Underground water chlorinated organic matter bioremediation device

Abstract

The invention relates to an underground water chlorinated organic matter bioremediation device which comprises a base, a degradation tower and a water pump, the degradation tower is provided with a circulating pipe with the two ends communicated with the interior of the degradation tower, and the water pump is arranged on the circulating pipe and used for enabling underground water in the degradation tower to circularly flow. The degradation tower is provided with a feed hopper for adding an aerobic microbial agent and a drain pipe for discharging treated underground water, the upper end of the degradation tower is provided with an exhaust pipe, the circulating pipe is provided with a sealing shell, and the interior of the sealing shell is rotatably connected with water wheel blades; the water wheel blades are coaxially provided with a rotary disc located in the base. According to the invention, gas and liquid are in full contact with each other, so that gas products such as free chlorine, CO and CO2 in underground water penetrate through a gas-liquid interface and are discharged from the exhaust pipe, oxygen is supplied for aeration of the underground water, the dissolved oxygen content in the underground water is increased, the biological activity of aerobic bacteria is further improved, and the degradation performance of the aerobic bacteria on chloro compounds is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to a device for bioremediation of chlorinated organic matter in groundwater. Background Art

[0002] Chlorinated organic compounds refer to organic substances centered on chlorine atoms, including organochlorine compounds and non-chlorinated organic compounds. Chlorinated organic compounds are an important class of refractory organic compounds with great hazard. Almost all chlorinated organic compounds are toxic, and many of them are considered to have "carcinogenic, teratogenic, and mutagenic" effects. At the same time, because many chlorinated organic compounds are highly volatile and lipid-soluble, they are easily absorbed by the skin, mucous membranes, etc., causing serious damage to the human body. Due to its wide variety and important chemical raw materials, intermediates and organic solvents, it is widely used in chemical, pharmaceutical, pesticide, leather and other industries. Chlorinated organic compounds enter the environment through volatilization, container leakage, wastewater discharge, pesticide use and combustion of chlorine-containing organic products, seriously polluting the atmosphere, soil, groundwater and surface water. In addition, the method of using chlorine as a drinking water disinfectant, which is now widely used, will also produce toxic chlorinated organic compounds. The presence of chlorinated organic compounds has been detected in drinking water in some cities in my country. On the other hand, most chlorinated organic compounds are artificially synthesized compounds with relatively stable chemical properties. The presence of chlorine atoms in them is toxic to microorganisms, so they degrade slowly in nature and have a long environmental hazard period.

[0003] At present, the main remediation methods for chlorine compound pollution include high-temperature incineration, physical methods, and chemical oxidation-reduction methods. However, these technologies have problems such as producing toxic by-products, incomplete degradation, and high costs. Their economic and environmental benefits do not conform to the advocacy of "green production."

[0004] Microbial remediation technology mainly uses the metabolic activities of microorganisms to convert pollutants into low-toxic or non-toxic substances using pollutants as energy sources. In microbial remediation technology, microorganisms achieve the purpose of pollution degradation by using target pollutants as carbon sources and energy sources. For example, under aerobic conditions, many chlorinated aliphatic compounds (such as trichloroethylene) and some aromatic chlorinated compounds (such as polychlorinated biphenyls, PCBS) can be metabolized and degraded by certain aerobic bacteria to produce dichloroacetic acid, aldehyde acetic acid and a carbon atom product (CO, HCOOH), which is further oxidized to CO2. At the same time, aerobic microorganisms also produce CO2 during aerobic respiration. These gaseous products such as CO and CO2 cannot be discharged from groundwater in time, which will reduce the dissolved oxygen content in groundwater, thereby reducing the biological activity of aerobic bacteria and affecting the degradation performance of aerobic bacteria on chlorinated substances. Summary of the invention

[0005] The embodiment of the present invention provides a groundwater chlorinated organic matter bioremediation device, which can solve the problem in the prior art that gas products such as CO and CO2 produced by aerobic microorganisms in the process of degrading chlorinated substances cannot be discharged from the groundwater in time, which will reduce the dissolved oxygen content in the groundwater, thereby reducing the biological activity of aerobic bacteria and affecting the degradation performance of aerobic bacteria on chlorinated substances.

