【作者】 李鸿敬；

【导师】 顾平；

【作者基本信息】 天津大学 ， 环境工程， 2003， 硕士

【摘要】 水源污染的加剧和饮用水质标准的日益严格，使传统给水处理工艺受到了严峻挑战，因而发展新的微污染水处理技术及设备已成为当务之急。膜分离被认为是当今获得优质安全饮用水的重要技术之一，近年来由于膜材料价格的下降和性能的改善在水处理领域得到了广泛关注。在此背景下，微滤工艺具有工作压力低、出水水质稳定、易实现自动控制等特点而成为给水处理领域研究的热点。研究探讨基于微滤工艺的膜混凝反应器（MCR）的运行可靠性、生产性规模MCR的设计方法及其现阶段的经济合理性，对实际工程应用具有很大的实际意义。本试验采用MCR处理天津大学青年湖湖水，试验规模为0.3~0.5m3/h。试验结果表明：采用合适的投药量，MCR对微污染水中的浊度、有机物和细菌具有良好的去除效果。试验期间出水的浊度和细菌总数分别低于0.3 NTU和30 CFU/mL；当原水是地表水环境质量标准（GB3838-2002）规定的Ⅴ类水时，出水水质基本可以满足生活饮用水卫生规范（2001）的要求；原水是劣Ⅴ类水时，出水水质接近饮用水标准。试验期间，膜比通量总体上呈缓慢下降趋势。在处理150 m3微污染水后对膜进行物理清洗，膜比通量能恢复到新膜的93.61%。试验表明该装置在野战给水和应急给水方面具有巨大的潜力.根据试验结果，本文提出了生产性规模膜混凝反应器处理系统的一般设计方法。反应器的设计应以HRT为主要设计参数。文中对某县城给水工程进行了模拟设计。本文运用技术经济分析方法对模拟工程项目进行了几个不同设计方案的比较和经济分析。分析结果表明MCR工艺与生物陶粒+常规处理工艺、常规处理+臭氧—活性炭联用法工艺相比，能耗偏高，处理成本也偏高。如果在不久的将来膜组件价格能降低20%，则MCR工艺各项经济学指标接近常规处理+臭氧—活性炭联用法工艺。更多还原

【Abstract】 With the conflict of water source pollution and stringent Sanitary Standards for Drinking Water, it is necessary to develop new technology and devices for drinking water treatment. Membrane separarion, an important technique to get safe drinking water, has been increasingly concerned in the field of water and wastewater treatment while the price of the material is reduced and the performance of the membrane is improved. Under such circumstances, microfiltration is widely used in drinking water production because of the steady quality of finished water and easy automation with low operating pressure. To put the membrane coagulation reactor (MCR) process into practical use, it is important to investigate the operation dependability, the design method of the full-scale MCR, and the economic feasibility.In this experiment, MCR used for the treatment of water from Lake Qingnian of Tianjing University were investigated. The capacity of experimental device was 0.3~0.5 m3/h. The result indicated that there were good removals of turbidity, bacteria and organic pollutants when proper dosage of ferric chloride and PAC were added. Turbidity and total amount of bacteria in finished water were respectively less than 0.3 NTU and 100 CFU/mL. When raw water belonged in class Ⅴ defined by Environmental Quality Standards for Surface Water (GB3838-2002), the finished water quality met the requiement of Sanitary Standards for Drinking Water (2001) and when the quality of the raw water was poorer than class Ⅴ, the finished water quality was very close to the Standard. During the experiment, membrane specific flux decreased gradually. After purifying 150 m3 water, the membrane was cleaned with physical methods and the specific flux recovered to 93.61% of the new membrane. Experimental results showed that this device is of great potential in field army and emergence water supply.According to the experimental results, the design method and general procedures for MCR process were developed. It was suggested that the hydraulic residence time (HRT) be the main design parameter. A project design of micro-polluted water treatment plant for a county was done in this thesis.Based on cost-benefit analysis, the MCR is a process with higher energy consumption and treatment cost compared with aerated biological filter - conventional water treatment process or conventional water treatment with O3 - powdered activated carbon (PAC) process. If the cost of membrane modules could be reduced 20%, the economic parameters of MCR would be similar to those of the conventional water treatment with O3-PAC process.更多还原