Ahmed, Zubair Lim, Byung-Ran Cho, Jinwoo Ahn, Kyu-Hong 2024-01-21T01:35:45Z 2024-01-21T01:35:45Z 2021-09-05 2007-01 1615-7591 https://pubs.kist.re.kr/handle/201004/134781 This study investigated the effects of the internal recycling rate on nutrients removal in a sequential anoxic/anaerobic membrane bioreactor (SAM). Microbial community structure in sludge from the SAM was studied using quinone profile method. Above 98% COD, 68% nitrogen, and 55% phosphorus removal efficiencies were achieved when the internal recycling rate was 2.5 times influent flow. At that rate, the optimum specific nitrate loading rate and COD/NO3-N ratio were found to be 2.24 mgNO(3)-N g(-1) MLSS h(-1) and 9.13, respectively. Batch tests demonstrated that anoxic condition suppressed phosphorus release, and that denitrification was also influenced by initial substrate concentration. Denitrification appeared to have some priority over phosphorus release for substrate uptake. Microbial community analysis revealed a predominance of the subclass beta-Proteobacteria. Furthermore, it was found that Rhodocyclus-related bacteria were efficient at phosphorus removal than Actinobacteria. English SPRINGER WASTE-WATER TREATMENT QUINONE PROFILE METHOD ACTIVATED-SLUDGE PHOSPHORUS REMOVAL RESPIRATORY QUINONES LIQUID-CHROMATOGRAPHY TREATMENT PLANTS PERFORMANCE NITRIFICATION SPECTROMETRY Effects of the internal recycling rate on biological nutrient removal and microbial community structure in a sequential anoxic/anaerobic membrane bioreactor Article 10.1007/s00449-006-0098-4 1 BIOPROCESS AND BIOSYSTEMS ENGINEERING, v.30, no.1, pp.61 - 69 BIOPROCESS AND BIOSYSTEMS ENGINEERING 30 1 61 69 scie scopus 000243031400006 2-s2.0-33845960313 Biotechnology & Applied Microbiology Engineering, Chemical Biotechnology & Applied Microbiology Engineering Article WASTE-WATER TREATMENT QUINONE PROFILE METHOD ACTIVATED-SLUDGE PHOSPHORUS REMOVAL RESPIRATORY QUINONES LIQUID-CHROMATOGRAPHY TREATMENT PLANTS PERFORMANCE NITRIFICATION SPECTROMETRY sequential anoxic/anaerobic membrane bioreactor (SAM)or sequential anoxic/anaerobic membrane bioreactor(SAM) recycling rate denitrification phosphorus release quinone profile COD/NO3 ratio