上向流曝气生物滤池反冲洗实验研究  

Backwashing of upflow biological aerated filter

作　　者：邱立平[1] 王广伟[1] 张守彬[1,2] 陈京英[1] 刘永正[1] 

机构地区：[1]济南大学土木建筑学院,济南250022 [2]哈尔滨工业大学市政与环境工程学院,哈尔滨150090

出　　处：《环境工程学报》2011年第7期1522-1526,共5页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2009ZX07424-006);国家自然科学基金资助项目(50978121)

摘　　要：为进一步探讨水头损失、反冲洗条件及反冲洗效果之间的关系,在前期理论分析的基础上,对天然斜发沸石、页岩陶粒和石灰岩碎石填料等3座曝气生物滤池的水洗、气洗和水漂洗等基本反冲洗过程进行了优化研究,考察了反冲洗后滤池水头损失的恢复情况以及反冲洗对处理效能的影响。结果表明,反冲洗后初滤出水的COD和SS稍有增加,但很快就在2 h内恢复正常,出水氨氮浓度的变化幅度最小,而且恢复速度更快。3种填料曝气生物滤池不仅表现出良好的处理效能和稳定的运行效果,对反冲洗过程的反馈也没有显著差异。建议上向流曝气生物滤池的反冲洗推荐程序为:先以气冲洗强度10 L/(m2.s)单独气洗2～3 min,再气水冲洗强度10 L/(m2.s)和水冲洗强度10 L/(m2.s)联合反冲洗3～5min,最后以水冲洗强度10 L/(m2.s)漂洗9～11 min。In order to get deeper understanding of the relationship between headloss development and backwashing in biological aerated filters（BAFs）,backwashing procedure which employed air washing,water washing and water rinse process was optimized in three BAFs with zeolite,ceramic particle and carbonate media respectively,and the recovery of headloss and treatment efficiency in biofilter after backwashing were also investigated based on the theoretical analysis.The results showed that the initial COD and SS concentration in effluent increased after backwashing but recovered in 2 hours.The ammonia nitrogen concentration in effluent almost did not change and recover quickly.All three BAFs have a promising treatment performance and operational stability after backwashing.The backwashing procedure of upflow BAF is suggested as follows：firstly,air washing 2~3 min with flow rate of 10 L/（m2·s）,then air and water washing 3~5 min with both air and water flow rate of 10 L/（m2·s）,finally,water rinse for 9~11 min with water flow rate of 10 L/（m2·s）.

关 键 词：曝气生物滤池 水头损失 反冲洗条件优化 反冲洗效果 

分 类 号：X703.1[环境科学与工程—环境工程]