WO2022077726A1 - 有机污染地块土水气协同处置工艺 - Google Patents
有机污染地块土水气协同处置工艺 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000011278 co-treatment Methods 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000002689 soil Substances 0.000 claims abstract description 42
- 239000003673 groundwater Substances 0.000 claims abstract description 33
- 230000003647 oxidation Effects 0.000 claims abstract description 29
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 25
- 230000003197 catalytic effect Effects 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000007800 oxidant agent Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 238000005188 flotation Methods 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 11
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 4
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 3
- 239000012028 Fenton's reagent Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims description 2
- 238000005067 remediation Methods 0.000 abstract description 24
- 239000002912 waste gas Substances 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 15
- 239000007924 injection Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 14
- 239000000126 substance Substances 0.000 description 14
- 238000012544 monitoring process Methods 0.000 description 13
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- 238000011065 in-situ storage Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000428 dust Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 238000003895 groundwater pollution Methods 0.000 description 5
- 238000002386 leaching Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000003900 soil pollution Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
Definitions
- the invention belongs to the field of soil remediation, in particular to the field of contaminated plot remediation, and specifically relates to a soil-water-gas co-processing process for organic contaminated plots.
- the remediation of contaminated soil usually includes two types of operations: ex situ remediation and in situ remediation.
- ex situ remediation does not need to excavate and transport soil, the construction is simple, the cost is low, and the disturbance to the environment is small, which is an inevitable trend of the development of site management technology.
- western countries have developed a variety of in-situ remediation technologies, the more typical ones are in-situ chemical oxidation remediation technology, in-situ gas phase extraction technology, in-situ bioremediation technology, in-situ soil leaching technology, in-situ electromagnetic wave frequency heating. technology, in-situ vitrification technology, etc.
- In situ chemical oxidation remediation of organically polluted soil has the characteristics of short remediation period, good effect and low treatment cost, and has received more and more attention.
- organic pollution sites mainly include coking sites, pesticide sites, dye sites, coal-to-gas sites and gas station sites, etc.
- the main pollutants are benzene series, petroleum hydrocarbons, halogenated hydrocarbons and PAHs.
- Organic contaminated soil remediation technologies mainly include thermal desorption, cement kiln incineration, chemical oxidation and bioremediation.
- the chemical oxidation technology of organic contaminated soil is a relatively mature and successful remediation technology developed in recent years. There are a large number of successful engineering application cases at home and abroad.
- Land pollution remediation includes polluted soil and polluted groundwater treatment and waste gas treatment in the process of remediation.
- the restoration site must have a certain construction work surface to meet the needs of various mechanical equipment. The working space can easily bring about secondary pollution. After the restoration of the plot is completed, some equipment will be withdrawn for secondary use, some will be abandoned, and the huge waste of human, material and financial resources will restrict the development of the industry to a certain extent.
- the present invention provides a soil-water-gas co-processing process for organically polluted plots, so as to solve the problems in the prior art.
- a soil-water-gas co-processing process for organically polluted land comprising the following steps:
- One or more tube wells are reasonably arranged in the contaminated area of the block. Each tube well has both extraction and injection functions. One of the two adjacent tube wells is an extraction well and the other is an injection well, forming an orderly group of extraction wells and injection wells. At intervals, the polluted groundwater is pumped out through tube wells, and the polluted groundwater is divided into heavily polluted and mildly polluted according to the "Technical Specifications for Soil Environmental Monitoring" (HJ/T166-2014), and then enters different collection pools.
- HJ/T166-2014 Technical Specifications for Soil Environmental Monitoring
- Air flotation is an existing device, mainly to remove floating oil and suspended solids.
- the general working principle is as follows: the sewage after adding flocculant and reacting enters the mixing area of air flotation, and is mixed and contacted with the released dissolved air and water, so that the floc is sticky. Attached to the fine air bubbles, and then into the air flotation zone. The flocs float to the water surface to form scum under the action of air buoyancy. After the clear water in the lower layer flows to the clear water tank through the water collector, a part of it is returned to be used as dissolved gas water, and the remaining clear water flows out through the overflow port.
- the added amount of the flocculant is 0.2%-4% of the total volume of the solution; the flocculant is any one or more of polyacrylamide, polyaluminum chloride, mass polyaluminum sulfate, and polyferric sulfate.
