CN115465940A - Biological membrane wastewater treatment reactor and treatment method - Google Patents
Biological membrane wastewater treatment reactor and treatment method Download PDFInfo
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- CN115465940A CN115465940A CN202211126926.6A CN202211126926A CN115465940A CN 115465940 A CN115465940 A CN 115465940A CN 202211126926 A CN202211126926 A CN 202211126926A CN 115465940 A CN115465940 A CN 115465940A
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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
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
- C02F3/082—Rotating biological contactors
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The application discloses biomembrane waste water treatment reactor includes: the first reaction tank is provided with a raw water inlet, a first circulating inlet and a first circulating outlet; the first liquid level switch is arranged in the first reaction box; the second reaction box is provided with a second circulating inlet and a second circulating outlet; the second liquid level switch is arranged in the second reaction box; and the circulating pump set is connected with the first circulating outlet and the second circulating outlet, when the first liquid level switch detects that the liquid level of the first reaction box reaches the preset height, the circulating pump set inputs the wastewater in the first reaction box into the second reaction box through the second circulating inlet, when the second liquid level switch detects that the liquid level of the second reaction box reaches the preset height, the circulating pump set inputs part of wastewater in the second reaction box into the first reaction box through the first circulating inlet, and the other part of wastewater is discharged through the outer discharge pipe. The method has the advantages of low failure rate, high denitrification efficiency, high automatic control degree and the like.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to a biomembrane wastewater treatment reactor and a treatment method.
Background
The biofilm method is one of the current wastewater treatment methods, microorganisms are attached to the surface of a carrier such as a filler, a layer of biofilm is formed by proliferation and growth, and organic pollutants in wastewater are removed along with the renewal and falling of the biofilm.
The biological rotating disc is a widely applied form of a biological membrane method, and compared with a biological filter method, the biological rotating disc has the advantages that the contact time of waste water and a biological membrane is longer, and certain controllability is realized. However, when the biological conversion is adopted to treat high-concentration organic wastewater, the problem of shaft breakage caused by overweight loading can occur under the condition that membranes are coated more, and in the rotating process, the phenomena of water inlet, water leakage and the like of a bearing of the middle shaft can be caused by excessive eccentric abrasion of the middle shaft.
Disclosure of Invention
Based on the problems of the background art, the application aims to provide a biomembrane wastewater treatment reactor and a treatment method, which can reduce the failure rate in the sewage treatment process.
In a first aspect, the present application provides a biofilm wastewater treatment reactor comprising:
the system comprises a first reaction tank, a second reaction tank and a third reaction tank, wherein a raw water inlet, a first circulation inlet and a first circulation outlet are formed in the first reaction tank;
the first liquid level switch is arranged in the first reaction box;
the second reaction box is provided with a second circulating inlet and a second circulating outlet;
the second liquid level switch is arranged in the second reaction box;
the circulating pump group is connected with the first circulating outlet and the second circulating outlet, when the first liquid level switch detects that the liquid level of the first reaction box reaches a preset height, the circulating pump group inputs the wastewater in the first reaction box into the second reaction box through the second circulating inlet, when the second liquid level switch detects that the liquid level of the second reaction box reaches the preset height, the circulating pump group inputs a part of wastewater in the second reaction box into the first reaction box through the first circulating inlet, and the other part of wastewater is discharged through an external discharge pipe;
wherein, be provided with in first reaction case and the second reaction case and be used for filtering the pollutant and generate the filler of biomembrane.
Optionally, a first spraying port is arranged at the top of the first reaction tank, and the circulating pump group is further used for inputting the wastewater in the second reaction tank into the first reaction tank through the first spraying port; the top of the second reaction box is provided with a second spraying port, and the circulating pump group is also used for inputting the wastewater in the first reaction box into the second reaction box through the second spraying port;
the lower ends of the first spraying port and the second spraying port are respectively connected with a spraying assembly.
Optionally, the cycler stack includes:
the input end of the first circulating pump is connected with a first circulating outlet, the output end of the first circulating pump is connected with a first switch valve, the output port of the first switch valve is respectively connected with the second circulating inlet and the second spraying port, and a first regulating valve is connected between the first switch valve and the second spraying port;
the input end of the second circulating pump is connected with a second circulating outlet, the output end of the second circulating pump is connected with a second switch valve, the output port of the second switch valve is respectively connected with the first circulating inlet, the first spraying port and the outer discharge pipe, a second regulating valve is connected between the second switch valve and the first spraying port, and a third regulating valve is connected between the second switch valve and the outer discharge pipe.
