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DOI : 10.17640/KSWST.2016.24.3.3 ,    Vol.24, No.3, 3 ~ 11, 2016
Title
Removal of Released Phosphorus in Anaerobic Digested Activated Sludge Using Thickener Sludge Generated During the Total Phosphorus Removal Process in the Municipal Wastewater Treatment Plant
서정인 Jung-in Suh , 윤호석 Ho-seok Yoon , 조관훈 Kwan-hoon Cho , 권대원 Dae-won Kwon
Abstract
In this study, the thickener sludge(PS-sludge) generated at total phosphorus(T-P) removal process was introduced into anaerobic digested activated sludge to examine the role of PS-sludge in immobilizing phosphorus and also in improving dewaterability of the mixed sludge. Maximum absorption capacity of phosphorus from the Langmuir isotherm plot was 9.3 mg/g-sludge(dry wt.) for PS-sludge. Experimental results observed T-P removal of 87% using a PS-sludge concentration of 1.66% TS(total solids), and the simultaneous decrease in COD(chemical oxygen demand). However the use of PS-sludge resulted in the deterioration of the dewaterability of mixed sludge by increasing the SRF(specific resistance to filtration). The results indicated that PS-sludge can further be used as absorbent media for T-P removal from the reject water, despite of the deterioration of the sludge dewaterability.
Key Words
Anaerobic digested activated sludge, Totoal Phosphorus Removal, Thickener sludge, Dewaterability, SRF
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