CN115124193A - Landfill leachate concentrated solution treatment equipment and method - Google Patents
Landfill leachate concentrated solution treatment equipment and method Download PDFInfo
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- CN115124193A CN115124193A CN202210760708.1A CN202210760708A CN115124193A CN 115124193 A CN115124193 A CN 115124193A CN 202210760708 A CN202210760708 A CN 202210760708A CN 115124193 A CN115124193 A CN 115124193A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to the technical field of landfill leachate treatment equipment, and particularly discloses landfill leachate concentrated solution treatment equipment and a method, wherein the equipment comprises an adjusting tank, a coagulating sedimentation tank and electrolytic catalytic oxidation equipment connected to the water outlet end of the coagulating sedimentation tank, wherein a water inlet cavity, a first electrolytic cavity, a second electrolytic cavity and a water outlet cavity are sequentially arranged in the electrolytic catalytic oxidation equipment; the electrode plate group comprises a plurality of anode electrolytic plates and cathode electrolytic plates, and the invention oxidizes, decomposes and destroys the structure of organic pollutants in the percolate concentrated solution by electrolytic catalytic oxidation equipment, thereby achieving the purposes of improving the biodegradability of the percolate concentrated solution and reducing CODcr, ammonia nitrogen and total nitrogen.
Description
Technical Field
The invention relates to the technical field of landfill leachate treatment equipment, in particular to landfill leachate concentrated solution treatment equipment and a landfill leachate concentrated solution treatment method.
Background
When the landfill leachate concentrated solution is treated, the landfill leachate concentrated solution is treated as high-concentration organic wastewater, the most common process for treating the landfill leachate concentrated solution in the prior art is a recharging process, and evaporation and advanced oxidation technologies are adopted secondly, and when the recharging process is operated, the membrane of the recharging process is seriously scaled, so that the membrane recovery rate is reduced; the evaporation process for the concentrate percolate, the equipment is often severely corroded and fouled and requires unscheduled cleaning; in the advanced oxidation process, the Fenton method and the similar Fenton method are used for processing the concentrated percolate, so that the dosage of the medicament is large, and the generated mud is very much, so that the operation cost is higher; in the research on the wastewater treatment equipment, the electrolysis in the wastewater treatment is further improved, and the sewage treatment effect can be improved to a certain degree. In the wastewater treatment, a series of apparatuses including an electrolytic treatment apparatus is used.
For example, in a sewage electrolysis environmental protection treatment device with the prior patent publication No. CN110436677B, an impeller, a stirring wheel and a power generation and energy storage device linkage device are arranged, the decontamination efficiency and the ionization strength of the whole device can be adjusted through the inflow rate of sewage, and the municipal sewage can be preliminarily decontaminated to remove solid impurities, acid impurities and oil stains with various sizes, so that the municipal water standard is reached.
The device can filter and electrolyze wastewater, but during electrolysis, the positive electrode rod and the negative electrode rod are adopted in the settling chamber, impurities in the wastewater are easy to accumulate on the positive electrode rod and the negative electrode rod, the electrolysis of the wastewater is influenced, and improvement is needed. Aiming at the problems, the garbage leachate concentrated solution treatment equipment and method are provided.
Disclosure of Invention
The present invention is directed to a landfill leachate concentrate treatment apparatus and method to solve the above problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a landfill leachate concentrate treatment device comprises an adjusting tank, a coagulating sedimentation tank and an electrolytic catalytic oxidation device connected to the water outlet end of the coagulating sedimentation tank, wherein a water inlet cavity, a first electrolytic cavity, a second electrolytic cavity and a water outlet cavity are sequentially arranged in the electrolytic catalytic oxidation device, a water inlet pipe is arranged on one side of the water inlet cavity, a filter screen corresponding to the water outlet end of the water inlet pipe is arranged in the water inlet cavity, the bottom of the water inlet cavity is communicated with the first electrolytic cavity through a water opening, a star-shaped water stirring piece is arranged in the first electrolytic cavity, and electrode plate groups are arranged in the first electrolytic cavity and the second electrolytic cavity;
the electrode plate group comprises a plurality of anode electrolytic plates and cathode electrolytic plates, filler plates are arranged between every two adjacent anode electrolytic plates and every two adjacent cathode electrolytic plates, the filler plates are fixedly connected through a support rod, and fixing parts for fixing the support rod are arranged in the first electrolytic cavity and the second electrolytic cavity;
the bottom of the first electrolysis chamber and the bottom of the second electrolysis chamber are both provided with stirring pieces, and the outer side of the electrolysis catalytic oxidation equipment is provided with a driving mechanism for driving the star-shaped water stirring piece and the two groups of stirring pieces to synchronously move.
