of sludge was not significantly noticed. Using this methodology, third and fourth tests were performed to characterize various organic substrates namely secondary, pre-treated sludge, pig and two different cattle slurries. VFA production was shown to be substantially dependent on substrates types.
authors: Cemagref, UR GERE, 17, Avenue de Cucillé, CS 64427, F-35044 Rennes, France.
authors: Rajinikanth
authors: R
authors: Rajagopal
authors: Fabrice
authors: F
authors: Béline
mesh_terms: D000143:Acids / Q000737:chemistry*; D000693:Anaerobiosis; D005285:Fermentation; D006868:Hydrolysis; D009930:Organic Chemicals / Q000737:chemistry*; D012722:Sewage
chemical_list: D000143:Acids; D009930:Organic Chemicals; D012722:Sewage