이재우 안규홍 이석헌 김일규 Daniel K. Cha 2024-01-21T06:33:00Z 2024-01-21T06:33:00Z 2021-09-06 2004-09 1225-7672 https://pubs.kist.re.kr/handle/201004/137264 Fatty acid methyl ester (FAME) technology was evaluated as a monitoring tool for quantification of Nocardia amarae causing a nuisance foaming problem in activated sludge process. The identified signature peak was 19:1 alcohol as a reliable unique peak to N. amarae. Chemostat study revealed that the distribution and quantity of fatty acid peaks were dependent on the growth stage of Nocardia. The FAME results were similar for two relatively high dilution rates; however, the amounts of signature peaks extracted from the 4 and 6 day cultures were significantly higher. This dependence of signature peaks on the physiological state of the organism may be a useful information to assess the health of microbial populations in activated sludge. A laboratory scale batch foaming potential experiment provided a critical foaming level depending on Nocardia population. This critical Nocardia level determined in this study was in terms of either the threshold filament intersections number or the threshold signature FAME amount. The threshold peak area of signature FAME (19:1 alcohol) and corresponding filament counts were 430PA/mg VSS and 1.45x106 intersections/g VSS, respectively. The threshold signature FAME level could be effectively applied as a criterion for diagnosing foam occurrence in activated sludge system. 대한상하수도학회 활성슬러지내 Nocardia 거품현상 진단을 위한 Fatty Acid Methyl Ester (FAME) 기술 Fatty acid methyl ester (FAME) technology for diagnosing Nocardia foaming in activated sludge Article 2 상하수도학회지, v.18, no.4, pp.480 - 485 상하수도학회지 18 4 480 485 kci ART001126161 FAME activated sludge foaming Nocardia amarae foaming potential FAME activated sludge foaming Nocardia amarae foaming potential FAME 활성슬러지 거품현상 Nocardia amarae 거품 포텐샬