Micro-power integrated landfill leachate harmless treatment device

Abstract

The utility model discloses a micro-power integrated landfill leachate innocent treatment device, which relates to the technical field of sewage treatment and comprises a pretreatment tank, a sequencing batch reaction tank and a micro-aerobic membrane bioreactor which are sequentially connected according to a sewage treatment sequence, the sequencing batch reaction tank comprises a tank body, a first partition wall and a second partition wall are arranged in the tank body to sequentially divide an inner cavity of the tank body into a decoloring area, a coagulation assisting area and a flocculation area, and overflow ports are formed in the tops of the first partition wall and the second partition wall; the micro-aerobic membrane bioreactor is composed of an anaerobic tank and an aerobic tank, an aeration device is arranged at the bottom in the aerobic tank, a membrane assembly is arranged in the aerobic tank and comprises a plurality of membranes vertically arranged in the middle in the aerobic tank, a water outlet is formed in the top end of each membrane, and the water outlets are converged to a header pipe through pipelines. The water pump C is connected into the clean water tank. The device disclosed by the utility model has the advantages of low energy consumption, good treatment effect, strong membrane separation capability, good membrane pollution resistance and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to sewage treatment technical field, especially to a kind of micro power integrated waste leachate harmless treatment device. BACKGROUND

[0002] The composition of waste leachate is extremely complex, and it is a kind of toxic and harmful high-concentration organic wastewater. It has the characteristics of complex pollutant composition, large water quality fluctuation, high concentration of organic pollutants, high concentration of ammonia nitrogen, deep color, strong odor, high concentration of heavy metal ions and high salt content, strong toxicity, etc. If it is not disposed reasonably, it will cause serious pollution to water environment, atmospheric environment and soil environment, and harm human health.

[0003] MBR process is a new water treatment technology combined by activated sludge process and membrane separation technology. It can play the dual effects of membrane separation technology and biological treatment, has the advantages of good solid-liquid separation effect, good effluent water quality, flexible and stable operation control, strong resistance to water quality fluctuation, small occupation area, easy upgrading and reconstruction, etc. In recent years, it has been more and more widely used in waste leachate. However, there are problems such as high energy consumption in the operation process, membrane pollution restricting membrane separation technology, etc., which restrict its further promotion. SUMMARY

[0004] The present application aims to overcome the problems in the prior art that the colloidal particles, organic matter and suspended solids in the sewage are easy to form colloids or block the membrane pores, thereby affecting the retention rate and pure water flux of the membrane, causing membrane pollution, and the energy consumption of the prior art for treating waste leachate is high. The present application provides a micro power integrated waste leachate harmless treatment device, which has the advantages of low energy consumption, good treatment effect, strong membrane separation capacity and good membrane anti-pollution property.

[0005] To achieve the above-mentioned application purposes, the technical scheme adopted by the present application is as follows:

[0006] The utility model relates to a kind of micro power integrated harmless treatment device of landfill leachate, it is characterized in that, including pretreatment pool, sequencing batch reactor and micro-oxygen membrane bioreactor connected in order according to sewage treatment sequence;The sequencing batch reactor includes pool body, the first partition wall and the second partition wall are equipped in the pool body, and the inner chamber of pool body is separated into decoloration zone, coagulation aid zone and flocculation zone in sequence, the top of the first partition wall and the second partition wall is equipped with overflow port, and the overflow port of the second partition wall is lower than the overflow port of the first partition wall, to make decoloration zone and coagulation aid zone all overflow from top water to the next water treatment zone;The micro-oxygen membrane bioreactor is composed of anaerobic tank and aerobic tank, the flocculation zone effluent is connected with anaerobic tank by water pump A, the anaerobic tank effluent is connected with aerobic tank by water pump B, the bottom of the aerobic tank is provided with aeration device, the aeration device is connected with aeration fan, the aerobic tank is provided with membrane assembly, the membrane assembly includes a plurality of membrane sheets vertically arranged in the middle part of aerobic tank, each membrane sheet is fixed by fixing rod, the top of each membrane sheet is provided with water outlet, each water outlet is respectively collected into main pipe by pipeline, and is connected into clean water tank by water pump C.