In one alternative: the tops of the anode electrolytic plates are fixedly connected through an anode fixing plate, the top of the anode fixing plate is connected with an anode wiring terminal, the anode wiring terminal extends out of the top of the electrolytic catalytic oxidation equipment, and the anode electrolytic plates are BDD polar plates.
In one alternative: the tops of the cathode electrolytic plates are fixedly connected through a cathode fixing plate, the tops of the cathode fixing plates are connected with cathode binding posts, the cathode binding posts extend out of the top of the electrolytic catalytic oxidation equipment, the bottoms of the cathode fixing plates and the bottoms of the anode fixing plates, which are far away from one side, are both connected with insulating pads, and the cathode electrolytic plates are 316 stainless steel.
In one alternative: the fixed part comprises guide grooves, four groups of guide grooves are arranged in the first electrolysis cavity and the second electrolysis cavity, the guide grooves are matched with the end parts of the supporting rods, and the bottom of the insulating pad is in contact with the tops of the supporting rods.
In one alternative: the star-shaped water shifting piece comprises a shifting rod and four groups of shifting pieces connected to the annular side wall of the shifting rod, the four groups of shifting pieces are arranged in a circumferential array, and one side, far away from the shifting rod, of each shifting piece is matched with the inner wall of the water through opening; one end of the driving lever, far away from the driving mechanism, extends out of the electrolysis catalytic oxidation equipment to be connected with the square rod, and one side of the electrolysis catalytic oxidation equipment is provided with a square groove capable of accommodating the square rod to rotate.
In one alternative: the stirring piece includes well core rod and connects a plurality of stirring vane on well core rod annular lateral wall, first electrolysis chamber and second electrolysis chamber inner chamber all rotate and install well core rod, driving lever and well core rod parallel arrangement, and driving lever and well core rod all extend electrolysis catalytic oxidation equipment near actuating mechanism one end.
In one alternative: the driving mechanism comprises a control box and a motor arranged in the control box, the power output end of the motor is connected with a motor shaft, one end, far away from the motor, of the motor shaft is connected with one group of center rods, the shaft body, extending out of the control box, of the motor shaft is connected with two groups of driving wheels, one group of driving wheels are connected with first driving wheels through first synchronous belt transmission, the first driving wheels are installed at the end parts of the other group of center rods, the other group of driving wheels are connected with second driving wheels through second synchronous belt transmission, and the second driving wheels are installed at the end parts of the shifting rods.
In one alternative: first electrolysis chamber and second electrolysis chamber inner chamber all are equipped with the water pipe, and two sets of water pipes are connected through the pump machine that sets up at electrolysis catalytic oxidation equipment top, it is equipped with the chamber of drawing water to go out water chamber top, and the intracavity that draws water is equipped with the suction pump, the pipeline that the suction pump intake end extends to second electrolysis chamber inner chamber, the pipeline that the suction pump goes out the water end extends to out the intracavity, it is equipped with the outlet pipe of connection on electrolysis catalytic oxidation equipment to go out water chamber one side.
In one alternative: the liquid outlet end of the electrolytic catalytic oxidation equipment is sequentially connected with a hydrolysis acidification tank, an A/O biochemical tank, a secondary sedimentation tank, an intermediate tank and a high-efficiency fiber filter.
Compared with the prior art, the invention has the beneficial effects that:
the BDD polar plate (boron-doped diamond) is used as an electrolytic anode, 316 stainless steel is used as an electrolytic cathode, and the BDD polar plate and the 316 stainless steel have the advantages of long service life, high current efficiency, good treatment effect, small sludge production amount and the like, so that the device can effectively carry out electrolytic treatment on wastewater, and the filler plates are filled among the electrolytic plates, so that part of components in the wastewater can be adsorbed;
oxidizing, decomposing and destroying the structure of organic pollutants in the percolate concentrated solution by electrolytic catalytic oxidation equipment to achieve the purposes of improving the biodegradability of the percolate concentrated solution and reducing CODcr, ammonia nitrogen and total nitrogen; meanwhile, the method provided by the invention is used for effectively treating the wastewater.
