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.

다국어 초록 (Multilingual Abstract)

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.

참고문헌 (Reference)

• 1 Nichioka, M., "Production og poly-β-hydroxybutyrate by thermophilic cyanobacterium, Synechococcus sp. MA19, under phosphate-limited conditions" 23 (23): 1095-1099, 2001
• 2 Rodgers, M., "Production of polyhydroxybutyrate by activated sludge performing enhanced biological phosphorus removal" 101 (101): 1049-1053, 2010
• 3 Frison, N., "Production and use of short chain fatty acids to enhance the via-nitrate biological nutrients removal from anaerobic supernatant" 32 : 157-162, 2013
• 4 Fang, F, "Formation of aerobic granules and their PHB production at various substrate and ammonium concentration" 100 (100): 59-63, 2009
• 5 Ansari, S., "Cyanobacterial Polyhydroxybutyrate (PHB); Screening, Optimization and Characterization" 11 : e0158168-, 2016
• 6 Roysommuti, S, "Bioactive Nutraceuticals and Dietary Supplements in Neurological and Brain Disease" Academic Press 207-213, 2015
• 7 Kasemsap, C., "Batch production of polyhydroxyalkanoate by low-polyphosphate-content activated sludge at varying pH" 98 (98): 1020-1027, 2007
• 8 Miyake, M., "A thermophilic cyanobacterium, Synechococcus sp. MA19, Capable of Accumulating Poly-β-Hydroxybutyrate" 82 (82): 512-514, 1996
• 9 Balaji, S., "A review on production of poly β hydroxybutyrates from cyanobacteria for the production of bio plastics" 2 (2): 278-285, 2013
• 10 Frison, N., "A novel scheme for denitrifying biological phosphorus removal via nitrate from nutrient-rich anaerobic effluents in a short-cut sequencing batch reactor" 91 (91): 190-197, 2014