摘要
将沸石联合经过驯化的活性污泥微生物固定化,通过静态实验,考察了不同粒径沸石及不同组分固定化方法对沸石联合微生物固定化去除氨氮的影响;通过动态实验,考察了沸石联合微生物固定化去除微污染水体中低浓度氨氮的机制。结果表明,活性污泥经过16d的驯化,氨氮去除率为90%以上;沸石吸附氨氮为快速吸附,粒径<0.5mm的沸石的吸附容量明显大于其他粒径的沸石;不同组分固定化小球对氨氮的去除效率不同,各组分均有贡献,吸附容量依次为:沸石固定化小球>沸石联合微生物固定化小球>微生物固定化小球;沸石联合微生物固定化去除微污染水体中低浓度氨氮可分为4个阶段,即沸石吸附阶段、吸附饱和及微生物适应阶段、硝化作用明显加强和沸石部分再生阶段、微生物作用良好和沸石进一步再生阶段,最终沸石吸附与生物再生处于良好的动态平衡中,氨氮去除率达到60%左右。
The removal of ammonia nitrogen from slightly polluted water by acclimated microbe and zeolite was studied, and the removal of ammonia nitrogen by microbe was more than 90% after 16 days＇ acclimation. Adsorption of ammonia nitrogen by zeolite was a fast process, diameter of zeolite had some effect on adsorption efficiency, and a smaller diameter resulted in a better adsorption efficiency. Series of combined granules were prepared by the immobi- lization of acclimated microbe, zeolite, and zeolite-microbe compound. Combined granules with different components present different adsorption behavior, adsorption rate followed the order of q^0zeolite〉q^0zeolite-microbe〉q^0mocrobe. The mechanism.of removing ammonia nitrogen from slightly polluted water by zeolite-microbe immobilized granules was discussed in dynamic experiment. The process has 4 phases： adsorption, microbe acclimating, nitrification performance and zeolite regeneration. After the process, zeolite adsorption-bioregeneration worked at dynamic balance, the removal rate of ammonia nitrogen was about 60%.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2009年第4期14-17,20,共5页
Environmental Pollution & Control
基金
国家科技支撑计划项目(No.2006BAJ08B09)
吉林省环境保护局资助项目(No.2008-10)
吉林大学研究生“985工程”创新基金资助项目
关键词
沸石
固定化
微生物
氨氮
微污染水
zeolite
immobilization
microbe
ammonia nitrogen
slightly-polluted water