[0006] In order to solve the above technical problems, the present invention adopts the following technical scheme: a groundwater chlorinated organic matter bioremediation device, comprising a base, a degradation tower and a water pump, the degradation tower is provided with a circulation pipe whose two ends are connected to the inside of the degradation tower, the water pump is arranged on the circulation pipe, and is used to circulate the groundwater in the degradation tower, the degradation tower is provided with a feed hopper for adding aerobic microbial agents and a drainage pipe for discharging the groundwater after treatment, the upper end of the degradation tower is provided with an exhaust pipe, the circulation pipe is provided with a sealed shell, the inside of the sealed shell is rotatably connected with a water wheel blade, the water wheel blade is coaxially provided with a turntable located inside the base, the turntable is eccentrically provided with a cylindrical pin, the cylindrical pin is rotatably connected with a connecting rod, the inside of the base is provided with a piston cylinder, the inside of the piston cylinder is sealingly and slidably connected with a piston, the piston is provided with a piston rod hinged with the connecting rod, and the piston cylinder is provided with an outlet pipe connected with the inside of the degradation tower and an intake pipe connected with the external atmosphere.

[0007] Preferably, the degradation tower is internally rotatably connected to a rotating shaft, the rotating shaft is provided with a plurality of stirring blades, the water wheel blades are coaxially provided with a driving pulley located inside the base, the lower end of the rotating shaft extends into the interior of the base and is provided with a driven pulley, and a belt is connected for transmission between the driving pulley and the driven pulley.

[0008] Preferably, the rotating shaft and the stirring blades are both hollow structures, an air flow channel connecting the interiors of the two is opened between the rotating shaft and the stirring blades, aeration holes connected to the interior of the stirring blades are arranged on the surface of the stirring blades, and the air outlet pipe is sealed and rotatably connected to the lower end of the rotating shaft.

[0009] Preferably, a packing layer located above the feed hopper is provided inside the degradation tower, one end of the circulation pipe is located above the packing layer, and the inside of the packing layer is filled with lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber.

[0010] Preferably, a spray pipe is provided at one end of the circulation pipe located above the packing layer, and a plurality of nozzles with water outlet directions facing downwards are evenly provided on the spray pipe.

[0011] Preferably, the upper end of the rotating shaft passes through the packing layer and is provided with negative pressure blades.

[0012] Preferably, a filter is provided on the exhaust pipe.

[0013] Preferably, a water suction pipe for absorbing groundwater is provided at the water inlet end of the water pump, and a shut-off valve is provided on the water suction pipe and the circulation pipe, respectively.

[0014] Compared with the prior art, the present invention adopts the coordinated arrangement of a base, a degradation tower, a water pump, a circulation pipe, a feed hopper, a drainage pipe, an exhaust pipe, a sealed shell, a water wheel blade, a turntable, a cylindrical pin, a connecting rod, a piston cylinder, a piston, a piston rod, an air outlet pipe and an air intake pipe, wherein an aerobic microbial agent is put into the groundwater in the degradation tower through the feed hopper, the water pump continuously extracts the groundwater in the degradation tower through the circulation pipe, so that the groundwater circulates in the degradation tower, and the aerobic microorganisms are uniformly mixed with the groundwater, the flowing groundwater drives the water wheel blade in the sealed shell to rotate, the water wheel blade drives the turntable to rotate, the cylindrical pin on the turntable drives the piston to perform piston movement inside the piston cylinder through the connecting rod and the piston rod, the external air is extracted through the air intake pipe, and is transported to the groundwater through the air outlet pipe, so that the gas and liquid are fully in contact with each other, and the free chlorine and gas products such as CO and CO2 in the groundwater pass through the gas-liquid interface and are discharged from the exhaust pipe, and at the same time, the groundwater is aerated and oxygenated, the dissolved oxygen content in the groundwater is increased, and the biological activity of aerobic bacteria is increased, and the degradation performance of aerobic bacteria on chlorinated substances is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the sealing housing structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating shaft and the stirring blade of the present invention;

[0018] Figure 4 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 5 This is a schematic diagram of the structure of the spray pipe of the present invention when viewed from above;

[0020] Figure 6 It is a schematic diagram of the main structure of the present invention.

[0021] In the figure: 1. degradation tower; 2. water pump; 3. circulation pipe; 4. packing layer; 5. feed hopper; 6. drain pipe; 7. exhaust pipe; 8. sealing shell; 9. water wheel blade; 10. base; 11. turntable; 12. cylindrical pin; 13. connecting rod; 14. piston cylinder; 15. piston; 16. piston rod; 17. outlet pipe; 18. suction pipe; 19. rotating shaft; 20. stirring blade; 21. driving pulley; 22. driven pulley; 23. belt; 24. air flow channel; 25. aeration hole; 26. spray pipe; 27. nozzle; 28. negative pressure blade; 29. ​​suction pipe; 30. filter; 31. shut-off valve. DETAILED DESCRIPTION

