CN113105079A - Polluted underground water remediation method - Google Patents
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Abstract
The invention relates to a polluted underground water remediation method, which comprises the following steps that a self-sucking tank utilizes atmospheric pressure and pressure difference of a lifting pump to enable polluted underground water to sequentially pass through a lifting pipeline, the self-sucking tank and the lifting pump and be conveyed into a neutralization tank; the reagent is added from the top of the neutralization tank and is mixed with the polluted underground water to obtain primarily-repaired underground water; and filtering the primarily repaired underground water through a multi-stage membrane filtration water purifier and a reverse osmosis membrane to obtain the repaired underground water. According to the invention, the polluted underground water is restored by means of self-priming tank homogenization, neutralization tank degradation of stubborn substances, multi-stage membrane filtration water purifier and reverse osmosis membrane impurity filtration, and the used restoration equipment has the advantages of simple installation, convenience in operation and low maintenance cost, so that the restoration efficiency of the underground water is ensured, and meanwhile, the restoration method can be effectively used for restoring the underground water pollution for a long time.
Description
Technical Field
The invention relates to the technical field of polluted underground water remediation, in particular to a remediation method of polluted underground water.
Background
In recent years, national economy is rapidly developed, along with the large-scale occurrence of environmental pollution events, the leakage and the theft discharge of wastewater containing heavy metals and overproof organic pollutants pollute underground water in a soil permeation mode and other modes, further, the overproof of pesticides, heavy metals and the like in the underground water is caused, and the health of people is seriously threatened. Currently, groundwater pollution is receiving increasing attention from countries throughout the world as a problem that limits the sustainable development of human society.
Groundwater remediation is a method measure for restoring normal indexes of contaminated groundwater, and refers to the physical, chemical and biological methods used to transfer, absorb, degrade and transform pollutants in groundwater to reduce the concentration of the pollutants to an acceptable level, or to transform toxic and harmful pollutants into harmless substances. Fundamentally, the method principle of remediation of contaminated groundwater may include: (1) changing the existing form of the pollutants in the underground water or the combination mode of the pollutants and the underground water, and reducing the mobility and the bioavailability of the pollutants in the environment; (2) reducing the concentration of harmful substances in the groundwater.
Chinese patent publication No. CN111302556A discloses a method for remediating groundwater in a pesticide-contaminated site, which comprises the following steps: homogenizing and adjusting underground water of a pesticide-polluted site; performing magnetic coagulation treatment on the homogenized and adjusted water body; adjusting the water body after the magnetic coagulation treatment to be acidic and carrying out micro-electrolysis treatment; adjusting the water body after micro-electrolysis treatment to be acidic and carrying out heterogeneous catalytic oxidation treatment; adjusting the water body after the heterogeneous catalytic oxidation treatment to be alkaline, and sequentially performing flocculation and precipitation to obtain a supernatant; pumping the supernatant into an activated carbon adsorption tank for adsorption treatment, and discharging after reaching the standard.
The groundwater remediation method mainly comprises the steps of homogenizing adjustment, magnetic coagulation treatment, micro-electrolysis treatment, homogeneous catalytic oxidation treatment, flocculation precipitation, activated carbon adsorption and the like in sequence, namely, pollutants such as pesticides, heavy metals and the like are separated by adopting a physicochemical combined treatment mode. However, the above prior art solutions have the following drawbacks: the groundwater remediation method not only has complex steps, but also needs a plurality of large-scale equipment such as a supermagnetic separator, a micro-electrolysis reaction tower, an activated carbon adsorption tank and the like to form a degradation separation system, thereby increasing the maintenance cost, and the activated carbon adsorption tank and the like are generally in a mode of a filler fixed bed, and are not easy to recover after an activated carbon filler layer fails, thereby further increasing the maintenance cost. Therefore, there is a need for a method that is low in maintenance cost and effective for groundwater pollution remediation over a long period of time.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a method for restoring polluted underground water, which achieves the aims of low maintenance cost and long-term effective restoration of underground water pollution by optimizing a restoration process and restoration equipment.
