Microbial remediation device for petroleum hydrocarbon polluted land parcels

Abstract

The utility model discloses a microbial remediation device for a petroleum hydrocarbon polluted land parcel, which comprises a remediation well, an aeration pipe, an injection pipe and an extraction pipe are arranged in the remediation well; the input end of the temporary storage tank is respectively connected with the biological agent tank and the biological surfactant tank, and the output end of the temporary storage tank is connected with the injection pipe; the input end of the raw water tank is connected with the extraction pipe, and the output end of the raw water tank is connected with the biological reaction tank; and the air blower is connected with the aeration pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental restoration, in particular to a microbial restoration device for petroleum hydrocarbon-contaminated land. Background Art

[0002] At present, the main treatment technology used for petroleum hydrocarbon contaminated land is extraction, and the addition of large amounts of chemical agents will have a significant impact on the physical and chemical properties of the soil and groundwater.

[0003] Therefore, there is an urgent need to propose a remediation device for repairing petroleum hydrocarbon-contaminated land to avoid the impact of chemical agents on the physical and chemical properties of soil and groundwater. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a microbial remediation device for petroleum hydrocarbon contaminated land.

[0005] To achieve the above technical objectives, the technical solution of the present invention is a microbial remediation device for petroleum hydrocarbon contaminated land, the device comprising:

[0006] A repair well, wherein the repair well is provided with an aeration pipe, an injection pipe, and an extraction pipe;

[0007] A temporary storage tank, wherein the input end of the temporary storage tank is connected to the biological inoculant tank and the biological surfactant tank respectively, and the output end of the temporary storage tank is connected to the injection pipe;

[0008] A raw water tank, wherein the input end of the raw water tank is connected to the extraction pipe, and the output end of the raw water tank is connected to the biological reaction tank;

[0009] A blower is connected to the aeration pipe.

[0010] Furthermore, the upper half of the aeration pipe is configured as a solid pipe, and the lower half of the aeration pipe is configured as a corrugated pipe.

[0011] Furthermore, a dissolved oxygen probe is installed at the bottom of the aeration tube.

[0012] Furthermore, the injection pipe is a bellows.

[0013] Furthermore, the extraction pipe is a solid pipe; a submersible pump is provided at the bottom of the extraction pipe.

[0014] Furthermore, the bioreactor tank is filled with a stable porous carrier, and a biofilm is attached to the stable porous carrier.

[0015] Furthermore, a Z-shaped baffle is provided in the biological reaction tank.

[0016] Furthermore, the device further comprises:

[0017] A petroleum hydrocarbon online monitoring system is installed at the outlet of the biological reactor;

[0018] When the petroleum hydrocarbon concentration in groundwater detected by the petroleum hydrocarbon online monitoring system is higher than the remediation target value, the groundwater is circulated to the raw water tank through the circulation pipeline.

[0019] The beneficial effects of the present invention are as follows: the present invention provides a microbial remediation device for petroleum hydrocarbon contaminated land, which can minimize the impact of the remediation process on the soil and groundwater of the land through microbial remediation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a schematic diagram of a microbial remediation device for petroleum hydrocarbon contaminated land provided by the utility model;

[0022] In the figure, 1-repair well, 101-aeration pipe, 102-dissolved oxygen probe, 103-injection pipe, 104-extraction pipe, 105-submersible pump, 2-temporary storage tank, 3-biological agent tank, 4-biological surfactant tank, 5-petroleum hydrocarbon online monitoring system, 6-biological reaction tank, 7-raw water tank, 8-blower. DETAILED DESCRIPTION

[0023] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0024] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. As used in this utility model and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] It should be understood that although the terms first, second, third, etc. may be used in this utility model to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, first information can also be referred to as second information without departing from the scope of this utility model, and similarly, second information can also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when...", "when...", or "in response to determining."

[0026] The present invention will be described in detail below with reference to the accompanying drawings. Unless there is any conflict, the features of the following embodiments and implementations may be combined with each other.

[0027] like Figure 1 As shown, the embodiment of the present invention provides a microbial remediation device for petroleum hydrocarbon contaminated land, the device comprising:

[0028] A repair well 1 is provided with an aeration pipe 101, an injection pipe 103, and an extraction pipe 104. The upper half of the aeration pipe 101 is a solid pipe, and the lower half is a bellows pipe. A dissolved oxygen probe 102 is installed at the bottom of the aeration pipe 101. When the dissolved oxygen content detected by the dissolved oxygen probe 102 is lower than the oxygen content required for the survival of the biological agent, the blower 8 starts to inject oxygen. The injection pipe 103 is a bellows pipe to maximize the efficiency of the biological agent injection. The extraction pipe 104 is a solid pipe. A submersible pump 105 is installed at the bottom of the extraction pipe 104 for pumping groundwater into the raw water tank 7 for temporary storage.

