微孔曝气变速氧化沟运行及污泥硝化性能恢复  

Operation of Pilot-scale Fine-bubble Aeration Variable-velocity Oxidation Ditch and Recovery of Sludge Nitrification Performance

作　　者：许松[1] 韩芸[1] 董涛[1] 王显耀[1] 王斌帆 彭党聪[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2014年第21期1-5,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315-001-04;2009ZX07317-009);陕西省科技统筹创新重大项目(2011KTZB-03-03-03)

摘　　要：采用微孔曝气变速氧化沟中试系统处理城市污水,研究其对氮、磷和有机物的去除效果。结果表明,系统具有良好的脱氮除磷及降解有机物的能力,对COD、氨氮、TN和TP的平均去除率分别为92%、96%、81%和94%。系统中存在明显的反硝化除磷现象,活性污泥中的DPBs占PAOs的比例为61%。针对试验期间由于回流系统故障引发的污泥浓度低、硝化细菌数量大幅减少、出水氨氮浓度高的现象,采取降低进水量、加大曝气量、减少排泥量等措施恢复污泥的硝化能力,调试100 d后,污泥硝化性能完全恢复。A pilot-scale fine-bubble aeration variable-velocity oxidation ditch system was used to treat municipal sewage, and the removal efficiencies of nitrogen, phosphorus and organics by the system were investigated. The results showed that the system was effective in removal of nitrogen, phosphorus and organics, and the average removal rates of COD, ammonia nitrogen, TN and TP were 92%, 96%, 81% and 94%, respectively. Significant denitrifying phosphorus removal existed in the pilot-scale oxida- tion ditch system. The proportion of DPBs was estimated to be 61% of total PALOs. To address the prob- lems of low sludge concentration, significant reduction of nitrifying bacteria and high ammonia nitrogen in the effluent which were caused by failures of sludge return system, some measures such as reducing the influent rate, increasing aeration rate and reducing the sludge discharge were taken. Sludge nitrification performance of the pilot-scale system was completely recovered after 100-d commissioning.

关 键 词：微孔曝气变速氧化沟 脱氮除磷 反硝化除磷 硝化性能恢复 

分 类 号：X703[环境科学与工程—环境工程]