Optionally, the cyclepump group includes:
the input end of the third circulating pump is respectively connected with the first circulating outlet and the second circulating outlet, a third switch valve is connected between the third circulating pump and the first circulating outlet, and a fourth switch valve is connected between the third circulating pump and the second circulating outlet;
the output end of the third circulating pump is respectively connected with a fifth switch valve and a sixth switch valve, the output end of the fifth switch valve is respectively connected with the second circulating inlet and the second spraying port, and the output end of the sixth switch valve is respectively connected with the first circulating inlet, the first spraying port and the outer discharge pipe;
a fourth regulating valve is connected between the fifth switch valve and the second spraying port; and a fifth regulating valve is connected between the sixth switch valve and the first spraying port, and a sixth regulating valve is connected between the sixth switch valve and the outer discharge pipe.
Optionally, the spray assembly includes a branch pipe and a plurality of spray headers disposed on the branch pipe.
Optionally, the bottom surfaces of the first reaction box and the second reaction box are both inclined surfaces, the first circulation outlet corresponds to the lower end of the bottom surface of the first reaction box, and the second circulation outlet corresponds to the lower end of the bottom surface of the second reaction box.
Optionally, filler fixing pieces are arranged in the first reaction box and the second reaction box, and the filler fixing pieces are of frame structures;
the whole filler is flaky and is arranged in the filler fixing piece side by side.
Optionally, the filler is a three-dimensional network structure.
Optionally, the gap between adjacent said fillers is 1-10mm.
In a second aspect, the present application provides a wastewater treatment method using the biofilm wastewater treatment reactor of any one of the first aspect, comprising:
inputting wastewater to be treated into the first reaction tank through the raw water inlet;
when the first liquid level switch detects that the liquid level in the first reaction box reaches a first preset height, the circulating pump group inputs the wastewater in the first reaction box into a second reaction box;
when the second liquid level switch detects that the liquid level in the second reaction box reaches a second preset height, the circulating pump group inputs a part of wastewater in the second reaction box into the first reaction box, and the other part of wastewater is discharged through an external discharge pipe;
and in a preset time, the total flow of the raw water inlet is equal to the total flow of the external drainage pipe.
As above, this application realizes that the renewal of biomembrane drops through first liquid level switch, second liquid level switch and circulating pump group control waste water at first reaction box and the interior circulation of second reaction box, reaches COD, ammonia nitrogen, total nitrogen's in getting rid of the waste water purpose. Compared with the traditional biological rotating disc structure, the mechanical faults such as center shaft fracture, center shaft bearing water inlet and water leakage and the like caused in the rotating process of the rotating disc are avoided. And the excessive sludge mixture in the wastewater is discharged in time through the outer discharge pipe, so that the sludge mixture is prevented from being deposited at the bottom of the device.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for a person skilled in the art to obtain other drawings based on these drawings without exceeding the protection scope of the present application.
FIG. 1 is a schematic view of an overall structure of a sewage treatment apparatus according to an embodiment of the present application;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic view of the piping structure when two circulation pumps are used in the circulating pump group;
FIG. 4 is a schematic view of the piping configuration when a single circulation pump is employed in the circulating pump group;
FIG. 5 is a flow chart of a wastewater treatment method according to an embodiment of the present application.
Reference numerals refer to the following:
1. a first reaction chamber; 11. a raw water inlet; 12. a first circulation inlet; 13. a first recycle outlet; 14. a first spray port; 15. a first liquid level switch; 16. an outer row of tubes;
2. a second reaction chamber; 21. a second recycle inlet; 22. a second recycle outlet; 23. a second spray port; 24. a second liquid level switch;
3. a filler; 31. a filler fixture;
4. a spray assembly; 41. a branch pipeline; 42. a shower head;
100. a first circulation pump; 110. a first on-off valve; 120. a first regulating valve;
200. a second circulation pump; 210. a second on-off valve; 220. a second regulating valve; 230. a third regulating valve;
300. a third circulation pump; 310. a third on-off valve; 320. a fourth switching valve; 330. a fifth on-off valve; 340. a sixth switching valve; 350. a fourth regulating valve; 360. a fifth regulating valve; 370. and a sixth regulating valve.
