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Water Science & Technology Vol 46 No 9 pp 315–321 © IWA Publishing 2002

Co-treatment of septage in a municipal sewage treatment pond system

B. Kurup*, R. Kurup**, K. Mathew*** and G. Ho****

*Environmental Engineers International, 25 Sullivan Road, Duncraig, WA 6023 Australia
**Environmental Engineers International, 25 Sullivan Road, Duncraig, WA 6023 Australia. Environmental Science, Murdoch University, Perth, Western Australia, 6150 Australia
***Environmental Science, Murdoch University, Perth, Western Australia, 6150 Australia
****Environmental Science, Murdoch University, Perth, Western Australia, 6150 Australia


ABSTRACT
This paper deals with the characteristics and treatment options of septage. The objective of the paper is to evaluate the effects of co-treatment of 50 MLD of septage in a sewage treatment pond system. The treatment efficiency of the pond system for BOD5 and Fecal Coliform (FC) has been estimated using a first order kinetics model. The model has predicted that the treatment pond system has a maximum capacity of 8.5 MLD and will have a reserve of 28.3% of its total capacity even after the proposed addition of 50 MLD of septage. Separation of oil and grease from septage prior to discharge into the pond system is recommended.

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