In the invention, the sludge in the secondary sedimentation tank completely flows back, and part of the sludge flows back to the aerobic tank, so that the sludge concentration in the aerobic tank is increased and the sludge activity in the aerobic tank is kept; and part of the sludge flows back to the hydrolysis acidification tank, so that the sludge concentration and the treatment capacity of the hydrolysis acidification tank are increased, and on the other hand, the residual activated sludge is digested in the hydrolysis tank, so that the sludge amount is reduced, and meanwhile, the digested activated sludge can supplement a carbon source for a subsequent A/O biochemical tank, so that the carbon source supplement amount of the A/O biochemical tank is reduced, and the running application is saved. By adopting the sludge backflow mode, the residual sludge is discharged only once in about one month, and the sludge reduction is over 90 percent.
Drawings
FIG. 1 is a schematic view of the structure of an electrolytic catalytic oxidation apparatus according to the present invention.
FIG. 2 is a schematic view of the internal structure of the electrolytic catalytic oxidation apparatus according to the present invention.
Fig. 3 is a schematic structural diagram of an electrode plate group and a filler plate in the invention.
Fig. 4 is a schematic front view of fig. 2 according to the present invention.
Fig. 5 is a schematic structural view of the driving mechanism of the present invention.
FIG. 6 is a flow chart of a wastewater treatment method according to the present invention.
FIG. 7 is a schematic structural diagram of a Y-shaped fiber filter material according to the present invention.
FIG. 8 is a schematic structural diagram of the Y-shaped fiber filter material of the present invention during backwashing.
In the figure: 11. an electrolytic catalytic oxidation apparatus; 12. a water inlet pipe; 13. a water outlet pipe; 14. a water inlet cavity; 15. a first electrolysis chamber; 16. a second electrolysis chamber; 17. a water outlet cavity; 18. an electrode plate group; 19. a pump machine; 20. filtering with a screen; 21. a deflector rod; 22. a shifting sheet; 23. a square bar; 24. a square groove; 25. a packing sheet; 26. a support bar; 27. an anode fixing plate; 28. an anode terminal; 29. an anode electrolytic plate; 30. a cathode fixing plate; 31. a cathode electrolyte sheet; 32. a cathode terminal; 33. an insulating pad; 34. a guide groove; 35. a center pole; 36. a stirring blade; 37. a control box; 38. a first synchronization belt; 39. a first drive wheel; 40. a second synchronous belt; 41. a second drive wheel.
Detailed Description
Referring to fig. 1-5, in an embodiment of the present invention, an apparatus for treating a landfill leachate concentrate includes an adjusting tank, a coagulating sedimentation tank, and an electrolytic catalytic oxidation device 11 connected to a water outlet end of the coagulating sedimentation tank, wherein a liquid outlet end of the electrolytic catalytic oxidation device 11 is sequentially connected to a hydrolysis-acidification tank, an a/O biochemical tank, a secondary sedimentation tank, an intermediate tank, and a high efficiency fiber filter;
as shown in fig. 2, a water inlet cavity 14, a first electrolysis cavity 15, a second electrolysis cavity 16 and a water outlet cavity 17 are sequentially arranged in the electrolytic catalytic oxidation device 11, a water inlet pipe 12 is arranged on one side of the water inlet cavity 14, and a filter screen 20 corresponding to the water outlet end of the water inlet pipe 12 is arranged in the water inlet cavity 14; as shown in FIG. 2, the section of the filter screen 20 in the invention is inverted trapezoid, when wastewater flows in, part of residual impurities in the wastewater can be accumulated at the groove of the filter screen 20, and the problem of easy blockage when a conventional horizontal filter screen is used is avoided;
the bottom of the water inlet cavity 14 is communicated with a first electrolysis cavity 15 through a water through hole, a star-shaped water stirring piece is arranged in the first electrolysis cavity 15, and electrode plate groups 18 are arranged in the first electrolysis cavity 15 and a second electrolysis cavity 16;
the waste water output of the coagulation sedimentation tank can be output to the water inlet cavity 14 through the water inlet pipe 12 for temporary storage, and then is input into the first electrolysis cavity 15 through the water through hole, the water in the water inlet cavity 14 can be assisted to enter the first electrolysis cavity 15 through the arrangement of the star-shaped water stirring piece, or the water in the water inlet cavity 14 and the water in the first electrolysis cavity 15 are mixed, so that the water is electrolyzed uniformly, and then can enter the second electrolysis cavity 16 for further electrolysis;
