水解反硝化工艺强化脱氮处理  

Strengthening denitrification by hydrolysis-denitrification technology

作　　者：宋英豪[1] 王敏[2] 熊娅[2] 杜理智[3] 林秀军[2] 梁康强[2] 

机构地区：[1]北京化工大学工程技术研究院,北京100029 [2]北京市环境保护科学研究院,北京100037 [3]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《化工学报》2013年第6期2194-2200,共7页CIESC Journal

基　　金：国家高技术研究发展计划项目(2009AA063802);国家水体污染控制与治理科技重大专项(2009ZX07317-008-01)~~

摘　　要：碳源对脱氮除磷都具有重要的作用,碳源不足会导致脱氮效果降低,出水TN水质不达标。为解决碳源不足造成的脱氮能力差的问题,本试验采用水解反硝化脱氮工艺,将水解酸化与反硝化脱氮过程相结合,取代缺氧反硝化,有效地解决了碳源不足所导致的脱氮效果差的问题。利用水解反硝化脱氮工艺处理城市污水,出水NH4+-N、TN和COD都满足一级A标准,去除率分别为98.0%、69.4%和82.7%,比同期污水处理厂AAO工艺的TN去除率高出17.5%。在BOD5/TN为3～5的条件下,水解池中污泥的比反硝化速率为缺氧池污泥的1.2～1.7倍,并且去除相同的N所需要的碳源较少,在碳氮比为3∶1、3.5∶1、4∶1和5∶1时去除单位N水解池可分别节省59.5%、52.2%、19.9%和23.1%的COD,有效地解决了脱氮过程中碳源不足问题。Carbon source plays an important role in nitrogen and phosphorus removal for municipal sewage treatment, and the deficiency of carbon source can lead to decreasing nitrogen removal and unqualified TN of effluent. To solve the problem of poor nitrogen removal capacity caused by insufficient carbon source, the experiment adopted the hydrolysis-denitrification technology, in which a combination of hydrolytic acidification and denitrification replaced anoxic-denitrification, and effectively solved the problems. As the use of the hydrolysis-denitrification technology to treat municipal sewage, NH4＋-N, TN and COD of effluent all met the standard A, with removal rates of 98.0%, 69.4% and 82.7% respectively. TN removal rate was 17.5% higher than the sewage treatment plant by AAO process in the same period. With BOD5/TN 3 to 5, sludge denitrification rate in the hydrolysis tank was 1.2 to 1.7 times than that in the anoxic tank, less carbon source was needed to remove the same N. When BOD5/TN was 3 ： 1, 3.5 ： 1, 4 ： 1 and 5 ： 1, for the removal of unit N utilization of COD by denitrification bacteria in the hydrolysis tank could be saved by 59.5%, 52.2%, 19.9% and 23.1% respectively, which effectively solve the problem of the lack of carbon source in the denitrification process.

关 键 词：水解 反硝化 碳源 碳氮比 

分 类 号：X703.1[环境科学与工程—环境工程]