摘要
为明确北京市生活垃圾填埋场渗滤液及恶臭污染特征,以渗滤液产生量大且设施稳定运行的某垃圾填埋场为研究对象,详细介绍了样品采集和分析方法,分析了渗滤液水质特征,同时对填埋场地下水水质进行等级评价。结果显示,渗滤液原液中化学需氧量(COD)、氨氮(NH3-N)含量分别达到21300 mg/L和1450 mg/L,生化需氧量(BOD5)占COD的比重为62.9%。渗滤液原液经过设定的净化工艺处理后,可达标排放。填埋场地下水水质单因子评价水质等级为Ⅲ级,综合评价分值F为2.18。利用电子鼻恶臭监测仪对填埋场环境空气进行恶臭浓度(OU值)在线分析,OU值变化范围为20~132,上午6∶00—10∶00和下午17∶00—20∶00时间段内,恶臭污染非常严重。利用冷阱富集-气质联用技术,对采集的环境空气样品进行恶臭物质成分分析,恶臭成分可达12种,其中乙醇的含量最高。
To fully investigate pollution characteristics of leachate and odor in landfills in Beijing,one landfill with large leachate production and stable operation was selected,methods of leachate sample collection and analysis were introduced in detail.The characteristic of leachate quality was analyzed.Meanwhile,the groundwater quality of the landfill was graded.In the leachate,the content of COD and NH3-N respectively reached to 21300 mg/L and 1450 mg/L.The proportion of BOD5 to COD is 62.9%.The leachate was discharged up to standard after being treated through the purified process.Through analyzing the groundwater quality index of landfill,the single factor assessment of groundwater quality in landfill was gradeⅢ,the comprehensive evaluation score F is 2.18.Ambient air samples were collected to analyze its components and odor pollution concentration.The odor pollution concentration had a trend of alternations between day and night in the landfill,with the range of OU value 20~132,especially the odor pollution was serious from 6∶00 to 10∶00 am and from 17∶00 to 20∶00 pm.Cold enrichment-GC/MS was used to analyze the components of ambient air samples,twelve components were detected,and ethanol had the highest percentage.
作者
芦会杰
刘欣艳
张馨月
LU Huijie;LIU Xinyan;ZHANG Xinyue(Beijing Municipal Institute of City Management,Beijing Key Laboratory of Municipal Solid Wastes Testing Analysis and Evaluation,Beijing 100028,China)
出处
《环境影响评价》
2022年第1期48-52,58,共6页
Environmental Impact Assessment
关键词
填埋场
渗滤液水质
恶臭污染
特性分析
landfill
leachate quality
odor pollution
characteristic analysis