- the steps of the catalytic oxidation are as follows: adding hydrogen peroxide into the catalytic oxidation device, and catalyzing the oxidation of the solution; the adding amount of the hydrogen peroxide is 0.1%-10% of the total volume of the solution.
- the added amount of the oxidant is 0.1%-10% of the total volume of the solution; the added oxidant is any one or more of hydrogen peroxide, sodium persulfate, potassium permanganate and Fenton's reagent.
- the present invention has the following beneficial effects:
- Each tube well has the function of extraction and injection, which can be switched according to the actual situation to ensure the reasonable dispersion of the injected oxidant solution and the full contact of the contaminated soil.
- the polluted groundwater is directly used for re-injection after on-site treatment, which saves the use of water and reduces the discharge of water.
- the whole system can comprehensively control the polluted soil, polluted groundwater and waste gas generated in the restoration, and truly achieve the restoration of the polluted land without secondary pollution.
- Figure 1 is a flow chart of a soil-water-gas co-processing process for organically polluted plots.
- the organic pollution depth of a chemical enterprise in production is 3-6 meters, and the groundwater pollution depth is 5 meters.
- the chemical oxidation technology combined with the scope of groundwater and soil pollution, considers the current situation of the company's production, and uses the following remediation process to remediate the soil. The steps are as follows:
- the area of the blocking pile wall in this block is about 60000 m 3 , the number of designed pipe wells in the blocking area is 117, the depth is 12 meters, there are 11 monitoring wells, and 4 control wells outside the block; one of the two adjacent pipe wells is drawn out One of the wells is an injection well, forming an orderly interval between the extraction well group and the injection well group;
- step ( 3 ) (4) carry out water conservancy cavitation air flotation treatment with the heavily polluted water after gas-liquid separation in step ( 3 ): add the flocculant (polyaluminum chloride) of total volume about 200m in the solution to carry out water conservancy cavitation air flotation Treatment, post-filtration, to produce 500kg of flocs (flocculation and precipitation in heavy pollution, the water volume will be reduced by a small amount, which is negligible relative to 20000m3 , so it is ignored);