The above object of the present invention is achieved by the following technical solutions:
a method for remediating contaminated groundwater comprising the steps of,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to enable the polluted underground water to sequentially pass through the lift pipeline, the self-priming tank and the lift pump and be conveyed into the neutralization tank;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to remove small particulate matters with the particle size of more than 0.1 mu m and obtain primarily filtered underground water;
s4 filtering the primarily filtered groundwater obtained in S3 with a reverse osmosis membrane to remove dissolved salts and organic substances of 0.1nm or more, thereby obtaining restored groundwater.
By adopting the technical scheme, because the inlet end of the lifting pipeline extends into the underground water, when the lifting pump works, negative pressure can be formed in the self-suction tank, so that polluted underground water is conveyed into the self-suction tank through the lifting pipeline, although the whole underground water is in a continuous conveying state, newly pumped underground water can be mixed with the underground water reserved in the self-suction tank, so that the water quality and the water quantity are relatively stable, the whole underground water repairing process can stably and efficiently run, and a good homogenizing effect is achieved while high efficiency is considered; then, the homogenized underground water is fully mixed with the medicament in the neutralization tank, pollutants in the underground water are degraded and separated by the medicament, so that stubborn substances are removed in advance in a flocculation precipitation mode, and the subsequent treatment capacity for repairing the underground water is reduced; then, filtering twice through a multi-stage membrane filtration water purifier and a reverse osmosis membrane, and completing remediation of groundwater pollution; in this in-process, through the mode restoration groundwater of self priming jar homogeneity, the stubborn material of neutralization jar degradation, multistage membrane filtration water purifier and reverse osmosis membrane filtration impurity, and the repair equipment who uses has the advantage that the installation is simple, convenient operation, maintenance cost hang down to when guaranteeing groundwater remediation efficiency, can effectively be used for groundwater pollution restoration for a long time.
Furthermore, be provided with the filter screen that is used for filtering large granule grit in the lifting pipe. Before polluted underground water enters the neutralization tank, large-particle sand stones are filtered through the filter screen, the neutralization tank can be prevented from being worn by the sand stones, and the repair efficiency can be improved.
Further, in the step S1, the length of the section of the lifting pipeline extending into the ground is 50-100m, the compressive strength is 5-10MPa, and the wall thickness is not less than 6 mm; the effective volume of the self-sucking tank is 0.2-0.3m in thin wall thickness not less than 0.5 mm; the lift pump is a plunger pump with variable-frequency regulation control, the rated flow is 5-12m in weight, and the lift is 100-150m in weight. Under the equipment parameters, the method has the best repair efficiency.
Further, in the step S2, the dosage of the medicament per cubic meter of underground water is 21-233 g. And (3) selecting a specific numerical value to add the medicament within the range of the adding amount so as to adjust the pH value of the underground water to a preset value.
Further, in the step S2, the medicament comprises the following raw materials, by weight, 10-200 parts of a pH adjusting agent, 10-30 parts of a chemical flocculating agent and 1-3 parts of a microbial flocculating agent.
Preferably, the pH regulator is lime water, and the chemical flocculant is polyacrylamide. The lime water is used for adjusting the pH value of underground water, can promote stubborn substances to precipitate and can also play a role in sterilization; the addition of polyacrylamide can improve the dehydration efficiency of underground water, and the biological decomposability of the microbial flocculant can promote the flocculation and precipitation of stubborn substances and microorganisms, so that pesticides, partial heavy metals, microorganisms and the like are degraded and separated from the underground water.
Further, in S3, the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element, which can remove silt, rust, solid pollutants, and the like more than 1 μm from the groundwater; the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element which can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water; the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element, and can remove microorganisms, bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m. The separators between stages of the multi-stage membrane filtration water purifier are thin films which are made of graphene and are provided with channels through which water molecules only pass, and then the small-particle impurities are sequentially filtered through the pp cotton filter element, the activated carbon filter element and the fine pp filter element, so that the multi-stage membrane filtration water purifier can be recovered in a backwashing mode while the repair efficiency and the repair quality are considered, and the maintenance cost is reduced.
And further, the method comprises the following steps of conveying the repaired underground water obtained in the step S4 into a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%. This way, energy consumption can be reduced, and then the maintenance cost is reduced.