[0022] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] like Figure 1 to Figure 6 As shown, a groundwater chlorinated organic matter bioremediation device includes a base 10, a degradation tower 1 and a water pump 2. The degradation tower 1 is provided with a circulation pipe 3 whose two ends are connected to the inside of the degradation tower 1. The water pump 2 is arranged on the circulation pipe 3 to circulate the groundwater in the degradation tower 1. The degradation tower 1 is provided with a feed hopper 5 for adding aerobic microbial agents and a drainage pipe 6 for discharging the treated groundwater. The upper end of the degradation tower 1 is provided with an exhaust pipe 7. The circulation pipe 3 is provided with a sealed shell 8. The inside of the sealed shell 8 is rotatably connected with a water wheel blade. The water wheel blade 9 is coaxially provided with a turntable 11 located inside the base 10, a cylindrical pin 12 is eccentrically provided on the turntable 11, and the cylindrical pin 12 is rotatably connected with a connecting rod 13, a piston cylinder 14 is provided inside the base 10, and a piston 15 is sealingly and slidably connected inside the piston cylinder 14, and a piston rod 16 hinged to the connecting rod 13 is provided on the piston 15, an outlet pipe 17 connected to the interior of the degradation tower 1 and an intake pipe 18 connected to the external atmosphere are provided on the piston cylinder 14, and a drain valve for controlling the opening and closing of the drain pipe 6 is provided on the drain pipe 6.

[0024] When in use, the aerobic microbial agent is put into the groundwater in the degradation tower 1 through the feed hopper 5, and the water pump 2 continuously extracts the groundwater in the degradation tower 1 through the circulation pipe 3, so that the groundwater circulates in the degradation tower 1, and the aerobic microorganisms are evenly mixed with the groundwater. The flowing groundwater drives the water wheel blades 9 in the sealing shell 8 to rotate, and the water wheel blades 9 drive the turntable 11 to rotate. The cylindrical pin 12 on the turntable 11 drives the piston 15 to perform piston movement inside the piston cylinder 14 through the connecting rod 13 and the piston rod 16, and the external air is extracted through the suction pipe 18 and transported to the groundwater through the outlet pipe 17, so that the gas and liquid are fully in contact with each other, and the free chlorine and gas products such as CO and CO2 in the groundwater pass through the gas-liquid interface and are discharged from the exhaust pipe 7. At the same time, the groundwater is aerated and oxygenated, the dissolved oxygen content in the groundwater is increased, and then the biological activity of aerobic bacteria is increased, and the degradation performance of aerobic bacteria on chlorinated substances is improved. After the treatment is completed, the groundwater that meets the standards is discharged from the drain pipe 6.

[0025] In order to achieve the purpose of improving the degradation performance of aerobic bacteria on chlorinated substances, preferably, the degradation tower 1 is internally rotatably connected with a rotating shaft 19, on which a plurality of stirring blades 20 are arranged, and the water wheel blades 9 are coaxially provided with a driving pulley 21 located inside the base 10, the lower end of the rotating shaft 19 extends into the interior of the base 10 and is provided with a driven pulley 22, and a belt 23 is connected between the driving pulley 21 and the driven pulley 22 for transmission.

[0026] When in use, the water pump 2 continuously extracts groundwater in the degradation tower 1 through the circulation pipe 3, so that the groundwater circulates in the degradation tower 1, so that the aerobic microorganisms and the groundwater are evenly mixed, and the flowing groundwater drives the water wheel blades 9 in the sealed shell 8 to rotate, and the water wheel blades 9 drive the turntable 11 and the driving pulley 21 to rotate, and the cylindrical pin 12 on the turntable 11 drives the piston 15 to perform piston movement inside the piston cylinder 14 through the connecting rod 13 and the piston rod 16, and the external air is extracted through the suction pipe 18 and transported to the groundwater through the outlet pipe 17. , so that the gas and liquid are fully in contact with each other, and the free chlorine and gas products such as CO and CO2 in the groundwater pass through the gas-liquid interface and are discharged from the exhaust pipe 7, so as to aerate and oxygenate the groundwater and increase the dissolved oxygen content in the groundwater. At the same time, the active pulley 21 drives the driven pulley 22 to rotate through the belt 23, and the driven pulley 22 drives the stirring blade 20 to rotate through the rotating shaft 19, so as to continuously stir the groundwater, so that the dissolved oxygen and aerobic bacteria are evenly distributed in the groundwater, thereby improving the biological activity of aerobic bacteria and improving the degradation performance of aerobic bacteria on chlorinated substances.

