Browse > Article

Removal Characteristics of Total Coliforms in a Rotating Activated Bacillus Contactor Process  

Kim, Eung-Ho (School of Urban and Civil Engineering, Hongik University)
Cho, Yeon-Je (Seil Technology Co.)
Park, Seong-Joo (Department of Microbiology, College of Science, Daejeon University)
Shin, Kwang-Soo (Department of Microbiology, College of Science, Daejeon University)
Yim, Soo-Bin (School of Urban and Civil Engineering, Hongik University)
Park, Hyun-Ju (Korea Land Co.)
Publication Information
Journal of Korean Society on Water Environment / v.21, no.1, 2005 , pp. 73-78 More about this Journal
Abstract
This study was performed to examine the disinfection capability of a Rotating Activated Bacillus Contactor (RABC) system, in which the predominant species, Bacillus sp. was expected to have a removal or inactivation effect of total coliforms. In a settling test with mixtures of E. coli and Bacillus sp., a high removal of E. coli was observed at $20{\sim}40^{\circ}C$, while insignificant removal at $10^{\circ}C$. In a batch test, a 4.5% addition of Bacillus sp. to activated sludge considerably enhanced the removal effect of total coliforms, indicating Bacillus sp. played an important role in improving the settlability of the sludge and coliforms. In a pilot scale RABC system, the concentration of total colifroms reduced remarkably in the settling tank, suggesting that total coliforms in the RABC process were eliminated through coagulation and precipitation, probably due to extracellular polymeric substance (EPS) of Bacillus sp. The fraction of Bacillus sp. in the total cell count in the RABC process was in the range of 4.5%~6.3%. The majority (75%) of the Bacillus sp. in the RABC process was Bacillus subtilis which is known to enhance coagulation and precipitation by producing EPS. Hence, an adoption of a RABC process might be able to eliminate the disinfection unit process from a wastewater treatment system.
Keywords
Rotating Activated Bacillus Contactor(RABC) process; Total coliform; Bacillus sp.; Extracellular polymeric substance; Disinfection unit process;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 권기석, 정형진, 김건우, 정규영, 토양미생물이 생산하는 생 물응집제의 특성, 안동대학교 농업과학기술연구논문집, 5 (1999)
2 서현효, 김형갑, Bacillus sp. SK31 의 생물홉착제 홉착특성 및 생산, 한국토양환경학회지, 4(2), pp. 33-43 (1999)
3 환경부, 하수도시설기준 (1998)
4 환경부, 수질환경보전법 (2004)
5 환경부, 하수처리장 소독시설 설치사업 업무처리 일반지침 (2002)
6 김옹호, 조연제, 박성주, 신광수, 임수빈, 정진권, 망상형 회 전식 바실러스 접촉장치를 이용한 하수고도처리에 관한 연구, 한국물환경학회지, 20(2), pp. 190-195 (2003)
7 (주)세일기술, 홍익대학교, 망상형 회전식 바실러스 접촉장 치 (RABC)를 이용한 하수고도처리공법, 환경부 차세대 핵심환경기술개발사업 보고서 (2003)
8 환경부, 수질오염 공정시험법 (1999)