CN112520956A

CN112520956A - Synchronous denitrification coupling enhanced nitrification sewage treatment system

Info

Publication number: CN112520956A
Application number: CN202110077926.0A
Authority: CN
Inventors: 李丰登; 孙长城; 桑书梅
Original assignee: Henan Hongkang Environmental Protection Technology Co ltd
Current assignee: Henan Hongkang Environmental Protection Technology Co ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-03-19

Abstract

The invention provides a sewage treatment system with synchronous denitrification coupling and enhanced nitrification, which comprises an adjusting tank, wherein the adjusting tank comprises a tank body, and a filter tank, an aerobic tank and a reaction tank which are separated by a partition plate are arranged in the tank body; be equipped with the filter screen in the filtering ponds and be used for with sewage pump sending in the filtering ponds extremely the first water pump in good oxygen pond, be equipped with agitator and oxygenation pipe in the good oxygen pond, be equipped with the air cock on the oxygenation pipe, the oxygenation union coupling has the oxygenation pump, be equipped with the filling device in the reaction tank, be equipped with a plurality of porous crack packing ball of cementing in the filling device, be equipped with carbon source dosing tank and carbon source dosing pump on the cell body, carbon source dosing tank, carbon source dosing pump and filling device pass through the dosing union coupling, the upside of filling device is equipped with the water knockout drum, be equipped with on the cell body be used for with sewage pump sending in the good oxygen pond to the second water pump in the water knockout drum. The adjusting tank has more abundant functions, and the sewage treatment effect is improved.

Description

Synchronous denitrification coupling enhanced nitrification sewage treatment system

Technical Field

The invention belongs to the technical field of sewage treatment systems, and particularly relates to a sewage treatment system for synchronous denitrification coupling enhanced nitrification.

Background

At present, most domestic sewage treatment mainly adopts a BAF process and an MBR process; the main working principle of BAF technology, namely Biological Aerated Filter (BAF), is the oxidative decomposition of microorganisms in a biological membrane adsorbed on a filter material in a reactor, the adsorption and retention effects of the filter material and the microbial membrane, and the graded predation effect of a food chain formed along the water flow direction.

The main drawbacks of BAF process are: the cost is obviously increased: the power consumption of the biological aerated filter in the sewage plant is about 0.11 ℃ per ton of sewage treated. In addition, the quantity of backwashing water is large, the design scale of a sewage plant is 6 ten thousand tons, the quantity of the backwashing water is up to more than 1.3 ten thousand tons at present, the treatment capacity of the sewage plant is reduced, and waste is caused in the aspects of power consumption, medicament addition and the like. The daily management needs to be fine: as BAF inlet water is relatively low in BOD and high in ammonia nitrogen, carbon sources such as methanol and the like need to be added, the adding amount needs to be controlled, and the normal state of microorganisms is guaranteed. The aeration rate needs to be well mastered, the ammonia nitrogen is easily higher due to insufficient aeration rate, and sand grains are washed away due to overhigh aeration rate.

The MBR process, namely a membrane-bioreactor (MBR), is a sewage biological treatment process formed by combining membrane separation and biological treatment technologies, and the bioreactor integrates the advantages of the membrane treatment technology and the biological treatment technology.

The MBR process has the main disadvantages that: firstly, the investment is large, the manufacturing cost of the membrane component is high, and the investment of the project is increased by about 30 to 50 percent compared with the investment of the conventional treatment method; and the membrane module generally has a service life of about 5 years and needs to be replaced due to the expiration, so that the operation cost is high. Secondly, high-strength aeration, high energy consumption caused by large membrane driving pressure for increasing flow speed and mud-water separation for reducing membrane pollution and greatly increased operating electricity cost; meanwhile, the concentration of dissolved oxygen in the backflow muddy water mixture is far too high due to high-strength aeration, and the strict requirements of anoxic denitrification and anaerobic phosphorus removal on the dissolved oxygen are difficult to meet, so that the nitrogen and phosphorus removal effect is poor, and the index requirements of total nitrogen and total phosphorus in effluent cannot be guaranteed. And the processing equipment is more and more complex, and has high requirements on automation of an operating system and operation and maintenance personnel.