[0027] In order to achieve the purpose of improving the degradation performance of aerobic bacteria on chlorinated substances, preferably, the rotating shaft 19 and the stirring blade 20 are both hollow structures, and an air flow channel 24 connecting the interiors of the two is opened between the rotating shaft 19 and the stirring blade 20. The surface of the stirring blade 20 is provided with aeration holes 25 connected to the interior thereof. The air outlet pipe 17 is sealed and rotatably connected to the lower end of the rotating shaft 19. External air enters the interior of the stirring blade 20 through the rotating shaft 19 and is pressurized and ejected from the aeration holes 25 on the surface of the stirring blade 20 to diffuse into a large number of bubbles. These bubbles are in full contact with the groundwater, thereby increasing the contact area between the air and the groundwater, which is beneficial to increasing the dissolved oxygen content in the groundwater, and improving the blowing efficiency of free chlorine and gas products such as CO and CO2, thereby improving the degradation performance of aerobic bacteria on chlorinated substances.

[0028] In order to achieve the purpose of improving the degradation performance of aerobic bacteria on chlorinated substances, preferably, the degradation tower 1 is provided with a packing layer 4 located above the feed hopper 5, one end of the circulation pipe 3 is located above the packing layer 4, the packing layer 4 is filled with lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber, and the end of the circulation pipe 3 located above the packing layer 4 is provided with a spray pipe 26, and the spray pipe 26 is evenly provided with a plurality of nozzles 27 with water outlet directions facing downward. The lightweight balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber in the packing layer 4 are filled with a plurality of nozzles 27 with water outlet directions facing downward. The mass ball has a high porosity, a large specific surface area, and good surface wettability. It provides sufficient contact surface for gas and liquid phases and creates conditions for improving their turbulence, which is beneficial to mass transfer. It can increase the contact surface between the rising gas and the groundwater sprayed from the nozzle 27, so that free chlorine and CO, CO2 and other substances in the groundwater continue to be blown out and finally discharged from the outlet pipe 17, reducing the degradation burden of aerobic bacteria. The groundwater falling from above can also drive the dissolved oxygen to flow back, continuously provide oxygen for aerobic bacteria, and improve the degradation performance of aerobic bacteria on chlorinated substances.

[0029] Preferably, the packing layer 4 can be provided with multiple layers according to the height of the degradation tower 1. The reason is that when the groundwater flows downward along the packing layer 4, it tends to gradually concentrate on the tower wall, so that the liquid flow rate near the tower wall gradually increases. This phenomenon is called wall flow. The wall flow effect causes the gas-liquid two phases to be unevenly distributed in the packing layer 4, thereby reducing the mass transfer efficiency. Therefore, when the packing layer 4 is relatively high, it needs to be segmented, and a redistribution device is provided in the middle. The liquid redistribution device includes two parts: a liquid collector and a liquid redistributor. The groundwater flowing down from the upper packing is collected by the liquid collector and sent to the liquid redistributor. After redistribution, it is sprayed onto the lower packing.

[0030] In order to achieve the purpose of improving the degradation performance of aerobic bacteria on chlorinated substances, preferably, the upper end of the rotating shaft 19 passes through the packing layer 4 and is provided with a negative pressure blade 28. The rotating shaft 19 drives the negative pressure blade 28 to rotate to generate negative pressure, providing negative pressure for extracting the gas in the degradation tower 1, so that free chlorine and CO, CO2 and other substances are discharged in time, thereby reducing the degradation burden of aerobic bacteria and improving the degradation performance of aerobic bacteria on chlorinated substances.

[0031] In order to achieve the purpose of environmental protection, preferably, a filter 30 is provided on the exhaust pipe 7. The filter 30 is a filter filled with activated carbon or macroporous adsorption resin, which can effectively remove chlorinated organic matter in groundwater and effectively prevent chlorinated organic matter from being directly discharged into the atmosphere to cause secondary pollution.

[0032] In order to achieve the purpose of directly extracting groundwater for bioremediation treatment, preferably, the water inlet end of the water pump 2 is provided with a suction pipe 29 for absorbing groundwater, and the suction pipe 29 and the circulation pipe 3 are respectively provided with a shut-off valve 31.

