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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/2164

Title: Using Ecosan sludge for crop production
Authors: Jimenez, B
Austin, A
Cloete, E
Phasha, C
Keywords: Bacterial indicator organisms
Health risks
Helminth ova
Issue Date: 2006
Publisher: I W A Publishing
Citation: Jimenez, B, et al. 2006. Using Ecosan sludge for crop production. Water Science and Technology, vol. 54(5), pp 169-177
Abstract: This paper presents the microbial risks associated with the reuse of Ecosan sludge in agriculture. Sludge from KwaZulu Natal Province in South Africa with a helminth ova content of 30 HO/g TS, faecal coliforms of 10(6) CFU/g TS, faecal streptococci of 10(6) CFU/9 TS and Salmonella spp. of 10(5) CFU/g TS was used for this purpose. Applying different rates of sludge to spinach and carrots resulted in an increase in bacterial and helminth ova count's in crops as the quantity of sludge increased. The helminth ova content in crops was always greater in leaves than in stems, with a content varying from 2 to 15 HO/g TS for spinach with sludge application rates of 0-37.5 ton/ha and from 2-8 HO/g TS for carrot crops with sludge application rates varying from 0-35 ton/ha. Nevertheless, viability in crops was 20-25%, reducing the risk of disease. Consequently, the development of an Ecosan sludge revalorisation standard is considered important. Some recommendations are made taking into account the characteristics of the sludge as well as conditions in rural areas.
URI: http://hdl.handle.net/10204/2164
ISSN: 0273-1223
Appears in Collections:Planning support systems
General science, engineering & technology

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