화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.12, No.2, 67-77, June, 2006
Export Citation
소규모 하수처리를 위한 파일럿 규모 이중슬러지 KNRⓡ (Kwon's nutrient removal) 시스템의 영얌염류 제거성능 평가
Evaluation of the Nutrient Removal Performance of the Pilot-scale KNRⓡ (Kwon's Nutrient Removal) System with Dual Sludge for Small Sewage Treatment
안진영†, 권중천1, 김윤학1, 정유훈1, 김두언1, 유선호1, 김병우
  • 성균관대학교 공과대학 화학공학과, 440-746 경기도 수원시 장안구 천천동 300
  • 1(주)에코다임 기업부설연구소, 305-501 대전광역시 유성구 탑립동 대덕테크노밸리 DTV Post BI 306호
Jin-Young An†, Joong-Chun Kwon1, Yun-Hak Kim1, Yoo-Hoon Jeng1, Doo-Eon Kim1, Sun-Ho Ryu1, and Byung-Woo Kim
  • Department of Chemical Engineering, Sungkyunkwan University, 300 Cheoncheon-dong, Jangan-gu, Suwon,Gyeonggi-do, 440-746, Korea
  • 1R&D Center, Ecodigm Co., Ltd., 306 DTV Post BI, Tamnip-dong, Yuseong-gu,Daejeon, 305-501, Korea
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초록
본 연구에서 소규모 하수고도처리를 위한 이중슬러지(Dual sludge) KNRⓡ (Kwon's nutrient removal) 시스템이 개발되었다. KNRⓡ 시스템은 부유성장식 탈질미생물과 부착성장식 질산화미생물을 분리시킨 이중슬러지 공정으로 최초침전조, 혐기조, 무산소조, 농축조의 복합기능을 수행하는 UMBR (Upflow multi-layer bioreactor)과 펠렛형 담체가 충진된 호기성 담체조로 구성되어 있다. 소규모 하수처리시 본 개발공정의 안정성과 처리성능을 평가하기 위해 처리용량 50 m3/d 규모의 파일럿 플랜트를 고도처리 공정으로 개선공사 중인 처리용량 50 m3/d 규모의 실제 소규모 마을하수처리장에 적용하였다. UMBR과 담체조의 체류시간은 각각 4.7 h와 7.2h이었으며, 반응조 수온은 18.1 ~ 28.1℃이었다. 유입 하수량과 유입수의 BOD/N의 변동폭이 컸음에도 불구하고 파일럿 플랜트는 안정된 처리성능을 보였다. 전체 실험기간 중 처리수의 CODCr, CODMn, BOD5, TN, TP의 평균 농도는 11.0 mg/L, 8.8 mg/L, 4.2 mg/L, 3.5 mg/L, 9.8 mg/L, 0.87/0.17 mg/L (poly aluminium chloride(PAC) 투입/미투입)이었으며, 제거율을 각각 95.3%, 87.6%, 96.3%, 96.5%, 68.2%, 55.4/90.3% 이었다. 잉여슬러지 발생량은 A2O와 Bardenpho 등과 같은 단일슬러지를 이용하는 고도처리공정과 비교시 약 1.9~3.8 배 낮은 0.026 kg-DS/m3 and 0.220 kg-DS/kg-BOD로 나타났다.
A simple dual sludge process, called as KNRⓡ (Kwon's Nutrient Removal) system, was developed for small sewage treatment. It is a hybrid system that consists of an UMBR (Upflow multi-layer bioreactor) as anaerobic and anoxic reactor with suspended denitrifier and a post aerobic biofilm reactor, filled with pellet-like media, with attached nitrifier. To evaluate the stability and performance of this system for small sewage treatment, the pilot-scale KNRⓡ plant with a treatment capacity of 50 m3/d was practically applied to the actual sewage treatment plant, which was under retrofit construction during pilot plant operation, with a capacity of 50 m3/d in a small rural community. The HRTs of a UMBR and a post aerobic biofilm reactor were about 4.7 h and 7.2 h, respectively. The temperature in the reactor varied from 18.1℃ to 28.1℃. The pilot plant showed stable performance even though the pilot plant had been the severe fluctuation of influent flow rate and BOD/N ratio. During a whole period of this study, average concentrations of CODCr, CODMn, BOD5, TN, and TP in the final effluent obtained from this system were 11.0 mg/L, 8.8 mg/L, 4.2 mg/L, 3.5 mg/L, 9.8 mg/L, and 0.87/0.17 mg/L (with/without poly aluminium chloride(PAC)), which corresponded to a removal efficiency of 95.3%, 87.6%, 96.3%, 96.5%, 68.2%, and 55.4/90.3%, respectively. Excess sludge production rates were 0.026 kg-DS/m3-sewage and 0.220 kg-DS/kg-BOD lower 1.9 to 3.8 times than those in activated sludge based system such as A2O and Bardenpho.
Keywords:Upflow Multi-Layer Bioreactor (UMBR);Kwon's nutrient removal (KNR);biological nutrient removal (BNR);dual sludge;small sewage treatment plant
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