基于模拟-优化模型的某场地污染地下水抽水方案设计

发布时间：2018-01-01 02:17

本文关键词：基于模拟-优化模型的某场地污染地下水抽水方案设计　出处：《环境科学研究》2016年11期 　论文类型：期刊论文

【摘要】：针对抽出-处理技术修复污染地下水时抽水方案不合理导致修复成本高、修复效果差的问题,以我国北方某化工企业搬迁场地局部区域苯污染地下水为对象,通过GMS软件联合MGO(modular groundwater optimizer)程序对抽水方案进行模拟优化.结果表明:研究区地下水中检出ρ(苯)最大值为700μg/L,修复目标为100μg/L;自然降解条件下需1 740 d才能达到修复目标,降解缓慢.经过技术比选,选择抽出-处理技术快速修复该污染地下水.通过模拟-优化模型对抽出-处理技术中的抽水方案进行优化设计,结果显示,当抽水时间小于600 d时,出现水头疏干,无法进行抽出处理修复;当抽水时间在600~700 d范围内时,设计的抽水时间越长,达到修复目标所需的总抽水量越小,修复成本越低;当设计抽水时间超过700 d时,修复成本增加,1 500 d的抽水方案较700 d总抽水量增加了2.38×106m3.综合修复时间及修复成本分析,虽然抽水时间为700 d时抽水量最小,但相对于抽水时间为600 d的优化方案,其抽水量仅减少1.4%,经济性较差,因此推荐抽水时间采用600 d.
[Abstract]:For out processing technology to remediate contaminated groundwater when pumping scheme unreasonable high repairing cost, repair the problem of poor results, in northern China a chemical enterprise relocation site local benzene contaminated groundwater as the research object, through the GMS software combined with MGO (modular groundwater optimizer) program simulation and optimization of pumping scheme. The results show that the detection of p the groundwater (benzene) maximum value is 700 g/L and the repair target of 100 mu g/L; under the condition of natural degradation of 1740 D in order to achieve the goal of slow degradation. After repair, technology selection, selection of drawing processing technology rapid restoration of the polluted groundwater. Through the simulation optimization model to optimize the design of pumping. Plan out processing technology. The results showed that, when the pumping time is less than 600 D, the appearance of a hydraulic draining, unable to carry out remediation; when pumping time 600 ~700 in the range of d, The design of the pumping time required to reach the goal of repairing the total pumping capacity is small, the repair cost is lower; when the design of pumping time is more than 700 D, the repair cost is increased, the 1500 pumping scheme of D compared with 700 D total pumping capacity increased 2.38 * 106m3. comprehensive repair time and repair costs, while pumping time 700 D pumping quantity, but compared with the pumping time optimization scheme of 600 D, the quantity of pumping water by only 1.4%, the economy is poor, so the recommended pumping time by 600 D.

【作者单位】：清华大学环境学院;中节能大地环境修复有限公司;北京建工环境修复股份有限公司;北京清控人居环境研究院有限公司;
【基金】：国家环境保护公益性行业科研专项(201009009) 国家高技术研究发展计划(863)项目(2013AA06A207)
【分类号】：X523
【正文快照】： 我国地下水污染问题严重[1-3].常用的地下水修复方法包括抽出处理技术、ZVI-IRZ(零价铁原位反应带)[4]、MET(多级强化地下水修复)[5]、地下水循环井技术[6]等,其中抽出-处理技术因其适用范围广、修复周期短、修复设备简单等优点而被广泛用于污染地下水的修复.在该技术实施过程

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