CN114956449A

CN114956449A - Organic pollution groundwater multiphase is taken out and is mentioned microbial remediation automation intelligent device

Info

Publication number: CN114956449A
Application number: CN202210449802.5A
Authority: CN
Inventors: 刘尚; 高卫国
Original assignee: Shanghai Baofa Environmental Science And Technology Co ltd; Baowu Group Environmental Resources Technology Co Ltd
Current assignee: Shanghai Baofa Environmental Science And Technology Co ltd; Baowu Group Environmental Resources Technology Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-08-30

Abstract

The invention relates to the technical field of polluted groundwater remediation, in particular to an automatic intelligent device for multiphase extraction and microbial remediation of organic polluted groundwater, which comprises a multiphase extraction module, a remediation well module and a microbial remediation module. The multiphase extraction module is provided with a gas-water separator, and an input port of the gas-water separator is connected with an output port of the repair well module. The gas-water separator is connected with a wastewater collecting device, a non-aqueous phase collecting device and a tail gas treatment device, and the output end of the tail gas treatment device is provided with a gas sensor. The repair well module comprises a repair well, and a monitoring sensor is arranged in the repair well. The microbial remediation module comprises a medicament preparation tank and an injection device, wherein the medicament preparation tank is communicated with the remediation well through the injection device. The multiphase extraction module and the microorganism restoring module are both connected with a remote time control switch. The device realizes the pumping and injection combination through the cooperation between the modules, and improves the automation and intelligent degree while strengthening the pumping effect.

Description

Organic pollution groundwater multiphase is taken out and is mentioned microbial remediation automation intelligent device

Technical Field

The invention relates to the technical field of polluted underground water remediation, in particular to an automatic intelligent device for multi-phase microbial remediation of organic polluted underground water.

Background

The remediation of polluted groundwater gradually becomes a hotspot and a difficulty in the field of environmental remediation in recent years. Volatile organic compounds, semi-volatile organic compounds or petroleum hydrocarbons are easily polluted in underground water of industrial enterprise plots. The current well-established repair technologies are multiphase extraction (MPE), in-situ chemical oxidation (ISCO), and the like. However, both of these processes have limitations. The extraction process can extract high-concentration pollutants from underground water in the early stage, and the concentration of the pollutants is rapidly reduced. But in the middle and later stages of extraction, the concentration of the pollutants is gradually stabilized and is not reduced any more, even rebounded to some extent. In situ chemical oxidation processes are costly to remediate high concentrations of contaminated groundwater and injection of chemicals (e.g., persulfate) can increase the concentration of sulfate in conventional indicators of groundwater. Therefore, a combined remediation process is needed to address organic pollution in groundwater.

In the existing solution, some processes of multiphase extraction combined with air injection are adopted to inject air into a saturated zone of a water-bearing stratum, so that the air flow of a low-permeability soil layer is promoted, the permeability of a field is improved, and the extraction effect is enhanced. And the underground temperature is increased by a heat strengthening technology, so that the volatilization of organic pollutants is promoted, and the multiphase extraction effect is enhanced.

However, the existing solutions have insufficient automation or modularity of the processes, and cannot be automated or put into operation quickly. Heating devices typically consume more energy, and southern areas have shallow groundwater levels and slow rates of subsurface temperature rise. For a production enterprise, a single extraction process may cause ground settlement, causing property loss, and process control requires a large amount of human resources and labor cost.

Disclosure of Invention

Therefore, in order to solve the technical problems, an intelligent device for multiphase extraction and microbial remediation of organic polluted groundwater, which can be remotely controlled, low-carbon, environment-friendly, modularized and automatically operated, is needed.

An automatic intelligent device for multiphase pumping and microbial remediation of organic polluted underground water comprises a multiphase extraction module, a remediation well module and a microbial remediation module, wherein the multiphase extraction module is provided with a gas-water separator, and an input port of the gas-water separator is connected with an output port of the remediation well module; the gas-water separator is connected with a wastewater collecting device, a non-aqueous phase collecting device and a tail gas treatment device, and the output end of the tail gas treatment device is provided with a gas sensor; the repair well module comprises a repair well, and a monitoring sensor is arranged in the repair well; the microbial remediation module comprises a medicament preparation tank and an injection device, wherein the medicament preparation tank is communicated with the remediation well through the injection device; the multiphase extraction module and the microbial remediation module are both connected with a remote time control switch.

Furthermore, the waste water collection device is connected with a centrifugal pump, a vacuum pump is arranged in the tail gas treatment device, the vacuum pump is electrically connected with the time control switch, the input end of the vacuum pump is connected with the output end of the gas-water separator, and the vacuum pump is used for pumping the tail gas generated in the gas-water separator into the tail gas treatment device.

