【作者】 张速新；

【导师】 周玉文；

【作者基本信息】 北京工业大学 ， 市政工程， 2003， 硕士

【摘要】 本文对曝气生物滤池深度处理城市污水厂二级出水用于回用目的的性能进行了研究，主要内容包括：(1)曝气生物滤池填料的优选。通过对陶粒、石英砂、沸石及焦碳四种填料的性能进行对比，结果表明，陶粒在挂膜稳定性和去除污染物能力方面优于其它三种填料。(2)曝气生物滤池挂膜方式的优选。通过对直接以正常工作滤速启动、直接通入要处理的水逐步提高滤速启动以及污泥接种三种方式进行对比，结果表明，直接以正常工作滤速启动具有挂膜速度快、培养出的生物膜性能好的优点，是一种适合曝气生物滤池深度处理的启动方式。(3) 曝气生物滤池处理性能的分析。主要对曝气生物滤池处理COD、浊度、NH3-N、SS的性能及其影响因素进行了研究，结果表明：① 采用粒径大小为2～4mm的陶粒为曝气生物滤池的滤料，在填料高度2m，进水水力负荷1.6m3/(m2﹒h)时，上向流曝气生物滤池处理后的出水可以达到景观环境用水水质标准；在填料高度2.3m，水力负荷6.4m3/(m2﹒h)时，下向流曝气生物滤池处理后出水可以达到生活杂用水水质标准；(4)曝气生物滤池的反冲洗。对曝气生物滤池的反冲洗方式、反冲洗强度及反冲洗周期进行了研究。结果表明，采用先气洗，再气-水联合反冲洗，最后水漂洗的方式反冲洗效果好，反冲洗周期与进水水质、滤池的流向、水力负荷等因素有关。反冲洗参数为：单独气冲的强度为10～12L/(m2﹒s)，历时3min；气-水联合冲洗时，气冲的强度为10～12L/(m2﹒s)，水冲强度为7 L/(m2﹒s)左右，历时为6min；用水漂洗时的强度为9 L/(m2﹒s)左右，历时5min。更多还原

【Abstract】 In this thesis, Application of biological aerated filter (BAF) in secondary effluent advanced treatment for reuse and reclamation is studied. It mainly includes aspects as follows: (1) Media select. Comparing the performance of biofilm growth and pollutants removal of ceramics, quartzite, zeolite and coke, results show that ceramics is better than others. (2) Start-up manner select. Comparing the performance of directly passing the process water with working flow rate, directly passing the process water with gradually increasing flow rate, and using activated sludge as seed, results show that start-up manner of directly passing the process water with working flow rate is better than others, and very suitable for wastewater advanced treatment, which has shorter start-up time, better biofilm growth state. (3) Treatment capacity analysis. The performance of BAF in COD, turbidity, NH3-N, SS removal and its influence factors are all studied, results show these: ceramics size is 2～4mm, when media height is 2m ,under the hydraulic loading of 1.8m3/(m2﹒h),the treatment effluent for upflow BAF can meet Scenic Water Quality Standard; When media height is 2.3m, under the hydraulic loading of 6.4m3/(m2﹒h),the treatment effluent for downflow BAF can meet Miscellaneous Domestic Water Quality Standard. (4) Backwash. The method, intensity, and period of backwash are all discussed, results show that the method of firstly air scouring, then air-water backwash, finally water-wash has many advantages over other methods. Backwash period is relative to water quality, inlet manner and hydraulic loading, etc. Backwash parameters are summarized as these: single air scouring intensity is 10～12L/(m2﹒s), last time is 3min; then<WP=5>air intensity, water intensity and last time for air-water backwash is 10～12L/(m2﹒s), 7 L/(m2﹒s) and 6min respectively; finally water-wash intensity is 9 L/(m2﹒s), last time is 5min.更多还原