as shown in fig. 3, the electrode plate group 18 includes a plurality of anode electrolytic plates 29 and cathode electrolytic plates 31, the distance between the electrolytic plates may be 200 to 600mm, filler plates 25 are disposed between adjacent anode electrolytic plates 29 and cathode electrolytic plates 31, the filler plates 25 may be filled with Fe/C catalyst fillers, catalyst fillers in which activated carbon is used as a carrier and a specific metal element is added, and the like, the plurality of filler plates 25 are connected and fixed by a support rod 26, fixing portions for fixing the support rod 26 are disposed in the first electrolytic cavity 15 and the second electrolytic cavity 16, and the filler plates 25 can separate the adjacent anode electrolytic plates 29 and cathode electrolytic plates 31;
stirring pieces are arranged at the bottoms of the first electrolysis cavity 15 and the second electrolysis cavity 16, and a driving mechanism for driving the star-shaped water stirring piece and the two groups of stirring pieces to synchronously move is arranged outside the electrolytic catalytic oxidation equipment 11; the stirring piece can stir the water in the first electrolysis cavity 15 and the second electrolysis cavity 16 to promote the uniform electrolysis of the water;
in this embodiment, the waste water output of coagulating sedimentation tank can be exported to intake antrum 14 through inlet tube 12 and keep in, later through leading to in the water gap input first electrolysis chamber 15, star type water stirring spare can assist the water of intake antrum 14 to get into first electrolysis chamber 15, or intake antrum 14 and the water mixture in the first electrolysis chamber 15, electrode plate group 18 is to the water electrolysis in the first electrolysis chamber 15, filler plate 25 can be to the absorption of part impurity in the waste water, later hydroenergy gets into second electrolysis chamber 16 and further electrolyzes, hydroenergy after the electrolysis lets in out water chamber 17 and keeps in.
In this embodiment, as shown in fig. 3, the tops of a plurality of anode electrolytic plates 29 are fixedly connected by an anode fixing plate 27, the top of the anode fixing plate 27 is connected with an anode terminal 28, the anode terminal 28 extends out of the top of the electrolytic catalytic oxidation device 11, the anode electrolytic plates 29 are BDD plates, and the BDD anodes have the advantages of high conductivity, high oxygen evolution potential, low adsorptivity, high corrosion resistance, chemical stability, electrochemical stability, dimensional stability and the like, so that the BDD plates are more effective for treating leachate concentrate and other high-concentration organic wastewater by an electrolytic method;
during treatment, the decomposition degree of organic pollutants can be controlled by controlling the electrolysis time, when the CODcr of inlet water is lower than 3000mg/L and the ammonia nitrogen is lower than 200mg/L, the electrolysis time is 3 hours, the CODcr of outlet water is lower than 300mg/L and the ammonia nitrogen is lower than 5mg/L, and if the purposes of destroying the organic pollution structure to remove the toxicity and improve the biodegradability are only needed to be achieved, the electrolysis time is 20-30 minutes;
in this embodiment, as shown in fig. 3, the tops of a plurality of cathode electrolytic plates 31 are fixedly connected by a cathode fixing plate 30, the top of the cathode fixing plate 30 is connected with a cathode terminal 32, the cathode terminal 32 extends out of the top of the electrolytic catalytic oxidation apparatus 11, the bottoms of the cathode fixing plate 30 and the anode fixing plate 27 on the sides far away from each other are both connected with an insulating pad 33, and the cathode electrolytic plates 31 are made of 316 stainless steel.
In this embodiment, as shown in fig. 4, the fixing portion includes guide grooves 34, four sets of guide grooves 34 are provided in each of the first electrolytic chamber 15 and the second electrolytic chamber 16, the guide grooves 34 are engaged with the ends of the support rods 26, and the bottoms of the insulating pads 33 contact the tops of the support rods 26; when the filler plate 25 is installed, the top plate of the electrolytic catalytic oxidation device 11 corresponding to the first electrolytic chamber 15 and the second electrolytic chamber 16 is taken out, the support rod 26 slides in along the top of the guide groove 34, then the support rod stays at the bottom of the guide groove 34, so that the filler plate 25 is placed in the first electrolytic chamber 15 or the second electrolytic chamber 16, then the electrode plate group 18 is installed, the cathode fixing plate 30 and the insulating pad 33 at the bottom of the anode fixing plate 27 contact with the support rod 26, and the support rod 26 can support the electrode plate group 18.
