垃圾填埋场渗滤液地下原位脱氮技术综述

氨氮是城市垃圾厌氧填埋过程中产生的常见的污染物。由于氨氮的持久性和生物毒性,生活垃圾填埋场渗滤液中氮的脱除已引起了人们的高度关注。文中结合国内外的研究现状的基础,论述了厌氧渗滤液回灌、强制通风好氧填埋、准好氧填埋和生物反应器填埋四种垃圾渗滤液原位脱氮处理技术的原理、技术特点、工程投资、运行成本以及处理效果等;指出了垃圾填埋场渗滤液原位脱氮技术的未来研究重点:填埋场内脱氮机理和脱氮速率的深入研究、工艺控制优化研究以及生物反应器填埋的实际应用设计研究。

In-situ denitrification of landfill leachate: A review

Ammonia is the most common contaminant in municipal solid waste landfill leachate. More and more attention is focused on the studies of denitrification of landfill leachate and in-situ treatment aiming at ammonia removal due to its persistency and bio-toxicity in the environment. This paper reviewed the principles of four kinds of in-situ ammonia removal technique including anaerobic leachate circulation, forced aeration, semi-aerobic landfill and bioreactor landfill. and compared their mechanisms, technological characteristics, engineering investment, operation cost and treatment efficiency. The authors pointed out the future research directions in this field like mechanism and kinetic rate of denitrification processes in in situ leachate treatment, optimal control of the process as well as design and operation of in situ bioreactor in landfills.