Choi, YS Shin, EB Lee, YD 2024-01-21T20:12:33Z 2024-01-21T20:12:33Z 2021-09-05 1996-01 0273-1223 https://pubs.kist.re.kr/handle/201004/144839 In this investigation, phosphorus removal experiment was conducted in a single reactor combining anaerobic and aerobic conditions. Attempts have been made to delineate phosphorus and organic removal mechanisms and to evaluate the removal efficiencies with different internal recycle ratios, N/P ratios and varying SRT conditions. The removal efficiencies of TOC, BOD and COD were observed to be higher than 95%, 90% and 90% in all runs, respectively. It is Further estimated that the optimal operational conditions for phosphorus removal are observed when the aerobic internal recycle rate is 100% with the inlet height 0.2H. The percent removal efficiencies were 92% for T-P and 90% for PO4-P. While, large differences in the removal of phosphorus with N/P ratios were observed; at influent TKN/T-P of 2.5, 3.6 and 5.1 removal efficiencies for T-P were 89%, 68% and 56%, respectively. Those removal efficiencies decreased as the N/P ratios increase in wastewater. In case of SRT, high removal efficiencies are observed with the solids retention time of 10 days rather than with SRT's of 5 or 20 days. These results indicate this new process, KNCR (Kist Nutrient Removal Compact Reactor), to be an excellent means of reducing phosphorus emmissions into the environment. Copyright (C) 1996 IAWQ. English PERGAMON-ELSEVIER SCIENCE LTD Biological phosphorus removal from wastewater in a single reactor combining anaerobic and aerobic conditions Article 10.1016/0273-1223(96)00508-2 1 WATER SCIENCE AND TECHNOLOGY, v.34, no.1-2, pp.179 - 186 WATER SCIENCE AND TECHNOLOGY 34 1-2 179 186 scie scopus A1996VK96000023 2-s2.0-0029839550 Engineering, Environmental Environmental Sciences Water Resources Engineering Environmental Sciences & Ecology Water Resources Article; Proceedings Paper anaerobic and aerobic zone biological phosphorus removal internal recycle ratio nitrogen/phosphorus ratio single reactor solids retention time