초록 ▼

연구개발 결과
단계별 연구수행내용
1단계 : 문헌고찰 및 외국기술 조사를 통한 현황 및 자료조사
2단계 : 실험실 실험을 통한 시설의 구조 도출 및 운전조건 확인
3단계 : 파일럿 제작 및 운전을 통한 현장 적용성 확인 및 실증 플랜트 제작 및 운전을 통한 신기술 자료 확보. 스케일업에 필요한 자료 확보
4단계 : 개발된 융합형 비점저감기술의 현장운전을 통한 성능검증 및 경제성 평가 현장 여건에 맞는 장치의 개발 및 운전에 필요한 운전매뉴얼과 신기술 확보

[총괄주관연구기관 연구과제]
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연구개발 결과
단계별 연구수행내용
1단계 : 문헌고찰 및 외국기술 조사를 통한 현황 및 자료조사
2단계 : 실험실 실험을 통한 시설의 구조 도출 및 운전조건 확인
3단계 : 파일럿 제작 및 운전을 통한 현장 적용성 확인 및 실증 플랜트 제작 및 운전을 통한 신기술 자료 확보. 스케일업에 필요한 자료 확보
4단계 : 개발된 융합형 비점저감기술의 현장운전을 통한 성능검증 및 경제성 평가 현장 여건에 맞는 장치의 개발 및 운전에 필요한 운전매뉴얼과 신기술 확보

[총괄주관연구기관 연구과제]
◦ 합류식우수관 월류수(CSO) 처리를 위한 시스템 개발(PM&C system)
- 실증규모 시설의 성능평가결과를 바탕으로 한 경제성 평가
- 개발기술의 현장 적용성 평가 및 문제점 및 해결방안 도출
- 신기술 신청 및 신기술 인증
◦ 분리식우수관 월류수(SSO) 처리를 위한 시스템 개발(SG Filter)
- 실증규모 시설의 운전을 통한 적용성 평가 및 실용화(보완)
- 현장설치 및 운영시 문제점 분석 및 유지관리방안 제시
- 기술 검증을 통한 매뉴얼 작성 및 보급
◦ 기존개발시설 성능 검증 및 보완(방류수 필터)
- 현장에 설치된 기존 공정의 비점오염물질 처리효율 검토
- 현장 적용결과를 바탕으로 한 성능 검증

[총괄위탁연구기관 연구과제]
◦ 농촌지역 토양유실방지 및 유사저감기술 개발
- 농경지 침투능 증대기술 개발
- 경사지 밭 배수로의 침사지 기능강화 배수블록 개발
- PAM과 Biopolymer를 이용한 경사지 토양유실 방지와 비점오염 저감기술 개발
- 식생대분석시스템 VFSMOD의 개발 및 농촌비점오염 저감시설 효과 모델링 기법 개발

Abstract ▼

Ⅳ. Results
- The advanced technology, HEC, was developed to treat quickly overflows from wastewater treatment plant(WWTP) in rainfall events.
- In HEC system, the optimum coagulant(Alum) addition ratio was 2.4∼4.0 Al/P and the optimum retention time was 20min without micro sand for overflow tr

Ⅳ. Results
- The advanced technology, HEC, was developed to treat quickly overflows from wastewater treatment plant(WWTP) in rainfall events.
- In HEC system, the optimum coagulant(Alum) addition ratio was 2.4∼4.0 Al/P and the optimum retention time was 20min without micro sand for overflow treatment and less than 40min for advanced wastewater treatment.
- In real scale plant operation, the removal rate of pollutants for overflow treatment was BOD 74.1%∼84.9%, SS 79.3%∼98.3%, TP 81%∼92%, and average pollutants removal rate for advance wastewater treatment was BOD 59.2%, SS 60.5%, TP 82.3%, respectively. Water quality of treated water was 5.3mg/l of BOD, 4.8mg/L of SS, 0.19mg/l of TP, it could be satisfied with stricted effluent standard.
- As a results of evaluation of hydraulic performance through the numerical modeling, stable rising rate and low shear force at the bottom of tank occurred. These advantages of hydraulic may be caused by the installation baffles(Last baffle induces that the flow can conflict with each other) and structural characteristics(Flow goes to the sedimentation in all direction) of the sedimentation tank. In addition, to recognize the importance of the end of the baffle, the angle and length was optimized using Design Of Experiment(DOE) and Response Surface Method(RSM). By comparing the residence time, we concluded that our model is more mixing flow model than others. Finally, as a results of analysis of In-line mixer, long diamond shape bump is more efficient for mixing than others (circle, square diamond). Besides, our In-line mixer model makes enough mix well with low energy under current hydraulic conditions.
- The covering materials of rice straw+chaff+PAM+Gypsum, rice straw+sawdust+PAM+Gypsum and rice straw+PAM+Gypsum were effective to reduction of muddy water and soil loss
- To increase the efficiency of subjected polymers, the supplemental calcium sources were explored. The highest soil infiltration was measured in the soil treated with biopolymer and gypsum, and the runoff was reduced with the same treated soil. Addition of PAM mixed with gypsum indicated the highest reduction of soil erosion compared to other treatments or combination. Our results showed that the use of biopolymer can be an alternative to commercial polyacrylamide which is well known as a soil amendment for soil erosion control. Additionally, the supplemental use of gypsum with polymer may be useful to increase the effectiveness of polymers for soil erosion control.
- In the first year of 3rd tier research, a module capable of simulation of continuous rainfall and its effects on sediment reduction of vegetative filter strips using Web GIS-based VFSMOD system was developed. In addition, SWAT SD-HRU module and VFSMOD model were used to evaluate effects of sediment reduction of surface cover with PAM and straw mat. In the second year of 3rd tier research, users' manual and multi-media documents were developed using the Web GIS-based VFS system, which has been developed from 2nd tier to 1st year of 3rd tier research. Also, BMP simulation manual was developed to evaluate effects of agricultural management practices on water quality improvement.