气升回流式一体化接触氧化反应器脱氮效果研究  

THE TOTAL NITROGEN REMOVAL EFFICIENCY OF AN INTEGRATED CONTACT OXIDATION REACTOR WITH AIR-LIFT RECYCLING

作　　者：刘惠敏[1,2] 郭雪松[2] 刘宏远[1] 周玲雪 梁瀚文[2] 

机构地区：[1]浙江工业大学,浙江杭州310000 [2]中国科学院生态环境研究中心,北京100085

出　　处：《水处理技术》2014年第9期96-100,共5页Technology of Water Treatment

基　　金：国家自然科学基金(51208495);国家科技重大专项"水污染控制与治理"(2011ZX07301-003-05)

摘　　要：针对农村分散型污水处理技术对高脱氮率、低能耗和运行简便的要求,研究开发了一种气升回流式一体化接触氧化反应器,利用曝气,使回流管内外产生液体密度差异,实现回流,简化操作。考察了不同回流区域、进水碳氮比、回流比条件下的TN去除效果。结果表明,在出水水质指标SS含量、COD和NH4＋-N达标的前提下,回流区域从缺氧二区变为缺氧一区,TN去除率从30%升至50%;随m（C）/m（N）从3：1升至5：1,TN去除率增加5%~10%;当回流体积比从0：1（没有回流）升至3：1,TN去除率从20%~30%升至65%~75%,但当回流体积比升至2：1（m（C）/m（N）=3：1）或2.5：1（m（C）/m（N）=5：1）以上时,TN去除率开始下降。因此,适宜的回流区域为缺氧一区、回流体积比为2：1。Based on the requirement of high nitrogen removal, low-consumption and easy-maintenance in rural decentralized wastewater treatment, a novel integrated contact-oxidation reactor with air-lift recycling was set up. By the different concentration between the inside and outside the tube formed by the aeration, the volume of nitrate was retumed to anoxic-zone. For the nitrogen removal research, the different recycling zones, m（C）/m（N） and volume of retuvaing nitrate were investigated. As a result, when the SS, COD and NH4＋-N contents were all satisfied with the standard, the TN rate is higher in the first anoxic-zone than that in the second anoxic-zone. With the increasing of m（C）/m（N） （from 3：1 to 5：1）, the removal rate of TN was increased by 5%-10%. Moreover, the nitrogen removal rate was improved from 20%-30% to 65%-75% with the recycling volume ratio from 0：1 to 3：1. However, the nitrogen removal rate would be decreased when the recycling volume ratio was over 2：1. Therefore, the appropriate recycling volume ratio was 2：1.

关 键 词：气升回流 一体式接触氧化 脱氮 碳氮比 回流比 

分 类 号：X703.1[环境科学与工程—环境工程]