厦门寨后垃圾填埋场释气影响及其控制

Impact and control of waste gases of Xiamen Zhaihou sanitary landfill of refuse

本文是在承担厦门市寨后“垃圾填埋场”工程环境影响评价的基础上，对该填埋场的垃圾释气规律作进一步研究。研究结果表明，①厦门煤气的普及率较高；②垃圾场营运 １１ａ左右，废气产生量及排气量达到最大值；③于小风条件下，在下风向 ５０ｍ处，ＣＨ_４浓度可达爆炸极限的 １６％～３１％（Ｖ／Ｖ），所产生的恶臭气体Ｈ_２Ｓ的影响距离比 ＮＨ_３大，在下风向 ５００ｍ处才能达到 ２级场界标准；④严格按卫生填埋的技术标准进行规范操作，确保排气管网的透气性，并设置自动报警监测设备等措施，有助于控制废气对环境的影响。

Owing to the research subject of the environment impact of Xiamen Zhaihou sanitary land fill of refuse in 1995, the paper analyses the process and change of waste gas generation, assess its impact for the environment. The following results are obtained. Firstly, the coal gas is widely used in Xiamen. Secondly, the waste gas amount of generation and release will be reaching to its top level after the sanitary landfill will have been run for 11 years. Thirdly, under breeze condition, the concentration of CH_4 will up to 16%~31% of the explosive terminal in the downwind 50m outside the landfill boundary and up to the second stench rank in the downwind 500m. Finally, according to the sanitary land fill technology, the normal operation should be performed in order to keep the ventilation of the gas emission nets; and the automatically monitor alarm should be set up. These measures will be helpful to control its impact for the environment.