- flocculant polyaluminum chloride
- Table 2 Groundwater monitoring data in two years of polluted land of a production enterprise
- the organic pollution depth of a chemical enterprise in production is 2-4 meters, and the groundwater pollution depth is 3 meters.
- the chemical oxidation technology combined with the scope of groundwater and soil pollution, considers the current situation of the company's production, and uses the following remediation process to remediate the soil. The steps are as follows:
- the area of the block wall of the block is about 30000m 3 , the number of designed pipe wells in the block area is 87, the depth is 10 meters, there are 4 monitoring wells, and 4 control wells outside the block; one of the two adjacent pipe wells is drawn out One of the wells is an injection well, forming an orderly interval between the extraction well group and the injection well group;
- the polluted groundwater is extracted through the tube well in the upstream area, and the total amount of the extracted polluted groundwater is about 40,000m 3 . 3 ) and slightly polluted water (28000m 3 );
- step ( 3 ) (4) carry out water conservancy cavitation air flotation treatment to the heavily polluted water after gas-liquid separation in step ( 3 ): add a flocculant (polyacrylamide) with a total volume of about 120 m to the solution, and carry out water conservancy cavitation air flotation Treatment, post-filtration, to produce 300kg of flocs (flocculation and precipitation are carried out in heavy pollution, and the water volume will be reduced by a small amount, which can be ignored relative to 12000m3 , so it is ignored);
- a flocculant polyacrylamide
- Table 4 Groundwater monitoring data in two years of polluted land of a production enterprise
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
一种有机污染地块土水气协同处置工艺，包括以下步骤：在地块污染区域布置一个及一个以上的管井；将污染地下水通过上游地区的管井抽出，经过气液分离、水利空化气浮处理、催化氧化处理后，对催化氧化后的水进行水质检测，向达标后的水中加入氧化剂回注至下游地区的管井中；直至污染土壤和污染地下水达标；上述工艺可对污染土壤、污染地下水和修复中产生的废气综合治理，修复污染地块，不产生二次污染。
Description
本发明属于土壤修复领域，特别是污染地块修复领域，具体涉及到一种有机污染地块土水气协同处置工艺。