Detailed Description
The technical solutions of the present application are described below clearly and completely in conjunction with the embodiments of the present application and the accompanying drawings, and it is obvious that the described embodiments are some, not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1 and 2, a biofilm wastewater treatment reactor disclosed in an embodiment of the present application includes a first reaction tank 1, a second reaction tank 2, and a circulating pump group, wherein a filler 3 for filtering contaminants and generating a biofilm is disposed inside each of the first reaction tank 1 and the second reaction tank 2. Optionally, the first reaction box 1 and the second reaction box 2 are integrally formed, the first reaction box 1 and the second reaction box 2 are independent of each other, inner spaces of the first reaction box 1 and the second reaction box 2 are not communicated with each other, and ventilation openings are formed in the tops of the first reaction box 1 and the second reaction box 2.
The upper part of the first reaction tank 1 is provided with a raw water inlet 11 and a first circulation inlet 12, and the lower part of the first reaction tank 1 is provided with a first circulation outlet 13. A first liquid level switch 15 is arranged in the first reaction box 1, and optionally, the first liquid level switch 15 is positioned above the filler 3 in the first reaction box 1.
The second reaction chamber 2 is provided at an upper portion thereof with a second circulation inlet 21, and the second reaction chamber 2 is provided at a lower portion thereof with a second circulation outlet 22. A second level switch 24 is arranged in the second reaction chamber 2, and optionally, the second level switch 24 is positioned above the packing 3 in the second reaction chamber 2.
The recycle pump group connects the first recycle outlet 13 and the second recycle outlet 22. According to the actual situation, the circulating pump group can comprise one or more circulating pumps, so that when the first liquid level switch 15 detects that the liquid level of the first reaction box 1 reaches a first preset height, the circulating pump group inputs the wastewater in the first reaction box 1 into the second reaction box 2 through the second circulating inlet 21; in the process that the circulation pump group conveys water into the second reaction box 2, when the second liquid level switch 24 detects that the liquid level in the second reaction box 2 reaches a second preset height, the control system controls the circulation pump group to stop conveying water into the second reaction box 2, meanwhile, a part of wastewater in the second reaction box 2 is conveyed into the first reaction box 1 through the first circulation outlet 13, and the other part of wastewater is discharged through an external discharge pipe (not shown in the figure). When the liquid level in the first reaction box 1 reaches the first preset height again, the control system controls the circulating pump group to stop delivering water into the first reaction box 1, and simultaneously the circulating pump group delivers water into the second reaction box 2 again, and the process is repeated, so that the wastewater circularly flows in the first reaction box 1 and the second reaction box 2, the period generation and the falling of the biomembrane are formed, the purpose of purifying the wastewater is achieved, and meanwhile, part of the wastewater is discharged through the external discharge pipe.
It should be noted that the first predetermined height is preferably set such that the liquid surface in the first reaction chamber 1 just passes through the packing 3 therein, and similarly, the second predetermined height is preferably set such that the liquid surface in the second reaction chamber 2 just passes through the packing 3 therein.
This application is through first liquid level switch 15, second liquid level switch 24 and circulating pump group control waste water at first reaction box 1 and the 2 inner loop of second reaction box flow, realizes that the renewal of biomembrane drops, reaches COD, ammonia nitrogen, total nitrogen's in getting rid of the waste water purpose. Compared with the traditional biological rotating disc structure, the mechanical faults such as center shaft fracture, center shaft bearing water inlet and water leakage and the like caused in the rotating process of the rotating disc are avoided. And the excessive sludge mixture in the wastewater is discharged in time through the outer discharge pipe, so that the sludge mixture is prevented from being deposited at the bottom of the device.
Referring to fig. 1, as an alternative solution of the embodiment of the present application, a first spraying port 14 is provided at the top of the first reaction chamber 1, and a second spraying port 23 is provided at the top of the second reaction chamber 2. The lower ends of the first spraying port 14 and the second spraying port 23 are respectively connected with a spraying assembly 4.
When the circulating pump group inputs the wastewater in the first reaction box 1 into the second reaction box 2, one part of the wastewater flows through the second circulating inlet 21, and the other part of the wastewater flows through the second spraying port 23; similarly, when the circulating pump group feeds the wastewater in the second reaction tank 2 into the first reaction tank 1, a part of the wastewater flows through the first circulating inlet 12, and the other part of the wastewater flows through the first shower port 14.
