氧化沟/MBR组合工艺处理城市污水的中试研究  

Study on Oxidation Ditch/MBR Process for Treating Municipal Sewage

作　　者：俞开昌[1] 薛涛[1] 贾海涛[1] 岳三琳[1] 张悦[1] 

机构地区：[1]北京碧水源科技股份有限公司,北京102206

出　　处：《中国给水排水》2014年第11期116-119,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2011ZX07317-002)

摘　　要：以强化脱氮效果为目标，开展了氧化沟／膜生物反应器（MBR）组合工艺处理实际城市污水的中试研究。该组合工艺在12～15℃的低水温条件下，对总氮的去除率可达到94％以上，出水总氮浓度低于5mg／L。氧化沟和膜池均发挥了同步硝化反硝化脱氮的作用，其中氧化沟是主要的脱氮贡献单元。氧化沟与MBR形成了良好的组合，而800％以上的高回流比可加快水力循环与混合传质，使得组合工艺的整体优势更为突出。高回流比可提高脱氮效果，但将增加回流能耗，相关研究与评估需在实际工程中进一步开展。To enhance nitrogen removal from municipal sewage, a combination of oxidation ditch and membrane bio-reactor （MBR） was used for the pilot research. Under the condition of 12 to 15℃ , the TN removal rate of the proposed process exceeded 94% while the TN concentration in the effluent was lower than 5 mg/L. Both oxidation ditch and MBR contributed to the simultaneous nitrification and denitrification. The oxidation ditch had the most significant contribution to nitrogen removal and it cooperated well with the MBR. The recirculation ratio higher than 800% could accelerate the hydraulic circle and promote the mixing and contact between pollutants and microorganisms. More studies are needed to balance the advantage of high recirculation ratio and corresponding high energy consumption.

关 键 词：城市污水 脱氮 氧化沟 膜生物反应器 回流比 

分 类 号：X703.1[环境科学与工程—环境工程]