好氧修复下填埋场稳定化综合评价方法及其应用

    郑奇腾, 吴少杰, 冯世进, 陈宏信, 赵勇

    郑奇腾, 吴少杰, 冯世进, 陈宏信, 赵勇. 好氧修复下填埋场稳定化综合评价方法及其应用[J]. 岩土工程学报, 2024, 46(4): 890-897. DOI: 10.11779/CJGE20230025
    引用本文: 郑奇腾, 吴少杰, 冯世进, 陈宏信, 赵勇. 好氧修复下填埋场稳定化综合评价方法及其应用[J]. 岩土工程学报, 2024, 46(4): 890-897. DOI: 10.11779/CJGE20230025
    ZHENG Qiteng, WU Shaojie, FENG Shijin, CHEN Hongxin, ZHAO Yong. A comprehensive evaluation method for landfill stabilization under aeration and its application[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(4): 890-897. DOI: 10.11779/CJGE20230025
    Citation: ZHENG Qiteng, WU Shaojie, FENG Shijin, CHEN Hongxin, ZHAO Yong. A comprehensive evaluation method for landfill stabilization under aeration and its application[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(4): 890-897. DOI: 10.11779/CJGE20230025

    好氧修复下填埋场稳定化综合评价方法及其应用  English Version

    基金项目: 

    国家自然科学基金重点项目 41931289

    国家杰出青年基金项目 41725012

    国家自然科学基金青年科学基金项目 41572265

    详细信息
      作者简介:

      郑奇腾(1991—),男,博士,助理教授,主要从事填埋场、污染土壤等环境岩土工程的教学与科研工作。E-mail:08qitengzheng@tongji.edu.cn

    • 中图分类号: TU43

    A comprehensive evaluation method for landfill stabilization under aeration and its application

    • 摘要: 好氧修复技术具有加速填埋堆体稳定化的优势,正确评估其稳定化进程对好氧修复系统的设计和运营具有重要的意义,但是现有指标数量众多且差异化大。考虑稳定化指标的敏感性和工程监测的难易程度,从稳定化机理出发,分别从气相、液相、固相和沉降4个层面筛选氧气利用率、归一化有机溶质指标、脱氮效率、生物降解度和相对沉降速率为评价指标,并将其统一划分为具有不同稳定化特征的3个阶段(好氧转化、半稳定化和后稳定化),提出指标权重和阶段划分标准。然后,构建了不同阶段中不同指标的隶属度函数,结合模糊综合评价理论实现对填埋场稳定化进程的综合性评价,并将其应用于某好氧修复工程案例。
      Abstract: The in-situ aeration technology has advantages in accelerating landfill stabilization. A clear understanding of the evaluation of landfill stabilization under aeration is significant to the design and operation of an aeration system. However, the existing indices are numerous and varied. Considering the sensitivity to reflect the stabilization process and the accessibility to be monitored, five indices, oxygen utilization rate, normalized BOD/COD, nitrogen removal efficiency, biodegradation degree, and relative settlement rate, are selected to indicate the landfill stabilization from the perspective of gas, liquid and solid phases, respectively. Given the results of numerical simulations, the stabilization process of landfill under aeration can be divided into three phases: aerobic transformation, semi-stabilization and post-stabilization. After obtaining the corresponding weights of five indices, the membership functions of five indices in three stabilization phases are developed. Using the fuzzy theory, the evaluation method for landfill stabilization is established and applied to an in-situ landfill aeration case.
    • 图  1   模拟单元的网格划分与边界条件设定

      Figure  1.   Mesh and boundary setting of simulation

      图  2   好氧修复下氧气利用效率随时间变化与阶段划分

      Figure  2.   Variation of OUR with time under aeration and division of corresponding stages

      图  3   好氧修复下归一化有机溶质指标随时间变化与阶段划分

      Figure  3.   Variation of NBC with time under aeration and division of corresponding stages

      图  4   好氧修复下脱氮效率随时间变化与阶段划分

      Figure  4.   Variation of NRE with time under aeration and division of corresponding stages

      图  5   好氧修复下生物降解度随时间变化与阶段划分

      Figure  5.   Variation of BD with time under aeration and division of corresponding stages

