污泥龄及pH值对同步硝化反硝化过程的影响  

Effect of sludge age and pH value on simultaneous nitrification and denitrification(SND)

作　　者：方茜[1] 张朝升[1] 张可方[1] 杜馨[1] 林金銮[1] 

机构地区：[1]广州大学土木工程学院,广东广州510006

出　　处：《广州大学学报（自然科学版）》2008年第3期50-54,共5页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金(50578044);广东省自然科学基金博士启动基金资助项目(7301484)

摘　　要：为考察污泥龄和pH值对同步硝化反硝化(SND)过程的影响,试验采用SBR法处理模拟低碳城市污水,研究在不同污泥龄和pH值下,SND过程的脱氮效果.结果表明:污泥龄大于10 d时,随其增加,硝化效率增加而趋于稳定,反硝化效率和污泥浓度亦随之增加;pH值在中性和略偏碱性的范围内则有利于SBR反应器内SND的发生.由此说明污泥龄对SND的影响主要表现在对硝化过程和污泥浓度方面的影响,而SND的运行方式又有利于降低系统内碱度的投加量.In order to investigate the effect of sludge age and pH value on simultaneous nitrification and denitri- fication （SND） , the removing effect of nitrogen of SND was studied in SBR treating low carbon synthetic wastewater under different sludge ages and pH values. The results indicated that the nitrifying efficiency increases and tends to be stable, the denitrifying efficiency and sludge concentration also increase with the increasing of sludge age when the sludge age was bigger than 10 d. The neutral and slightly alkalescency pH range is better to SND in SBR. It can be concluded that the effect of sludge age on SND is embodied in its effect on the nitrification and sludge concentration. The operating of SND is better to reduce the adding doses of alkality.

关 键 词：同步硝化反硝化 污泥龄 PH值 

分 类 号：X703[环境科学与工程—环境工程]