Through setting up first mouth 14 and the second mouth 23 that sprays, partly waste water flows downwards through first circulation entry 12 or second circulation entry 21, and partly waste water sprays from top to bottom to reduce the frequency that packs 3 and waste water are exposed to in the air, the time of balanced packing 3 upper and lower part contact air, thereby avoid the problem that the bacterial is different because of packing 3 upper portion contact air time is higher than the bacterial that the lower part leads to.
Optionally, the showerhead assembly 4 includes a branch pipe 41 and a plurality of showerhead 42 disposed on the branch pipe 41. It should be understood that the branch pipes 41 may be arranged in a plurality of crossing positions according to spatial positions so that the shower head 42 substantially covers the upper space of the reaction chamber.
For the implementation form of the circulating pump group, the embodiment of the application provides the following:
first, referring to fig. 3, the circulation pump group includes two circulation pumps, a first circulation pump 100 and a second circulation pump 200. The input end of the first circulating pump 100 is connected with the first circulating outlet 13 in a flange manner, the output end of the first circulating pump 100 is connected with a first switch valve 110, and the output end of the first switch valve 110 is respectively connected with a second circulating inlet 21 and a second spraying port 23. A first regulating valve 120 is further connected between the first switch valve 110 and the second spraying port 23, the first regulating valve 120 is used for controlling a flow rate of the second spraying port 23, specifically, the second regulating valve 120 may be an electric regulating valve or a pneumatic regulating valve, and the embodiment of the present application is not particularly limited.
The input end of the second circulation pump 200 is connected with the second circulation outlet 22 by a flange, the output end of the second circulation pump 200 is connected with a second switch valve 210, and the output end of the second switch valve 210 is respectively connected with the first circulation inlet 12, the first spraying port 14 and the external discharge pipe 16. A second regulating valve 220 is connected between the second switch valve 210 and the first spraying port 14, a third regulating valve 230 is connected between the second switch valve 210 and the outer discharge pipe 16, the second regulating valve 220 is used for controlling the flow rate of the first spraying port 14, the third regulating valve 230 is used for controlling the flow rate of the outer discharge pipe 16, and similarly, the second regulating valve 220 and the third regulating valve 230 may be electric regulating valves or pneumatic regulating valves, which is not specifically limited in the embodiment of the present application.
In the above manner, when the sewage treatment device is in operation, when the first liquid level switch 15 detects that the liquid level in the first reaction tank 1 reaches the first preset height, the signal is fed back to the control system, the control system controls the first circulating pump 100 and the first switch valve 110 to be opened, water is delivered into the second reaction tank 2, meanwhile, the flow ratio of the second circulating inlet 21 and the second spraying port 23 can be adjusted through the first adjusting valve 120, the larger the spraying flow of the second spraying port 23 is, the smaller the contact air amount of the filler 3 is, and in short, the same contact air amount of the upper part and the lower part of the filler 3 in the second reaction tank 2 is preferably used.
When the second liquid level switch 24 detects that the liquid level in the second reaction tank 2 reaches the second preset height, a signal is fed back to the control system, the control system controls the first circulating pump 100 and the first switch valve 110 to be closed, simultaneously opens the second circulating pump 200 and the second switch valve 210 to convey water into the first reaction tank 1, and simultaneously can adjust the flow ratio of three passages of the first circulating inlet 12, the first spraying port 14 and the outer discharge pipe 16 through the second adjusting valve 220 and the third adjusting valve 230, similarly, the larger the spraying flow of the first spraying port 14 is, the smaller the contact air amount of the packing 3 is, in short, the contact air amount of the upper part and the lower part of the packing 3 in the first reaction tank 1 is preferably the same as possible. When the liquid level in the first reaction tank 1 reaches the first preset height again, the second circulation pump 200 and the second on-off valve 210 are closed, and the first circulation pump 100 and the first on-off valve 110 are opened, so as to perform reciprocating operation.
It should be noted that the third regulating valve 230 should be adjusted such that the water discharge flow rate of the outer discharge pipe 16 should be equal to the water inflow rate of the raw water inlet 11 for a predetermined time. It should be further noted that the preset time refers to a time period from a certain time when the first circulation pump 100 is turned on to a next time when the first circulation pump 100 is turned on, so that the internal water amount of the sewage treatment apparatus is kept in dynamic balance during the whole operation process.
