Abstract：
:Degradation kinetics of particulate matter in anaerobic digestion of secondary sludge, untreated and sonicated, was investigated by carrying out batch tests at different feed/inoculum ratio (F/I) (in the range of 0.1-4.0). Particulate COD degradation data were analysed using the four equations most widely utilized to model the hydrolysis process and the related kinetic parameters were evaluated. The increase of F/I results in a correspondent increase of the process rate up to one order of magnitude in the investigated interval for both untreated and sonicated sludge. The maximum step increase is observed in the range of 0.1-2.0 while for F/I varying from 2.0 to 4.0 only a modest enhancement of the process kinetics is detected. The effect of sonication on kinetics is not appreciable at low F/I, due to the low fraction of fed sludge and to the consequent strong substrate limitation, whereas at high F/I a slight increase is evidenced.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Tomei MC,Braguglia CM,Mininni Gdoi
10.1016/j.biortech.2007.12.035subject
Has Abstractpub_date
2008-09-01 00:00:00pages
6119-26issue
14eissn
0960-8524issn
1873-2976pii
S0960-8524(07)01059-0journal_volume
99pub_type
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