Cho, ES Ahn, KH Molof, AH 2024-01-21T07:07:14Z 2024-01-21T07:07:14Z 2021-09-03 2004-05 0273-1223 https://pubs.kist.re.kr/handle/201004/137612 The sequentially combined carbon (SCC) of methanol and acetic acid was used for the biological nutrient removal (BNR). Its BNR performance was compared with methanol or acetic acid as a sole carbon substrate. Compared to the sole carbon substrate, the use of SCC demonstrated the highest overall TIN removal of 98.3% at a COD ratio of 30 mg COD/l of methanol/50 mg CDO/l of acetic acid. Furthermore, denitrification was more enhanced when methanol was used as one of the SCC, rather than as a sole carbon source. Complete phosphorus removal was accomplished with a non-detectable o-P concentration when SCC was added. This research also showed that aerobic denitrifiers appear to prefer acetic acid to methanol, and the amount of poly-beta-hydroxybutyrate (PHB) stored by P accumulating organisms (PAOs) using acetic acid in the anoxic zone could be another important factor in improving the aerobic denitrification. The SCC was a very favorable carbon source for the aerobic denitrification since acetic acid was utilized more efficiently for P-release in accordance with increase of PHB stored in the cell of PAOs by removing nitrogen first using methanol. English I W A PUBLISHING PHOSPHATE NUTRIENT SLUDGE Comparison of sequentially combined carbon with sole carbon in denitrification and biological phosphorus removal Article 10.2166/wst.2004.0761 1 WATER SCIENCE AND TECHNOLOGY, v.49, no.5-6, pp.251 - 256 WATER SCIENCE AND TECHNOLOGY 49 5-6 251 256 scie scopus 000221464200033 2-s2.0-2442484400 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article; Proceedings Paper PHOSPHATE NUTRIENT SLUDGE acetic acid aerobic denitrification denitrifying phosphorus removing bacteria methanol poly-beta-hydroxybutyrate sequentially combined carbon