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A Study on the Operation Condition for Carbon-Nitrogen Removal in Wastewater and Sludge Reduction using PVA-gel Immobilized Microorganism  

Lee, Jin-Sook (서울시립대학교 환경공학부)
Park, Hyung-Whan (서울시립대학교 환경공학부)
Nam, Duk-Hyun (서울시립대학교 환경공학부)
Park, Chul-Hwi (서울시립대학교 환경공학부)
Jung, In-Ho (서울시립대학교 환경공학부)
Yoo, Young-Kwan (Enviro(주))
Publication Information
Journal of Korean Society of Water and Wastewater / v.20, no.6, 2006 , pp. 875-883 More about this Journal
Abstract
The carbon and nitrogen removal process using PVA-gel (Polyvinyl Alcohol) immobilized microorganisms was studied. The process has been operated under diverse process conditions for 12 months. The process consists of denitrification with internal recycle of 300%, nitrification, aerobic digestion reactors and settling tank. Nitrificatoin and nitrogen removal efficiency according to gel packing ratio and temperature were studied. Yield for Heterotrophs ($Y_H$), decay coefficient for Heterotrophs($b_H$) in aerobic digestion reactor were determined to seize sludge reduction mechanism and compared with typical data of activated sludge process. Then SRT in aerobic digestion reactor was determined on an experimental basis and sludge reduction efficiency was calculated. The process was implemented successfully with sludge reduction efficiency of 92.0~98.5% on a basis of biomass.
Keywords
PVA-gel; immobilization; nitrification; denitrification; sludge reduction; aerobic digestion;
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  • Reference
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