【作者】 许旭昌；

【导师】 朱亮；

【作者基本信息】 河海大学 ， 环境工程， 2007， 硕士

【摘要】 膜生物反应器（MBR）是将生物降解作用与膜的高效分离技术结合而成的一种新型高效的污水处理工艺，具有出水水质好，容积负荷高，占地小，剩余污泥产量低，可自动运行，操作管理方便和运行费用低等优点。近年来，随着科学技术的发展，膜技术生产水平不断提高和成本大幅降低，使得膜法污水处理技术得以迅速推广。本文在膜生物反应器试验的基础上，再向反应器中投加粉末活性炭组成MBR-PAC系统进行深度处理生活污水试验，比较了两种工艺对生活污水中污染物质的去除效果；探讨了影响MBR-PAC系统处理效果的主要因素、膜污染的机理、过程和清洗方法；并对其经济性进行了初步分析。主要试验结果如下：1．MBR系统出水水质如下：BOD₅≤7mg/L左右；COD≤30mgL；氨氮≤1mg/L；浊度≤0.2NTU。MBR-PAC系统出水水质如下：BOD₅≤4mg/L；COD≤20mgL；氨氮≤0.3mg/L；浊度≤0.1NTU。可见，MBR-PAC耐冲击负荷能力强，出水更优质稳定。2．投加的PAC有效吸附并降解了易引起膜污染的物质，改善了污泥絮体结构和泥水混合液的可过滤性，减缓了膜污染。试验运行了6个月，气洗和出水反冲洗能有效对膜污染进行冲洗，维持较高的膜通量；长期运行膜污染严重时，化学药洗可使膜通量基本恢复。3．MBR-PAC工艺单位投资为5225元／m³·d，运行费用为1.613元／m³，具有广阔的运用前景。更多还原

【Abstract】 The Membrane Biological Reactor （MBR） which is combined membrane separation technology and biological treatment technology has lots of advantages, such as good effluent, less space occupancy, little excess sludge, high automatic control, simple operation, and low operating costs et al. In these years, with the developing of material science, the manufacture cost of membrane is lower and the technology of membrane has improved rapidly.In the paper, MBR with PAC research on treatment of domestic wastewater from primary MBR treatment was carried out for secondary effluent. During the operation, the removal efficiencies of pollutants and the main facts effect on performance of MBR-PAC reactor were investigated, the membrane fouling and wash in the process were discussed, and the economy of technology were initial analyzed.The main results showed that:1.The results in MBR showed that BOD₅≤7mg/L、COD≤30mg/L、NH₄⁺-N≤1mg/L and turbidity≤0.2NTU.The results about MBR-PAC showed that BOD₅≤4mg/L、COD≤20mg/L、NH₄⁺-N≤0.3mg/L and turbidity≤0.1NTU.MBR-PAC demonstrated a more excellent quality of outlet water and had stronger shock load.2. The casting PAC can adsorb and degrade some substances which cause membrane fouling, improve the structure of the sludge floc and the filtration character, and decrease membrane pollution. The air wash and backwash with the outlet could maintain high flux in a long time. And membrane flux could be recovered mainly with chemical cleaning.3. Economic analysis indicates that the project investment is 5 225 yuan/m³·d and the running expenditure is 1.613 yuan/m³. It has promising application foreground.更多还原