COMPARISON BETWEEN THERMOPHILIC AND MESOPHILIC ANAEROBIC-DIGESTION OF SEWAGE-SLUDGE COMING FROM URBAN WASTE-WATER TREATMENT PLANTS

被引：7
|
作者：
CECCHI, F [1 ]
PAVAN, P [1 ]
MUSACCO, A [1 ]
MATAALVAREZ, J [1 ]
SANS, C [1 ]
机构：
[1] UNIV BARCELONA,DEPT CHEM ENGN,E-08028 BARCELONA,SPAIN
来源：
WATER SCIENCE AND TECHNOLOGY | 1992年 / 26卷 / 9-11期
关键词：
BIOGAS; SEWAGE SLUDGE; THERMOPHILIC; METHANIZATION; ANAEROBIC DIGESTION; ECONOMICS;
D O I：
10.2166/wst.1992.0749
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Yields of anaerobic digestion (AD) of sewage sludge carried out at mesophilic and thermophilic conditions at the optimum hydraulic retention times (HRT) found for the semi-dry AD of the mechanically selected organic fraction of municipal solid waste (OFMSW) (15 and 12 days, respectively) are compared. Due to the characteristics of the sludge used in thermophilic conditions (partially stabilized) the specific biogas production was lower. However, stability parameters show a secure process. Based on experience gained digesting OFMSW and hypothesizing a similar ratio between yields at mesophilic and thermophilic conditions, an economic analysis has been carried out. It shows that the increased biogas production is large enough to compensate the additional consumption to heat the feed flow rate to 55-degrees-C instead to 35-degrees-C.
引用
收藏
页码：2409 / 2412
页数：4
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