Second, referring to fig. 4, the circulation pump group employs only one circulation pump, i.e., the third circulation pump 300. The input end of the third circulation pump 300 is connected to the first circulation outlet 13 and the second circulation outlet 22, optionally, a third on-off valve 310 is connected between the third circulation pump 300 and the first circulation outlet 13, and a fourth on-off valve 320 is connected between the third circulation pump 300 and the second circulation outlet 22.
The output end of the third circulating pump 300 is connected with a fifth switch valve 330 and a sixth switch valve 340 respectively, the output end of the fifth switch valve 330 is connected with the second circulating inlet 21 and the second spraying port 23 respectively, and the output end of the sixth switch valve 340 is connected with the first circulating inlet 12, the first spraying port 14 and the outer discharge pipe 16 respectively; a fourth regulating valve 350 is connected between the fifth switch valve 330 and the second spraying port 23; a fifth regulating valve 360 is connected between the sixth switching valve 340 and the first spray port 14, and a sixth regulating valve 370 is connected between the sixth switching valve 340 and the outer discharge pipe 16.
Similarly, the fourth regulating valve 350, the fifth regulating valve 360 and the sixth regulating valve 370 are respectively used for controlling the flow of the corresponding ports, and may be an electric regulating valve or a pneumatic regulating valve, and the embodiment of the present invention is not particularly limited.
When the above-described operation is performed, in the initial state, the third switching valve 310, the fourth switching valve 320, the fifth switching valve 330, and the sixth switching valve 340 are all in the closed state. When the first liquid level switch 15 detects that the liquid level in the first reaction tank 1 reaches a first preset height, a signal is fed back to the control system, the control system controls the third circulating pump 300 to be started, the third switch valve 310 and the fifth switch valve 330 are opened at the same time, the first circulating outlet 13, the second circulating inlet 21 and the second spraying port 23 form a first passage system together, water is conveyed into the second reaction tank 2, the flow ratio of the second circulating inlet 21 and the second spraying port 23 can be adjusted through the fourth adjusting valve 350, the larger the spraying flow of the second spraying port 23 is, the smaller the contact air quantity of the filler 3 is, and in short, the contact air quantities of the upper part and the lower part of the filler 3 in the second reaction tank 2 are preferably the same as possible.
When the second liquid level switch 24 detects that the liquid level in the second reaction tank 2 reaches the second preset height, a signal is fed back to the control system, the control system controls the third on/off valve 310 and the fifth on/off valve 330 to be closed, and simultaneously opens the fourth on/off valve 320 and the sixth on/off valve 340, the second circulation outlet 22, the first circulation inlet 12, the first spray outlet 14 and the external discharge pipe 16 jointly form a second passage system, water is fed into the first reaction tank 1, and the flow ratio of the three branches of the first circulation inlet 12, the first spray outlet 14 and the external discharge pipe 16 can be adjusted by the fifth adjusting valve 360 and the sixth adjusting valve 370, similarly, the larger the spray flow of the first spray outlet 14 is, the smaller the contact air volume of the packing 3 is, and in short, the contact air volume of the upper and the lower parts of the packing 3 in the first reaction tank 1 is preferably as equal as possible. Similarly, when the liquid level in the first reaction chamber 1 reaches the first preset height again, the first passage is closed, the second passage is opened, and the operation is repeated.
Compared with the first mode, the second mode only realizes the circulating flow of the wastewater through one circulating pump, but when the third circulating pump 300 starts to operate, the third circulating pump 300 always operates, and the circulating flow of the wastewater between the first reaction tank 1 and the second reaction tank 2 needs to be realized by controlling the opening and closing of the valves of the respective on-off valves. It will also be appreciated that in the second mode, the predetermined time is a period from the time the first path is opened to the time the first path is opened again.
Referring to fig. 1, as an alternative solution to the embodiment of the present application, the bottom surfaces of the first reaction box 1 and the second reaction box 2 are both provided with inclined surfaces, the first circulation outlet 13 corresponds to the lower end of the bottom surface of the first reaction box 1, and the second circulation outlet 22 corresponds to the lower end of the bottom surface of the second reaction box 2.
By setting the bottom surfaces of the first reaction tank 1 and the second reaction tank 2 as inclined surfaces, in the sewage treatment process, the generated sludge mixture slides down the inclined surfaces to the positions corresponding to the first circulation outlet 13 and the second circulation outlet 22, then flows along with the circulation of the wastewater, and is discharged from the outer discharge pipe, so that the bottom of the first reaction tank 1 and the bottom of the second reaction tank 2 can be prevented from accumulating sediments.
