DocumentCode :
2513073
Title :
Mesophilic Two-Phase Anaerobic Digestion of Waste Activated Sludge with Different VS Contents
Author :
Zhang, Liguo ; Yin, Jun ; Liu, Lei ; Zang, Lixin
Author_Institution :
Sch. of Chem. & Environ., South China Normal Univ., Guangzhou, China
fYear :
2009
fDate :
11-13 June 2009
Firstpage :
1
Lastpage :
4
Abstract :
Two types of waste activated sludge (WAS) and kitchen garbage were used to prepare the WAS samples with different volatile solid (VS) contents, and the digestion efficiencies of prepared samples were investigated by mesophilic two-phase anaerobic digestion (TPAD) process. The experimental results showed that the ratio of volatile fatted acids and bicarbonate alkalinity (VFA/BA) in acidogenic phase was 0.05 for the system with the addition of kitchen garbage, and those of WAS samples were both lower than 0.02, indicating better stabilization of the two-phase systems. The VS and total COD removal efficiencies increased with increasing hydraulic retention time (HRT). The maximum removal efficiencies of VS and total COD were achieved when the HRT was 20 d, and the maximum VS and total COD removal efficiencies were 47.9% and 49.2%, respectively. The specific methanogenic activity (SMA) and methane content of biogas both increased with increasing HRT. The addition of kitchen garbage into the low organic WAS sample could improve both organic removal efficiency and biogas yield.
Keywords :
biofuel; biotechnology; refuse disposal; sludge treatment; wastewater treatment; COD removal; acidogenic phase; bicarbonate alkalinity; biogas yield; efficiency 47.9 percent; efficiency 49.2 percent; hydraulic retention time; kitchen garbage; mesophilic two-phase anaerobic digestion; methane content; organic removal efficiency; specific methanogenic activity; time 20 day; volatile fatted acids; volatile solid contents; waste activated sludge; Chemistry; Civil engineering; Nitrogen; Pathogens; Sludge treatment; Solids; Testing; Thermal conductivity; Waste materials; Wastewater treatment;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
Type :
conf
DOI :
10.1109/ICBBE.2009.5163043
Filename :
5163043
Link To Document :
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