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권재현(Jae Hyun Kwon),구석본(Sek Bon Koo),곽복식(Bok Sik Kwak),류성호(Sung Ho Ryu) 한국물환경학회 2001 한국물환경학회지 Vol.17 No.1
This study was conducted to illuminate the effectiveness of dual-conditioning compared with that of conventional mono-conditioning. In this method, both cationic and anionic polymer were successively dosed into water treatment plant sludge for dewaterability improvement. As results, sludge dewaterability was more enhanced by dual-conditioning method than any other mono-conditioning method using cationic polymer as well as anionic polymer. As sludge pH increased using NaOH. sludge properties including turbidity, viscosity, particle size and zeta-potential were more deteriorated. This made poor dewaterability and also increased optimal polymer dosage. Sludge properties, especially zeta-potential affected the effectiveness of dual-conditioning as well. In case zeta potential became under about -20㎷, dewatering performance by dual-conditioning method was similar to that by mono-conditioning method even though dosage of dual polymer was more lower compared with that of mono polymer. Therefore, dual-conditioning method adapted in this study might be less expensive than conventional mono-polymer conditioning method as depended on zeta-potential.
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구석본, 곽복식, 권재현 경성대학교 환경문제연구소 2000 環境硏報 Vol.10 No.1
The most important thing in sludge treatment is to reduce the volume of sludge. To achieve this purpose, sludge is usually dewatered after conditioning by polymer. For efficient dewatering and its economic operation, polymer should be dosed properly. Therefore, the possibility of filtrate viscosity as a tool for the optimization of polymer dose in waterworks sludge conditioning was estimated in this study. In conclusion, it may be effective and accuracy to use filtrate viscosity as a control parameter to determine the optimum dose of polymer in sludge dewatering. Especially in case of cationic polymer conditioning, filtrate viscosity can be used effectively for this purpose. However, In contrast filtrate viscosity can not be utilized as a control tool if nonionic or anionic polymer were dosed.
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류성호,권재현,구석본 대한상하수도학회 2001 상하수도학회지 Vol.15 No.1
The most important thing in sludge treatment is to reduce the volume of sludge. To achieve this purpose, sludge origin, sludge properties and factors which are affecting dewatering should be identified. Sludge characteristics including dewatering varies according to raw water qualities and operating conditions of waterworks because sludge is produced through water purification. Therefore, in this study, sludge properties and dewaterability were respectively investigated for four seasons in order to illuminate the seasonal variation of sludge properties and dewaterability. Sludge dewaterability was evaluated by means of SRF and cake solid content, C_k using both lab scaled pressure filter and full scaled belt press. In conclusion, solid content of sludge generated in Autumn showed 8.28%, higher than that of any other season. Most settleable and dewaterable sludge may be produced in Autumn owing to the least contents of volatile solid(VS) and minimum ratio of alum to turbidity(ALT ratio) in four seasons. It considered that both VS/TS ratio of sludge and ALT ratio affected significantly sludge dewatering.
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곽복식,권재현,구석본 대한상하수도학회 2001 상하수도학회지 Vol.15 No.5
The major objective of sludge treatment is to reduce the volume of sludge. To achieve this purpose, sludge is usually dewatered after conditioning by polymer. For the efficient and economic operation of dewatering facility, polymer should be dosed properly. Therefore, in this study, the Theological characteristics of waterworks sludge was investigated to evaluate the potential of control parameter in polymer dose assessment. In conclusion, it might be effective and accurate to use filtrate viscosity as a control parameter to determine the optimum dose of polymer in sludge dewatering. As a result of this study, in case of cationic polymer, it could be used effectively for this purpose regardless of the properly of waterworks sludge.
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