폴리아민과 PACI 혼합응집제를 이용한 정수처리효율 개선

한승우; 이철우; 강임석; Seung Woo Han; Chul Woo Lee; Lim Seok Kang

HWAHAK KONGHAK, Vol.41, No.3, 319-325, June, 2003

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폴리아민과 PACI 혼합응집제를 이용한 정수처리효율 개선

Improvement of the Effectiveness of Drinking Water Treatment Using a Mixture of Polyamine and PACl

한승우^†, 이철우, 강임석

부경대학교 환경공학과, 608-737 부산시 남구 대연3동 566-1

Seung Woo Han^†, Chul Woo Lee, and Lim Seok Kang

Department of Environmental Engineering, Pukyong National University, 599-1 Daeyeon3-dong, Nam-gu, Busan 608-739, Korea

E-mail:

초록

정수처리 공정에서의 응집제 사용량을 절감시키고 정수처리 효율의 증대를 위한 연구에서 PACA의 제조 원료로 고분자성 알루미늄종을 가장 많이 함유한 PACI(Al2O3 16.5%)를 2배 희석한 것과 폴리아민류 고분자응집제를 0.5 mg/L(as polymer)을 혼합하였을 때 탁도 및 유기물 제거효과가 가장 우수하였으며, 제조된 응집제인 PACA의 보관기간에 따른 숙성의 영향은 거의 나타나지 않았다. 폴리아민류 유기성 고분자 응집에의 혼합사용과 병용사용의 경우를 비교하였을 때, 양쪽 모두 탁도 및 유기물 제거측면에 있어서 유사한 경향을 나타내어 혼합사용에 따른 유지관리 및 경제적인 정수처리 운영을 기할 수 있을 것이라 판단된다. 제조된 PACA와 alum 및 PACI에 대한 jar test 실험 및 pilot plant를 이용한 응집실험 결과, PACA의 경우에 있어 응집제 주입량은 60%정도 절감으로도 alum 및 PACI 응집제를 단독으로 사용하였을 때 보다 PACA를 사용하였을 때가 유사한 탁도 및 유기물 제거효율을 나타내었다.

In order to reduce the amount of alum and PACl coagulant and to improve the coagulation efficiency in water treatment process, an organic polymer and a polymeric inorganic coagulant were blended, which was named PACA(polyaluminum chloride amine) and their mixture was applied to treat drinking water. For the blended PACA, polyamine polymer as the organic polymer was injected into the PACl(as Al2O3 16.5%) 50% diluted with water in which the maximum amount of polymeric Al(III) species was contained. Also, from the result of coagulation tests to determine the optimum combination of the polyamine content with PACl, 0.5 mg/L of polyamine blended into PACl was found to be optimum. The blended PACA was stable during storing period, as indicating negligible aging effect. To compare the coagulation efficiency of PACA with alum and PACl coagulants, both jar test and pilot plant test were performed. The experimental results showed that the PACA coagulant was very effective for the removals of turbidity, organic matters, and algae. In addition, when comparing the optimum dosage of PACA coagulant with alum and PACl, the dosage of PACA coagulant was reduced by 60% for comparable coagulation efficiency.

Keywords:Coagulant;Polyamine;Alum;PACI (Polyaluminum Chloride);Mixture

[References]

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[1] Kang LS, Han SW, Jung CW, Korean J. Chem. Eng., 18(6), 965 (2001)

[2] Han SW, "Production and Application of Polymeric Inorganic Coagulants for Water Treatment," Ph.D. Dissertation, Pukyong National University, Busan Korea (2000)

[3] Letterman RD, Driscoll CT, J. AWWA., 80(4), 154 (1988)

[4] Cohen JM, Rourke GA, Woodward RL, J. AWWA, 50(4), 463 (1958)

[5] James CR, O'Melia CR, J. AWWA, 74(3), 148 (1982)

[6] Lee HJ, Kim JS, Kang LS, J. Korean Env. Sci. Soc., 7, 217 (1998)

[7] APHA, AWWA and WPCF, "Standard Method of the Examination of Water and Wastewater," 20th ed., Washington, D.C., U.S.A. (1999)

[8] Smith RM, Relation Among Equilibrium and Nonequilibrium Aqueous Species of Aluminum Hydroxy Complexes, Nonequilibrium Systems in Natural Water Chemistry (Gould, R.F. eds.), A.C.S. Advances in Chemistry Series No. 106, Washington, D.C., 250-279 (1971)

[9] Bersillon JL, Hsu PH, Fiessinger F, Soil Sci. Soc. Am. J., 51, 825 (1988)

[10] Parker DR, Bertsch DM, Environ. Sci. Technol., 15(5), 908 (1992)

[11] Shin MC, Choi SJ, Lee SH, Shin JH, Park LS, J. Korean Soc. Env. Eng., 19(8), 1043 (1997)

[12] Park KY, Lee K, Kim J, HWAHAK KONGHAK, 32(5), 742 (1994)