Referring to fig. 1 and 2, as an alternative solution to the embodiment of the present application, a filler fixing member 31 is disposed in each of the first reaction box 1 and the second reaction box 2. The packing retainer 31 is a frame structure, and the packing retainer 31 may be made of stainless steel and forms a parallel area for placing the packing 3 therein. The whole shape of the filler 3 is a sheet structure, and the filler 3 is vertically inserted into the filler fixing member 31 from the top downwards, and the fillers are parallel to each other. Optionally, the single piece of packing 3 has a gauge of 200mm 5mm and the gaps between adjacent packing 3 are 1-10mm.
When the filler 3 is replaced, the filler 3 is vertically lifted upwards, and then a new filler 3 is inserted, so that the installation and the replacement are both convenient.
Optionally, the filler 3 is made of polyvinylidene chloride to form a three-dimensional net structure, and is in a wire mesh state with a porosity of 95% -98%. The polyvinylidene chloride has the advantages of light material, strong water-blocking effect and the like, the biological layer can enter the inside of the three-dimensional net structure, the falling probability of the biological layer on the surface of the filler 3 can be reduced, and the biological attachment amount on the filler 3 is greatly improved, so that the capacity of adapting to the flow and the change of organic matter load is improved.
Referring to fig. 5, an embodiment of the present application further discloses a sewage treatment method, and the sewage treatment apparatus according to any of the above embodiments includes the following steps:
s101: inputting wastewater to be treated into the first reaction tank through a raw water inlet.
S102: when the first liquid level switch detects that the liquid level in the first reaction box reaches a first preset height, the circulating pump group inputs the wastewater in the first reaction box into the second reaction box.
S103: when the second liquid level switch detects that the liquid level in the second reaction box reaches a second preset height, the circulating pump set stops inputting wastewater into the second reaction box, meanwhile, the circulating pump set inputs part of wastewater in the second reaction box into the first reaction box, and the other part of wastewater is discharged through the external discharge pipe.
The above process is repeated. It should be noted that, the total flow rate of the raw water inlet is equal to the total flow rate of the external drainage pipe within the preset time. The preset time refers to a time period from the time when the circulation pump group starts to feed the wastewater into the second reaction tank to the time when the circulation pump group feeds the wastewater into the second reaction tank again. Reference is made in particular to the foregoing.
The following are practical examples of wastewater treatment using the biofilm wastewater treatment reactor of the present application:
case one:
the water quality condition is as follows: the waste water is landfill leachate (high-concentration organic waste water), and the water production condition is as follows:
therefore, the ammonia nitrogen removal rate is 75%, the COD removal rate is 53.33%, the total nitrogen removal rate is 66.15%, and various pollutant indexes of the percolate (high-concentration organic wastewater) can be effectively reduced.
Case two:
the water quality condition is as follows: the waste water is municipal sewage (low-concentration organic waste water), and the water producing condition is as follows:
therefore, the ammonia nitrogen removal rate is 73.91%, the COD removal rate is 56.41%, and the total nitrogen removal rate is 60.34%, so that various pollutant indexes of municipal sewage (low-concentration organic wastewater) can be effectively reduced.
According to the analysis and the actual case result, the method has the advantages of low fault, high automatic control degree and the like compared with a biological rotating disc method, and has a short-cut nitrification and denitrification effect compared with a biological contact oxidation method and a biological filter method, the denitrification efficiency of sewage can be enhanced, and meanwhile, the consumption of a carbon source can be effectively reduced, so that the operation cost investment is reduced. In addition, special nutrient solution can be added into the biomembrane wastewater treatment reactor, special strains are directionally cultured and enriched, the treatment effect of a biochemical system is enhanced, and the operation cost is further reduced.
The embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples. However, the above description of the embodiments is only for assisting understanding of the technical solutions of the present application and the core ideas thereof. Therefore, the person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of protection of the present application. In view of the above, the description should not be taken as limiting the application.
