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진양호소수의 효과적인 정수처리를 위한 최적응집제 주입량 결정 - 조류제거를 위한 응집제 주입효과 - KCI 등재

Determination of Optimum Coagulant Dosage for Effective Water Treatment of Chinyang Lake - The Effect of Coagulant Dosing on Removal of Algae -

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한국환경과학회지 (Journal of Environmental Science International)
한국환경과학회 (The Korean Environmental Sciences Society)
초록

This study was performed to determine the optimum coagulant dosing for effective treatment of raw water in Chinyang lake. Removal rates of algae and characteristics of the water according to coagulants dosage were investigated by treatment with Microcystis aeruginosa, which is a kind of blue-green algae, to the raw water below 5NTU. The coagulants dosage for maximum removal rate of algae were 30 ㎎/ℓ of Alum, 30 ㎎/ℓ of PAC and 10 ㎎/ℓ of PACS, respectively. The removal rate of algae in 30 ㎎/ℓ of PAC was highest as 85% compared with the other treatments. At the point of maximum removal rate of algae, the removal rates of turbidity were 34%, 66% and 22% in Alum, PAC and PACS, respectively. Residual Al was decreased depend upon decreasing turbidity in water by treatment of Alum or PAC, but decreased depend upon increasing turbidity in water by treatment of PACS. The removal rate of Mn2+ in water was high in the order of Alum, PAC and PACS treatment. And Fe2+ in water was not changed by treatment of these coagulants. Particle numbers distributions according to the particle size of suspended solids that were not precipitated at 8 min. of settling time after treatment of coagulants dosage for the maximum removal rate of algae were investigated. Most of the particle sizes were below 30 ㎛ and particle numbers distributions below 10 ㎛ were 64%, 56% and 66% by treatment of Alum, PAC and PACS, respectively. Zeta potential was in the range of -6.1∼-9.7 mV at optimum coagulants dosage for algae removal.

저자
  • 이원규(경남도청 환경정책과) | Won Kyu Lee
  • 조주식(순천대학교 농화학과) | Ju Sik Cho
  • 이홍재(경상대학교 농화학과) | Hong Jae Lee
  • 임영성(경상대학교 농화학과) | Young Sung Lim
  • 허종수(경상대학교 농화학과) | Jong Soo Heo