【作者】 薛英文；

【导师】 程晓如； 董文楚；

【作者基本信息】 武汉大学 ， 环境工程， 2004， 硕士

【摘要】 根据新疆石河子市目前水资源及水环境的现状，分析了城市污水回用于农业(包括林业、草业)灌溉的可行性与必要性。针对该市城市污水浓度高的水质特点以及污水处理后既考虑农业回用，又考虑排入水库的实际情况。通过比较，选择SBR工艺进行了污水处理试验。试验表明：SBR工艺可有效地应用于处理高浓度城市污水，在试验条件下，COD、TP的去除率高达90％左右，TN、氨氮的去除率可达70％左右。另外，本工艺可根据污水不同的出路，调整运行方式，使出水达到污水综合一级排放标准和农田灌溉水质标准。得出了污水回用于农业灌溉和排放天然水体的运行参数。 城市污水回用于农业的最大障碍是重金属污染等问题，但活性污泥法对污水中重金属的去除率试验国内尚无报道。因此，试验还对SBR法去除重金属的情况进行了探讨。研究表明：SBR法对重金属汞、镉、铅均有较好的去除效果。当进水浓度满足城市下水道排放标准时，处理后，汞、铅的出水浓度可满足农灌标准，但镉的出水浓度仍不能满足农灌标准，尚需进一步处理。六价铬及总铬在其进水浓度满足城市下水道水质排放标准时，虽去除率不高，但其出水浓度仍可满足农田灌溉要求。更多还原

【Abstract】 According to the present conditions of the water resousce and water environment in Shehezi City, Xingjian, the thesis analyzes the feasibility and necessity of the wasterwater reuse in agriculture (including forestry and grassland ) irrigation. In the light of the high water contaminant level and the practical situation that after the wasterwater treatment, the agriculture reuse and the discharge into the reservoir should be considered, the sequencing batch reacater (SBR) technics is used in the wastewater treatment after comparison. The experiment indicates that the SBR technics functions effectively in the treatment of the heavy concentration wastewater. The reduction rate of chemical oxygen demanded (COD) and total phosphate (TP) could up to 90%, and that of total nitrogen (TN) and ammonial nitrogen (NH4-N) could reach 70% under experiment. In addition, the SBR technics can adjust the operation patterns on the basis of the different drainage ways of the wastewater, and so the treated water can meet the grade one of Integrate Wastewater Discharge Standard and the Standards for Irrigation Water Quality. The operational parameter, which is used when the wastewater reused in agriculture irrigation or discharged into reservoir, is also worked out there.The greastest obstacle to the wastewater’s reuse in agriculture irrigation is the heavy metal pollution and etc. But till now, there havan’t any report about the reduction rate experiment of the activated sludge process used to eliminate the heavy metal. Thus, this experiment also reasearched that the SBR technics functions to eliminate the heavy metal. The research states that the SBR technics can work well in the elimination of these heavy metal, such as mercury (Hg), cdmium (Cd) and lead (Pb), when the inflow concentration meets the standards for municipal wastewater discharge into sewer drainage, after treatment, mercury’s and lead’s outlet water concentration could reach the agriculture irrigation standards; But cdmium’s can’t, and it needs to be treated further. And so does the hexavalent chromium (Cr6+) and total chromium (Tr); even if their reduction rate are not so hige, their outlet water concentration still could reach the agriculture irrigation standards.更多还原