| In recent years, the ratio of COD to TN of the municipal sewage has on a declining curve. How to use the sewage effluent as a carbon source effectively in limited removal of nitrogen and phosphorous is paramount importance. With the development of biological technology and its application in the field of wastewater treatment applications, the current sewage treatment technologies, which must be used with low power consumption and less resources waste, require a more integrated approach to solve the problem of sewage treatment. Therefore, sustainable low-energy consumption of nitrogen and phosphorus removal wastewater treatment process research is of great practical significance. Denitrification and phosphorus removal technology is the new technology of biological phosphorus removal, which can save carbon and resource consumption.First of all, denitrifying phosphorus removal technology was studied at SBR reactor, and then investigated the effect of nitrate on denitrifying dephosphatation. On this basis, the study of the two-sludge baffled reactor start-up and the impact of different factors were discussed. At the same time, survey the BAF for further treatment of anoxic zone effluent.The main results of this thesis were as followings:Denitrification and phosphorus removal mainly depends on effective water mixed time, which affects on the HRT in anaerobic zone,sludge circulation ratio and nitrate concentrations in anoxic zoneUnder the condition of HRT =14.75h, R= 30℃,C/N=5.8～7.0, and sludge age 20d, the system could achieve the best treatment results. The removal efficiency and effluent concentration of TN, COD,NH4+-Nand PO43--P were observed to be 74.6%,91.85%,99.9%,70.43% and 6.24mg/L,23.7mg/L,0.03mg/L,1.43mg/L in average, respectively.These results also showed that denitrification and phosphorus removal technology in the baffled reactor was feasible.
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