垃圾土介质中多组分气体压力与浓度定量表征关系初探——以现场注气试验为例  

Preliminary Study on the Quantitative Characterization Relationship between Multi-component Gas Pressure and Concentration in Waste Soil:Taking Field Gas Injection Test as an Example

作　　者：樊亚茹 王海军 刘磊[2,3] 姚远 FAN Ya-ru;WANG Hai-jun;LIU Lei;YAO Yuan(College of Building and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China;State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China;Hubei Province Key Laboratory of Contaminated Sludge & Soil Science and Engineering, Wuhan 430071, China;Wuhan Environment Investment & Development Co., Ltd, Wuhan 430019, China)

机构地区：[1]沈阳工业大学建筑与土木工程学院,沈阳110870 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071 [3]污染泥土科学与工程湖北省重点实验室,武汉430071 [4]武汉环境投资开发集团有限公司,武汉430019

出　　处：《科学技术与工程》2021年第27期11876-11881,共6页Science Technology and Engineering

基　　金：国家自然科学基金(41977254);湖北省自然科学基金(2019CFA012);武汉市科技成果转化专项(2018060403011348)。

摘　　要：多组分气体分布状态的预测和评估对于好氧通风工程的设计和运行具有重要现实意义。垃圾土中多组分气体压力和浓度的定量表征是弄清气体分布状态的基础。以两个典型垃圾填埋场(赤壁和北洋桥)为背景,开展了注气过程中多组分气体压力和浓度的现场监测试验,提出了修正后的气体分压与各组分浓度之间的定量表征关系,对比分析了ES(equation of state)模型和MES(modified equation of state)模型预测各组分气体压力与浓度的可靠性。结果表明:两组试验结果各组分气体压力与浓度都符合MES模型,各组分气体压力和浓度之间都存在线性关系;结合监测数据和模型分析发现:ES模型得到的分压值高于MES模型,表明监测得到的气体压力较理想值偏低;甲烷、二氧化碳、氧气和氮气压力差值分别为:1.75~1691 Pa、63.77~1014.05 Pa、50.19~707.98 Pa、907.81~7158.53 Pa。以上结果为好氧通风过程中多组分气体分布状态的评估提供了关键理论支撑。The prediction and evaluation of the distribution status of multi-component gases have important practical significance for the design and operation of aerobic ventilation projects.Quantitative characterization of multi-component gas pressure and concentration in the garbage is the basis for clarifying the gas distribution state.For this,multi-component gas pressure and concentration during gas injection were monitored on two typical landfill sites(Chibi and Beiyangqiao).Then the quantitative relationships between the corrected pressure and the concentration of each gas component based on equation of state(ES)model and modified equation of state(MES)model were respectively proposed,and the reliability of the two models was comparatively analyzed.The results show that the pressure and concentration of each component gas of the two sets of test results are both in line with the MES model,and there is a linear relationship between the pressure and concentration of each component gas.Combined with the monitoring data and model analysis,it is found that the partial pressure value obtained by the ES model is higher than the MES model,which shows that the monitored gas pressure is lower than the ideal value;the pressure differences of methane,carbon dioxide,oxygen and nitrogen are respectively 1.75~1691 Pa,63.77~1014.05 Pa,50.19~707.98 Pa,907.81~7158.53 Pa.The above results provide key theoretical support for the evaluation of the distribution of multi-component gases during aerobic ventilation.

关 键 词：垃圾 好氧 多组分气体 压力 浓度 

分 类 号：X705[环境科学与工程—环境工程]