大型生活垃圾填埋场阶段性封场综合整治工程——以广东省某市生活垃圾填埋场为例  

Comprehensive Remediation Project of Phased Closure for Large-scale MSW Landfill:A Case Study of a MSW Landfill in Guangdong Province

作　　者：陈华 何耀忠 刘帅 刘畅 杨嘉杰 CHEN Hua;HE Yaozhong;LIU Shuai;LIU Chang;YANG Jiajie(School of Environment and Energy,South China University of Technology,Guangzhou Guangdong 510006;Guangdong Provincial Environmental Protection Research Institute Co.Ltd.,Guangzhou Guangdong 510062;Guangdong Environmental Protection Engineering Research&Design Institute Co.Ltd.,Guangzhou Guangdong 510062;School of Chemistry and Environment,Jiaying University,Meizhou Guangdong 514015)

机构地区：[1]华南理工大学环境与能源学院,广东广州510006 [2]广东省环保研究总院有限公司,广东广州510062 [3]广东省环境保护工程研究设计院有限公司,广东广州510062 [4]嘉应学院化学与环境学院,广东梅州514015

出　　处：《环境卫生工程》2024年第5期93-98,共6页Environmental Sanitation Engineering

基　　金：广东省住房和城乡建设厅2023年度软科学研究项目(2023-R25-091387)。

摘　　要：广东省某市生活垃圾填埋场已达到库容使用极限,存在环境污染及安全隐患,亟需进行整治。通过采取堆体整形、中间覆盖、渗滤液收集导排、雨水截洪和导排、地下水垂直阻隔及污染地下水抽排、地下水(地表水)污染监测等工程措施实施该项目阶段性封场综合整治。项目经整治后,定期检测地下水、生活垃圾堆体沉降速率能有效防治生活垃圾填埋场阶段性封场后的环境安全风险的发生,最大化减少二次污染。同时,生活垃圾填埋场渗滤液平均处理量从2019年的966 t/d降至2023年的380 t/d,渗滤液产生量逐步趋于稳定。堆体沉降速率从2021年4月的2.41 mm/d(折合87.97 cm/a)降至2023年9月的0.76 mm/d(折合27.74 cm/a),沉降速率经历快速下降后逐步趋缓。参考GB/T 25179—2010生活垃圾填埋场稳定化场地利用技术要求,该项目现阶段仍处于不均匀沉降期(10~30 cm/a),需持续动态监测。地下水主要污染指标CODMn和NH3-N浓度基本满足GB/T14848—2017地下水质量标准中Ⅳ类标准限值的要求。该项目整治措施的实施可为生活垃圾填埋场阶段性封场后场地的安全利用提供有力的数据支撑,并可为今后类似项目提供参考借鉴。A MSW landfill in Guangdong province had reached the limit of storage capacity,and had environmental pollution and safety risks,which need to be rectified.The comprehensive remediation of the project phased closure was implemented by taking engineering measures such as landfill shaping,mid-term covering,leachate collection and drainage,rainwater interception and drainage,groundwater vertical barrier,contaminated groundwater pumping and groundwater(surface water)pollution monitoring.After the remediation of the project,groundwater and the settlement rate of landfill pile were regularly detected,which could availably prevent environmental safety risks after the phased closure of the landfill and minimize secondary pollution.Meanwhile,the average leachate treatment capacity of the landfill decreased from 966 t/d in 2019 to 380 t/d in 2023,and the leachate production gradually stabilized.The settlement rate of landfill pile gradually decreased from 2.41 mm/d(87.97 cm/a)in April 2021 to 0.76 mm/d(27.74 cm/a)in September 2023,and the settlement rate gradually slowed down after a rapid decline.According to GB/T 25179—2010 Technical Requirements for Site Utilization after Stabilization in Municipal Solid Waste Landfill,the project is still in the uneven settlement period(10~30 cm/a)at this stage,and continuous dynamic monitoring is required.The main pollution indicators of groundwater including CODMn and NH3-N concentration basically met the requirements of the Class IV standard limit in the GB/T 14848—2017 Standard for Groundwater Quality.The implementation of engineering measures for this project could provide powerful data support for the safe utilization of the landfill site after the phased closure,while it also could provide reference for similar projects in the future.

关 键 词：生活垃圾填埋场 综合整治 阶段性封场工程 堆体稳定 

分 类 号：X705[环境科学与工程—环境工程]