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DOI : ,    Vol.10, No.3, 109 ~ 116, 2002
Title
A Study on Pretreatment of Mixed Wastewater of Night soil and Leachate
최정우Jeung Woo Choi,현길수Kil Soo Hyun,염국환Gug Hwan Yum
Abstract
The influent of mixed wastewater of night-soil and leachate from waste landfill to existing wastewater treatment plant have increased, which have resulted in the increase of the levels of nitrogen, phosphorus and heavy metals in the effluent from activated sludge process. The pretreatment of the mixed wastewater needs to improve the effluent from activated sludge process. As physiochemical and biological pretreatment processes of the mixed wastewater, coagulation-sedimentation process using alum as coagulant and anaerobic-oxic biofilm process(AOBP) packed with fibrous media and honey-comb media have compared to reduce the contaminants. As a results, AOBP was more effective in reducing nitrogen, phosphorus and heavy metals than the physicochemical process:COD 20∼30% NH_4-N 30∼40%. P0_4-P 20%, heavy metals(Fe, Cr^6+) 10∼20%.
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