[0007] Further improvement of the utility model lies in, the pretreatment pool includes grid well, oil separation tank and adjusting tank connected in order according to sewage treatment sequence, the grid well effluent is connected with oil separation tank by water pump D, the oil separation tank effluent is connected with adjusting tank by water pump E, the adjusting tank effluent is connected with decoloration zone by water pump F, grid well is used to accept landfill leachate sewage, intercepts floating material and large particle impurities in sewage, oil separation tank is used for oil-water separation, removes grease in sewage, adjusting tank is used for adjusting water quantity and water quality, guarantees subsequent processing stable operation.

[0008] Further improvement of the utility model lies in, the anaerobic tank is the closed pool body structure, the anaerobic tank is provided with stirring device, and sludge anaerobic digestion efficiency in anaerobic tank is improved by stirring.

[0009] Further improvement of the utility model lies in, the membrane assembly is provided with square shell periphery, the square shell is composed of square frame and filter plate arranged on each side of square frame, the square shell is fixed by fixing rod, plays the protection effect to membrane assembly, prevents water flow disturbance impact, simultaneously prevents sludge in aerobic tank from entering membrane sheet and causes pollution.

[0010] Further improvement of the utility model lies in, the membrane sheet is TiO2 / g-C3N4 / PVDF modified membrane, the membrane sheet has higher anti-pollution, and can further degrade organic matter.

[0011] A further improvement of this utility model is that it also includes a hydrogen peroxide dosing device, an activated carbon dosing device, a PAM dosing device, a PAC dosing device, and a screw press sludge dewatering machine. The hydrogen peroxide dosing device and the activated carbon dosing device are connected to the decolorization zone via dosing pipes. The PAM dosing device is connected to the coagulation aid zone and the screw press sludge dewatering machine via dosing pipes. The PAC dosing device is connected to the flocculation zone via dosing pipes. The sludge discharge ports at the bottom of the decolorization zone, the coagulation aid zone, and the flocculation zone are all connected to the screw press sludge dewatering machine via sludge discharge pumps.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This utility model achieves the treatment of impurities in wastewater under low energy consumption conditions through a pretreatment tank and a sequencing batch reactor, ensuring the efficient and stable operation of the subsequent micro-oxygen membrane bioreactor and delaying membrane fouling. The sequencing batch reactor adopts a gradient overflow structure, which does not require a power system, is easy to maintain, and effectively reduces energy consumption and cost.

[0014] 2. This utility model achieves efficient synergy between a sequencing batch reactor (SBR) and a micro-oxygen membrane bioreactor. The SBR primarily removes pollutants such as color and particulate matter from the leachate. In the anaerobic tank of the micro-oxygen membrane bioreactor, large, recalcitrant organic molecules are degraded into smaller molecules, releasing phosphorus. Meanwhile, in the aerobic tank, microorganisms in the activated sludge come into full contact with the small organic molecules, undergoing metabolism through oxidation and decomposition to maintain growth and reproduction, while simultaneously degrading organic matter. Through membrane separation, nitrifying bacteria are retained, allowing the nitrification reaction to proceed smoothly and effectively removing pollutants such as ammonia nitrogen.

[0015] 3. This utility model enables on-site resource utilization after complete purification of leachate, effectively overcoming the problems of high cost, high energy consumption, and large carbon emissions caused by pipeline laying and transportation in sewage collection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the diagram: 1. Pretreatment tank; 2. Sequencing batch reactor; 3. Micro-oxygen membrane bioreactor; 4. Tank body; 5. First partition wall; 6. Second partition wall; 7. Decolorization zone; 8. Coagulation aid zone; 9. Flocculation zone; 10. Overflow outlet; 11. Anaerobic tank; 12. Aerobic tank; 13. Pump A; 14. Aeration device; 15. Aeration blower; 16. Membrane module; 17. Membrane sheet; 18. Fixing rod; 19. Outlet; 20. Pump C; 21. Clear water tank; 22. Grille well; 23. Oil separator; 24. Equalization tank; 25. Pump D; 26. Pump E; 27. Pump F; 28. Stirring device; 29. ​​Square shell; 30. Square frame; 31. Filter plate; 32. Hydrogen peroxide dosing device; 33. Activated carbon dosing device; 34. PAM dosing device; 35. PAC dosing device; 36. Screw press sludge dewatering machine; 37. Sludge discharge pump. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be further described in detail below by specific examples and in combination with the drawings:

[0019] A micro-power integrated harmless treatment device for landfill leachate, comprising a pretreatment tank 1, a sequencing batch reactor 2 and a micro-oxygen membrane bioreactor 3 connected in sequence according to the order of sewage treatment; the sequencing batch reactor 2 comprises a tank body 4, a first partition wall 5 and a second partition wall 6 are arranged in the tank body 4 to sequentially divide the inner cavity of the tank body 4 into a decolorizing zone 7, a coagulation aid zone 8 and a flocculation zone 9, overflow ports 10 are arranged at the top of the first partition wall 5 and the second partition wall 6, and the overflow port 10 of the second partition wall 6 is lower than the overflow port 10 of the first partition wall 5, so that the decolorizing zone 7 and the coagulation aid zone 8 both overflow from the top to the subsequent water treatment zone; the micro-oxygen membrane bioreactor 3 is composed of an anaerobic tank 11 and an aerobic tank 12, the effluent of the flocculation zone 9 is connected with the anaerobic tank 11 through a water pump A 13, the effluent of the anaerobic tank 11 is connected with the aerobic tank 12 through a water pump B 14, an aeration device 15 is arranged at the bottom of the aerobic tank 12, the aeration device 15 is connected with an aeration fan 16, a membrane assembly 17 is arranged in the aerobic tank 12, the membrane assembly 17 comprises a plurality of membrane sheets 18 arranged in a vertical manner in the middle part of the aerobic tank 12, each membrane sheet 18 is fixed through a fixing rod 19, and each membrane sheet 18 is provided with an effluent port 20 at the top end, each effluent port 20 is collected into a main pipe through a pipeline and is connected into a clean water tank 22 through a water pump C 21.

[0020] In this embodiment, the pretreatment tank 1 comprises a grid well 23, an oil separation tank 24 and an adjusting tank 25 connected in sequence according to the order of sewage treatment, the effluent of the grid well 23 is connected with the oil separation tank 24 through a water pump D 26, the effluent of the oil separation tank 24 is connected with the adjusting tank 25 through a water pump E 27, the effluent of the adjusting tank 25 is connected with the decolorizing zone 7 through a water pump F 28, the grid well 23 is used for receiving landfill leachate sewage, intercepting floating objects and large-particle impurities in the sewage, the oil separation tank 24 is used for oil-water separation and removing grease in the sewage, and the adjusting tank 25 is used for adjusting water quantity and water quality to ensure stable operation of subsequent treatment.

[0021] In this embodiment, the anaerobic tank 11 is a closed tank body structure, and a stirring device 29 is arranged in the anaerobic tank 11 to improve the anaerobic digestion efficiency of sludge in the anaerobic tank 11 through stirring.

[0022] In this embodiment, a square shell 30 is arranged around the membrane assembly 17, the square shell 30 is composed of a square frame 31 and filter plates 32 arranged on each side of the square frame 31, and the square shell 30 is fixed through the fixing rod 19 to play a protective role on the membrane assembly 17, prevent water flow disturbance impact, and prevent sludge in the aerobic tank 12 from entering the membrane sheet 18 to cause pollution.

[0023] In the embodiment, the diaphragm 18 is a TiO2 / g-C3N4 / PVDF modified film, the diaphragm 18 has higher anti-pollution property, and can further degrade organic matters.

