游离亚硝酸对垃圾渗滤液NO2-还原过程的抑制影响  

EFFECT OF FREE NITROUS ACID INHIBITION ON NITRITE REDUCTION OF LANDFILL LEACHATE

作　　者：王燕[1] 王淑莹[1] 王凯[1] 孙洪伟[1] 彭永臻[1] 郝坤[1] 

机构地区：[1]北京工业大学,北京市水质科学与水环境恢复工程重点实验室,北京100124

出　　处：《水处理技术》2011年第5期17-21,共5页Technology of Water Treatment

基　　金：国家自然科学基金(50978003);北京市自然科学基金重点项目(8091001)

摘　　要：采用UASB-SBR组合工艺处理实际垃圾渗滤液,在获得稳定短程生物脱氮的前提下,以SBR系统内短程污泥为研究对象,通过设定不同的NO2-质量浓度和pH梯度考察NO2-质量浓度和pH与NO2-还原速率的相关性,并在此基础上进一步研究游离亚硝酸(FNA)质量浓度对反硝化菌的抑制影响。试验结果表明,当NO2-质量浓度和温度一定时,相同pH条件下,不控制pH时NO2-还原速率较恒定pH时NO2-还原速率高;且恒定pH在6.5～8.0范围内,NO2-还原速率随着pH的升高逐渐升高。当pH和温度一定时,NO2-还原速率随着NO2-质量浓度的增加呈现先升高后降低或不变的趋势。由此可知,pH和NO2-质量浓度对NO2-还原速率有较为重要的影响。FNA是NO2-质量浓度、pH和温度三者的函数,试验发现FNA质量浓度在0.005～0.01 mg.L-1范围时对NO2-还原过程有明显的抑制作用。On the basis of shortcut biological nitrogen removal from landfill leachate by using UASB-SBR system, the relationship between nitrite concentration, pH and nitrite reduction rate was studied with different concentrations of NO2- and pH to investigate the inhibitory effect of free nitrous acid （FNA） on denitrification. The result showed that nitrite reduction rate of not controlling pH was higher than that of controlling under the constant concentration of nitrite and temperture. On the other hand, nitrite reduction rate was increased then decreased gradually or remained unchange with the increasing concentration of nitrite under the constant pH and temperture. Therefore, pH and nitrite concentration had great effects on nitrite reduction rate of shortcut biological nitrogen. FNA was the function of nitrite concentration, pH and temperture. And when the concentration of FNA was in the range of 0.005-0.01 mg .L-l, it had great inhibitory effect on nitrite reduction.

关 键 词：垃圾渗滤液 游离亚硝酸 PH NO2- 抑制 

分 类 号：X703.1[环境科学与工程—环境工程]