摘要
垃圾渗滤液中的氨氮是《生活垃圾填埋场污染控制标准》(GB 16889—2008)严格控制的,也是传统工艺难处理的一项指标。本文以北京市北神树垃圾填埋场渗滤液为研究对象,采用组合膜-沸石综合法对垃圾渗滤液中的氨氮进行了处理试验,研究了水样的pH值、沸石投加量、氨氮的初始浓度、接触时间等因素对氨氮去除率的影响。结果表明:水样依次通过微滤、超滤和反渗透的组合膜工艺后,利用沸石做进一步的深度处理,处理后的水质可达到GB 16889—2008的一级排放标准,沸石对氨氮的去除率达96.9%,氨氮的总去除率达99.7%。
As one of the main contaminants in landfill leachate, ammonia-nitrogen is controlled by China Standard for Pollution Control on the Landfill Site. It is difficult to remove ammonia-nitrogen by using traditional methods or techniques. The combined method of membrane and zeolite has been employed in the present study to deal with the ammonia-nitrogen produced from Beishenshu landfill in Beijing City. Experi- ments are conducted to investigate the impact of the pH value,the dosage of zeolite, the initial concentra- tion of NH3-N and the contact time on ammonia-nitrogen removal. Based on the analysis of leachate sam- ples, integrated membrane processes of mierofiltration （MF）, ultrafiltration （UF） and reverse osmosis （RO） at lab-scale are tested,respectively. Zeolite is used to further lower the ammonia-nitrogen concentra- tion in order to improve the water quality. The results show that the removal rate of ammonia-nitrogen can be up to 96.9% by using zeolite,while the total removal can be up to 99.7% by using eombined membranes and zeolite. The water quality after the combined treatment processes has been consistently up to the first grade standard of ＂GB 16889--2008＂.
出处
《安全与环境工程》
CAS
北大核心
2012年第5期31-34,共4页
Safety and Environmental Engineering
基金
河南省重大公益招标项目(101100910300)
关键词
垃圾渗滤液
组合膜-沸石综合法
氨氮去除率
landfill leachate
combined membrane-zeolite synthesis method
removal rate of ammonia-nitrogen
