연속 회분식 반응조 (SBR) 공정을 이용한 폐절삭유의 생물학적 처리능 평가 (Evaluation of biological treatment of cutting-oil wastes using sequencing batch reactor (SBR) process)

서지정보

· 발행기관 : 한국산학기술학회
· 수록지 정보 : 한국산학기술학회논문지 / 10권 / 7호 / 1654 ~ 1660페이지
· 저자명 : 백병도, 김창섭, 김준영, 장인성

초록

본 연구에서는 연속회분식반응조 (Sequencing Batch Reactor, SBR)를 이용하여 친환경성 절삭유라는 이름으로 시판되는 절삭유 2종 (H사, B사)의 생물학적 처리능을 평가하였다. H사의 절삭유를 응집/응결 전처리 (H1)하여 0.04-0.08kgCOD/kgMLSS·d의 F/M비로 SBR로 유입한 경우, BOD5와 CODCr의 평균 제거율은 각각 97%, 91%이상을 나타내었으며, T-N, T-P의 평균 제거율은 각각 76%, 81%이상을 나타내었다. B사의 절삭유를 희석한 후 (B1) 0.01-0.02kgCOD/kgMLSS·d의 F/M비에 맞추어 SBR로 유입한 경우, CODCr의 평균 제거율은 77% 이상을 나타내었다. 응집/응결 처리된 절삭유 (B2)를 0.01-0.04kgCOD/kgMLSS·d의 F/M비에 맞추어 유입한 경우, CODCr의 평균 제거율은 85%이상을 나타내었다. 이후 실제 처리장에서 폐절삭유를 처리할 때 오수와 합병하여 처리하는 상황을 반영하기 위하여 B2와 합성폐수를 혼합하여 (B3) 0.09-0.11kgCOD/kgMLSS·d의 F/M비에 맞추어 유입하였을 때, BOD5와 CODCr의 평균 제거율은 각각 97%, 98%이상을 나타내었고 T-N, T-P의 평균 제거율은 각각 79%, 76%이상을 나타내었다. 그리고 생물학적 처리를 거친 H1과 B3에 대한 각각의 유출수의 (CODCr-BOD5)/CODCr 비는 각각 85%와 61%정도로 난분해성 유기물이 잔존하고 있는 것을 확인할 수 있었다.

영어초록

Two different cutting-oils from H and B companies which are sold as an eco-friendly cutting-oils were selected and the biodegradability of these commercially available cutting-oils was evaluated by the sequencing batch reactor (SBR) processes. The cutting-oil wastes (H1) pre-treated by coagulation/flocculation was used as an influent to SBR. When the F/M ratio was operated 0.04 to 0.08kgCOD/kgMLSS·d, removals of BOD5 and CODCr were above 97% and 91%, respectively. T-N and T-P removals were above 76% and 81%, respectively. If the diluted cutting-oil wastes (B1) was used as an influent of the SBR, CODCr removals were above 77% at the F/M ratio of 0.01-0.02kgCOD/kgMLSS·d. After the cutting-oil wastes was treated by coagulation/ flocculation (B2), CODCr removals was above 85%. If the pre-treated cutting-oil wastes were mixed with a synthetic wastewater (B3) and fed into the SBR in order to mimic the real wastewater treatment plant situation, BOD5 and CODCr removals were above 97%, 91%, respectively. T-N and T-P removals were above 79% and 76%. The ratio between BOD5 and CODCr, (CODCr-BOD5)/CODCr, indicating the biodegradability of effluent of the SBR, was calculated to 85% and 61%. This means that significant amounts of non-readily-biodegradable organic compounds in the effluent of H1, B3 are still present.

참고자료

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