Song, Kyung-Guen Cho, Jinwoo Ahn, Kyu-Hong 2024-01-20T22:03:49Z 2024-01-20T22:03:49Z 2021-09-03 2009-01 1615-7591 https://pubs.kist.re.kr/handle/201004/132838 This study investigated the effects of internal recycling time mode and hydraulic retention time (HRT) on nutrient removal in the sequencing anoxic/anaerobic membrane bioreactor process. Denitrification and phosphorus release were reciprocally dependent on the anoxic/anaerobic time ratio (Ax/An). As Ax/An increased, nitrogen removal rate increased but phosphorus removal rate decreased. The increasing Ax/An provided the longer denitrification period so that the organic substrate were consumed more for denitrification rather than phosphorus release in the limited condition of readily biodegradable substrate. Decreasing HRT increased both nitrogen and phosphorus removal efficiency because as HRT decreased, food-to-microorganism loading ratio increased and thus enhanced the biological capacity and activity of denitrifying bacteria. This could be verified from the observation mixed liquor suspended solids concentration and specific denitrification rate. The change of Ax/An and HRT affected phosphorus removal more than nitrogen removal due to the limitation of favourable carbon source for phosphorus accumulating organisms. English SPRINGER WASTE-WATER TREATMENT ACTIVATED-SLUDGE NUTRIENT NITRATE SYSTEM SCALE Effects of internal recycling time mode and hydraulic retention time on biological nitrogen and phosphorus removal in a sequencing anoxic/anaerobic membrane bioreactor process Article 10.1007/s00449-008-0232-6 1 BIOPROCESS AND BIOSYSTEMS ENGINEERING, v.32, no.1, pp.135 - 142 BIOPROCESS AND BIOSYSTEMS ENGINEERING 32 1 135 142 scie scopus 000261950900015 2-s2.0-58149086879 Biotechnology & Applied Microbiology Engineering, Chemical Biotechnology & Applied Microbiology Engineering Article WASTE-WATER TREATMENT ACTIVATED-SLUDGE NUTRIENT NITRATE SYSTEM SCALE Sequencing anoxic/anaerobic membrane bioreactor Phosphorus removal Nitrogen removal Internal recycling time mode Hydraulic retention time