Claims (10)
1. A biofilm wastewater treatment reactor, comprising:
the device comprises a first reaction tank, a second reaction tank and a third reaction tank, wherein the first reaction tank is provided with a raw water inlet, a first circulation inlet and a first circulation outlet;
the first liquid level switch is arranged in the first reaction box;
the second reaction box is provided with a second circulating inlet and a second circulating outlet;
the second liquid level switch is arranged in the second reaction box;
the circulating pump group is connected with the first circulating outlet and the second circulating outlet, when the first liquid level switch detects that the liquid level of the first reaction box reaches a preset height, the circulating pump group inputs the wastewater in the first reaction box into the second reaction box through the second circulating inlet, when the second liquid level switch detects that the liquid level of the second reaction box reaches the preset height, the circulating pump group inputs a part of wastewater in the second reaction box into the first reaction box through the first circulating inlet, and the other part of wastewater is discharged through an external discharge pipe;
wherein, be provided with in first reaction case and the second reaction case and be used for filtering the pollutant and generate the filler of biomembrane.
2. The biofilm wastewater treatment reactor as recited in claim 1, wherein a first spraying port is arranged at the top of the first reaction tank, and the circulating pump group is further used for inputting wastewater in the second reaction tank into the first reaction tank through the first spraying port; the top of the second reaction box is provided with a second spraying port, and the circulating pump group is also used for inputting the wastewater in the first reaction box into the second reaction box through the second spraying port;
the lower ends of the first spraying port and the second spraying port are respectively connected with a spraying assembly.
3. The biofilm wastewater treatment reactor as recited in claim 2, wherein said circulating pump assembly comprises:
the input end of the first circulating pump is connected with a first circulating outlet, the output end of the first circulating pump is connected with a first switch valve, the output port of the first switch valve is respectively connected with the second circulating inlet and the second spraying port, and a first regulating valve is connected between the first switch valve and the second spraying port;
the input end of the second circulating pump is connected with a second circulating outlet, the output end of the second circulating pump is connected with a second switch valve, the output port of the second switch valve is respectively connected with the first circulating inlet, the first spraying port and the outer discharge pipe, a second regulating valve is connected between the second switch valve and the first spraying port, and a third regulating valve is connected between the second switch valve and the outer discharge pipe.
4. The biofilm wastewater treatment reactor as recited in claim 2, wherein said circulating pump assembly comprises:
the input end of the third circulating pump is respectively connected with the first circulating outlet and the second circulating outlet, a third switch valve is connected between the third circulating pump and the first circulating outlet, and a fourth switch valve is connected between the third circulating pump and the second circulating outlet;
the output end of the third circulating pump is connected with a fifth switch valve and a sixth switch valve respectively, the output end of the fifth switch valve is connected with the second circulating inlet and the second spraying port respectively, and the output end of the sixth switch valve is connected with the first circulating inlet, the first spraying port and the outer discharge pipe respectively;
a fourth regulating valve is connected between the fifth switch valve and the second spraying port; and a fifth regulating valve is connected between the sixth switch valve and the first spraying port, and a sixth regulating valve is connected between the sixth switch valve and the outer discharge pipe.
5. The biofilm wastewater treatment reactor as recited in claim 2, wherein said spray assembly comprises a branch pipe and a plurality of spray headers disposed on said branch pipe.
6. The biofilm wastewater treatment reactor as recited in claim 1, wherein the bottom surfaces of the first reaction tank and the second reaction tank are inclined surfaces, the first circulation outlet corresponds to a lower end of the bottom surface of the first reaction tank, and the second circulation outlet corresponds to a lower end of the bottom surface of the second reaction tank.
7. The biofilm wastewater treatment reactor as recited in claim 1, wherein a filler fixing member is arranged in each of the first reaction tank and the second reaction tank, and the filler fixing member is of a frame structure;
the whole filler is flaky and is arranged in the filler fixing piece side by side.
8. The biofilm wastewater treatment reactor as recited in claim 7, wherein said packing is a three-dimensional net structure.
9. The biofilm wastewater treatment reactor as recited in claim 7, wherein a gap between adjacent said packing is 1-10mm.
10. A wastewater treatment method using the biofilm wastewater treatment reactor according to any one of claims 1 to 9, comprising:
inputting wastewater to be treated into the first reaction tank through the raw water inlet;
when the first liquid level switch detects that the liquid level in the first reaction box reaches a first preset height, the circulating pump group inputs the wastewater in the first reaction box into a second reaction box;
when the second liquid level switch detects that the liquid level in the second reaction box reaches a second preset height, the circulating pump group inputs a part of wastewater in the second reaction box into the first reaction box, and the other part of wastewater is discharged through an external discharge pipe;
and in a preset time, the total flow of the raw water inlet is equal to the total flow of the external drainage pipe.
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