응집제 자동주입장치를 이용한 소화슬러지의 탈수효율 향상 = Improvement of Dewatering Efficiency for Sewage Digested Sludge by Using an Automatic Coagulant Feeding System

국문 초록 (Abstract)

본 연구는 하수처리장에서 발생되는 소화슬러지의 탈수성 향상을 위한 응집제 자동주입시스템과 기존 시스템의 탈수케이크 함수율 및 응집제 주입량에 미치는 영향을 비교·평가하는데 그 목적이 있다. 고분자 응집제 주입율은 기존 시스템에서 운영하고 있는 유입슬러지량 대비 고분자 응집제주입율인 14%를 기준으로 9%까지 점차적으로 낮추어 가면서 실험을 실시하였다. 실험결과 하수슬러지 탈수시 응집제 자동주입시스템이 기존시스템에 비해 함수율 및 약품주입량을 효과적으로 저감시킬 뿐만 아니라 중앙제어실을 통한 실시간 모니터링이 가능하므로 인력감축 유도 및 공정자동화에도 기여할 수 있을 것으로 판단된다.

다국어 초록 (Multilingual Abstract)

The purpose of this research was to evaluate the effects on enhanced sewage digested sludge dewatering and compare polymer dosage reduction between an automatic coagulant feeding system and a conventional system. The polymer dosage rate per sludge quantity was adjusted from 9% to 14% based on coagulant dosage of the conventional system. The results of this study indicate that the automatic coagulant feeding system not only could be effectively reduced the moisture contents and polymer dosage in the sewage sludge dewatering but also made the workforce reduction and automatic dewatering by real-time monitoring at central control room of sewage treatment plant more than a conventional system.

참고문헌 (Reference)

1 정병길, "이중주파수 초음파와 알칼리를 이용한 잉여슬러지의 전처리와 메탄생성특성" 한국폐기물자원순환학회 23 (23): 565-573, 2006

2 Clark, M. M., "Selection And Design Of Mixing Processes For Coagulation" American Water Works Association 1994

3 Kim, D.-H., "Research of Polymer Dosage Control and Return Flow Loads" Inje University 2010

4 Latimer, R. J., "Pilot Scale Comparison of Static Mixers and Backmix Reactors for Water Treatment" American Water Works Association 705-740, 1998

5 Ministry of Environment, "Official Water Quality Test Method, Notice No. 2011-103" 2011

6 Ministry of Environment, "Official Wastes Test Method, Notice No. 2011-3" 2011

7 Appiah, A., "Mixing for Coagulation: Organic Polymers, Static Mixers and Molding, Chemical Water and Wastewater Treatment IV" Springer- Verlag 3-15, 1998

8 Burke, J. C., "Effectiveness of Static Mixers for Enhanced Coagulation" Georgia Institute of Technology 1996

9 Wang, S.-H., "Characteristics of Mixing and Coagulation in an Inline Flash Mixer for Wastewater Treatment" Chonnam National University 2007

10 Kong, F., "Characteristics of Mixing and Coagulation in an Inline Coagulant Mixing System" Chonnam National University 2007

11 Park, J.-I., "Characteristics of Flow and Mixing in SMX Type Inline Mixers" Chonnam National University 2007

12 Song, H.-S., "Auto-control of Polymer Dose for Efficient Dewatering of Sewage Sludge" Inje University 2008

13 Kim, Y.-H., "A Study of the Flow and Mixing Characteristics in Inline Mixers for Water Treatment" Yosu National University 2005

14 Ministry of Environment, "2010 Wastewater Treatment Facility Current State" 2011