응집과 균질화가 팽화슬러지의 용존공기부상과 침전에 미치는 영향

• 영문명: Effect of Coagulation and Homogenization on the Dissolved Air Flotation and Sedimentation of Bulking Sludge
• 발행기관: 한국환경보건학회
• 저자명: Kim, Dong-Seog Park, Young-Seek
• 간행물 정보: 『1. 한국환경보건학회지』제33권 제1호, 68~74쪽, 전체 7쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2007.02.28

영문 초록

The objective of this study is to examine the effect of the coagulation and homogenization in bulking sludge thickening of paper manufacturing plant using DAF(Dissolved Air Flotation) and gravitational sedimentation. The effects of parameters such as dosage of coagulant and homogenization time were examined. The results showed that DAF and sedimentation was affected aluminum sulfate and anion polymer coagulant differently. At the optimum dosage of aluminum sulfate, thickening efficiency of DAF and sedimentation process were increase 1.25 time and 2.02 time, respectively. At the optimum dosage of anion polymer coagulant, thickening efficiency of DAF process was increase 1.35 time, but thickening efficiency at sedimentation was 1.06 time. When anion polymer coagulant of 0.5 mg/l was added in DAF process, water content of sludge was decreased from 96.6% to 90.7% in dewatering process using Buchner funnel test device. After homogenization(20500 rpm, 10 min), Sauter mean diameter of sludge floc was decreased from 631 μm to 427 μm, however increase of flotation efficiency by DAF was only 1.09 time.

키워드

sludge thickening dissolved air flotation bulking sludge sedimentation water content