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Pakistan Journal of Biological Sciences

Year: 2004 | Volume: 7 | Issue: 12 | Page No.: 2061-2065
DOI: 10.3923/pjbs.2004.2061.2065
Comparison of Extended Aeration Activated Sludge Process and Activated Sludge with Lime Addition Method for Biosolids Stabilization
M. Farzadkia and A. H. Mahvi

Abstract: This study was conducted to disposal biosolids from Serkan sewage treatment plant and lime stabilized biosolids, from April 2002 to March 2003. Lime stabilization of biosolids was performed in the reactor with 30-liter capacity at Hamadan medical sciences university. Average amounts of VS/TS ratio, SOUR, fecal coliform and viable helminth ova density in disposal biosolids from Serkan treatment plant were 0.754, 3.395 mg.02/g.vs.h, 1.93x108 MPN/g of dry solids and 1100 ova/4 g of dry solids, respectively. By lime addition ratio about 0.4 g Ca(OH)2 /g of dry solids of biosolids, pH was not dropped under 12 and fecal coliform was not growth after 30 days. Disposal biosolids from Serkan treatment plant was raw. Lime addition could be stabilized this biosolid and the products could be well used as a landfill cover, or a soil conditioner. Capital and annual cost of activated sludge with lime stabilization biosolids was cheaper than extended aeration activated sludge about 45 and 55%, respectively.

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How to cite this article
M. Farzadkia and A. H. Mahvi, 2004. Comparison of Extended Aeration Activated Sludge Process and Activated Sludge with Lime Addition Method for Biosolids Stabilization. Pakistan Journal of Biological Sciences, 7: 2061-2065.

Keywords: extended aeration activated sludge, lime stabiliszation and biosolids reuse

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