At present, anaerobic-anoxic-aerobic (A) is commonly adopted for municipal sewage²O) process on COD, BOD₅The ammonia nitrogen has good removal effect, but the removal effect on the total nitrogen is only about 75 percent, and is influenced by the amount of a carbon source in inlet water, the residence time of an anoxic zone and the reflux of nitrifying liquid, when the reflux amount of the nitrifying liquid reaches more than 400 percent, the denitrification effect is seriously influenced because the anoxic zone is changed into an aerobic zone due to dissolved oxygen carried in the nitrifying liquid, and meanwhile, the anaerobic-anoxic-aerobic (A) is limited due to the limited amount of the carbon source in municipal sewage and the like²The further improvement of the total nitrogen removal effect of the/O) process is difficult to meet the emission requirement (TN is less than or equal to 10mg/L) or lower for the total nitrogen after the emission standard requirement is improved. The equalizing basin is the equipment commonly used among the sewage treatment system, and the equalizing basin functional design on the market is single, can't realize the effect of deep regulation treatment sewage, only can play the effect of filtering silt, and the sewage equalizing basin is difficult clean simultaneously, can't take the convenience for the user.

Disclosure of Invention

In order to solve the technical problems, the invention provides a synchronous denitrification coupling enhanced nitrification sewage treatment system, and aims to solve the technical problem that an adjusting tank in the conventional sewage treatment system is single in function. .

The technical scheme of the sewage treatment system with synchronous denitrification coupled enhanced nitrification comprises the following steps: the sewage treatment system comprises an adjusting tank, wherein the adjusting tank comprises a tank body, and a filtering tank, an aerobic tank and a reaction tank which are separated by a partition plate are arranged in the tank body;

be equipped with the filter screen in the filtering ponds and be used for with sewage pump sending in the filtering ponds extremely the first water pump in good oxygen pond, be equipped with agitator and oxygenation pipe in the good oxygen pond, be equipped with the air cock on the oxygenation pipe, the oxygenation union coupling has the oxygenation pump, be equipped with the filling device in the reaction tank, be equipped with a plurality of porous crack packing ball of cementing in the filling device, be equipped with carbon source dosing tank and carbon source dosing pump on the cell body, carbon source dosing tank, carbon source dosing pump and filling device pass through the dosing union coupling, the upside of filling device is equipped with the water knockout drum, be equipped with on the cell body be used for with sewage pump sending in the good oxygen pond to the second water pump in the water knockout drum.

As a further improvement to the above technical solution, the tank body is provided with a trash collecting box, the tank body is provided with a communication hole for communicating the trash collecting box with the filtering tank, the filtering net is arranged in an inclined manner, the lower end of the filtering net extends into the communication hole, and the communication hole at the lower side of the filtering net is provided with a leaking net.

As a further improvement to the technical scheme, the lower end of the impurity collecting box is provided with an impurity discharging port, and the impurity collecting box is provided with a sealing plate for sealing the impurity discharging port.

As a further improvement to the above technical scheme, a driving motor is arranged on the tank body, and an output shaft of the driving motor passes through; the shaft coupling with the agitator is connected, the bottom of the oxygen pond is equipped with activated carbon and absorption cotton from supreme down in proper order.

As a further improvement to the above technical solution, the water inlet of the second water pump is connected with a water inlet pipe, the lower end of the water inlet pipe extends into the bottom of the aerobic tank, the water outlet of the second water pump is connected with a water outlet pipe, and the water outlet pipe is connected with the water separator.

As a further improvement to the technical scheme, the tank body is provided with a water inlet pipe communicated with the filter tank, the water inlet pipe is positioned on the upper side of the filter screen, the tank body is provided with a drain pipe communicated with the reaction tank, and the drain pipe is positioned on the lower side of the filling device.

The invention has the beneficial effects that: when the sewage treatment system with the simultaneous denitrification coupling enhanced nitrification is used, sewage firstly enters the filtering tank through the water inlet pipe, impurities in the water are filtered by the filtering net, the impurities left on the filtering net enter the impurity collecting box under the action of gravity, the sewage entering the impurity collecting box flows back to the filtering tank through the leakage net, and the sewage in the filtering tank is pumped into the aerobic tank by the first water pump. The oxygenation pump pumps oxygen to the sewage in the aerobic tank through oxygenation pipe and air cock, and driving motor drive agitator rotates, strengthens the fusion degree of oxygen and sewage, and after the certain time of stewing, impurity in the sewage is adsorbed by absorption cotton and active carbon. The second water pump pumps the sewage in the aerobic tank to the water separator, and the water separator uniformly sprays the sewage on the filling device. Carbon source dosing tank and carbon source dosing pump set up in the filler top, and when sewage came to the filler, the carbon source can get into the filler through carbon source dosing pipe, and the dosing pipe makes the fungus class survive more intact through throwing the carbon source for the denitrogenation process is more abundant. Compared with the prior art, the adjusting tank in the sewage treatment system with simultaneous denitrification coupling enhanced nitrification has more functions, and the sewage treatment effect is improved.

Drawings

FIG. 1 is a schematic structural diagram of a regulating tank in a simultaneous denitrification coupled enhanced nitrification sewage treatment system of the present invention.