In this embodiment, as shown in fig. 2 or fig. 4, the star-shaped water-stirring member includes a stirring rod 21 and four groups of stirring plates 22 connected to the annular side wall of the stirring rod 21, the four groups of stirring plates 22 are arranged in a circumferential array, and one side of the stirring plate 22 away from the stirring rod 21 is matched with the inner wall of the water opening; the deflector rod 21 drives the deflector piece 22 to deflect water, so that the flow and mixing of the water can be promoted, the electrolyzed water is mixed with the wastewater in the water inlet cavity 14, and the subsequent water is favorably introduced into the second electrolysis cavity 16 for further electrolysis.
In this embodiment, as shown in fig. 2 or fig. 4, the stirring element includes a central rod 35 and a plurality of stirring blades 36 connected to the annular side wall of the central rod 35, the central rod 35 is rotatably installed in the inner cavities of the first electrolysis chamber 15 and the second electrolysis chamber 16, the shift lever 21 is parallel to the central rod 35, and one ends of the shift lever 21 and the central rod 35, which are close to the driving mechanism, extend out of the electrolytic catalytic oxidation device 11; the central rod 35 drives the stirring blades 36 to stir water, so that the water is uniformly mixed and effectively electrolyzed;
in this embodiment, as shown in fig. 5, the driving mechanism includes a control box 37 and a motor disposed in the control box 37, a power output end of the motor is connected to a motor shaft, one end of the motor shaft away from the motor is connected to one of the central rods 35, the shaft of the motor shaft extending out of the control box 37 is connected to two sets of driving wheels, one of the driving wheels is connected to a first driving wheel 39 through a first synchronous belt 38, the first driving wheel 39 is mounted at an end of the other central rod 35, the other driving wheel is connected to a second driving wheel 41 through a second synchronous belt 40, and the second driving wheel 41 is mounted at an end of the shift lever 21;
when the motor works, the motor shaft drives one group of central rods 35 to rotate, so as to drive one group of stirring parts to rotate, the first driving wheel 39 and the second driving wheel 41 rotate under the transmission of the first synchronous belt 38 and the second synchronous belt 40, and the star-shaped water stirring part and the other group of stirring parts rotate;
in this embodiment, as shown in fig. 1, one end of the shift lever 21, which is away from the driving mechanism, extends out of the connection square rod 23 of the electrolytic catalytic oxidation device 11, and one side of the electrolytic catalytic oxidation device 11 is provided with a square groove 24 capable of accommodating the square rod 23 to rotate; in actual operation, the second synchronous belt 40 can be taken out, square rings corresponding to the square rod 23 and the square groove 24 are used, the square rings are clamped in the square groove 24, the square rod 23 is clamped in the square groove in the middle of the square rings, and the rotation of the shift lever 21 can be limited; when the two groups of shifting pieces 22 are contacted with the water through opening up and down, the function of blocking the water through opening can be achieved.
In this embodiment, as shown in fig. 1, the inner cavities of the first electrolysis cavity 15 and the second electrolysis cavity 16 are both provided with water pipes, two sets of water pipes are connected through a pump 19 arranged at the top of the electrolysis catalytic oxidation device 11, the top of the water outlet cavity 17 is provided with a water pumping cavity, a water pump is arranged in the water pumping cavity, a pipeline of a water inlet end of the water pump extends to the inner cavity of the second electrolysis cavity 16, a pipeline of a water outlet end of the water pump extends to the water outlet cavity 17, and a water outlet pipe 13 connected to the electrolysis catalytic oxidation device 11 is arranged on one side of the water outlet cavity 17.