污染土壤的修复通常包括异位修复和原位修复两种操作方式。其中，原位修复不需要挖掘和输送土壤，施工简单，成本较低，对环境的扰动小，是场地治理技术发展的必然趋势。近几十年来西方国家发展了多种原位修复技术，比较典型的有原位化学氧化修复技术、原位气相抽出技术、原位生物修复技术、原位土壤淋洗技术、原位电磁波频率加热技术、原位玻璃化技术等。有机污染土壤的原位化学氧化修复具有修复周期短、效果好、处理成本低等特点，受到越来越广泛的关注。
随着我国工业化和城市化进程的加快以及化学物质种类、数量的增加，国内土壤和地下水污染问题日益严重，污染程度不断加深，由此造成的健康与环境生态问题引起广泛关注。有机污染场地类型主要包括焦化类场地、农药类场地、染料类场地、煤制气类场地及加油站类场地等，主要污染物为苯系物、石油烃、卤代烃及PAHs等。有机污染土壤修复技术主要包括热脱附、水泥窑焚烧、化学氧化及生物修复等。有机污染土壤化学氧化技术是近年来发展起来的较为成熟和成功的修复技术，在国内外有大量成功的工程应用案例，是一种高效且 成本适中的污染土壤和地下水修复技术。
地块污染修复包括污染土壤和污染地下水处理及修复过程中废气治理，针对不同的介质，一般需要不同的工艺，不同的设备和技术，修复现场要有一定的施工作业面，满足各种机械设备作业空间，极易带来二次污染。地块修复完成后，部分设备撤走二次利用，部分遗弃，人力物力财力的巨大浪费，一定程度上制约着行业的发展。
发明内容
本发明针对现有技术中存在的不足，提供了一种有机污染地块土水气协同处置工艺，以解决现有技术中存在的问题。
为实现上述目的，本发明采用的技术方案如下：
一种有机污染地块土水气协同处置工艺，包括以下步骤：
(1)地块污染区域合理布置一个及一个以上管井，每个管井兼具抽出和注入功能，相邻两个管井一个是抽出井一个是注入井，形成抽出井群和注入井群的有序间隔，污染地下水通过管井将地下水抽出，按照《土壤环境监测技术规范》(HJ/T166-2014)将污染地下水分成重度污染和轻度污染，分别进入不同的收集池。
(2)两个收集池的污染水都进行气液分离，气体进入废气治理装置，经过多级催化氧化湿法电氧化除尘后达标高空排放。
(3)将(2)中气液分离的重度污染水经过水利空化气浮处理后，与(2)中气液分离后的轻度污染水一并送入至催化氧化装置内，进行多相催化氧化；
气浮为现有的装置，主要是去除浮油和悬浮物，大致工作原理如下：加入絮凝剂反应后的污水进入气浮的混合区，与释放后的溶气水混合接触，使絮凝体粘附在细微气泡上，然后进入气浮区。絮凝体在气浮力的作用下浮向水面形成浮渣，下层的清水经集水器流至清水池后，一部分回流作溶气水使用，剩余清水通过溢流口流出。
优选的，絮凝剂的加入量为溶液总体积的0.2％-4％；絮凝剂为聚丙烯酰胺、聚合氯化铝、质聚合硫酸铝、聚合硫酸铁中任意一种或几种。
催化氧化的步骤如下：向催化氧化装置中加入双氧水，并对溶液进行催化氧化；双氧水的加入量为溶液总体积的0.1％-10％。
(4)将(3)催化氧化的水进行水质检测，向达标后(即达到地块地下水修复目标值和《地下水环境质量标准》(GB/T18418-2017))的水中加入氧化剂回注至注入井中，抽出井和注入井同时工作，进而形成水力梯度，含化学氧化剂的水溶液由注入井通过污染土壤区域进入低水位的抽出井，化学氧化剂对经过的污染土壤和地下水进行充分的接触氧化，达到不断循环淋洗的目的，重复上述(1)到(4)步骤，直至污染土壤和地下水达标。
优选的，氧化剂的加入量为溶液总体积的0.1％-10％；加入氧化剂为双氧水、过硫酸钠、高锰酸钾、芬顿试剂中任意一种或几种。
由于采用了以上技术，本发明较现有技术相比，具有的有益效果如下：
(1)每个管井都有抽出和注入功能，可根据实际情况切换功能，确保注入氧化剂溶液的合理分散与污染土体的充分接触。
(2)对污染土体有淋洗和氧化的双重功能，且对污染地下水和土壤通过此种工艺一同治理，无需设计两套治理方案。
(3)污染地下水经现场处理后直接用于回注水，节省了水的使用，减少了水的排出量。
(4)整套系统可对污染土壤、污染地下水和修复中产生的废气综合治理，真正达到污染地块修复，不产生二次污染。
图1是一种有机污染地块土水气协同处置工艺的流程图。
下面结合附图和具体实施方式，进一步阐明本发明。
实施例1
某在产化工企业地块内有机物污染深度3-6米，地下水污染深度5米，厂区内有大量的厂房、设施等构筑物，不适合大面积的土体开挖，污染地块拟采用原位化学氧化技术，结合地下水和土壤的污染范围，考虑企业在产的现状，采用以下的修复工艺对土壤进行修复，步骤如下：
(1)本地块阻隔桩墙的面积约为60000m
3，阻隔区域内设计管井数量117口，深度12米，监测井11口，地块外对照井4口；相邻两个管井一个是抽出井一个是注入井，形成抽出井群和注入井群的有序间隔；
(2)将污染地下水通过上游地区的管井抽出，抽出的污染地下水总量约100000m
3，按照《土壤环境监测技术规范》(HJ/T166-2014)将抽出的污染地下水分为重度污染水(20000m
3)和轻度污染水(80000m
3)；
(3)将重度污染水和轻度污染水分别进行气液分离后，得到重度污染水(20000m
3)和轻度污染水(80000m
3)；经过气液分离后产生的气体经过多级催化氧化进行除尘，除尘达标后高空排放；
(4)将步骤(3)中经过气液分离后的重度污染水进行水利空化气浮处理：向溶液中加入总体积约200m
3的絮凝剂(聚合氯化铝)进行水利空化气浮处理，后过滤，产生500kg絮凝物(重度污染进行絮凝沉淀，水量会少量的减少，相对于20000m
3来说可以忽略不计，故忽略)；
(5)将经过步骤(3)气液分离后的轻度污染水(80000m
3)与经过步骤(4)处理过的重度污染水(20000m
