Lim, BR Ahn, KH 2024-01-21T06:39:05Z 2024-01-21T06:39:05Z 2021-09-04 2004-08 0022-1260 https://pubs.kist.re.kr/handle/201004/137376 The objective of this study was to investigate the microbial community structure of the biofouling film formed on hollow-fiber membrane surfaces in the submerged membrane bioreactor (SMBR) with a nitrification-denitrification process. In this experiment, aeration was conducted intermittently (60 min off, 90 min on) cyclic anoxic and oxic conditions in the SMBR. The dominant quinone types of biofilm on the membrane surface in an intermittently aerated SMBR were ubiquinone (UQs)-8, -10, followed by menaquinones (MKs)-8(H-4), -8(H-2) and -7, but those of suspended microorganisms were UQ-8, UQ-10 followed by MKs-8, -9(H-4) and -6. The change in quinone profiles of biofilm on the membrane surface suggested that UQ-9, MK-7, MK-8(H-2) and MK-8(H-2) contributed to microbiological fouling in the intermittently aerated SMBR treating domestic wastewater. The microbial diversities of suspended microorganisms and biofilm, calculated based on the composition of all quinones, were 9.5 and 10.9, respectively. English MICROBIOL RES FOUNDATION ACTIVATED-SLUDGE BACTERIA Analysis of microbial community structure in a biofilm on membrane surface in the submerged membrane bioreactor treating domestic wastewater on the basis of respiratory quinone profiles Article 10.2323/jgam.50.197 1 JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY, v.50, no.4, pp.197 - 202 JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY 50 4 197 202 scie scopus 000226773200003 2-s2.0-11044232994 Biotechnology & Applied Microbiology Microbiology Biotechnology & Applied Microbiology Microbiology Article ACTIVATED-SLUDGE BACTERIA biofilm biofouling microbial community structure quinone profile submerged membrane bioreactor