Referring to fig. 6, when the wastewater is treated by the present invention, the wastewater is introduced into the regulating tank for homogenization and quantity equalization, and the hydraulic retention time is 24-36 hours; the adjusting tank can adopt an all-underground reinforced concrete structure;
water in the regulating tank can be sent into a coagulating sedimentation tank for coagulating sedimentation treatment, suspended matters and colloidal substances in sewage are removed, agents such as PAC (polyaluminium chloride), PAM (polyacrylamide) and the like are added in the process, and the hydraulic retention time is about 4 hours; the coagulating sedimentation tank adopts integrated equipment, is a PP or carbon steel corrosion-resistant structure and internally comprises functional units such as a reaction tank, a flocculation tank, a sedimentation tank and the like;
water in the coagulating sedimentation tank is introduced into an electrolytic catalytic oxidation device 11 for electrolytic catalytic oxidation treatment, firstly introduced into a water inlet cavity 14, introduced into a first electrolytic cavity 15 through a water inlet, and then electrolyzed under the action of an electrode plate group 18 to destroy the structure of organic pollutants in concentrated solution, organic pollutants in wastewater are oxidized, ammonia nitrogen is oxidized into nitrogen, the reaction time is 0.4-1 hour, the water can be further electrolyzed in a second electrolytic cavity 16, and then introduced into a water outlet cavity 17 for temporary storage;
water in the second electrolytic chamber 16 can be introduced into a hydrolysis acidification tank to hydrolyze macromolecules in the sewage into micromolecules, and the hydraulic retention time is 1-2 days; the hydrolysis acidification tank adopts an up-flow hydrolysis acidification reactor and a carbon steel anti-corrosion structure;
and (3) introducing water in the hydrolysis acidification tank into an A/O biochemical tank, and performing carbon oxidation, nitrification and denitrification treatment on the sewage. The aim of synchronously removing CODcr, ammonia nitrogen and total nitrogen is fulfilled; the A/O process is set to operate in two stages in series, and an A/O pool adopts plug flow type design; the organic load was 0.1kg BOD5/kg MLSS. d. The hydraulic retention time is 2-3 days, and the reflux ratio of the nitrifying liquid is 100-800%.
Introducing water in the A/O biochemical pool into a secondary sedimentation pool for mud-water separation; returning part of the sludge to the aerobic tank, increasing the sludge concentration of the aerobic tank and keeping the sludge activity of the aerobic tank; and part of the sludge flows back to the hydrolysis acidification tank, so that the sludge concentration and the treatment capacity of the hydrolysis acidification tank are increased, and on the other hand, the residual activated sludge is digested in the hydrolysis tank, so that the sludge amount is reduced, and meanwhile, the digested activated sludge can supplement a carbon source for a subsequent A/O biochemical tank, so that the carbon source supplement amount of the A/O biochemical tank is reduced, and the running application is saved. By adopting the sludge backflow mode, only one time of surplus sludge is discharged in about one month, and the sludge reduction is over 90 percent;
the secondary sedimentation tank adopts integrated equipment and a PP or carbon steel anti-corrosion structure; the device comprises functional units such as a reaction tank, a flocculation tank, a sedimentation tank and the like, and the hydraulic retention time is about 4 hours;
the sludge in the coagulating sedimentation tank, the hydrolysis acidification tank and the secondary sedimentation tank can be discharged into a sludge concentration tank, and then is dried by a sludge compressor, so that the subsequent treatment is convenient;
clear water in the secondary sedimentation tank flows to the intermediate tank, then stays for 1-2 hours in a hydraulic mode, and the clear water is lifted to the high-efficiency fiber filter to further remove suspended and colloidal substances in the sewage;
as shown in fig. 7 and 8, the high efficiency fiber filter filler adopts a Y-shaped fiber filter material, when filtering, the inlet water flows from top to bottom, and is filtered through the Y-shaped fiber filter material, due to the action of water pressure and the gravity of water, the Y-shaped fiber filter material becomes more and more compact from top to bottom, and the pores correspondingly become smaller and smaller, so that the upper part can intercept the suspended matters with larger particles, the lower part can intercept the suspended matters with smaller particles, the pores become smaller and smaller from top to bottom, the interception efficiency is higher and higher, and the water is effectively filtered; the filtering speed is 30-50 m/h;
when the Y-shaped fiber filter material is backwashed, the Y-shaped fiber filter material is in an expanded state, and because of the asymmetry of the structure of the filter material, under the impact of backwash water and gas, telomeres and end tails of the filter material face downwards due to large specific gravity, Y-shaped fiber bundles face upwards and rotate ceaselessly under the impact of backwash water, and the friction among the fiber bundles is intensified, so that the Y-shaped fiber filter material can be cleaned easily;
in the invention, the parameters of the Y-shaped fiber filter material are as follows:
specific gravity: about 0.5 ton/m 3 (bulk density); specific surface area: about 80 to 100m 2 Per kg; the pollutant carrying capacity is as follows: 30-50kg/m 3； Telomere diameter: 6 mm; end-to-end length: 20 mm; y-shaped fiber bundle length: 30-40 mm;
high efficiency fiber filter parameters:
the device structure is as follows: corrosion resistant carbon steel or stainless steel; designing a filtering speed: 30-55m/h, typical value 40m/h, 4 times of that of the conventional pressure filtration process; the backwashing water amount: 6L/m 2 S, water pressure: 0.1-0.15 MPa; backwashing gas volume: 40L/m 2 S, air pressure: 50-70 kPa; backwashing water source: the backwashing can be directly carried out by using the filtered inlet water (needing coagulating sedimentation treatment).