3)一并送入至催化氧化装置内，向溶液中加入总体积约500m
3的27.5％的双氧水，并进行催化氧化；
(6)对催化氧化后的水进行水质检测，是否符合地块地下水修复目标值和《地下水环境质量标准》(GB/T18418-2017)，向达标后的水(100000m
3)中，加入总体积约800m
3的氧化剂(27.5％双氧水)回注至下游地区的管井中；抽出井和注入井同时工作，进而形成水力梯度，含化学氧化剂的水溶液由注入井通过污染土壤区域进入低水位的抽出井，化学氧化剂对经过的污染土壤和地下水进行充分的接触氧 化，重复上述(1)到(6)步骤，达到不断循环淋洗的目的，直至污染土壤和地下水达标。
经2年修复后，测定污染土壤和地下水相关指标。
地块污染土壤修复两年后，部分土壤监测数据如下表1所示：
表1：某在产企业污染地块两年内土壤监测数据
地块污染土壤修复两年后，监测井和对照井监测数据如下表2所示：
表2：某在产企业污染地块两年内地下水监测数据
实施例2
某在产化工企业地块内有机物污染深度2-4米，地下水污染深度3米，厂区内有大量的厂房、设施等构筑物，不适合大面积的土体开挖，污染地块拟采用原位化学氧化技术，结合地下水和土壤的污染范围，考虑企业在产的现状，采用以下的修复工艺对土壤进行修复，步骤如下：
(1)本地块阻隔桩墙的面积约为30000m
3，阻隔区域内设计管井数量87口，深度10米，监测井4口，地块外对照井4口；相邻两个管井一个是抽出井一个是注入井，形成抽出井群和注入井群的有序间隔；
(2)将污染地下水通过上游地区的管井抽出，抽出的污染地下水总量约40000m
3，按照《土壤环境监测技术规范》(HJ/T166-2014)将抽出的污染地下水分为重度污染水(12000m
3)和轻度污染水(28000m
3)；
(3)将重度污染水和轻度污染水分别进行气液分离后，得到重度污染水(12000m
3)和轻度污染水(28000m
3)；经过气液分离后产生的气体经过多级催化氧化进行除尘，除尘达标后高空排放；
(4)将步骤(3)中经过气液分离后的重度污染水进行水利空化气浮处理：向溶液中加入总体积约120m
3的絮凝剂(聚丙烯酰胺)，进行水利空化气浮处理，后过滤，产生300kg絮凝物(重度污染进行絮凝沉淀，水量会少量的减少，相对于12000m
3来说可以忽略不计，故忽略)；
(5)将经过步骤(3)气液分离后的轻度污染水(28000m
3)与经过步骤(4)处理过的重度污染水(12000m
3)一并送入至催化氧化装置内，向溶液中加入总体积约240m
3的27.5％双氧水，并进行催化氧化；
(6)对催化氧化后的水进行水质检测，是否符合地块地下水修复目标值和《地下水环境质量标准》(GB/T18418-2017)，向达标后的水(40000m
3)中，加入总体积约200m
3的25％的过硫酸钠回注至下游地区的管井中；抽出井和注入井同时工作，进而形成水力梯度，含化学氧化剂的水溶液由注入井通过污染土壤区域进入低水位的抽出井，化学氧化剂对经过的污染土壤和地下水进行充分的接触氧化，重复上述(1)到(6)步骤，达到不断循环淋洗的目的，直至污染土壤和地下水达标。
经2年修复后，测定污染土壤和地下水相关指标。
地块污染土壤修复两年后，部分土壤监测数据如下表3所示：
表3：某在产企业污染地块两年内土壤监测数据
地块污染土壤修复两年后，监测井和对照井监测数据如下表4所示：
表4：某在产企业污染地块两年内地下水监测数据
上述实施例仅为本发明的优选技术方案，而不应视为对于本发明的限制，本发明的保护范围应以权利要求记载的技术方案，包括权利要求记载的技术方案中技术特征的等同替换方案为保护范围，即在此范围内的等同替换改进，也在本发明的保护范围之内。
Claims (7)
- 一种有机污染地块土水气协同处置工艺，其特征在于，包括以下步骤：(1)在地块污染区域布置一个及一个以上的管井；(2)将污染地下水通过上游地区的管井抽出，按照污染物浓度将抽出的污染地下水分为重度污染水和轻度污染水；(3)将重度污染水和轻度污染水分别进行气液分离；(4)将步骤(3)中经过气液分离后的重度污染水进行水利空化气浮处理；(5)将经过步骤(3)处理后的轻度污染水与经过步骤(4)处理过的重度污染水送入至催化氧化装置内，并进行催化氧化；(6)对催化氧化后的水进行水质检测，向达标后的水中加入氧化剂回注至下游地区的管井中；(7)重复上述(1)到(6)步骤，直至污染土壤和污染地下水达标。
- 根据权利要求1所述的一种有机污染地块土水气协同处置工艺，其特征在于：步骤(3)中经过气液分离后产生的气体经过多级催化氧化进行除尘，除尘达标后高空排放。
- 根据权利要求1所述的一种有机污染地块土水气协同处置工艺，其特征在于：步骤(4)中水利空化气浮处理的步骤如下：向溶液中加入絮凝剂进行水利空化气浮处理。
- 根据权利要求3所述的一种有机污染地块土水气协同处置工艺， 其特征在于：步骤(4)中絮凝剂的加入量为溶液总体积的0.2％-4％。
- 根据权利要求3所述的一种有机污染地块土水气协同处置工艺，其特征在于：步骤(4)中絮凝剂为聚丙烯酰胺、聚合氯化铝、聚合硫酸铝或聚合硫酸铁中任意一种或几种。
- 根据权利要求1所述的一种有机污染地块土水气协同处置工艺，其特征在于：步骤(6)中氧化剂的加入量为溶液总体积的0.1％-10％。
- 根据权利要求6所述的一种有机污染地块土水气协同处置工艺，其特征在于：步骤(6)中加入氧化剂为双氧水、过硫酸钠、高锰酸钾或芬顿试剂中任意一种或几种。
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