【作者】 许航；

【导师】 陈卫；

【作者基本信息】 河海大学 ， 环境工程， 2007， 硕士

【摘要】 我国现阶段正处于高速工业化和城市化的特殊时期，城市水资源短缺和水环境污染等造成城市供水需求矛盾日益加大，将会成为未来城市可持续发展的制约因素。当城市无法从本区域找到合适水源，且又无法从别的区域调水时，将城市生活污水的再生作为城市的第二水源也就成为了必然选择。 本论文主要研究工作与结论： 针对生活污水的水量、水质特点及排放特征，对比分析各种污水处理方法的优缺点，选用小型气提式生物接触氧化法为主的工艺流程作为分散处理生活污水及再生利用的有效方法。通过小型气提式接触氧化处理校园生活污水处理的研究，确定装置的合适运行工况，分析了系统的稳定性、抗冲击负荷能力及运行费用，为今后实际工程提供设计及运行参数。 试验研究表明，小型气提式接触氧化处理分散生活污水时，在气水比为16.8：1，水力负荷为4.8m³／（m³·d）时，对COD和NH₃-N平均去除率分别为80.1％和58％，出水COD、NH₃-N、TN、SS、pH、浊度、色度等指标均达到《城市杂用水水质标准》，满足城市再生水要求，独特的气提装置和蜂窝填料的联用，提高了装置的抗冲击负荷能力和生物处理系统的稳定性，确保出水水质。同时，其一体化集成、系列化设计，施工方便，运行费低，简化了传统接触氧化工艺，地埋式安装，不涉及占地和拆迁问题，对原有环境布局影响小，符合生态化理念。 为提高装置的使用价值，在工艺基础上增加化学除磷设施，选用AlCl₃作为絮凝剂，研究表明：除磷沉淀池的停留时间为25～30min时最佳，进水TP的浓度为2～4mg／L时，投加AlCl₃／TP质量比为8.6，进水的TP浓度为6mg／L时，投加AlCl₃／TP质量比上升到13.1，出水TP浓度均小于0.5mg／L。 在试验基础上，以中山陵景区紫金山庄别墅区生活污水再生工程为实例，通过对该工程的工艺设计、运行管理以及技术经济比较，论述了小型气提式接触氧化处理分散生活污水及再生利用的可行性，为将来的小型生活污水处理及再生工程提供了一定指导意义和参考价值。更多还原

【Abstract】 With the rapid industrialization and urbanization of our country, the more serious shortage of water resource and the deteriorating water pollution have aggravated the contradiction of demand and supply for water supply, which will be the key factor limiting the sustainable development in the future. If suitable water source in the establishing region or water diversion from other areas is unavailable, the regeneration and reuse of domestic wastewater will be the inevitable choice.The research works and conclusions of the paper:We select the small airlift bio-contact oxidation as the primary technical process to treat sanitary sewage and regeneration use decentralizedly, as the consideration of the quantity , the quality and the discharging characters of the sanitary sewage. The appropriate parameters were determined through experiment, and the operation stability, anti-impact loads and cost of the process were also analyzed, which provide designing and running parameters for practical projects in the future.The experiment showed: 80.1% COD and 58% NH₃-N can be removed by airlift bio-contact oxidation system under the conditions of air/water ration of 16.8 and the hydraulic loading of 4.8m³/（m³·d）. In the effluent, COD, NH₃-N, TN, SS, pH value, turbidity and chromaticity met "the Water quality standard for urban miscellaneous water consumption"（GB/T 18920-2002）. The unique design of airlift and media enhanced the anti-impact loading capability and the stability of the biological treatment system, moreover, the integration and serialization design brought convenient construction, low operation cost and simplified the traditional contact oxidation process. The underground installation, according with the ecological concept, was not involved with land occupying and house removing, thus had little effect on the environment layout.To improve the value of this equipment, AlCl₃ was chose to enhance chemical phosphorus removal. The HRT of sedimentation tank was 25-30min.The result indicated: when the concentration of TP in influent were 2-4mg/L and 6mg/L, the AlCl₃/TP ration were about 8.6 and 12 respectively, and the concentration of TP in effluent was Less than 0.5mg/L.Based on the design, operation and technical economic comparison of the更多还原