The elimination of helminth ova, faecal coliforms, Salmonella and protozoan cysts by various physicochemical processes in wastewater and sludge

被引：39

作者：

Jiménez-Cisneros, BE ^{[1
]}

Maya-Rendón, C ^{[1
]}

Salgado-Velázquez, G ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City 04510, DF, Mexico

来源：

WATER SCIENCE AND TECHNOLOGY | 2001年 / 43卷 / 12期

关键词：

advanced primary treatment; helminth ova; faecal coliforms; Salmonella; cysts; alkaline stabilisation; acid stabilisation;

D O I：

10.2166/wst.2001.0733

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The removal of helminth ova, faecal coliforms, Salmonella and protozoan cysts by the application of physicochemical treatment processes to municipal wastewater and sludge was studied. In the first case, the advanced primary treatment (APT) process was studied, as well as filtration of the APT effluent. The APT sludge was treated with either lime or acid. The initial values of helminth ova, faecal coliforms, Salmonella and protozoan cysts in the wastewater were 23-27 eggs/L, 7.8x10(7)-6.5x10(8) MPN/100mL, 4.5x10(5)-2.4x10(6) MPN/100mL, and 1,007-1,814 cysts/L respectively. After APT treatment, 96% of the helminth ova, 1 log of faecal coliforms and Salmonella, and 67% of the protozoan cysts were eliminated. To reduce the concentration of helminth ova from values >1.2 ova/L to < 1 ova/L an additional filtration step was required. In the sludge, the initial values of helminth ova, faecal coliforms and Salmonella were 65-120 ova/g TS, 8.3x10(7)-1.4x10(11) MPN/g TS and 3.6x10(6)-2.4x10(10) MPN/g TS respectively. A 97% reduction of the helminth and an 8.5 log reduction of faecal coliforms and Salmonella was achieved by alkaline stabilisation, compared with a 98% and 4.5 log reduction by acid treatment.

引用

页码：179 / 182

页数：4

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