Claims (10)
1. A landfill leachate concentrated solution treatment device comprises an adjusting tank, a coagulation sedimentation tank and an electrolytic catalytic oxidation device (11) connected to the water outlet end of the coagulation sedimentation tank, and is characterized in that a water inlet cavity (14), a first electrolytic cavity (15), a second electrolytic cavity (16) and a water outlet cavity (17) are sequentially arranged in the electrolytic catalytic oxidation device (11), a water inlet pipe (12) is arranged on one side of the water inlet cavity (14), a filter screen (20) corresponding to the water outlet end of the water inlet pipe (12) is arranged in the water inlet cavity (14), the bottom of the water inlet cavity (14) is communicated with the first electrolytic cavity (15) through a water through hole, a star-shaped water stirring piece is arranged in the first electrolytic cavity (15), and electrode plate groups (18) are arranged in the first electrolytic cavity (15) and the second electrolytic cavity (16);
the electrode plate group (18) comprises a plurality of anode electrolytic plates (29) and cathode electrolytic plates (31), filler plates (25) are arranged between every two adjacent anode electrolytic plates (29) and cathode electrolytic plates (31), the filler plates (25) are fixedly connected through supporting rods (26), and fixing parts for fixing the supporting rods (26) are arranged in the first electrolytic cavity (15) and the second electrolytic cavity (16);
stirring pieces are arranged at the bottoms of the first electrolysis cavity (15) and the second electrolysis cavity (16), and a driving mechanism for driving the star-shaped water stirring piece and the two groups of stirring pieces to synchronously move is arranged on the outer side of the electrolysis catalytic oxidation equipment (11).
2. A landfill leachate concentrate treatment plant according to claim 1, wherein a plurality of anode plates (29) are fixed to each other by anode fixing plates (27), anode posts (28) are connected to the tops of the anode fixing plates (27), the anode posts (28) extend out of the tops of the electrolytic catalytic oxidation devices (11), and the anode plates (29) are BDD plates.
3. A landfill leachate concentrate treatment installation according to claim 2, wherein a plurality of the cathode fixing plates (31) are connected and fixed at the tops thereof through cathode fixing plates (30), cathode terminals (32) are connected at the tops of the cathode fixing plates (30), the cathode terminals (32) extend out of the tops of the electrolytic catalytic oxidation devices (11), the insulating mats (33) are connected to the bottoms of the cathode fixing plates (30) and the anode fixing plates (27) on the sides far away from each other, and the cathode fixing plates (31) are made of 316 stainless steel.
4. A landfill leachate concentrate treatment installation according to claim 3, wherein the fixed part comprises guide slots (34), four sets of guide slots (34) are provided in each of the first electrolysis chamber (15) and the second electrolysis chamber (16), the guide slots (34) are fitted to the ends of the support rods (26), and the bottom of the insulating pad (33) contacts the top of the support rods (26).
5. The landfill leachate concentrate treatment equipment of claim 1, wherein the star-shaped water deflector comprises a deflector rod (21) and four groups of deflector plates (22) connected to the annular side wall of the deflector rod (21), the four groups of deflector plates (22) are arranged in a circumferential array, and one side of each deflector plate (22) far away from the deflector rod (21) is matched with the inner wall of the water through opening; one end of the deflector rod (21), which is far away from the driving mechanism, extends out of the electrolysis catalytic oxidation device (11) to be connected with the square rod (23), and one side of the electrolysis catalytic oxidation device (11) is provided with a square groove (24) capable of accommodating the square rod (23) to rotate.
6. A landfill leachate concentrate treatment equipment according to claim 5, wherein the stirring member comprises a central rod (35) and a plurality of stirring blades (36) connected to the annular side wall of the central rod (35), the central rod (35) is rotatably mounted in the inner cavities of the first electrolysis chamber (15) and the second electrolysis chamber (16), the deflector rod (21) is arranged in parallel with the central rod (35), and the deflector rod (21) and the central rod (35) extend out of the electrolytic catalytic oxidation device (11) at the ends close to the driving mechanism.
