【作者】 张红亮；

【导师】 黄廷林；

【作者基本信息】 西安建筑科技大学 ， 环境工程， 2004， 硕士

【摘要】 水污染不断在加剧，而随着人们生活水平的提高，饮用水的卫生和安全越来越被关注，因此有必要采用先进的饮用水深度处理技术来获得优质饮用水，本文通过改变饮用水常规处理工艺、臭氧化、活性炭与生物活性炭的不同组合的中试试验研究，选择出了最佳处理工艺，又对最佳处理工艺的各个参数进行试验分析，确定出经济合理的工艺参数，在现有的条件下，对预臭氧化进行了生产试验。得出如下结论： (1)最优化的深度处理饮用水的工艺应该是“常规处理+臭氧化+生物活性炭”，如果投加预臭氧，对微污染水源水中的氨氮没有效果，反而引起预氧化出水的浊度升高，但是对灭菌除藻，控制微生物的生长有一定的作用。 (2)臭氧分解后的产物是氧气，利用臭氧化不仅不会对水质造成二次污染，而且还可以提高水中的溶解氧，有利于生物处理。在臭氧化生物活性炭的深度处理工艺中，臭氧的最佳投加量为2.0mg／L～3.0mg／L，臭氧的接触时间在12min左右。 (3)生物活性炭滤池的碳床高度为2.0m，接触时间在12min左右。 (4)臭氧化可以使水中的AOC升高，促使生物不稳定，但是在臭氧投加量达到一定程度后，AOC又开始降低，投加臭氧后再加氯消毒不会使得AOC升高。 (5)臭氧化对三卤甲烷生成势的影响不大，但是生物活性炭有着较明显的效果，去除率可以达到10％，对卤乙酸的去除率可以达到30％。 (6)通过对预臭氧化的生产试验，水温较高的情况下，溶解氧容易达到饱和，甚至是过饱和状态，这样容易在滤池产生气阻现象，滤池的工作周期从三十六小时缩短到十几小时，影响水厂的正常运转。因此建议不单独投加预臭氧。更多还原

【Abstract】 Water pollution was becoming intensified, while with the improvement of human’s living standard, more attention was increasingly paid to the sanitation and safety of drinking water. So adopting advanced drinking water purification to obtain high quality water was necessary. By changing the different combination of drinking water’s regular treatment process, ozonation, activated carbon and biological activated carbon, the paper chose the optimal treatment process, also the parameters of the process were analyzed through experiments, then the economic, reasonable process parameters were determined. Under the permitted conditions, the all-scale plant was made to pre-ozonation. The results showed:(l)the optimal advanced purification drinking water process should be " regular treatment + ozonation + biological activated carbon". Though pre-ozonation had no effects on ammonia nitrogen in the water of micro-pollution water source, instead the turbidity of pre-oxidation finished water was raised, it had effects on killing bacteria and removing algae, and controlling the growth of micro-organism.(2)after ozone was decomposed the result was oxygen, ozonation not only couldn’t engender secondary pollution, but also could increase the dissolved oxygen in water and it was beneficial to biological treatment. In the advanced purification of ozonation biological activated carbon, the optimal dose of ozone was 2.0mg/l ~ 3.0mg/l, the retention time of ozone was about 12 minutes.(3)the height of biological activated carbon bed was 2.0m, and the retention time was about 12 minutes.(4)ozonation could increase the AOC in water, and cause organism unstable, but when the dose of ozone reached some degree, AOC began to decrease, and when putting into chlorine to disinfect wouldn’t make AOC increase.(S)ozonation didn’t have great influence on THMFP but the effects of biologicalactivated carbon were obvious, the removing rate could reach 10%, and 30% to removeHAAs.(6)by the all-scale plant of the pre-ozonation experiment, when the water temperature is high, the dissolved oxygen could easily attain saturation, even over-saturation, then the phenomenon of air block could be caused in the tank, the working period of tank may shorten from 36 hours to less than 15 hours, it would influence the normal operation of water treatment plant, so it was suggested not use pre-ozonation only.更多还原