DO对亚硝酸型SND的影响  

EFFECT OF DO ON SIMULTANEOUS NITRIFICATION AND DENITRIFICATION VIA NITRITE

作　　者：张立秋[1] 张可方[1] 张朝升[1] 方茜[1] 李淑更[2] 凌忠勇[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]华南理工大学环境科学与工程学院,广东广州510006

出　　处：《水处理技术》2008年第8期29-33,共5页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(50578044);广东省自然科学基金资助项目(5001870)

摘　　要：采用序批式生物膜反应器(Sequencing batch biofilm reactor,SBBR)处理南方地区城市污水,应用亚硝酸型同步硝化反硝化(SND)技术进行强化生物脱氮。在进水TN30mg·L-1、COD150～250mg·L-1、pH值7.20～7.60及常温(24～29℃)等条件下,研究了DO与TN去除率和亚硝酸盐氮积累率的关系。试验结果表明,在40～100L·h-1曝气量下均会得到稳定的亚硝酸型SND,当曝气量增加到120L·h-1时,会向全程硝化转化。曝气量60L·h-1时为SBBR反应器的最佳曝气条件,脱氮效果更好,亚硝酸盐氮积累率可达89.7%,TN去除率最高可达87.8%。A laboratory scale experiment using sequencing batch biofilm reactor （SBBR） to treat municipal wastewater in South China and to enhance biological nitrogen removal by simultaneous nitrification denitrification （SND） via nitrite was described. The SBBR run at room temperature with wastewater with TN of about 30 mg·L^-1, COD of 150-250 mg·L^-1 and pH between 7.20 and 7.60. Under these conditions, nitrite accumulation efficiency and TN removal rate under different air fluxes were analyzed. The results showed that stable nitrite accumulation could be realized under air fluxes of 40-100 L·h^-1, but when air flux increased to 120 L·h^-1, nitrite accumulation rate decreased because nitrite translated to nitrate. The optimal air flux was 60 L·h^-1 with nitrite accumulation rate of 89.7% and TN removal rate of 87.8%.

关 键 词：SBBR 亚硝酸型SND 亚硝酸盐氮积累率 TN 曝气量 

分 类 号：X703.1[环境科学与工程—环境工程]