Preferably, the length of the section of the pressurizing pipeline extending into the ground is 50-100m, the compressive strength is 10-15MPa, and the wall thickness is not less than 10 mm; the high-pressure pump is a plunger pump with variable-frequency regulation control, the rated flow is 5-12m in weight, and the lift is 100-150m in weight. Under the equipment parameters, the method has the best repair efficiency.
Preferably, the lifting pipeline, the self-sucking tank, the lifting pump, the neutralizing tank, the multi-stage membrane filtration water purifier, the reverse osmosis membrane, the water outlet tank, the high-pressure pump and the pressurizing pipeline are all made of stainless steel or alloy materials with corrosion resistance, ageing resistance and high pressure resistance.
In conclusion, the beneficial technical effects of the invention are as follows: through the mode restoration groundwater of self priming jar homogeneity, the stubborn material of neutralization jar degradation, multistage membrane filtration water purifier and reverse osmosis membrane filtration impurity, and the repair equipment who uses has the installation simply, convenient operation, advantage that the maintenance cost is low to when guaranteeing groundwater remediation efficiency, can effectively be used for groundwater pollution to restore for a long time.
Drawings
FIG. 1 is a flow chart of the remediation method of contaminated groundwater of the present invention.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the invention clearer and easier to understand, the invention is further explained in the following with the accompanying drawings and the detailed description.
Examples
Example 1: referring to fig. 1, the method for remedying contaminated groundwater disclosed by the present invention includes the following steps of homogenizing, degrading, filtering, recovering and the like the contaminated groundwater by using a sewage treatment system to obtain purified groundwater.
Wherein, sewage treatment system adopts to possess corrosion-resistant, ageing-resistant, high pressure resistant stainless steel or alloy material and makes, and it includes that the pipeline that has the filter screen that connects in order along groundwater direction of delivery, self priming jar, elevator pump, neutralization tank, multistage membrane filtration water purifier, reverse osmosis membrane, play water tank, high-pressure pump and pressurization pipeline.
S1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to lead the polluted underground water to pass through the self-priming tank and the lift pump in sequence and be conveyed into the neutralization tank after large-grained sandstone is removed by a filter screen of the lift pipeline; wherein the length of the region of the lifting pipeline extending into the ground is 50m, the compressive strength is 5MPa, and the wall thickness is 6 mm; performing thin-wall cultivation on the self-sucking tank with an effective volume of 0.2m and a wall thickness of 0.5 mm; the lift pump is a plunger pump controlled by variable frequency regulation, the rated flow is 5m, and the lift is 100 m;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water; the dosage of the medicament per cubic meter of underground water is 42g, and the medicament comprises the following raw materials in parts by weight, 10 parts of lime water, 30 parts of polyacrylamide and 2 parts of microbial flocculant;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to obtain primarily filtered underground water; the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water, the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element and can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water, and the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element and can remove microbial bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m;
s4, filtering the primarily filtered underground water obtained in the step S3 through a reverse osmosis membrane to remove dissolved salts, organic matters and the like with the particle size of more than 0.1nm to obtain restored underground water;
s5, conveying the repaired underground water obtained in the step S4 to a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%; wherein the length of the region of the pressurizing pipeline extending into the ground is 50m, the compressive strength is 10MPa, and the wall thickness is 10 mm; high-pressure pump is frequency conversion regulation control's plunger pump, and rated flow is 5m, and the lift is 100 m.
In the repaired groundwater, the removal rate of COD is 85%, the removal rate of TP is 98%, the removal rate of TN is 98% and the removal rate of heavy metals is 91%.
Example 2: the method for remedying the polluted groundwater disclosed by the invention is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to lead the polluted underground water to pass through the self-priming tank and the lift pump in sequence and be conveyed into the neutralization tank after large-grained sandstone is removed by a filter screen of the lift pipeline; wherein the length of the region of the lifting pipeline extending into the ground is 60m, the compressive strength is 7MPa, and the wall thickness is 7 mm; performing thin-wall cultivation on the self-sucking tank with the effective volume of 0.2m and the wall thickness of 0.6 mm; the lift pump is a plunger pump controlled by variable frequency regulation, the rated flow is 7m, and the lift is 110 m;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water; the dosage of the medicament per cubic meter of underground water is 76g, and the medicament comprises the following raw materials, by weight, 50 parts of lime water, 25 parts of polyacrylamide and 1 part of microbial flocculant;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to obtain primarily filtered underground water; the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water, the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element and can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water, and the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element and can remove microbial bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m;
s4, filtering the primarily filtered underground water obtained in the step S3 through a reverse osmosis membrane to remove dissolved salts, organic matters and the like with the particle size of more than 0.1nm to obtain restored underground water;
s5, conveying the repaired underground water obtained in the step S4 to a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%; wherein the length of the region of the pressurizing pipeline extending into the ground is 60m, the compressive strength is 12MPa, and the wall thickness is 11 mm; high-pressure pump is frequency conversion regulation control's plunger pump, and rated flow is 7m heavy planting, and the lift is 110 m.
