改良型DAT-IAT工艺脱氮除磷运行工艺研究  

Nitrogen and Phosphorus Removal by Modified DAT-IAT Technology

作　　者：程璞[1] 孟凡生[2] 李顺灵 胡华锋[1] 

机构地区：[1]郑州牧业工程高等专科学校,河南郑州450011 [2]中国环境科学研究院,北京100012 [3]阿南金谷实业发展有限公司,河南郑州450002

出　　处：《环境科学与技术》2013年第2期128-132,146,共6页Environmental Science & Technology

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07207-001);河南省重点科技攻关项目(102102310247)

摘　　要：对DAT—IAT工艺加以改良，在DAT池前端分隔出缺氧区和厌氧区，强化了系统脱氮除磷能力。并在不同运行条件下，对改良型DAT-IAT工艺的脱氮除磷效果进行研究，得出优化条件。结果表明：DAT池溶解氧浓度在1,8—2．2mg／L之间；IAT池至DAT池的污泥回流比为300％；DAT池至缺氧区的混合液回流比为40％～50％；IAT池采用曝气1h、沉淀lh、排水lh的运行工况；系统泥龄在13。16d时，改良型工艺可以同时取得较好的脱氮和除磷效果，并且改良型工艺的脱氮除磷能力明显优于常规DAT-IAT工艺。DAT-IAT Technology was modified to divide an anoxic zone and an anaerobic zone separately before DAT pond, to improve the removal ability of nitrogen and phosphorus. Removal effect of the improved system on nitrogen and phosphorus was studied under various working conditions. Results indicated that it can simultaneously and efficiently remove nitrogen and phosphorus under the conditions as DO concentration of DAT pond 1.8-2.2 mg/L, sludge reflux ratio from IAT to DAT 300%, mixture reflux ratio from DAT to anoxic zone 40%~50% at the working conditions of IAT 1 h aeration, 1 h deposition and lh outflow, with sludge retention time of the system 13-16 days. Under the same conditions of operation, the results illuminated that the removal ability of improved technique on nitrogen and phosphorus was much better than that of the traditional technology.

关 键 词：改良型DAT—IAT工艺 脱氮除磷 缺氧 厌氧 好氧 

分 类 号：X703.1[环境科学与工程—环境工程]