7. A landfill leachate concentrate treatment plant according to claim 6, wherein the driving mechanism comprises a control box (37) and a motor disposed in the control box (37), the power output end of the motor is connected to a motor shaft, one end of the motor shaft remote from the motor is connected to one of the central rods (35), the shaft extending out of the control box (37) is connected to two sets of driving wheels, one of the driving wheels is connected to a first driving wheel (39) through a first timing belt (38), the first driving wheel (39) is mounted at the end of the other set of central rods (35), the other set of driving wheels is connected to a second driving wheel (41) through a second timing belt (40), and the second driving wheel (41) is mounted at the end of the driving lever (21).
8. 2, the landfill leachate concentrate treatment equipment according to claim 1, wherein the first electrolysis chamber (15) and the second electrolysis chamber (16) are provided with water pipes, the two water pipes are connected through a pump (19) arranged at the top of the electrolytic catalytic oxidation device (11), the water outlet chamber (17) is provided with a water pumping chamber at the top, a water pump is arranged in the water pumping chamber, a pipeline at the water inlet end of the water pump extends to the inner chamber of the second electrolysis chamber (16), a pipeline at the water outlet end of the water pump extends to the water outlet chamber (17), and a water outlet pipe (13) connected to the electrolytic catalytic oxidation device (11) is arranged on one side of the water outlet chamber (17).
9. The landfill leachate concentrate treatment equipment according to claim 1, wherein the outlet end of the electrolytic catalytic oxidation device (11) is sequentially connected with a hydrolysis acidification tank, an A/O biochemical tank, a secondary sedimentation tank, an intermediate tank and a high efficiency fiber filter.
10. A method of using the landfill concentrate treatment facility of claim 9, comprising the steps of:
step one, introducing the wastewater into a regulating tank for homogenizing and equalizing, and allowing the wastewater to stay for 24-36 hours by waterpower;
and step two, water in the regulating reservoir can be sent into a coagulating sedimentation tank for coagulating sedimentation treatment, and suspended matters and colloidal substances in the sewage are removed. During the process, agents such as PAC, PAM and the like are added, and the hydraulic retention time is about 4 hours;
step three, introducing water in the coagulating sedimentation tank into electrolytic catalytic oxidation equipment (11) for electrolytic catalytic oxidation treatment, introducing the water into a water inlet cavity (14), introducing the water into a first electrolytic cavity (15) through a water inlet, then electrolyzing under the action of an electrode plate group (18), destroying the structure of organic pollutants in concentrated solution, oxidizing the organic pollutants in the wastewater, oxidizing ammonia nitrogen into nitrogen, reacting for 0.4-1 hour, further electrolyzing in a second electrolytic cavity (16), and then temporarily storing in a water outlet cavity (17);
step four, water in the second electrolysis cavity (16) can be introduced into a hydrolysis acidification pool to hydrolyze macromolecules in the sewage into micromolecules, and the hydraulic retention time is 1-2 days; the hydrolysis acidification tank adopts an up-flow hydrolysis acidification reactor and a carbon steel anti-corrosion structure;
introducing water into an A/O biochemical pool, and performing carbon oxidation, nitrification and denitrification treatment on the sewage; the A/O pool adopts plug flow design to achieve the purpose of synchronously removing CODcr, ammonia nitrogen and total nitrogen;
step six, introducing water in the A/O biochemical pool into a secondary sedimentation tank for sludge-water separation, returning part of sludge to the aerobic tank, increasing the sludge concentration of the aerobic tank and keeping the sludge activity of the aerobic tank; and part of the sludge flows back to the hydrolysis acidification tank, so that the sludge concentration and the treatment capacity of the hydrolysis acidification tank are increased, and on the other hand, the residual activated sludge is digested in the hydrolysis tank, so that the sludge amount is reduced, and meanwhile, the digested activated sludge can supplement a carbon source for a subsequent A/O biochemical tank, so that the carbon source supplement amount of the A/O biochemical tank is reduced, and the running application is saved. By adopting the sludge backflow mode, only one time of surplus sludge is discharged in about one month, and the sludge reduction is over 90 percent;
and step six, allowing clear water in the secondary sedimentation tank to flow to the intermediate tank, then allowing the clear water to stay for 1-2 hours, and lifting the clear water to the high-efficiency fiber filter to further remove suspended and colloidal substances in the sewage.
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