In the repaired groundwater, the removal rate of COD is 87%, the removal rate of TP is 97%, the removal rate of TN is 98% and the removal rate of heavy metals is 93%.
Example 3: the method for remedying the polluted groundwater disclosed by the invention is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to lead the polluted underground water to pass through the self-priming tank and the lift pump in sequence and be conveyed into the neutralization tank after large-grained sandstone is removed by a filter screen of the lift pipeline; wherein the length of the region of the lifting pipeline extending into the ground is 75m, the compressive strength is 8MPa, and the wall thickness is 8 mm; carrying out thin film self-priming canister dry-mass cultivation with effective volume of 0.3m and wall thickness of 0.7 mm; the lift pump is a plunger pump controlled by variable frequency regulation, the rated flow is 9m, and the lift is 125 m;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water; the dosage of the medicament per cubic meter of underground water is 123g, and the medicament comprises the following raw materials in parts by weight, 100 parts of lime water, 20 parts of polyacrylamide and 3 parts of microbial flocculant;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to obtain primarily filtered underground water; the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water, the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element and can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water, and the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element and can remove microbial bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m;
s4, filtering the primarily filtered underground water obtained in the step S3 through a reverse osmosis membrane to remove dissolved salts, organic matters and the like with the particle size of more than 0.1nm to obtain restored underground water;
s5, conveying the repaired underground water obtained in the step S4 to a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%; wherein the length of the section of the pressurizing pipeline extending into the ground is 75m, the compressive strength is 13MPa, and the wall thickness is 12 mm; high-pressure pump is frequency conversion regulation control's plunger pump, and rated flow is 9m heavy planting, and the lift is 125 m.
In the repaired underground water, the removal rate of COD is 92%, the removal rate of TP is 95%, the removal rate of TN is 96% and the removal rate of heavy metals is 94%.
Example 4: the method for remedying the polluted groundwater disclosed by the invention is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to lead the polluted underground water to pass through the self-priming tank and the lift pump in sequence and be conveyed into the neutralization tank after large-grained sandstone is removed by a filter screen of the lift pipeline; wherein the length of the region of the lifting pipeline extending into the ground is 90m, the compressive strength is 9MPa, and the wall thickness is 9 mm; carrying out thin film self-priming canister dry-mass cultivation with effective volume of 0.3m and wall thickness of 0.8 mm; the lift pump is a plunger pump controlled by variable frequency regulation, the rated flow is 10m, and the lift is 130 m;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water; the adding amount of the medicament per cubic meter of underground water is 166g, and the medicament comprises the following raw materials, by weight, 150 parts of lime water, 15 parts of polyacrylamide and 1 part of microbial flocculant;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to obtain primarily filtered underground water; the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water, the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element and can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water, and the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element and can remove microbial bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m;
s4, filtering the primarily filtered underground water obtained in the step S3 through a reverse osmosis membrane to remove dissolved salts, organic matters and the like with the particle size of more than 0.1nm to obtain restored underground water;
s5, conveying the repaired underground water obtained in the step S4 to a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%; wherein the length of the region of the pressurizing pipeline extending into the ground is 90m, the compressive strength is 14MPa, and the wall thickness is 13 mm; high-pressure pump is frequency conversion regulation control's plunger pump, and rated flow is 10m, and the lift is 130 m.
In the repaired groundwater, the removal rate of COD is 90%, the removal rate of TP is 98%, the removal rate of TN is 96% and the removal rate of heavy metals is 91%.
