【作者】 李亮；

【导师】 黄种买；

【作者基本信息】 武汉大学 ， 环境工程， 2005， 硕士

【摘要】 尽管我国大城市已普遍建设大规模的污水处理厂,但中小城镇由于缺少资金,难于建设常规工艺的污水处理厂。本文针对中小城镇污水量小,污染物浓度低的特点,提出投资省、运行费用低的上流式厌氧污泥床（UASB）工艺和序批式活性污泥工艺（SBR）联用的生活污水处理工艺,并通过试验验证此联合工艺的可行性,尤其是UASB处理低浓度有机废水的小试及其运行的稳定性。 试验研究了温度,pH,容积负荷等不同影响因素对UASB工艺运行的影响,并得出了最佳运行工艺条件。试验表明,在水力停留时间4h的运行条件下,出水CODcr浓度36.05mg/L～95.99mg/L,达到国家《污水综合排放标准》（GB8978—1996）二级排放标准。试验还对UASB工艺稳定运行特性,抗冲击负荷性能进行了系统研究。试验表明UASB工艺二次启动快,运行稳定,对有机物去除效果好,抗冲击负荷能力强。以SBR作为UASB后续处理工艺,通过试验研究得到最佳工艺运行条件,在该运行条件下,氮磷得到了有效的去除,出水水质较好,水质透明,各项指标基本达到国家GB8978—1996中一级排放标准。 与常规二级处理工艺相比,UASB+SBR复合厌氧工艺建设规模灵活,投资少,运行费用低,管理方便。此外出水各项指标满足生活杂用及景观用水的条件,且CODcr,SS,NH₃-N等指标已基本满足我国工业循环冷却水的要求,从污水回用,节省水资源的角度上值得深入的研究。更多还原

【Abstract】 Although wastewater treatment plants in large scale have been builded in many large cities, more small cities can not afford the funds of building them. Aiming at the fact that the low concentration and the little amout of domestic sewage in small cities, this paper presents Upflow Anaerobic Sludge Blanket (UASB) as the first part in advance and SBR process to remove N ,P and CODcr. Then we testify its feasibility by experiment, especially the research in little scale and its stability.Some experiments on varying factors on UASB such as temperature, pH and we get the most suitable conditions.The results indicates when hydraulic retention time (HRT) is 4h, theconcentration of CODcr at exportation is 36.05mg/L~95.99mg/L and came to the second class of GB8978—1996.The results also indicated that the UASB working steadily and have good removal effect on organic matter .UASB has a excellent ability of bearing high impact loads. SBR as a process afterward can remove N, P effectively at the most suitable conditions we get through experiments. The water at exportation is perspective and CODcr, N and P measured with the fist class of GB8978-1996.Comparing with the secondary treatment process , the costs of construction and operation of UASB—SBR process is much lower. And every index of the ultimate water is approach to or measured with the demand in water used in life and landscape. Furthermore CODcr, SS and NH3 measured with the demand of cooling water in our country, so it is worth doing more completely research in wastewater reuse and saving up resource of water.更多还原