Furthermore, the tail gas treatment device also comprises a dehumidifier and a plurality of activated carbon tanks, and the output end of the vacuum pump is respectively connected with the dehumidifier and the activated carbon tanks.

Further, the output end of the activated carbon tank is provided with a sensor and a fan, and the sensor and the fan are used for monitoring whether the treated tail gas reaches the standard or not and discharging the treated tail gas.

Further, the sensor adopts a VOCs sensor.

Furthermore, the repair well module comprises an extraction well and an extraction main pipe, wherein an extraction dropper and a sieve pipe are arranged in the extraction well, the output port of the extraction dropper is communicated with the extraction main pipe through a repair well pipeline, and the output port of the extraction main pipe is connected with the input end of the gas-water separator.

Furthermore, an intelligent flowmeter and a pressure gauge are installed in the repair well pipeline.

Furthermore, the extraction well is a UPVC material well.

Furthermore, the input of medicament jar is connected with medicament production system, the bioremediation module still includes the water pitcher, injection device includes diaphragm pump and air compressor machine, the air compressor machine electricity is connected long-range time switch.

Furthermore, the multiphase extraction module and the microbial remediation module are integrated in a single container, and a camera is arranged at the top of the container.

Has the advantages that: (1) the remote time control switch controls the operation of the multiphase extraction module and the bioremediation module, the start-stop and start-stop time can be set remotely, intermittent operation is realized, the automation degree is higher, the intermittent operation can also save electric energy and slow down ground settlement, and long-time duty of personnel is not needed. (2) And the injection device in the microbial remediation module enhances microbial degradation of pollutants through aeration and injection of nutrients and flora without generating secondary pollution. (3) The gas sensor arranged at the output end of the tail gas treatment device can make corresponding prompt when the gas concentration exceeds the relevant standard emission limit value, so that no waste gas pollution is ensured. (4) The repair well module is respectively connected with the multiphase extraction module and the microorganism repair module, has the functions of extraction and injection and provides flexibility. (5) Installing a monitoring sensor in the repair well, and monitoring pH, Dissolved Oxygen (DO) and temperature; when DO is lower than the set minimum value, starting aeration; stopping aeration after the restoration requirement is met; through aeration, favorable groundwater temperature and dissolved oxygen conditions can be created for microbial flora; the nutrient and the microbial flora are prepared in a medicament production system and are transmitted to a polluted area through an injection system; the injection of the liquid medicament can also improve the permeability of soil layers; (6) the modularized construction method can be purchased and installed in advance, so that the construction preparation time is saved; (7) the device is integrated in a standard container, a camera position is reserved at the top of the device, and a construction area is monitored; (8) and the instrument and the sensor are integrally provided with the Internet of things module, and data are transmitted to the cloud in real time for repair decision-making.

Drawings

FIG. 1 is a schematic diagram of the working flow of an automatic intelligent device for multiphase extraction and microbial remediation of organically-polluted groundwater according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the multi-phase extraction module of FIG. 1;

FIG. 3 is a schematic diagram of the microbial remediation module of FIG. 1;

FIG. 4 is a schematic view of the operational flow of the microbial remediation module of FIG. 3;

FIG. 5 is a schematic illustration of the operation of the workover module of FIG. 1;

FIG. 6 is a schematic view of the dispensing system of the medicament canister of FIG. 5;

fig. 7 is a flow chart of the workover module operation of fig. 5.

In the figure: 100. a multiphase extraction module; 110. a gas-water separator; 120. a centrifugal pump; 130. a vacuum pump; 140. a dehumidifier; 150. an activated carbon canister; 200. a microbial remediation module; 210. a diaphragm pump; 220. a medicament preparation tank; 221. a medicine storage tank; 222. a flow pump; 223. a nitrogen tank; 224. a reaction kettle; 225. a high shear mixing device; 230. an air compressor; 240. a water tank; 250. an injection well; 300. a remediation well module; 310. an extraction well; 311. a screen pipe; 312. an extraction dropper; 320. and (4) extracting the header pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in FIG. 1, in one embodiment, the intelligent device for multi-phase extraction and microbial remediation automation of organic contaminated groundwater comprises a multi-phase extraction module 100, a microbial remediation module 200 and a remediation well module 300, wherein the multi-phase extraction module 100 comprises an extraction system and a multi-phase separation system, and an input port of the multi-phase separation system is connected with an output port of the extraction system. The microbial remediation module 200 includes a medicament dispensing system and an infusion system.