Example 5: the method for remedying the polluted groundwater disclosed by the invention is different from the method in the embodiment 1 in that the method comprises the following steps,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to lead the polluted underground water to pass through the self-priming tank and the lift pump in sequence and be conveyed into the neutralization tank after large-grained sandstone is removed by a filter screen of the lift pipeline; wherein the length of the section of the lifting pipeline extending into the ground is 100m, the compressive strength is 10MPa, and the wall thickness is 10 mm; carrying out thin film self-priming canister dry-mass cultivation with effective volume of 0.3m and wall thickness of 0.9 mm; the lift pump is a plunger pump controlled by variable frequency regulation, the rated flow is 12m, and the lift is 150 m;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, stubborn substances in the underground water are flocculated and precipitated, and supernatant is taken to obtain primarily repaired underground water; the dosage of the medicament per cubic meter of underground water is 212g, and the medicament comprises the following raw materials, by weight, 200 parts of lime water, 10 parts of polyacrylamide and 2 parts of a microbial flocculant;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to obtain primarily filtered underground water; the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water, the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element and can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water, and the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element and can remove microbial bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m;
s4, filtering the primarily filtered underground water obtained in the step S3 through a reverse osmosis membrane to remove dissolved salts, organic matters and the like with the particle size of more than 0.1nm to obtain restored underground water;
s5, conveying the repaired underground water obtained in the step S4 to a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the underground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%; wherein the length of the section of the pressurizing pipeline extending into the ground is 100m, the compressive strength is 15MPa, and the wall thickness is 14 mm; high-pressure pump is frequency conversion regulation control's plunger pump, and rated flow is 12m heavy planting, and the lift is 150 m.
In the repaired underground water, the removal rate of COD is 94%, the removal rate of TP is 98%, the removal rate of TN is 98% and the removal rate of heavy metals is 96%.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A method for remediating contaminated groundwater, comprising: comprises the following steps of (a) carrying out,
s1 the self-priming tank utilizes the atmospheric pressure and the pressure difference of the lift pump to enable the polluted underground water to sequentially pass through the lift pipeline, the self-priming tank and the lift pump and be conveyed into the neutralization tank;
the S2 reagent is added from the top of the neutralization tank and is mixed with the polluted underground water obtained in the S1, so that the pH value of the underground water is adjusted, and stubborn substances in the underground water are precipitated to obtain primarily repaired underground water;
s3, filtering the primarily repaired underground water obtained in the step S2 by a multi-stage membrane filtration water purifier to remove small particulate matters with the particle size of more than 0.1 mu m and obtain primarily filtered underground water;
s4 filtering the primarily filtered groundwater obtained in S3 with a reverse osmosis membrane to remove dissolved salts and organic substances of 0.1nm or more, thereby obtaining restored groundwater.
2. A method of remediating contaminated groundwater as claimed in claim 1, wherein: be provided with the filter screen that is used for filtering large granule grit in the promotion pipeline.
3. A method of remediating contaminated groundwater as claimed in claim 1, wherein: in the S1, the length of the region of the lifting pipeline extending into the ground is 50-100m, the compressive strength is 5-10MPa, and the wall thickness is not less than 6 mm; the effective volume of the self-sucking tank is 0.2-0.3m in thin wall thickness not less than 0.5 mm; the lift pump is a plunger pump with variable-frequency regulation control, the rated flow is 5-12m in weight, and the lift is 100-150m in weight.
4. A method of remediating contaminated groundwater as claimed in claim 1, wherein: in the S2, the dosage of the medicament per cubic meter of underground water is 21-233 g.
5. A method of remediating contaminated groundwater as claimed in claim 1, wherein: in the S2, the medicament comprises the following raw materials, by weight, 10-200 parts of a pH regulator, 10-30 parts of a chemical flocculant and 1-3 parts of a microbial flocculant.
6. The method for remediating contaminated groundwater according to claim 5, wherein: the pH regulator is lime water, and the chemical flocculant is polyacrylamide.
7. A method of remediating contaminated groundwater as claimed in claim 1, wherein: in the S3, the first stage of the multi-stage membrane filtration water purifier is a pp cotton filter element, and can remove silt, rust, solid pollutants and the like with the particle size of more than 1 mu m in underground water; the second stage of the multi-stage membrane filtration water purifier is an activated carbon filter element which can adsorb heterochrosis, peculiar smell, chlorine and other harmful substances in water; the third stage of the multi-stage membrane filtration water purifier is a fine pp filter element, and can remove microorganisms, bacteria, chemical pollution and heavy metals with the particle size of more than 0.1 mu m.