      图  6   好氧修复下沉降速率随时间变化与阶段划分

      Figure  6.   Variation of settlement rate with time under aeration and division of corresponding stages

      表  1   不同填埋场好氧修复工程中的渗滤液有机质指标

      Table  1   Values of NBC in different in-situ aeration programs

      参考文献 曝气时期 NBC
      GB 16889—2008 [14] 排放标准 COD < 100 mg/L
      北京某老旧填埋场[15] 1 a 0.25 ~ 0.75
      2 a < 0.25
      武汉金口填埋场[8] 100 d 0.3 ~ 1
      350 d 0.04 ~ 0.3
      奥地利Vienna填埋场[11] 2 a < 0.08
      修复终点 < 0.01
      意大利Modena填埋场[12] 100 d 0.2
      180 d 0.09
      德国某填埋场[13] 修复终点 < 0.1
      巴基斯坦某填埋场[16] 1 a 0.01 ~ 0.05
      美国某填埋场[17] 修复终点 < 0.1
      下载: 导出CSV

      表  2   不同填埋场好氧修复工程中的沉降指标

      Table  2   Values of settlement and settlement rate in different in-situ aeration programs

      参考文献 曝气时期 沉降量 沉降速率
      GB/T 25179—2010[20] 高度利用 1~5 cm/a
      北京某老填埋场[15] 1 a 5.5% 11 %/a
      2 a 6% 6 %/a
      深圳下坪填埋场[18] 100 d 23% 28 %/a
      350 d 26% 1 %/a
      奥地利Vienna填埋场[11] 1 a 0.25 %/a
      意大利Modena填埋场[12] 360 d 3% ~ 5% 0.3 ~ 5 %/a
      德国某填埋场[13] 修复终点 0.2 %/a
      Stegmann等[19] 修复终点 90%
      下载: 导出CSV

      表  3   好氧修复稳定化进程阶段划分标准

      Table  3   Classification standards for landfill stabilization evaluation under aeration

      阶段划分 好氧转化阶段 半稳定化阶段 后稳定化阶段
      氧气利用率OUR/% ≥ 45 5 ~ 45 ≤ 5
      归一化有机溶质指标NBC ≥ 0.4 0.08 ~ 0.4 ≤ 0.08
      脱氮效率NRE/% ≤ 50 50 ~ 95 ≥ 95
      生物降解度BD/% ≤ 50 50 ~ 90 ≥ 90
      相对沉降速率/(%·a-1) su' ≥ 0 su' < 0且sB' ≥ 0.2 su' < 0且sB' < 0.2
      下载: 导出CSV

      表  4   北京某非正规填埋场原位好氧修复指标

      Table  4   Values of stabilization indicators of an in-situ landfill aeration program in Beijing

      指标 取值
      修复前 修复360 d
      气相 抽气井氧气浓度XO2 8% 16%
      OUR 62% 24%
      液相 COD浓度 1900
      mg O2/L
      1000
      mg O2/L
      BOD浓度 1100
      mg O2/L
      400
      mg O2/L
      B/C 0.58 0.4
      NBC 1 0.69
      氨氮浓度cNH4-N 870
      mg N/L
      300
      mg N/L
      NRE 0% 66%
      固相 可降解成分含量 20% 12%
      BD 0% 40%
      沉降 最小沉降速率 0.1 m/a
      (0.5 %/a)
      最大沉降速率 0.17 m/a
      (0.8 %/a)
      不均匀沉降速率 -0.3 %/a
      下载: 导出CSV

      表  5   各个评价指标对应不同阶段的隶属度

      Table  5   Degrees of membership function of stabilization indices corresponding to different stages

      指标 Ⅰ好氧转化阶段 Ⅱ半稳定化阶段 Ⅲ后稳定化阶段
      气相指标 0 1 0
      液相指标1 0 0.0004 0.9996
      液相指标2 0 1 0
      液相均值 0 0.5002 0.4998
      固相指标 0.94 0.06 0
      沉降指标 0 0.288 0.712
      下载: 导出CSV
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    出版历程
    • 收稿日期:  2023-01-07
    • 网络出版日期:  2023-06-24
    • 刊出日期:  2024-03-31

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