As shown in fig. 2, in this embodiment, the repair well module 300 includes an extraction well 310 and an extraction main pipe 320, the extraction well 310 has extraction and injection functions, and is made of UPVC material and is provided with a wellhead and a wellhead, the wellhead is respectively connected with the multiphase extraction module 100 and the microbial repair module 200, and is completely sealed, and the wellhead is provided with an intelligent flow meter and a pressure gauge. In the extraction process, the vacuum degree at the wellhead is controlled to be 25-50 kPa, and the vacuum degree is adjusted according to the thickness of the overburden layer and the bottom surface settlement monitoring condition. A sieve tube 311 and an extraction dropper 312 are arranged in the extraction well 310, the depth of the sieve tube 311 is set according to different project conditions, and the extraction dropper 312 is respectively connected with the multiphase extraction module 100 and the microbial remediation module 200. A monitoring sensor is also arranged in the repair well and used for monitoring pH, Dissolved Oxygen (DO) and temperature; when DO is lower than the set minimum value, starting aeration; stopping aeration after the restoration requirement is met; through aeration, favorable groundwater temperature and dissolved oxygen conditions can be created for microbial flora.

As shown in fig. 3, in the present embodiment, the extraction system is connected to an extraction well 310 in the well repairing module 300, the extraction well 310 is connected to the gas-water separator 110 through an extraction dropper 312, a wastewater collecting device and a non-aqueous phase collecting device are respectively disposed in the gas-water separator 110 to separate a gas phase, an oil phase and an aqueous phase, wherein the wastewater is introduced into a sewer network through a vacuum pump 130, and the floating oil is disposed as hazardous wastewater. And the extraction speed of the vacuum pump 130 is more than or equal to 5L/min, the motor parameter is 380V/50Hz, and the power is 5.0 kW. The gas-water separator 110 is connected to a vacuum pump 130, a dehumidifier 140 is provided at the vacuum pump 130, and the gas generated in the gas-water separator 110 is pumped by the vacuum pump 130 and the moisture remaining in the gas is removed by the dehumidifier 140. In addition, the activated carbon canister 150 is connected to a blower, and the gas treated by the dehumidifier passes through the activated carbon canister 150 to adsorb harmful substances through activated carbon, and discharges the exhaust gas.

As shown in fig. 4, in this embodiment, the vacuum pump is electrically connected to a remote time switch, and the underground organic sewage is extracted by the vacuum pump and separated into wastewater, floating oil and tail gas by three-phase separation. The produced floating oil and waste water are respectively stored and treated by corresponding collecting devices. And the generated tail gas is subjected to harmful substance adsorption by active carbon and then is discharged by a fan after being qualified by tail gas monitoring. The tail gas monitoring department is provided with gas sensor, will automatic alarm when the reading surpasses the setting value after, the suggestion changes the active carbon.

As shown in fig. 5, in the present embodiment, the microbial remediation module 200 includes a diaphragm pump 210, an air compressor 230, and a drug preparation tank 220, wherein the drug preparation tank 220 is connected with a drug preparation system, and the air compressor 230 provides power for the diaphragm pump 210 to pump out and inject the nutrient and microbial flora in the drug preparation tank 220 into an injection well 250. The air compressor 230 can also directly inject air into the injection well 250, and the Dissolved Oxygen (DO) is preferably controlled to be 5-7 mg/L through the monitoring sensor. The injection pressure of a single well is preferably controlled to be 25-50 kPa, and the injection rate is about 2-5L/min. The module for repairing microorganisms 200 further comprises a water tank 240, and the air compressor 230 and the diaphragm pump 210 form an injection system of the module for repairing microorganisms 200, wherein the air compressor 230 provides power for the diaphragm pump 210 to pump out and inject the liquid in the drug preparation tank 220 and the water tank 240 into the injection well 250. The contents of the drug preparation tank 220 and the water tank 240 are injected into the corresponding injection well 250 via the injection system. The multi-phase extraction module 100 and the microbial remediation module 200 are integrated and integrated into a single container having dimensions of 5898mm (length) x2352mm (width) x2393mm (height).

As shown in fig. 6, in the present embodiment, a drug storage tank 221 is provided in the drug dispensing system, an output port of the drug storage tank 221 is connected to an input port of the reaction kettle 224 through a pipe, and a flow pump 222 is provided in the pipe. A nitrogen gas bottle 223 is further arranged, and the output end of the nitrogen gas bottle 223 is communicated with the input end of the reaction kettle 224 through a pipeline. Be provided with high shear mixing device 225 in reation kettle 224, reation kettle 224's bottom has seted up the delivery outlet, and this delivery outlet passes through the input intercommunication of pipeline with medicament preparation jar 220.

As shown in fig. 7, in this embodiment, the substance generated in the drug preparation tank in the microbial module is injected into the repair well module through the diaphragm pump, the diaphragm pump is connected with the air compressor to form an injection system, and in addition, the air compressor is electrically connected with a remote time control switch.

