【作者】 刘少武；

【导师】 张智；

【作者基本信息】 重庆大学 ， 市政工程， 2004， 硕士

【摘要】 随着我国城市化的进程加快,大大加剧了城市水资源环境的负担,可利用的水资源正逐年减少,经济增长与水资源缺乏之间的供需矛盾加剧。而将城市二级出水作为一种再生资源二次利用是解决这一问题的有效途径,也是污水处理技术的一个重要发展方向。本文利用自己研制开发的复合变速生物滤池对深度处理城市污水厂二级出水作了生产性试验研究,并对试验结果及其净化机理进行了较深入的分析,获得了变速生物滤池的最佳运行工况,同时推导和验证了有机物降解的动力学模型。试验结果表明,当复合变速生物滤池装载新型酶促填料和组合填料时,在如下的运行环境下:常温,pH值介于6.5-8.0,且以200m3/d的工作流量下连续工作4d,并采用外层小断面进水内层大断面出水的运行方式时,可以对有机物获得较好的去除效果,以反冲洗强度q为8—15L /s?m2,时间为15min左右可以达到较好的反冲洗效果。在此条件下,变速生物滤池出水中各污染物指标分别为: CODcr≤20mg/L,NH3-N≤8.0 mg/L,TP≤1.0mg/L,BOD5≤10mg/L,浊度≤1NTU, CODcr去除率38%以上,NH3-N去除率20%以上,TP去除率20%以上,BOD5去除率42.9%以上,浊度去除率在80%左右, 出水低于《城市杂用水水质标准》(GB/T 18920—2002)。运用推导出的有机物去除率动力学模型基本上能反应变速生物滤池的实际运行工况,应用该模型,可以较好的预测滤池出水水质。更多还原

【Abstract】 In china, the Expansion of urbanization has badly burdened the urban water environment, whereas the development of water economic require more water. Water reclamation and reuse can lessen the burden of water environment and can be a stable stable secondary freshwater resource as well, so it is an important new tendency to develop technology of water reclamation and reuse in the field of wastewater treatment. The water reclamation and reuse technology of municipal wastewater using combined velocity-changeable bio-filter(CVBF) was studied through full-scale experiment under different hydraulic load conditions.In this artice, the performance parameters and model of organic removeal in the CVBF were defined and recommended through abundant examination data and analysis of purifying mechanism. Other aspects such as the startup of experiment device, observation and analysis of microorganism were studied as well.According to the experimental results, the CVBF filled with the new-type enzyme-promoted media can acquire good effect when the wastewater flow into CVBF through the smaller section and out through the bigger section. Under the condition with normal temperature, pH6.5~8.0, operation flow 200m3/d , the average removal percentage of CODcr is abvoe 38%, those of turbidity 、 BOD5、 NH3-N、P are above 80%、42.9%、20%、20%. The quality of effluence can meet the criterion of reused water quality(GB/T18920-2002),and the quantity of effluent is fit to the consuming demand of plant district.Furthermore, the dynamic models were deduced according to the experimental data.Based on these models, the quality of effluence could be forecasted exactly according to the operation conditions and parameters.更多还原