Abstract：
:In this study, the influence of NaOH and thermal pretreatment of dewatered activated sludge (DAS) on the high-solid solubilisation and anaerobic digestion was separately investigated by monitoring common parameters. The results indicated that COD, proteins and carbohydrates were efficiently solubilised in both NaOH and thermal pretreated DAS samples. For NaOH pretreatment, the concentrations of volatile fatty acids (VFAs) and total ammonium nitrogen (TAN) firstly increased followed by decreasing with NaOH dose increasing. However, they decreased with the severity of thermal pretreatment. During the batch digestion experiments (at 37°C), for 80mg NaOHg(-1) total solid (TS) DAS pretreatment it resulted in a 6.99% decrease in cumulative methane yield (CMY) compared to untreated DAS. While for 80, 100, 120°C and 20mg NaOH pretreatment, CMY increased by 15%, 42%, 71% and 35%, respectively, in comparison to untreated DAS.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhang S,Guo H,Du L,Liang J,Lu X,Li N,Zhang Kdoi
10.1016/j.biortech.2015.02.050subject
Has Abstractpub_date
2015-06-01 00:00:00pages
171-7eissn
0960-8524issn
1873-2976pii
S0960-8524(15)00229-1journal_volume
185pub_type
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