Shin Hang-Sik, Lee Sang-Hyung, Nam Se-Yong, Park Myung-Gyun
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejon, Korea.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2003;38(10):2191-9. doi: 10.1081/ese-120023351.
In this research, package type BNR process was developed to remove nutrients as well as suspended solids from domestic sewage. The effect of HRT reduction of settler on the removal of pollutants as well as the role of DPBs at anoxic reactor were investigated. The proposed package system was composed of sludge denitrification tank, anaerobic, anoxic, oxic, and batch settler. This system could remove nitrogen and phosphorus effectively at low COD/N ratio and also remove SS more effectively than other ordinary BNR system having the conventional settlers. The removal efficiency of total nitrogen (T-N) in optimal condition was about 75.1% under the TCOD/TKN ratio as low as 5.7. The average concentration of the effluent TCOD, ortho-P, NH4+-N, NO3- -N and SS in the package type BNR system of 2 h settler retention time were 15.6. 1.38, 1.4, 10.3 and 3.9 mg/L, respectively. In anoxic state, denitrifying dephosphatation, that is uptaking phosphate by using nitrate-nitrogen as an electron acceptor was observed. The removed NO3- -N concentration by denitrifying dephosphatation was 1.62 mg NO3- -N/mg PO4(3-)-P.
本研究开发了B型包装式BNR工艺，用于去除生活污水中的营养物质和悬浮固体。研究了沉淀器水力停留时间（HRT）缩短对污染物去除的影响以及缺氧反应器中双聚磷酸盐（DPBs）的作用。所提出的成套系统由污泥反硝化池、厌氧池、缺氧池、好氧池和间歇沉淀器组成。该系统在低COD/N比下能有效去除氮和磷，并且比其他具有传统沉淀器的普通BNR系统更有效地去除悬浮物（SS）。在TCOD/TKN比低至5.7的最佳条件下，总氮（T-N）的去除效率约为75.1%。在沉淀器停留时间为2小时的B型包装式BNR系统中，出水的TCOD、正磷酸盐、NH4+-N、NO3--N和SS的平均浓度分别为15.6、1.38、1.4、10.3和3.9mg/L。在缺氧状态下，观察到反硝化聚磷作用，即利用硝酸盐氮作为电子受体吸收磷酸盐。反硝化聚磷作用去除的NO3--N浓度为1.62mg NO3--N/mg PO4(3-)-P。
