Simulation test device and simulation test method for in-situ chemical and biological remediation of underground water

A bioremediation and simulation test technology, which is applied in testing water, material inspection products, general water supply saving, etc., can solve the problems of unclear influence of the migration, transformation and degradation rules of organic pollutants, limited treatment scope, and high treatment costs. , to achieve the effect of high promotion and use value, low test cost and strong process controllability

Active Publication Date: 2014-03-12
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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Problems solved by technology

Ex-situ pumping treatment is a representative technology of early groundwater remediation, which is widely used, but it has disadvantages such as high treatment cost, limited treatment scope and poor remediation effect in the later stage; practice shows that in-situ chemical and biological treatment of organic pollutants in groundwater can reach It has high removal efficiency, low cost, simple construction, wide repair range, less environmental disturbance and low probability of pollutant exposure, etc., so it is more and more popular and concerned by people, and its application prospect is very broad. It is widely used in European and American countries It has gradually become the mainstream organically polluted groundwater remediation technology
[0004] Due to the complexity, variability, and invisibility of the underground environment, the impact of chemical and biological enhancement measures on the migration, transformation, and degradation of organic pollutants in the underground aquifer is not very clear, so that it is impossible to improve the organic pollutants in a targeted manner. Therefore, it is necessary to study the mechanism of in-situ chemical, biological and their combined enhancement measures to promote the degradation of organic pollutants in groundwater under indoor conditions.
At present, laboratory research in this field is mainly carried out under static or one-dimensional dynamic conditions, which cannot fully reflect the environmental behavior characteristics of pollutants in underground aquifers. Therefore, it is necessary to develop an A small-scale simulation device for the dynamic process of in-situ chemical and biological remediation of organically polluted groundwater, to explore the mechanism of chemical and biological intensified treatment of organically polluted groundwater, and provide a reliable theoretical basis and basic parameters for the development of groundwater remediation technology

Method used

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  • Simulation test device and simulation test method for in-situ chemical and biological remediation of underground water

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Embodiment 1

[0044] Such as Figure 1~5 As shown, a kind of groundwater in-situ chemical and bioremediation simulation test device of the present invention mainly includes rectangular seepage tank 6, water inlet buffer tank 4, water outlet buffer tank 14, water supply device and liquid recovery bottle 20, wherein, water supply device consists of The sequentially connected nitrogen bag 1, liquid storage bottle 3 and peristaltic pump 2 are composed; the water supply device is connected to the bottom of the water inlet buffer tank 4 through a water delivery hose, and the water inlet side and the water outlet side of the percolation tank 6 are respectively passed through a porous cloth water partition 7 It is connected with the water inlet buffer tank 4 and the water outlet buffer tank 14, and the outer sides of the water outlet buffer tank 14 are respectively provided with drain holes with valves at different heights (i.e. figure 1 drain hole and valve 15 in the middle), the drain hole is con...

Embodiment 2

[0052] A kind of groundwater in-situ chemical and bioremediation simulation test device that utilizes embodiment 1 to carry out, the simulated test method of the in-situ chemical-biological combined repair process of chlorinated hydrocarbon polluted groundwater under simulated anaerobic conditions is as follows:

[0053] During the test, first open the flanged plexiglass top plate 8-2 on the top of the seepage tank 6, and put coarse sand into the tank body as the aquifer medium. It needs to be paved and compacted. The filling height of the aquifer is 25cm, and the surface of the aquifer medium is filled with 6cm thick clay as an air-entrained zone to prevent the volatilization of chlorinated hydrocarbon pollutants. While filling the aquifer medium, the injection well pipe 10 and the monitoring well pipe 11 are also loaded into the tank body from the top of the tank according to certain longitudinal and transverse layouts. There are 5 injection well pipes in total, which are e...

Embodiment 3

[0058] Another kind of groundwater in-situ chemical and bioremediation simulation test device that utilizes embodiment 1 to carry out, the simulated test method of the in-situ chemical-biological joint remediation process of chlorinated hydrocarbon polluted groundwater under simulated anaerobic conditions, basically with embodiment 2 Same, except that:

[0059]Every 2cm high coarse sand needs to be paved and compacted. The filling height of the aquifer is 15cm, and the upper surface of the aquifer medium is filled with 2cm thick clay as the aerated zone; there are 2 injection well pipes, the distance between the pipes is 9cm, the bottom of the pipe is 5cm from the bottom of the seepage tank, and 10cm from the water inlet of the tank; There are 3 rows of monitoring wells in the seepage tank, of which 1 row of monitoring wells is upstream of the injection well, 15cm away from the injection well, and the other 2 rows of monitoring wells are arranged downstream of the injection we...

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Abstract

The invention discloses a simulation test device and a simulation test method for in-situ chemical and biological remediation of underground water. The simulation test device comprises a seepage slot, an inlet water buffer slot, an outlet water buffer slot, a water supply device and a liquid recovering bottle; the seepage slot is respectively communicated with the inlet water buffer slot and the outlet water buffer slot through porous water distribution baffles; the outer side of the outlet water buffer slot is provided with a drain hole with a valve; the seepage slot is provided with a row of injection wells at the upstream and a plurality of monitoring wells inside, and the monitoring wells are internally provided with water quality analysis probes; the tops of the seepage slot and the inlet water buffer slot are provided with a top sealed plate in which air inlets and air outlets are arranged; and the side wall of the seepage slot is provided with a pressure measuring pipe. The method comprises: filling with a medium, saturating with water, introducing polluted underground water by pumping, and adding a reagent for simulating the in-situ chemical and biological remediation process. The simulation test device is flexible, simple and convenient in design, low in test cost and strong in process controllability, can be used for researching the dynamic effect and the action mechanism for chemical and biological enhanced treating on organically-polluted underground water under an in-situ condition, and also can be used for observing the attenuation process of specific pollutants in underground water.

Description

technical field [0001] The invention belongs to the technical field of groundwater treatment, and specifically relates to a groundwater in-situ chemical and biological restoration simulation test device and a simulation test method that can accurately reflect the in-situ restoration of organically polluted groundwater by chemical and biological enhancement techniques. Background technique [0002] As an important fresh water resource, groundwater is closely related to human life. With the continuous development of industrial and agricultural production, the pollution of groundwater in my country is becoming more and more serious. Among them, the pollution of organic substances such as chlorinated hydrocarbons, benzene series and petroleum hydrocarbons has surpassed the pollution of heavy metals, and has become the main form of groundwater pollution at present, which is harmful to the ecological environment and human health. Therefore, it has become one of the important resear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/18
CPCY02A20/20
Inventor 罗启仕孟梁郭琳李炳智朱杰
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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