Lim, BR Ahn, KH Songprasert, P Lee, SH Kim, MJ 2024-01-21T07:34:51Z 2024-01-21T07:34:51Z 2021-09-02 2004-02-20 0011-9164 https://pubs.kist.re.kr/handle/201004/137844 The microbial community structure in an intermittently aerated submerged membrane bioreactor treating domestic wastewater was investigated using the respiratory quinone profiling method. The operating cycle consisted of feeding the domestic wastewater into a 90-min oxic condition and a 60-min anoxic condition. A slight difference was observed in the microbial community structure of the suspended microorganisms in anoxic and oxic conditions. The dominant quinone type of anoxic and oxic conditions was ubiquinone (UQ)-8 followed by UQ-10 and menaquinone (MK)-6. The quinone profiles of the suspended microorganisms in the intermittently aerated SMBR with anoxic and oxic cycling showed that Nitrosomonas species, Alcaligenes species, and Thiobacillus, the dominant quinone of there are UQ-8 actively contributed to the biological nitrification/denitrification. The microbial diversities of suspended microorganisms in the anoxic and oxic conditions calculated on the molar fraction basis of all quinone compositions were 8.79-10.38 and 10.03-11.82, respectively. English ELSEVIER ACTIVATED-SLUDGE RESPIRATORY QUINONES BACTERIA BIOFILTER Microbial community structure in an intermittently aerated submerged membrane bioreactor treating domestic wastewater Article 10.1016/S0011-9164(04)90050-1 1 DESALINATION, v.161, no.2, pp.145 - 153 DESALINATION 161 2 145 153 scie scopus 000220228400005 2-s2.0-1542715005 Engineering, Chemical Water Resources Engineering Water Resources Article ACTIVATED-SLUDGE RESPIRATORY QUINONES BACTERIA BIOFILTER intermittent aeration microbial community structure quinone profile submerged membrane bioreactor nitrification denitrification