[0033] Compared with the prior art, the present invention is provided with a base 10, a degradation tower 1, a water pump 2, a circulation pipe 3, a feed hopper 5, a drainage pipe 6, an exhaust pipe 7, a sealed housing 8, a water wheel blade 9, a turntable 11, a cylindrical pin 12, a connecting rod 13, a piston cylinder 14, a piston 15, a piston rod 16, an air outlet pipe 17 and an air intake pipe 18. The aerobic microbial agent is put into the groundwater in the degradation tower 1 through the feed hopper 5, and the water pump 2 continuously extracts the groundwater in the degradation tower 1 through the circulation pipe 3, so that the groundwater circulates in the degradation tower 1, so that the aerobic microorganisms and the groundwater are evenly mixed, and the flowing groundwater drives the dense The water wheel blades 9 in the sealing shell 8 rotate, and the water wheel blades 9 drive the turntable 11 to rotate. The cylindrical pin 12 on the turntable 11 drives the piston 15 to perform piston movement inside the piston cylinder 14 through the connecting rod 13 and the piston rod 16, and the external air is extracted through the suction pipe 18 and transported to the groundwater through the outlet pipe 17, so that the gas and liquid are fully in contact with each other, and the free chlorine and gas products such as CO and CO2 in the groundwater pass through the gas-liquid interface and are discharged from the exhaust pipe 7. At the same time, the groundwater is aerated and oxygenated, the dissolved oxygen content in the groundwater is increased, and then the biological activity of aerobic bacteria is increased, and the degradation performance of aerobic bacteria on chlorinated substances is improved.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A groundwater chlorinated organic matter bioremediation device, comprising a base (10), a degradation tower (1) and a water pump (2), characterized in that: The degradation tower (1) is provided with a circulation pipe (3) whose two ends are connected to the interior of the degradation tower (1); the water pump (2) is arranged on the circulation pipe (3) and is used to circulate the groundwater in the degradation tower (1); the degradation tower (1) is provided with a feed hopper (5) for adding aerobic microbial agents and a drainage pipe (6) for discharging the treated groundwater; the upper end of the degradation tower (1) is provided with an exhaust pipe (7); the circulation pipe (3) is provided with a sealed housing (8); the interior of the sealed housing (8) is rotatably connected to a water wheel blade (9); the water wheel blade ( 9) A turntable (11) is coaxially arranged inside the base (10), a cylindrical pin (12) is eccentrically arranged on the turntable (11), and the cylindrical pin (12) is rotatably connected to a connecting rod (13), a piston cylinder (14) is arranged inside the base (10), a piston (15) is sealingly and slidably connected inside the piston cylinder (14), a piston rod (16) hinged to the connecting rod (13) is arranged on the piston (15), and an air outlet pipe (17) connected to the interior of the degradation tower (1) and an air intake pipe (18) connected to the external atmosphere are arranged on the piston cylinder (14).

2. The groundwater chlorinated organic matter bioremediation device according to claim 1, characterized in that: The degradation tower (1) is rotatably connected to a rotating shaft (19), on which a plurality of stirring blades (20) are arranged, and the water wheel blades (9) are coaxially arranged with a driving pulley (21) located inside the base (10), the lower end of the rotating shaft (19) extends into the interior of the base (10) and is provided with a driven pulley (22), and a belt (23) is connected between the driving pulley (21) and the driven pulley (22) for transmission.

3. The groundwater chlorinated organic matter bioremediation device according to claim 2, characterized in that: The rotating shaft (19) and the stirring blade (20) are both hollow structures. An air flow channel (24) is provided between the rotating shaft (19) and the stirring blade (20) to connect the interiors of the two. The surface of the stirring blade (20) is provided with aeration holes (25) connected to the interior thereof. The air outlet pipe (17) is rotatably connected to the lower end of the rotating shaft (19) in a sealed manner.

4. The groundwater chlorinated organic matter bioremediation device according to claim 3, characterized in that: The degradation tower (1) is provided with a packing layer (4) located above the feed hopper (5), one end of the circulation pipe (3) is located above the packing layer (4), and the packing layer (4) is filled with lightweight small balls made of polyethylene, polypropylene, expanded polystyrene or porous rubber.

5. The groundwater chlorinated organic matter bioremediation device according to claim 4, characterized in that: A spray pipe (26) is provided at one end of the circulation pipe (3) located above the packing layer (4), and a plurality of nozzles (27) with water outlets facing downwards are evenly arranged on the spray pipe (26).

6. The groundwater chlorinated organic matter bioremediation device according to claim 5, characterized in that: The upper end of the rotating shaft (19) passes through the packing layer (4) and is provided with a negative pressure blade (28).

7. The groundwater chlorinated organic matter bioremediation device according to claim 6, characterized in that: The exhaust pipe (7) is provided with a filter (30).

8. The groundwater chlorinated organic matter bioremediation device according to claim 1, characterized in that: A water suction pipe (29) for absorbing groundwater is provided at the water inlet end of the water pump (2), and a shutoff valve (31) is provided on the water suction pipe (29) and the circulation pipe (3), respectively.

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