【作者】 杨亚红；

【导师】 王瑛；

【作者基本信息】 兰州理工大学 ， 环境工程， 2006， 硕士

【摘要】 目前,随着工业经济的发展,世界范围内的饮用水源普遍受到了严重污染,常规工艺不但去除水中的溶解有机物和氨氮效率低,而且,强化氯化过程本身还导致了水中对身体健康危害更大的有机卤化物的形成。因此,寻求一种高效、实用、经济的水处理方法具有十分重要的现实意义。而水处理生物技术是一种经济有效且毒理学安全的水处理技术,其中曝气生物滤池生物处理工艺具有体积小,容积负荷高、水力负荷大、水力停留时间短、所需基建投资少、处理出水水质好等特点,应用潜力较大。 本文利用沸石-颗粒活性碳组合填料作为生物滤池的填料,对黄河兰州段微污染水源水预处理效果进行实验研究。通过25天的自然挂膜,当水质中NH4-N去除率在60%左右时,可认为挂膜成功,即进入实验运行阶段。运行阶段改变气水比停留时间和运行负荷等条件,对沸石-颗粒活性碳组合填料处理黄河兰州段微污染水源的效果进行了探讨。结果表明:在水力停留时间为40min,气水比为1∶1,水温为25～30℃的实验条件下,对氨氮（NH₄-N）、化学需氧量(COD_Mn)、紫外吸光度(UV₂₅₄)、浊度、锰的平均去除率分别为95.0%、32.68%、9.42%、70.1%、91.3%,预处理效果明显,且具有较强抗冲击负荷能力,并且该预处理工艺可以减轻后续常规处理工艺的负荷。 通过研究也显示采用沸石-颗粒活性碳组合填料曝气生物滤池工艺与常规净水工艺优化组合处理微污染水源经济高效、技术可行,在微污染水源水的净化处理中具有广阔的应用前景。更多还原

【Abstract】 With the development of technology society, sources water in the world have been widely polluted.The removal rate of resolvable organics and NH4-N in micro-polluted source water by conventional treatment method is rather low, and chlorination can form organic halide which will do harm to person.biological aerated filter（BAF） has many advantages, such as small volume, little covering earth and hydraulic retention time （HRT）,high treatment efficiency and effluent water quality, low investment and running cost etc and has been used in Micro-polluted source water recently.In this paper, BAF was studied on Huanghe River water micro-polluted source pretreatment with Zeolite and GAC as filtration media. Different factors that influence the growth of biofilm were studied.After 25 days,the removal rate of NH4-N arrived at about 60%.we can confine that the formation of the biofilm finished.The result shows that under the conditions of short hydraulic retention time （ HRT） 40min, air-water ratio 1:1, and water temperature 25-30 °C, the removal rate NH4-N, COD_Mn,UV₂₅₄,and turbidity is averaged at 95%, 32.68%, 9.42% and70.1%, respectively, with high resistance to shock loading.The research results also show the optimal combination of the Zeolite with the GAC is an economical, high-efficient and feasible process in pretreating water. The combination process has a widely application prospect removal of drinking source water in China and other countries.更多还原