터널폐수 처리를 위한 최적응집제 결정

• Published in: 한국수처리학회지, 20(1) pp. 3 - 10
• Main Authors: 강용태, 송근관, 손정호, 김남경
• Format: Journal Article
• Language: Korean
• Published: 한국수처리학회 01.02.2012
• Subjects: 토목공학
• ISSN: 1225-7192; 2289-0076

The objective of this study is to evaluate the optimum coagulant for efficient treatment of tunneling wastewater with high turbidity concentration of 790-827 NTU. The pH and dosage of coagulant were changed for determination of optimum coagulant for tunneling wastewater treatment. Characteristics of influent tunneling wastewater were : pH 6.94∼7.05, Turbidity 790∼827 NTU and SS 543∼595 mg/L. Optimum coagulant was determined by jar-test using Alum, PSO-M, PAC, PACS-Ⅱ and FeCl3 as a coagulant. Based on the results of jar-test, optimum pH values were 9 for alum and PSO-M and 7 for PAC, PACS-Ⅱ and FeCl3, respectively. Optimum dosages of coagulants were : alum 70 mg/L, PSO-M 10 mg/L, PAC 50 mg/L, PACS-Ⅱ 10 mg/L and FeCl3 15 mg/L, respectively. Operation costs of alum, PSO-M, PAC, PACS-Ⅱ and FeCl3 were 127.6 won/kg, 118.9 won/kg, 15.5 won/kg, 3.3 won/kg and 3.6 won/kg, respectively. When considering optimum pH and dosage of coagulant, PACS-Ⅱ coagulant was more effective than Alum, PSO-M, PAC and FeCl3. KCI Citation Count: 1