8. A method of remediating contaminated groundwater as claimed in any one of claims 1 to 7, wherein: and the method further comprises the following steps of conveying the repaired underground water obtained in the step S4 into a water outlet tank, starting a high-pressure pump when the water level in the water outlet tank reaches 80% +/-2%, and pumping the underground water to the ground through a pressurizing pipeline until the water level in the water outlet tank reaches 10% +/-2%.
9. A method of remediating contaminated groundwater as claimed in claim 8, wherein: the length of the section of the pressurizing pipeline extending into the ground is 50-100m, the compressive strength is 10-15MPa, and the wall thickness is not less than 10 mm; the high-pressure pump is a plunger pump with variable-frequency regulation control, the rated flow is 5-12m in weight, and the lift is 100-150m in weight.
10. A method of remediating contaminated groundwater as claimed in claim 8, wherein: the lifting pipeline, the self-sucking tank, the lifting pump, the neutralizing tank, the multi-stage membrane filtration water purifier, the reverse osmosis membrane, the water outlet tank, the high-pressure pump and the pressurizing pipeline are all made of stainless steel or alloy materials with corrosion resistance, ageing resistance and high pressure resistance.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416668B1 (en) * | 1999-09-01 | 2002-07-09 | Riad A. Al-Samadi | Water treatment process for membranes |
| CN102557350A (en) * | 2012-01-19 | 2012-07-11 | 合肥德安水处理设备有限公司 | Purification system for micro-polluted raw water and purification method thereof |
| CN203419805U (en) * | 2013-06-28 | 2014-02-05 | 天津邦盛净化设备有限公司 | Purification and water supply device for heavy-metal-polluted underground water |
| CN106277491A (en) * | 2015-05-24 | 2017-01-04 | 陕西理工学院 | Micro-polluted lower water purification system |
| CN210237351U (en) * | 2019-06-25 | 2020-04-03 | 江苏双益给排水有限公司 | Water supply equipment ultraviolet disinfection device |
| CN211035439U (en) * | 2019-09-20 | 2020-07-17 | 淄博兰邦环保科技有限公司 | Two-stage reverse osmosis purified water treatment equipment |
| CN211521873U (en) * | 2019-12-25 | 2020-09-18 | 湖南军信环保股份有限公司 | Treatment system for underground water polluted by landfill leachate |
-
2021
- 2021-05-19 CN CN202110542850.4A patent/CN113105079A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416668B1 (en) * | 1999-09-01 | 2002-07-09 | Riad A. Al-Samadi | Water treatment process for membranes |
| CN102557350A (en) * | 2012-01-19 | 2012-07-11 | 合肥德安水处理设备有限公司 | Purification system for micro-polluted raw water and purification method thereof |
| CN203419805U (en) * | 2013-06-28 | 2014-02-05 | 天津邦盛净化设备有限公司 | Purification and water supply device for heavy-metal-polluted underground water |
| CN106277491A (en) * | 2015-05-24 | 2017-01-04 | 陕西理工学院 | Micro-polluted lower water purification system |
| CN210237351U (en) * | 2019-06-25 | 2020-04-03 | 江苏双益给排水有限公司 | Water supply equipment ultraviolet disinfection device |
| CN211035439U (en) * | 2019-09-20 | 2020-07-17 | 淄博兰邦环保科技有限公司 | Two-stage reverse osmosis purified water treatment equipment |
| CN211521873U (en) * | 2019-12-25 | 2020-09-18 | 湖南军信环保股份有限公司 | Treatment system for underground water polluted by landfill leachate |
Non-Patent Citations (3)
| Title |
|---|
| HANS F. STROO等主编: "《地下水氯代烃污染羽原位修复》", 30 March 2015, 地质出版社 * |
| 丁忠浩编著: "《废水资源化综合利用技术》", 31 January 2007, 国防工业出版社 * |
| 侯晓虹 等: "《水资源利用与水环境保护工程》", 30 April 2015, 中国建材工业出版社 * |
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