两级曝气生物滤池处理生活污水的工艺参数  

Desing Parametesr of Two-Stage Biongical Aeratel Filted Treating Sewage

作　　者：杨青[1] 赵玉华[1] 张林生[2] 傅金祥[1] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]东南大学环境工程系,江苏南京210096

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第1期130-133,176,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省自然基金项目(20022007)

摘　　要：目的研究两级上流式曝气生物滤池（BAF）工艺脱碳硝化原理，确定该工艺运行参数.方法通过实验对比气水比、水力负荷、容积负荷等参数的变化对处理效果的影响.结果接种挂膜需要12-19 d，常速启动、加载启动均需1-2 d.过滤周期由水力负荷2.6 m^3/（m^2·h）时的65 h缩短到水力负荷5.2 m^3/（m^2·h）时的46h；当水力负荷进一步提高到7.8 m^3/（m^2·h）时，出水明显恶化.结论气水比过小，溶解氧不足将抑制好氧微生物活性，影响污染物的氧化分解；气水比过大，富余气泡将减少过水断面面积，缩短水力停留时间，影响处理效果.一级滤池、二级滤池气水比宜分别采用2：1和1.3：1，当水力负荷〈5.2m^3/（m^2·h），出水水质满足杂用水需要.出水底物质量浓度随容积负荷的升高而上升，受水力负荷的影响较小COD容积负荷〈2.0 kg/（m^3·d）和NH3-N容积负荷〈0.6 kg/（m^3·d）时，经两级BAF处理出水在运行周期内能满足排放标准.The study focused on decarbonization and nitrification theory and parameters of two- stage biological berated filter techniques. The impact of COD and NH3 - H removal performance were established considering forming bio - film ＆ setting - up methods, ratio of gas - to - liquid, hydraulic loading and sub- strate loading. Technique cost 12-19d to accomplished the forming bio- film and 1- 2d for the setting- up.Filtering period shrank from 65h at hydraulic loading 2.6m^3/（m^2·h） to 46h at hydraulic loading 5.2m^3/（m^2·h）, and the efflux degraded at hydraulic loading 7.8m^3/（m^2·h）. Owing to the little ratio, the deficiency of DO restricted microbe activity and impacted the contamination oxygenolysis; owing to the much ratio, overabundance bubbles limited the inside section area, curtailed HRT and influenced treatment effect. Efflux suffice The Reused Demand when hydraulic loading under 5.2m^3/（m^2·h） with the ratio in two filter 2 ： 1 and 1.3 ： 1 respectively. Efflux concentration increased following substrate loading＇ s rising, less influence with hydraulic loading. Efflux though the two - stage BAF treatment met the integrated wastewater discharge standard well within the filtering period when hydraulic loading under 2kgCOD/（m^3·d） and 0.6kgNH3 - N/（m^3·d）..

关 键 词：两级曝气生物滤 脱碳硝化原理 气水比 水力负荷 容积负荷 

分 类 号：X703[环境科学与工程—环境工程]