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Anaerobic treatment of fresh leachate from a
municipal solid waste incinerator by upflow blanket filter reactor |
Pinjing HE,Min LI,Suyun XU,Liming SHAO, |
State Key Laboratory
of Pollution Control and Resource Reuse, Key Laboratory of Yangtze
River Water Environment, College of Environmental Science and Engineering,
Tongji University, Shanghai 200092, China; |
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Abstract This paper describes the feasibility of fresh leachate treatment by an upflow blanket filter (UBF). Through dilution and partial effluent recycling, the organic loading rates increased from 0.51to 14.56kg COD/(m3·d), meanwhile the corresponding hydraulic retention time decreased from 9.0d to 3.6d. The reactor was able to achieve steady-state within 80d. Based on the distribution of COD fluxes in the process, it was concluded that anabolism was the main pathway of COD removal in the initial phase (1―33d), accounting for 57%―85% of total COD removed. As the anaerobic consortium of bacteria reached steady-state (after 70―86d), the majority of COD removed was transformed into methane, because the specific methane yield was close to the theoretical value (0.36L CH4/(g CODdeg)).
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Keywords
distribution of COD fluxes
effluent recycling
leachate
methane yield
organic loading rate
upflow blanket filter
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Issue Date: 05 December 2009
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