Abstract：
:Degradation of protein and carbohydrate is vital for sludge anaerobic digestion performance. However, few studies focused on degradation properties of protein and carbohydrate. This study investigated detailed degradation properties of sludge protein and carbohydrate in order to gain insight into organics removal during anaerobic digestion. Results showed that carbohydrate was more efficiently degraded than protein and was degraded prior to protein. The final removal efficiencies of carbohydrate and protein were 49.7% and 32.2%, respectively. The first 3 days were a lag phase for protein degradation since rapid carbohydrate degradation in this phase led to repression of protease formation. Kinetics results showed that, after initial lag phase, protein degradation followed the first-order kinetic with rate constants of 0.0197 and 0.0018 d(-1) during later rapid degradation phase and slow degradation phase, respectively. Carbohydrate degradation also followed the first-order kinetics with a rate constant of 0.007 d(-1) after initial quick degradation phase.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Yang G,Zhang P,Zhang G,Wang Y,Yang Adoi
10.1016/j.biortech.2015.05.076subject
Has Abstractpub_date
2015-09-01 00:00:00pages
126-30eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00749-Xjournal_volume
192pub_type
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