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Water Science and Technology Vol 31 No 5-6 pp 91–95 © IWA Publishing 1995

Pathogen die-off in stored wastewater sludge

R. A. Gibbs*, C. J. Hu*, G. E. Ho*, P. A. Phillips** and I. Unkovich***

*Institute for Environmental Science, Murdoch University Murdoch 6150, Western Australia Australia
**Virology Laboratory, Combined Laboratory Services, Health Department of Western Australia Australia
***Headworks and Treatment Division, Water Authority of Western Australia Australia


ABSTRACT
The storage of wastewater sludge as a possible low-cost means of pathogen reduction prior to its beneficial reuse was examined. However, after a 12 month storage period levels of Salmonella, faecal coliforms and streptococci, and Giardia cysts were too high for simple storage to be considered an adequate treatment option.

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