• 대한환경공학회지
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• 제22권12호
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• pp.2135-2139
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• 2000

시아노구아니딘-포름알데히드 수지에 의한 음이온성 콜로이드 입자의 응집현상은 음이온성 입자의 표면전하와 디아미노메틸렌우레아(diaminomethylene urea: DU) 이온과의 전기적인 작용에 기인한다고 보고되어 있다. 본 논문에서는 음이온성 염료폐수를 응집처리하기 위하여 100~500 nm의 양이온성 시아노구아니딘-포름알데히드 수지를 합성하였고, 응집제 수용액의 pH가 낮을수록 응집제의 Zeta potential은 높게 측정되었다. 농도 0.4 g/L 반응성 염료폐수를 응집처리하였을 경우 pH가 3, 5, 7, 9, 11 중에서 pH가 3인 조건이 다른 pH조건보다 COD, 색도 제거율이 높게 나타났으며, pH 3인 조건에서 400 ppm 주입시 COD 74%, 색도 90% 정도 제거할 수 있었다.

• 한국산업융합학회 논문집
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• 제9권2호
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• pp.111-116
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• 2006

This study provides the optimal conditions treating with the coagulation process and the other chemical treatment processes for dyeing wastewater, especially various dyeing complex wastewater. The results are shown as follows: 1. Optimum reaction condition of pH for ferrous sulfate was the range of 9 to 12. And when 3,000ppm(mg/l) of ferrous sulfate was dosed, the maximum $COD_{Mn}$ removal rate was approximately 40%. 2. In case of ferrous chloride and Bittern as coagulants, optimum pH range was 10 to 11. And maximum $COD_{Mn}$ removal rate was approximately 46% to 50% for dose of 2,000ppm(mg/l) to 6,000 ppm. 3. It is confirmed that the activated sludge process following coagulation precipitation method provides better treatment efficiency than the coagulation precipitation method following the activated sludge process. 4. The purpose of this study was to produce CGF (Cyanoguanidineformaldehyde resin) by organic compounds. 5. The complex coagulation agent by this study is the most economical coagulant with Alum(aluminum sulfate) and the removal efficiency is approximately 54% with 1,000ppm(mg/l) of pH range 6 to 7.