国外修复案例精选丨循环井技术处理地下水中氯化溶剂

周周向上 2021-06-08 06:40:25


说明:本着“工匠精神做环保”的理念,周周从各类国外文献中筛选了一批土壤及地下水的治理修复案例供用户参考使用;同时为方便快速浏览,已将案例名称和部分关键内容译为中文。限于能力水平,如有不妥之处,欢迎留言指正!


案例名称:Recirculating Well Technologies at the Massachusetts Military Reservation, CS-10 Plume


周周意译:环井技术处理地下水中氯化溶剂,美国马萨诸塞州军事预留区,CS-10污染羽


术语说明:①关于监测井的布置方式“8 clusters of 3 each,暂译为“共分三处,每处8口成簇布置”。②关于UVB井“with a four-screen design”,暂译为“设计为四筛管(结构)”。以上理解或翻译如有不妥,请专家批评指正


敬请注意:在另一个采用井内空气吹脱技术的案例中,发生了由于铁沉淀和生物滋长而导致的结垢现象,且生物结垢未能得以有效控制。参考时应加以优化和避免。该案例细节明日通过周周向上推送。


特别提醒:在每个案例的费用部分尽量推断并标出了核算年份,以提醒您注意:①资金有时间价值且中外有差;②随着技术进步,类似项目处理费用可能有变化。


持续改进:由于微信公众平台的限制,本案例如有修订,请使用土粒儿APP的《技术案例》功能查阅。


案例摘要


Site Name//场地名称


Massachusetts Military Reservation, CS-10 Plume


Location//所在位置


Cape Cod, Massachusetts


相关图片



资料图:Cape Cod//注意非本场地确切位置(来源:维基百科)


Period of Operation //项目执行时间


Pilot testing - December 21, 1996 - May 1997//1996.12-1997.5:中试


Continued operation of pilot systems through May 4, 1999//中试系统继续运行至1999.5


Cleanup Authority//清理机构


Federal Facilities Agreement 1991


Purpose/Significance of Application/目的与意义


Field demonstration of two recirculating well technologies to treat chlorinated

solvents in groundwater//循环井技术处理地下水中氯化溶剂的现场示范


Cleanup Type:Field demonstration//现场示范


Contaminants//主要污染物


Chlorinated Solvents//氯化溶剂


TCE - 3,200 μg/L, PCE - 500 μg/L, and 1,2-DCE - 58 μg/L


Waste Source//废弃物来源


Fuel spills and leaks from engine maintenance operations and underground  storage tanks//发动机维修工作以及地下储罐中的燃料溢出和泄漏


Technology//技术


UVB recirculating wells (with air stripping)//UVB循环井带空气吹脱


——UVB uses an in-well stripping platform, operated under negative pressure, with a four-screen design//UVB采用一套井内吹脱平台,在负压条件下工作,设计为四筛管(结构)


—— Two UVB wells were used; pumps operated at 39 to 61 gpm; the air stripping unit used an air to water ratio ranging from 120:1 to 150:1//共采用两套UVB井,泵工作流量39-61gpm,空气吹脱单元气水比120:1至150:1


——Air treatment consisted of GAC//空气处理系统由GAC单元组成


NoVOCs recirculating wells (with air stripping)//NoVOCs循环井带空气吹脱


——NoVOCs uses a double-cased, in-well vapor-stripping system; pressurized airlift pumping is used to extract water through screens located at the base of the plume; VOCs are stripped and filtered through GAC; treated water is reinjected//NoVOCs循环井采用双层套管,带井内气体吹脱系统;采用加压气动泵经由污染羽底部筛管抽提地下水;VOCs吹脱后经GAC单元过滤;处理后的水回灌重新注入地下


——Two NoVOCs wells were used; pumps operated at 160 gpm for one well and 140 gpm for the other//采用两口NoVOCs井,其中一口工作流量为160 gpm,另一口为140 gpm。


——24 monitoring wells (8 clusters of 3 each) were used to monitor the

groundwater at each test site//设置24口监测井对每块试验场地的地下水进行监测(共分三处,每处8口成簇布置,如果不妥请专家指正)


Type/Quantity of Media Treated//受污染介质类型及处理量


Groundwater//地下水


——Plume extended approximately 12,500 feet downgradient from the source area, with a width of up to 3,600 feet//污染羽自污染源区下梯度延伸至12500英尺,最宽处达3600英尺


——Three hydrostratigraphic zones were identified beneath the test sites - upper, middle, and lower//该试验场地共划分了表层、中层和底层等三个水文地层


——UVB pilot test treated 23 million gallons; quantity treated not specified for NoVOCs pilot test//UVB中试共处理了230万加仑地下水,NoVOCs中试处理水量未明确。


Regulatory Requirements/Cleanup Goals//清理要求及目标


The pilot tests were conducted to assess the overall feasibility of using recirculating well technology to achieve "significant contaminant reduction”(not further quantified)//该中试试验用于评估采用循环井技术达到“污染物有效减少”(目标)的总体可行性(无更多定量要求)。


