脉冲扬水曝气生物接触氧化法净化微污染水  

Pulse Water-lifting Aeration Bio-contact Oxidation Process for Purification of Micro-polluted Water

作　　者：丛海兵[1] 章清琳[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225127

出　　处：《中国给水排水》2011年第19期28-31,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(2009ZX07317-007-1)

摘　　要：采用脉冲曝气生物接触氧化工艺进行处理城市河道水体的小试,得到了优化的技术参数:曝气强度为4 m^3/(m^2·h),水力停留时间为2 h,停曝比为(6:4)～(8:2),曝气周期≤2min。在优化的技术条件下,脉冲曝气生物接触氧化法对氨氮和COD_(Mn)的平均去除率分别可达(78.30%～93.51%)和(21.12%～24.29%),填料上的生物量为265.53～938.63 nmol/m^3,效果均好于传统连续曝气生物接触氧化法,且比其节省气量为60%～80%。将扬水曝气与生物接触氧化法组合,开发了脉冲扬水曝气原位水质净化装置,中试结果表明:在水温<15℃的条件下,对氨氮、总氮和COD_(Mn)的平均去除率分别达到55.31%、18%和10%。A pulse aeration bio-contact oxidation process was used to treat urban riverway water in lab-scale test. The optimal process parameters are as follows： the aeration intensity is 4 m3/（ m^2 · h） , the HRT is 2 h, the ratio of non-aeration to aeration is 6 ： 4 to 8 ： 2, and the aeration period is equal to or less than 2 min. The average removal rates of NH4^＋ - N and CODMn are 78.30% to 93.51% and 21.12% to 24.29% respectively. The biomass on bio-media is 265.53 to 938.63 nmol/m^3. The effect of pulse aeration bio-contact oxidation process is better than that of continuous aeration bio-contact oxidation process. The pulse aeration bio-contact oxidation process saves 60% to 80% air volume compared with continuous aeration bio-contact oxidation process. A pulse water-lifting aeration in-situ water quality purification device was developed by combining water-lifting aeration with biological contact oxidation. The pilot study results show that the average removal rates of NH4 -N, TN and CODM, are 55. 13% , 18% and 10% respectively when the water temperature is less than 15℃.

关 键 词：脉冲扬水曝气 生物接触氧化 微污染水 节能 

分 类 号：TU991.2[建筑科学—市政工程]