[0024] In the embodiment, the device further comprises a hydrogen peroxide dosing device 33, an activated carbon dosing device 34, a PAM dosing device 35, a PAC dosing device 36 and a stacked screw sludge dewatering machine 37, the hydrogen peroxide dosing device 33 and the activated carbon dosing device 34 are connected to the decolorization zone 7 through a medicine conveying pipe, the PAM dosing device 35 is connected to the coagulation aid zone 8 and the stacked screw sludge dewatering machine 37 through a medicine conveying pipe respectively, the PAC dosing device 36 is connected to the flocculation zone 9 through a medicine conveying pipe, and the sludge discharge ports at the bottoms of the decolorization zone 7, the coagulation aid zone 8 and the flocculation zone 9 are connected to the stacked screw sludge dewatering machine 37 through a sludge discharge pump 38.

[0025] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments in the range of the utility model without departing from the principles and purposes of the utility model, any simple modification, equivalent change and modification made according to the technical essence of the utility model to the above-mentioned embodiments still belong to the range of the technical scheme of the utility model.

Claims

1. A micro-power integrated landfill leachate harmless treatment device, characterized in that, The sewage treatment device comprises a pretreatment tank, a sequencing batch reactor and a micro-aerobic membrane bioreactor which are sequentially connected in the order of sewage treatment; the sequencing batch reactor comprises a tank body, a first partition wall and a second partition wall are arranged in the tank body to sequentially divide the inner cavity of the tank body into a decolorizing zone, a coagulation assisting zone and a flocculation zone, overflow ports are arranged at the top of the first partition wall and the second partition wall, and the overflow port of the second partition wall is lower than the overflow port of the first partition wall, so that the decolorizing zone and the coagulation assisting zone overflow from the top to the next water treatment zone; the micro-aerobic membrane bioreactor comprises an anaerobic tank and an aerobic tank, the water outlet of the flocculation zone is connected with the anaerobic tank through a water pump A, the water outlet of the anaerobic tank is connected with the aerobic tank through a water pump B, an aeration device is arranged at the bottom of the aerobic tank and connected with an aeration fan, a membrane assembly is arranged in the aerobic tank, the membrane assembly comprises a plurality of membrane sheets which are vertically arranged in the middle of the aerobic tank, the membrane sheets are fixed through fixing rods, the top end of each membrane sheet is provided with a water outlet, the water outlets are respectively collected into a main pipe through pipelines, and the main pipe is connected with a clean water tank through a water pump C.

2. The micro-power integrated landfill leachate harmless treatment device according to claim 1, characterized in that, The pretreatment tank comprises a grating well, an oil separation tank and an adjusting tank which are sequentially connected in the order of sewage treatment, the water outlet of the grating well is connected with the oil separation tank through a water pump D, the water outlet of the oil separation tank is connected with the adjusting tank through a water pump E, and the water outlet of the adjusting tank is connected with the decolorizing zone through a water pump F.

3. The micro-power integrated landfill leachate harmless treatment device according to claim 1, characterized in that, The anaerobic tank is a closed tank body structure, and a stirring device is arranged in the anaerobic tank.

4. The micro-power integrated landfill leachate harmless treatment device according to claim 1, characterized in that, A square shell is arranged around the membrane assembly, the square shell comprises a square frame and filter plates arranged on each side of the square frame, and the square shell is fixed through fixing rods.

5. The micro-power integrated landfill leachate harmless treatment device according to claim 1, characterized in that, The membrane sheet is a TiO2 / g-C3N4 / PVDF modified membrane.

6. The micro-power integrated landfill leachate harmless treatment device according to claim 1, characterized in that, The sewage treatment device further comprises a hydrogen peroxide dosing device, an activated carbon dosing device, a PAM dosing device, a PAC dosing device and a stacked screw sludge dewatering machine, the hydrogen peroxide dosing device and the activated carbon dosing device are connected with the decolorizing zone through a medicine conveying pipe, the PAM dosing device is connected with the coagulation assisting zone and the stacked screw sludge dewatering machine through a medicine conveying pipe, the PAC dosing device is connected with the flocculation zone through a medicine conveying pipe, and the sludge discharge ports at the bottom of the decolorizing zone, the coagulation assisting zone and the flocculation zone are connected with the stacked screw sludge dewatering machine through a sludge discharge pump.

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