순차적 혐기-호기 전환법에 의한 남조류 Synechococcus sp.의 생물학적 인 제거 가능성 평가 (Study on the Possibility of Biological Phosphorus Removal through Anaerobic-Aerobic Method by Cyanobacteria Synechococcus sp.)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 36권 / 8호 / 731 ~ 736페이지
· 저자명 : 유미영, 박종진, 황선진

초록

The A2O process, which is used to treat most of the wastewater generated in Korea, induces the luxury uptake ofphosphorus-accumulating organisms (PAO) through anaerobic-aerobic conversion. Moreover, it can remove phosphorusby wasting microorganisms containing large amounts of phosphorus. However, when the nitrate in the return sludge entersthe anaerobic tank, the diminished reducing power of the anaerobic tank inhibits phosphorus release, which limits thephosphorus removal efficiency. In this study, the possibility of enhanced phosphorus removal is explored under theanaerobic-aerobic method by using the cyanobacterium Synechococcus sp., which can synthesize polyhydroxybutyrate(PHB) like PAO. If Synechococcus sp. can remove excess phosphorus according to the same mechanism as PAO, it canpossibly have a synergistic effect on phosphorus removal through photosynthesis metabolism as well as luxury-uptakedue to anaerobic-aerobic conversion. The study results indicate that there was no significant difference in growth andcarbon and phosphorus removal efficiencies, regardless of exposure to anaerobic conditions. Therefore, it the anaerobiccondition can be considered to not inhibit the growth and metabolism of Synechococcus sp. Under anaerobic conditions,Synechococcus sp. released 28 mg-P/g-MLSS/day of phosphorus, which is lower than the amount released by PAObacteria. There was no significant difference in the amounts of phosphorus removal between the anaerobic-aerobicconversion experiment and the control. In addition, the trend of carbon consumption was not consistent with the trendof phosphorus release. Therefore, at the very least, phosphorus release by Synechococcus sp. might follow a differentpathway, or Synechococcus sp. does not release phosphorus, unlike PAO. Therefore, according to the results of this study,the application of Synechococcus sp. for phosphorus removal, similarly to PAO bacteria, through the anaerobic-aerobicconversion method is inappropriate.

영어초록

The A2O process, which is used to treat most of the wastewater generated in Korea, induces the luxury uptake ofphosphorus-accumulating organisms (PAO) through anaerobic-aerobic conversion. Moreover, it can remove phosphorusby wasting microorganisms containing large amounts of phosphorus. However, when the nitrate in the return sludge entersthe anaerobic tank, the diminished reducing power of the anaerobic tank inhibits phosphorus release, which limits thephosphorus removal efficiency. In this study, the possibility of enhanced phosphorus removal is explored under theanaerobic-aerobic method by using the cyanobacterium Synechococcus sp., which can synthesize polyhydroxybutyrate(PHB) like PAO. If Synechococcus sp. can remove excess phosphorus according to the same mechanism as PAO, it canpossibly have a synergistic effect on phosphorus removal through photosynthesis metabolism as well as luxury-uptakedue to anaerobic-aerobic conversion. The study results indicate that there was no significant difference in growth andcarbon and phosphorus removal efficiencies, regardless of exposure to anaerobic conditions. Therefore, it the anaerobiccondition can be considered to not inhibit the growth and metabolism of Synechococcus sp. Under anaerobic conditions,Synechococcus sp. released 28 mg-P/g-MLSS/day of phosphorus, which is lower than the amount released by PAObacteria. There was no significant difference in the amounts of phosphorus removal between the anaerobic-aerobicconversion experiment and the control. In addition, the trend of carbon consumption was not consistent with the trendof phosphorus release. Therefore, at the very least, phosphorus release by Synechococcus sp. might follow a differentpathway, or Synechococcus sp. does not release phosphorus, unlike PAO. Therefore, according to the results of this study,the application of Synechococcus sp. for phosphorus removal, similarly to PAO bacteria, through the anaerobic-aerobicconversion method is inappropriate.

참고자료

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