Mesophilic anaerobic digestion of sewage sludge to obtain class B biosolids: Microbiological methods development

被引：48
作者：
Forster-Carneiro, T. [1 ]
Riau, V. [1 ]
Perez, M. [1 ]
机构：
[1] Univ Cadiz, Fac Sea & Environm Sci, Dept Environm Technol, Cadiz 11510, Spain
来源：
BIOMASS & BIOENERGY | 2010年 / 34卷 / 12期
关键词：
Raw sludge; Digested sludge; Mesophilic anaerobic digestion; Pathogens; Faecal coliforms; Salmonella spp; THERMOPHILIC DIGESTION; PERFORMANCE; VIRUSES; BACTERIOPHAGES; MICROORGANISMS; INDICATORS; BACTERIAL; TPAD;
D O I：
10.1016/j.biombioe.2010.07.010
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The main objective of this research was to propose two methods to quantify faecal coliforms and Salmonella spp. in both raw sludge and mesophilic digested sludge. Besides, a performance of a mesophilic digester operating at 30 and 20 days of solid retention time (SRT) was studied. The microbiological methods were carried out according to the Standard Methods (APHA, 1998) and to the American Environmental Protection Agency (US EPA, 1992) and new stages were suggested to determine pathogen concentrations in raw sludge as well as digested biosolids. The results showed that the anaerobic mesophilic digestion is able to remove high percentages of faecal coliforms and Salmonella spp. giving rise to digested sludge that can be classified as Class B biosolid, i.e. an effluent with faecal coliforms density less than 2 x 10(6) colonies g(-1) total solids. Viable helminth eggs are not necessarily reduced in Class B biosolids. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1805 / 1812
页数：8
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