According to the automatic intelligent device for multiphase extraction and microbial remediation of organic polluted underground water, for an in-production enterprise, after three modules are connected on site, the multiphase extraction module is started in the early stage of engineering, the running time is preset through a time control switch, and the multiphase extraction module is preferably set to run for 1 time within 2 hours, and each time is not more than 10 minutes. The polluted underground water is extracted on the ground to realize three-phase separation, the waste gas is adsorbed by active carbon and then is discharged after reaching standards, the floating oil is treated as dangerous waste, and the waste water is discharged into a sewage pipe network of a factory area. And starting the microorganism module at the middle and later stages of the engineering, and starting or stopping aeration according to the DO value of the monitoring sensor. The nutrient solution is prepared on site and injected into the remediation well together with the microbial flora. The instrument of well repairing module can read the operation parameter, transmits to the high in the clouds in real time for judge the operating condition. In the tail stage of extraction, air and nutrient substances (liquid mixed solution) are injected to promote the microbial degradation of pollutants, so that secondary pollution is not generated. And the extraction effect is enhanced through extraction and injection combination. The running time is set through a remote time control switch, on one hand, the amount of underground water extraction is controlled through intermittent extraction, and ground settlement is prevented; on the other hand, the automatic control is realized, the long-term on-duty of personnel is not needed, and the labor cost is greatly reduced. In addition, the repair system is modularized, can be purchased and installed in advance, and can be rapidly put into field use. The well repairing module has the functions of extraction and injection, and the flexibility of repairing treatment is increased.

In addition, the mass concentration of the dissolved oxygen in the underground water can reach 8-12 mg/L by injecting air at normal temperature, and the method is the most economical mode. In addition to the contaminants as carbon substrates, the microorganisms also require other nutrients such as N, P, S. Generally, in-situ bioremediation of groundwater is a treatment technology with relatively low cost, and after implementation, the activity of the field degradation biological group can be maintained for years, so that bioremediation has a continuous effect.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The automatic intelligent device for multiphase pumping and microbial remediation of organic polluted underground water is characterized by comprising a multiphase extraction module, a remediation well module and a microbial remediation module, wherein the multiphase extraction module is provided with a gas-water separator, and an input port of the gas-water separator is connected with an output port of the remediation well module; the gas-water separator is connected with a wastewater collecting device, a non-aqueous phase collecting device and a tail gas treatment device, and the output end of the tail gas treatment device is provided with a gas sensor; the repair well module comprises a repair well, and a monitoring sensor is arranged in the repair well; the microbial remediation module comprises a medicament preparation tank and an injection device, wherein the medicament preparation tank is communicated with the remediation well through the injection device; the multiphase extraction module and the microbial remediation module are both connected with a remote time control switch.

2. The organic polluted groundwater multiphase pumping microorganism remediation automation intelligent device as claimed in claim 1, wherein the wastewater collection device is connected with a centrifugal pump, a vacuum pump is arranged in the tail gas treatment device, the vacuum pump is electrically connected with the time control switch, and an input end of the vacuum pump is connected with an output end of the gas-water separator, and is used for pumping tail gas generated in the gas-water separator into the tail gas treatment device.

3. The intelligent multiphase extraction microbial remediation device of claim 2, wherein the tail gas treatment device further comprises a dehumidifier and a plurality of activated carbon tanks, and the output end of the vacuum pump is connected with the dehumidifier and the activated carbon tanks respectively.

4. The multiphase extraction microorganism remediation automation intelligent device of claim 3, wherein an output end of the activated carbon tank is provided with a sensor and a fan for monitoring whether the treated tail gas reaches the standard and discharging the treated tail gas.

5. The intelligent, multiphase, extraction and microbial remediation device of claim 4, wherein said sensor is a VOCs sensor.

6. The multiphase extraction microorganism remediation automation intelligent device of claim 1, wherein the remediation well module comprises an extraction well and an extraction main pipe, an extraction dropper and a sieve pipe are arranged in the extraction well, an output port of the extraction dropper is communicated with the extraction main pipe through a remediation well pipeline, and an output port of the extraction main pipe is connected with an input end of the gas-water separator.

7. The organic polluted groundwater microbial remediation automation intelligent device as claimed in claim 6, wherein an intelligent flowmeter and a pressure gauge are installed in the remediation well pipeline.

8. The multiphase extraction microbial remediation automation intelligence device of claim 6, wherein the extraction well is a UPVC material well.

9. The organic polluted groundwater multiphase extraction-type microorganism remediation automation intelligent device as claimed in claim 1, wherein an input end of the reagent tank is connected with a reagent production system, the bioremediation module further comprises a water tank, the injection device comprises a diaphragm pump and an air compressor, and the air compressor is electrically connected with the remote time control switch.

10. The intelligent device for multiphase extraction and microbial remediation of organically-polluted groundwater according to any one of claims 1 to 9, wherein the multiphase extraction module and the microbial remediation module are integrated and integrated in a separate container, and a camera is arranged on the top of the container.