Abstract：
:Extracellular enzymes offer active catalysis for hydrolysis of organic solid wastes in anaerobic digestion. To evidence the quantitative significance of hydrolytic enzyme activities for major waste components, track studies of thermophilic and mesophilic anaerobic sequencing-batch reactors (TASBR and MASBR) were conducted using a co-substrate of real organic wastes. During 1day batch cycle, TASBR showed higher amylase activity for carbohydrate (46%), protease activity for proteins (270%), and lipase activity for lipids (19%) than MASBR. In particular, the track study of protease identified that thermophilic anaerobes degraded protein polymers much more rapidly. Results revealed that differences in enzyme activities eventually affected acidogenic and methanogenic performances. It was demonstrated that the superior nature of enzymatic capability at thermophilic condition led to successive high-rate acidogenesis and 32% higher CH(4) recovery. Consequently, these results evidence that the coupling thermophilic digestion with sequencing-batch operation is a viable option to promote enzymatic hydrolysis of organic particulates.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Kim HW,Nam JY,Kang ST,Kim DH,Jung KW,Shin HSdoi
10.1016/j.biortech.2012.01.146subject
Has Abstractpub_date
2012-04-01 00:00:00pages
130-4eissn
0960-8524issn
1873-2976pii
S0960-8524(12)00189-7journal_volume
110pub_type
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