Songprasert, P Lim, BR Ahn, KH 2024-01-21T07:07:17Z 2024-01-21T07:07:17Z 2021-09-03 2004-05 0273-1223 https://pubs.kist.re.kr/handle/201004/137613 In the present study, the microbial community structure in an intermittently aerated submerged membrane bioreactor treating domestic wastewater was observed using the respiratory quinone profiles. The effects of different time interval for the aerobic and anoxic period on microbial community structure were examined with 60/90 min (Step 1) and 90/60 min (Step 2) as anoxic/aerobic periods. There was an observable slight difference in microbial community structure between Step 1 and Step 2 in the submerged membrane bioreactor. The dominant quinone types for Step 1 at both anoxic and aerobic conditions were UQ-8 followed by UQ-10 and MK-6, but those for Step 2 were UQ-8, MK-6 and MK-10(H-4). The microbial diversity of Step 1 and Step 2 based on the composition of all quinones was 10.6-11.7 and 13.3-13.0 for anoxic and aerobic conditions, respectively. The present results suggest that the introduction of ntermittent aeration into the submerged membrane bioreactor has little influence on the bacterial community structure. English IWA PUBLISHING WASTE-WATER TREATMENT ACTIVATED-SLUDGE Change of microbial community structure by respiratory quinone profile at intermittently aerated membrane bioreactor Article 10.2166/wst.2004.0788 1 WATER SCIENCE AND TECHNOLOGY, v.49, no.5-6, pp.459 - 465 WATER SCIENCE AND TECHNOLOGY 49 5-6 459 465 scie scopus 000221464200060 2-s2.0-2442606209 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article; Proceedings Paper WASTE-WATER TREATMENT ACTIVATED-SLUDGE intermittent aeration microbial community structure quinone profile submerged membrane bioreactor