曝气生物滤池和地下渗滤系统对含磺胺类抗生素生活污水的处理研究

发布时间：2018-01-08 01:35

本文关键词：曝气生物滤池和地下渗滤系统对含磺胺类抗生素生活污水的处理研究　出处：《北京化工大学》2016年硕士论文　论文类型：学位论文

【摘要】：药品及个人护理用品(Pharmaceuticals and personal care products, PPCPs)作为近年来水环境中的新型污染物,其环境风险和安全隐患受到了世界范围内的关注。磺胺类抗生素作为PPCPs中的一种,在国内外水环境中普遍被检出。此外,由于我国城市污水收集系统设置的不完善,目前存在很多排污口不经过任何处理向河流中直排的现象,排入河流中的污水除了含有一些常规污染物外,通常含有一定量的磺胺类抗生素,这些污水进入受纳水体后严重的破坏了其生态环境。本文针对目前我国水环境中磺胺类抗生素污染现状,并结合“北京市大兴区新凤河南湖路桥至孙村闸河段水质改善研究与工程示范”(北京市科技计划)课题中排污口污水治理的需要,研究了适用于城市河流排污口截污的曝气生物滤池和地下渗滤系统组合工艺对生活污水中常规污染物及磺胺噻唑、磺胺甲恶唑、磺胺嘧啶等三种磺胺类抗生素的去除效果。研究曝气生物滤池和地下渗滤系统组合工艺对生活污水中COD、氨氮、TN、TP的去除效果。结果表明,曝气生物滤池在滤速为0.6 m/h,气水比为5：1,反冲洗周期为5天时,达到最佳运行状态,对COD、氨氮、TN、TP的去除率分别达到85.7%、82.6%、23.8%、53.8%。地下渗滤系统采用间歇的方式运行,每个周期连续进水12h,放空12h,进水为曝气生物滤池出水,水力负荷为5 cm·h-1,对COD、氨氮、TN、TP的去除率分别达到41.3%、62.8%、64.3%、67.1%。组合工艺对COD、氨氮、TN、TP总的去除率分别为91.6%、93.5%、72.8%、84.8%。研究模拟生活污水中磺胺类抗生素的去除效果。结果表明组合工艺对进水浓度分别为200μg/L的磺胺噻唑、磺胺甲恶唑、磺胺嘧啶3种磺胺类抗生素的去除率分别为53.01%、63.3%和68.8%,去除效率磺胺嘧啶磺胺甲恶唑磺胺噻唑。采用MiSeq高通量测序技术,分析了3种磺胺类抗生素的添加对曝气生物滤池中微生物多样性和群落结构的影响。使用Chaol、Shannon、 Coverage、OTU等指数对微生物多样性进行了分析,结果表明,添加抗生素初期,微生物多样性降低,随着时间的推移微生物多样性有所恢复但是仍然低于添加抗生素前的水平。通过使用分类学分析方法对微生物群落的结构进行了研究,结果表明,3种磺胺类抗生素对生物膜中微生物的门、纲、属都产生了一定的影响。
[Abstract]:Pharmaceuticals and personal care products (Pharmaceuticals and personal care products, PPCPs) as the model pollutant in water environment, the environmental risk and safety hazards by the worldwide attention. As a kind of sulfonamide antibiotics in PPCPs, in the domestic and foreign environment is generally positive. In addition, due to the sewage collection system our city is not perfect, there are many sewage without any treatment directly to the river discharge phenomenon in the sewage discharged into the river, in addition to containing some conventional pollutants, sulfa antibiotics usually contain a certain amount of the sewage into the receiving water after serious damage to the ecological environment. Aiming at the sulfa water in China Environmental antibiotics pollution situation, combined with the "Beijing City, Daxing District Xin Feng River in Luqiao city to the Sun Village Gate reach water quality improvement research and engineering demonstration "(Beijing science and technology plan) to sewage outfall sewage treatment project, research for city river outfall sewage biological aerated filter and underground infiltration system combination process of conventional pollutants and sulfathiazole sewage, sulfamethoxazole, removal of three sulfonamide antibiotics such as sulfadiazine. Study on biological aeration filter and underground infiltration system combination technology on wastewater COD, ammonia nitrogen, TN, the removal rate of TP. The results showed that the biological aerated filter in the filter speed is 0.6 m/h, gas water ratio is 5:1, the backwash cycle for 5 days, to achieve the best running status of COD, TN, TP, ammonia nitrogen removal the rate reached 85.7%, respectively, 82.6%, 23.8%, underground infiltration system 53.8%. using intermittent operation mode, each cycle of continuous influent 12h, vent 12h, inlet for biological aerated filter effluent, the hydraulic load was 5 cm - H-1, COD, TN, ammonia, TP to The removal rate reached 41.3%, respectively, 62.8%, 64.3%, 67.1%. combined process of COD, TN, TP, ammonia nitrogen, total removal rates were 91.6%, 93.5%, 72.8%, 84.8%. removal effect simulation of sulfonamide antibiotics in living wastewater. The results show that the combined process is respectively 200 g/ L of sulfathiazole influent concentration, sulfamethoxazole sulfamethoxazole, 3 sulfonamide sulfadiazine removal rates were 53.01%, 63.3% and 68.8%, the removal efficiency of sulfadiazine and sulfamethoxazole sulfathiazole. By high-throughput MiSeq sequencing technology, analyzes the influence of adding 3 kinds of sulfonamide antibiotics in biological aerated filter in microbial diversity and community structure. The use of Chaol, Shannon. Coverage, OTU and other index were analyzed on microbial diversity. The results showed that the addition of antibiotics early, microbial diversity decreased, with the passage of time the diversity of the microbial recovery but still below the tim The structure of the microbial community was studied by using the method of taxonomy. The results showed that the 3 sulfonamide antibiotics had certain effects on the microbes in the biofilm.

【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X799.3

【相似文献】