间歇曝气耦合内循环曝气生物滤池脱氮除磷性能研究  

Research on nitrogen and phosphorus removal performance of intermittent aeration coupled with internal circulation biological aerated filter

作　　者：柴蓓蓓[1,2] 曹锋锋 任武昂 CHAI Beibei;CAO Fengfeng;REN Wuang(School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054;College of Energy and Environmental Engineering,Hebei University of Engineering,Handan Hebei 056038)

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054 [2]河北工程大学能源与环境工程学院,河北邯郸056038

出　　处：《环境污染与防治》2020年第12期1443-1448,共6页Environmental Pollution & Control

基　　金：陕西省重点研发计划项目(No.2019ZDLNY01-08、No.2020ZDLNY06-07);国家自然科学基金面上项目(No.NSFC52070065)。

摘　　要：采用间歇曝气耦合内循环曝气生物滤池(BAF)处理实际生活污水,考察回流比和曝停比对BAF脱氮除磷性能的影响。结果表明:(1)当进水碳氮质量比平均为2.9时,连续曝气且回流比为100%的工况下,TN去除效果最佳,平均去除率为72.79%,但TP的平均去除率仅为54.45%。(2)将系统调整为间歇曝气,在最佳回流比100%耦合曝停比2∶1(即曝气40 min、停曝20 min)的工况下,COD、氨氮、TN、TP的平均去除率分别为85.56%、86.35%、75.23%、76.08%;反应柱沿程DO呈山谷型分布,停曝阶段35~75 cm区域存在厌氧、缺氧环境,可有效实现升流式BAF的同步脱氮除磷。The effects of reflux ratio and aeration/interruption ratio on the performance of biological aerated filter(BAF)for nitrogen and phosphorus removal were investigated using intermittent aeration coupled with internal circulation BAF for the treatment of actual domestic wastewater.The results showed that:(1)when the average carbon to nitrogen ratio of the influent was 2.9,the best TN removal was achieved with an average removal rate of 72.79%under continuous aeration and an optimum reflux ratio of 100%,but the average TP removal rate was only 54.45%.(2)Adjusting the system to intermittent aeration,under the condition of the best reflux ratio of 100%and aeration/interruption ratio of 2∶1(40 min aeration and 20 min interruption),the average removal rates of COD,ammonia nitrogen,TN and TP were 85.56%,86.35%,75.23%and 76.08%respectively.DO along the reaction column was distributed in a valley type,and there was an anaerobic/anoxic environment in the area of 35-75 cm during the interruption phase.It could effectively realize simultaneous nitrogen and phosphorus removal of upflow BAF.

关 键 词：曝气生物滤池 间歇曝气 内循环 生活污水 脱氮除磷 

分 类 号：X799.3[环境科学与工程—环境工程]