【作者】 刘斌；

【导师】 马金；

【作者基本信息】 清华大学 ， 市政工程， 2003， 硕士

【摘要】 小城市污水治理是我国城市环境整治的重要部分，本文通过大量的文献调研，结合山东省博兴县的实际情况，对小城市污水处理技术及各种工艺进行了分析和比较，得出结论：“复合水解池－生物滤池”是一种经济适用型的城市污水处理工艺，尤其适用于一些经济欠发达的小城市。一种污水处理工艺能否采用，其运行成本是其中一个重要因素，通过对“复合水解池－生物滤池”的成本分析表明，本工艺吨水运行成本仅为0.22元，大大低于其他二级污水处理工艺。本论文通过对“复合水解池－生物滤池”工艺的试验研究表明，对于水解工艺来说，合适的水力停留时间为4h；处理生活污水，水解段对CODCr的去除率为43-50%，对SS的去除率为54-63%；整体工艺对CODCr的去除率平均为71.3%，对SS的去除率平均为86%，对NH3-N的去除率平均为42.2%。小城市污水治理往往受资金及管理水平所限而难以实施，即使建成了，往往不能正常运行。BOT模式是近年来国内兴起的一种建设模式，本文结合博兴污水厂的建设对BOT用于小城市污水治理的模式进行了分析，得出：采用BOT模式建设小城市污水厂，是一种可行的、值得推荐的模式。博兴县污水厂经过启动、调试及试运行，最终出水CODCr为30-60mg/L，BOD5为5-10mg/L，SS为10-20mg/L，已达到工艺设计要求，满足《城镇污水处理厂污染物排放标准》（GB18918－2002）中的二级标准。更多还原

【Abstract】 Waste-water treatment for small cities is an important part of city environmental protection in China. Through analysis and comparison of wastewater treatment technologies and processes based on practical case of Boxing county Shandong province, such conclusion is got that hybrid hydrolytic tank-biofilter is an economical and appropriate waste-water treatment technology for cities, which is suitable for small cities. Operational cost is an important factor to determine whether wastewater treatment will be adopted or not. Operational cost of hybrid hydrolytic tank-biofilter is only ￥0.22, which is fairly lower than other secondary waste-water treatment processes.Through research on hybrid hydrolytic tank-biofilter process, it shows that: the most suitable HRT is 4hr for hydrolytic process; CODCr and SS removal rate in hydrolytic tank is respectively ranging 43%~50% and 54%~63% when treating municipal wastewater; CODCr, SS and NH3-N removal rate of whole process is respectively 71.3% , 56% and 42.2%.Wastewater treatment for small cities is limited to fund and management. The operational consult is not gratifying even if the treatment establishment is built. Based on analysis of BOT investment model for environmental protection and normal course of WWTP used hybrid hydrolytic tank-biofilter process, it is feasible to build small city WWTP with BOT investment model which is precondition of WWTP operation.The whole course of Boxing WWTP Startup operation is 30 days, and the result is: final effluent CODCr ranging 30~60mg/L, final effluent BOD5 ranging 5~10mg/L, effluent SS ranging 10~20mg/L. The result reaches secondary standard of discharge standard of pollutants for municipal wastewater treatment plant(GB 18918-2002).更多还原