[0029] Furthermore, the construction process of the remediation well 1 includes: building a cement platform above the ground, filling 1~2 m thick clay below the groundwater to block pollutants above the ground; filling 4# processed sand 1~2 m below the ground to ensure the exchange efficiency of groundwater in the remediation well.

[0030] The temporary storage tank 2 has its input end connected to the biological agent tank 3 and the biological surfactant tank 4 respectively, and its output end connected to the injection pipe 103 .

[0031] Raw water tank 7, the input end of which is connected to extraction tube 104, and the output end of which is connected to bioreactor 6. Bioreactor 6 is a three-dimensional structure filled with a stable porous carrier with a biofilm attached to it. Groundwater is injected from the bottom of bioreactor 6. Z-shaped baffles are also installed within bioreactor 6 to increase the migration path of contaminated water and thereby increase the contact area between contaminated groundwater and bioreactor 6.

[0032] The blower 8 is connected to the aeration pipe 101 .

[0033] Furthermore, the device further comprises:

[0034] A petroleum hydrocarbon online monitoring system 5 is provided at the outlet of the biological reaction tank 6;

[0035] When the petroleum hydrocarbon concentration in the groundwater detected by the petroleum hydrocarbon online monitoring system 5 is higher than the remediation target value, the groundwater is circulated to the raw water tank 7 through the circulation pipeline.

[0036] Next, the working process of the microbial remediation device for petroleum hydrocarbon contaminated land provided by the utility model is described in detail:

[0037] In the area of ​​groundwater pollution to be treated, several remediation wells 1 are constructed according to a preset density;

[0038] The biological agent and biological surfactant stored in the biological agent tank 3 and the biological surfactant tank 4 are injected into the temporary storage tank 2 according to a certain ratio, and then the mixed solution in the temporary storage tank 2 is injected into the repair 1. During the injection process, the blower 8 starts aeration synchronously;

[0039] Then, the groundwater extracted from the repaired well 1 is temporarily stored in the raw water tank 7 and then injected into the bottom of the biological reaction tank 6. After the reaction is completed, the groundwater enters the petroleum hydrocarbon online monitoring system 5, and enters the temporary storage tank 2 after being treated to meet the standards. The groundwater that does not meet the standards is circulated to the raw water tank 7 for circulation treatment.

[0040] The above embodiments are intended only to illustrate the design concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The scope of protection of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications based on the principles and design concepts disclosed in the present invention are within the scope of protection of the present invention.

Claims

1. A microbial remediation device for petroleum hydrocarbon contaminated land, characterized in that: The device comprises: A repair well (1), wherein the repair well (1) is provided with an aeration pipe (101), an injection pipe (103), and an extraction pipe (104); A temporary storage tank (2), wherein the input end of the temporary storage tank (2) is connected to the biological agent tank (3) and the biological surfactant tank (4), respectively, and the output end of the temporary storage tank (2) is connected to the injection pipe (103); A raw water tank (7), wherein the input end of the raw water tank (7) is connected to the extraction pipe (104), and the output end of the raw water tank (7) is connected to the biological reaction tank (6); A blower (8), the blower (8) being connected to the aeration pipe (101); a petroleum hydrocarbon online monitoring system (5) provided at the outlet of the biological reactor (6); When the petroleum hydrocarbon concentration in the groundwater detected by the petroleum hydrocarbon online monitoring system (5) is higher than the remediation target value, the groundwater is circulated to the raw water tank (7) through the circulation pipeline.

2. The microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1 is characterized in that: The upper half of the aeration pipe (101) is configured as a solid pipe, and the lower half of the aeration pipe (101) is configured as a corrugated pipe.

3. A microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1 or 2, characterized in that: A dissolved oxygen probe (102) is installed at the bottom of the aeration tube (101).

4. The microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1, characterized in that: The injection pipe (103) is a bellows.

5. The microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1 is characterized in that: The extraction pipe (104) is a solid pipe; a submersible pump (105) is provided at the bottom of the extraction pipe (104).

6. The microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1 is characterized in that: The biological reaction tank (6) is filled with a stable porous carrier, and a biofilm is attached to the stable porous carrier.

7. A microbial remediation device for petroleum hydrocarbon contaminated land according to claim 1 or 6, characterized in that: A Z-shaped baffle is provided in the biological reaction tank (6).

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