A performance standard was established as 1 μg/L for TCE in the discharge from the air stripper, with TCE used as a measure of total VOCs in the water//性能标准:TCE作为水中总VOCs的测量标准,空气吹脱装置所排放的水中TCE为1 μg/L。


Results//清理成效


The cumulative mass of TCE removed by the UVB wells during the pilot test was about 18 kg; TCE concentrations in the groundwater were reduced in the upper and lower hydrostratigraphic zones, and remained relatively stable in the middle zone//本中试试验自UVB well中去除TCE总质量累计约18 kg;水文分层的表层与底层中地下水的TCE浓度有所降低,但在中层中保持相对稳定。


The cumulative mass of TCE removed by the NoVOCs wells during the pilot test was about 43 kg; TCE concentrations in the groundwater remained stable//本中试试验自NoVOCs井中共去除TCE总质量累计约43 kg;地下水中的TCE浓度保持稳定。


The pilot study and continued operation indicated that recirculating well technology reduced concentrations of TCE, PCE, and 1,2-DCE; however, a comparison of the two technologies in terms of contaminant reduction could not be made from the available data for several reasons//中试试验和中试系统的继续工作表明循环井技术降低了TCE、PCE和1,2-DCE的浓度;但出于几个原因,暂无法以现有数据从污染物减少的角度对两种技术进行对比。


Costs//费用


The actual cost for the CS-10 recirculating well pilot test and subsequent operational period was approximately $3,000,000, consisting primarily of costs for drilling ($1,583,000) sampling ($635,000), and construction ($554,000).//CS-10循环井中试和后续运行阶段实际发生费用300万美元,包括钻井(158.3万美元)、取样(63.5万美元)和建设费用(55.4万美元)//推断为1996美元价


Information was not provided about the projected cost for a full-scale treatment system.//未提供工程实施预计费用。


Description//案例综述


MMR is a military training facility located in the upper western portion of Cape Cod, Massachusetts, about 60 miles southeast of Boston. Leaks and spills from historical operations including vehicle maintenance and repair, parts cleaning,

and painting; storage of petroleum products and hazardous materials; and disposal of wastes in landfills resulted in soil and groundwater contamination. A Technical Review and Evaluation Team recommended that pilot-scale testing of recirculating well technology be performed in the southeastern area of the CS-10 plume within the industrial area to evaluate the effectiveness of this innovative technology for reducing concentrations of contaminants in the groundwater.//阐述场地位置、污染成因和本次中试的情况:MMR是一处军事训练场地,由于车辆维修、零部件清洁和喷漆、石油类产品及危险废弃物的储存、填埋场废弃物处置等原因导致了土壤与地下水污染。技术审查和评估小组(TRET)建议在该场地CS-10污染羽东南部区域开展循环井技术中试,以评估该创新技术在降低地下水污染物浓度上的效率。


The pilot testing was performed prior to installation of a groundwater extraction system, identified as the interim remedy for CS-10 groundwater the ROD signed in September 1995.//该中试试验在地下水抽提系统安装之前开展,是CS-10地下水的过渡性修复措施


During the pilot test, the cumulative mass of TCE removed by the UVB wells was about 18 kg and about 43 kg for the NoVOCs system. According to the prime contractor at the site, the results of the pilot tests indicate that recirculating well system hydraulics are more sensitive to site-specific hydrogeologic conditions than extraction, treatment, and reinjection.//自UVB井中去除TCE18kg,自NoVOCs系统中去除TCE43kg。据该项目总承包商(资料),中试试验的结果表明,与抽提、处理和回灌(重新注入地下)等工艺相比,循环井系统水力学对场地特定水文地质条件更加敏感。


In addition, modeling results indicated that the presence of low hydraulic conductivity layers can inhibit the establishment of effective recirculation wells.//另外模拟结果表明,如存在低导水率土层,则可能妨碍循环井的有效工作//或译为会抑制有效循环井的建立(条件)//好理解但不好翻译。


——正文完——


国外修复案例精选系列(持续更新中)


抽出处理、原位化学氧化、土壤气相抽提组合技术修复挥发性有机物污染土壤与地下水


磷酸盐金属稳定化法处理铅污染土(鱼骨法处理铅污染土)


原位蒸汽增效抽提与气相抽提组合技术处理氯化溶剂污染土壤地下水


纳米零价铁修复有机物污染土壤地下水


原位生物反应墙法修复有机物污染地下水


人工湿地法辅助修复锰铝重金属污染矿区


零价铁可渗透反应墙法(ZVI PRB)修复重金属及砷污染地下水


植物法修复镉铅锌污染土壤底泥与地下水


原位化学氧化和热增效SVE法处理含氯溶剂污染土壤与地下水


原位SVE法处理含氯溶剂污染土壤地下水


原位化学还原法处理铬锌铅污染土


植物法修复复合污染土壤与地下水


异位热脱附法处理杀虫剂与无机物污染土


原位电阻加热法处理地下水中的氯化溶剂与PCE DNAPL


原位热脱附技术处理PCBs污染土


原位化学还原法(还原药剂+ISRM处理墙)清理铬污染场地


原位固化/稳定化(生物有机固体+石灰)处理重金属污染矿山废渣


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