摘要
研究了沸石和陶粒挂膜前后脱除氨氮的特性,结果表明,沸石挂膜前后对氨氮的去除率均高于陶粒,沸石可以将水中77%～100%的氨氮脱除,而陶粒仅能去除56%～63%的氨氮,沸石是脱除氨氮的优选填料.解析实验结果表明,沸石挂膜前后脱除氨氮主要机理不同,离子交换是沸石挂膜前脱除氨氮的主要机理,化学吸附去除氨氮所占的比例高达80%;沸石挂膜后,降解氨氮的百分数高达到80%,附着的生物膜可以利用沸石中吸附的氨氮,使沸石的离子交换能力得到再生,沸石的再生率随着投加量的增加而增大,最高可达46%,延长了沸石的使用寿命.
The characteristics of ammonia nitrogen removal by zeolite and ceramicite was investigated.The results show that the removal efficiencies of ammonia nitrogen by zeolite is 77%~100% higher than those by ceramicite（the corresponding values by ceramicite are 56%~63%）.These results indicate that zeolite is optimum filling.In addition,the results show that there are different mechanisms of ammonium removal between zeolite and bio-zeolite.Chemical ion exchange is the main way of removing ammonium by zeolite as the removal percentage of chemical ion exchange is 80%.However,after zeolite was inoculated,the biological removal percentage increased to 80%.So,the biological removal nitrogen is the main way of removing ammonium by bio-zeolite.Inocaltation of zeolite benefits regeneration of zeolite and the maximal regeneration efficiency of zeolite can reach of 46%.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2012年第1期132-136,共5页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家国际科技合作资金资助项目(2010DFA94550
2010KW-24(1))
国家"水体污染控制与治理"重大科技专项资金资助(2009ZX07317-007-1-2)
国家自然科学基金资助项目(50778147)
关键词
沸石
陶粒
氨氮
生物再生
zeolite
ceramicite
ammonia nitrogen
biological regeneration.
