改良型氧化沟强化除磷效果的仿真研究  

Simulation Research of Enhanced Phosphorus Removal Effect in Improved Oxidation Ditch

作　　者：杨叶青[1] 沈昌明[1,2] 李岩芳[1] 杨殿海[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]上海市政工程设计研究总院,上海200092

出　　处：《中国给水排水》2011年第1期55-57,共3页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07316-002;2008ZX07317-002-01)

摘　　要：通过分析传统氧化沟工艺除磷能力差的原因,探索提高其除磷效果的工艺改良措施。在对比研究设置独立的厌氧区以及同时增加预缺氧区和厌氧区这2种方案的强化除磷效果后,提出了先预浓缩回流污泥、再将30%的高浓度污泥混合液输送至厌氧区的改良措施。该措施不仅能保证回流污泥量,同时还可避免回流污泥中过多的硝酸盐对厌氧释磷产生的不良影响。仿真研究结果表明,在相同的进水条件下,该改良措施的出水总磷浓度为0.773 mg/L,显著低于另2种强化除磷方案的结果(分别为1.52和1.73 mg/L)。因此,设置污泥预浓缩池、预缺氧区和厌氧区的方案能够显著提高氧化沟系统的除磷效果。In order to improve the removal rate of phosphorus in the traditional oxidation ditch, three enhanced phosphorus removal measures were studied. The first measure is to add an anaerobic zone before the oxidation ditch, the second one is to add an anaerobic zone and an anoxic zone, and the third one includes an anaerobic zone, an anoxic zone and a pre-thickening tank of returned sludge. The results show that the third measure of sending 30% of thickened sludge to anaerobic zone can not only ensure the returned biomass but also avoid a negative effect of the excess nitrate in the returned sludge on anaerobic phosphorus release. A simulation study reveals that under the same influent conditions, the third enhanced measure has the best phosphorus removal efficiency with a final phosphorus concentration of 0. 773 mg/L, while the other two with 1.52 mg/L and 1.73 mg/L respectively. Therefore, the third measure of including an anaerobie zone, an anoxic zone and a pre-thiekening tank of returned sludge can greatly improve the efficiency of phosphorus removal.

关 键 词：氧化沟 强化除磷 预浓缩 

分 类 号：X703[环境科学与工程—环境工程]