In the figure: 1. a tank body; 2. a pool cover; 3. a filtration tank; 4. an aerobic tank; 5. a reaction tank; 6. collecting sundries; 7. a leakage net; 8. a sealing plate; 9. filtering with a screen; 10. a water inlet pipe; 11. a drain pipe; 12. a first water pump; 13. a drive motor; 14. a stirrer; 15. an oxygenation pump; 16. an oxygenation pipe; 17. an air tap; 18. activated carbon; 19. adsorbing cotton; 20. a second water pump; 21. a water inlet pipe; 22. a water outlet pipe; 23. a filler; 24. a water separator; 25. a carbon source dosing box; 26. a carbon source dosing pump; 27. a medicine feeding pipe.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The specific embodiment of the sewage treatment system with simultaneous denitrification coupling and enhanced nitrification comprises an adjusting tank and a tank cover, wherein the adjusting tank comprises a tank body 1 and a tank cover 2, and the tank cover 2 is fixedly connected to the upper side of the tank body 1 through bolts.

In this embodiment, two parallel partition plates arranged at intervals are fixedly connected in the tank body 1, and the two partition plates divide the interior of the tank body 1 into a filtering tank 3, an aerobic tank 4 and a reaction tank 5. Fixedly connected with and 3 upper ends of filtering ponds go up the oral siphon 10 of intercommunication on the cell body 1, and fixedly connected with filter screen 9 in the filtering ponds 3, filter screen 9 slope is arranged. The tank body 1 is fixedly connected with a sundries collecting box 6, and the tank body 1 is provided with a communicating hole for communicating the sundries collecting box 6 with the filtering tank 3. The lower end of the filter screen 9 extends into the communicating hole, and a strainer 7 is fixedly arranged in the communicating hole at the lower side of the filter screen 9. Sewage enters the filtering tank 3 through the water inlet pipe 10, sundries in the sewage are left on the filter screen 9, the sundries slide into the sundries collecting box 6 under the action of gravity, and the sewage entering the sundries collecting box 6 flows into the filtering tank 3 through the strainer 7. In order to facilitate the cleaning of sundries in the sundries collecting box 6, the bottom of the sundries collecting box 6 is provided with sundries discharging holes, and the outer wall of the sundries collecting box 6 is fixedly connected with a sealing plate 8 for sealing the sundries discharging holes.

In this embodiment, the bottom of the filtering tank 3 is a conical structure, and the first water pump 12 is installed at the bottom of the filtering tank 3. The water inlet of the first water pump 12 extends into the conical structure of the filter tank 3 through a pipeline, and the water outlet of the first water pump 12 extends into the aerobic tank 4 through a pipeline.

In this embodiment, a driving motor 13 is fixedly connected to the tank body 1, and an output shaft of the driving motor 13 extends into the aerobic tank 4. An output shaft of the driving motor 13 is connected with a stirrer 14 through a coupler, and the stirrer 14 is positioned in the aerobic tank 4 and is used for stirring the sewage in the aerobic tank 4. An oxygen increasing pump 15 is fixedly connected to the tank body 1, an oxygen increasing pipe 16 is connected to an air outlet of the oxygen increasing pump 15, the oxygen increasing pipe 16 extends into the aerobic tank 4, a plurality of air nozzles 17 are fixedly connected to the oxygen increasing pipe 16, and oxygen is conveyed to sewage in the aerobic tank 4 through the oxygen increasing pipe 16 and the air nozzles 17 by the oxygen increasing pump 15. In this embodiment, the bottom of the aerobic tank 4 is sequentially laid with activated carbon 18 and absorbent cotton 19 from bottom to top.

In this embodiment, a filler 23 is connected in the reaction tank 5, and a plurality of porous cementing filler balls are connected in the filler 23. A carbon source dosing tank 25 and a carbon source dosing pump 26 are connected to the tank body 1, the carbon source dosing tank 25, the carbon source dosing pump 26 and the filler 23 are connected through a dosing pipe 27, a water separator 24 is connected to the upper side of the filler 23, and a second water pump 20 for pumping sewage in the aerobic tank 4 to the water separator 24 is connected to the tank body 1. The water inlet of the second water pump 20 is connected with a water inlet pipe 21, the lower end of the water inlet pipe 21 extends into the bottom of the aerobic tank 4, the water outlet of the second water pump 20 is connected with a water outlet pipe 22, and the water outlet pipe 22 is connected with a water separator 24. The tank body 1 is fixedly connected with a drain pipe 11 communicated with the reaction tank 5, and the drain pipe 11 is positioned at the lower side of the filling device 23.

When the sewage treatment system with the simultaneous denitrification coupling enhanced nitrification is used, sewage firstly enters the filtering tank 3 through the water inlet pipe 10, impurities in the water are filtered by the filtering net 9, the impurities left on the filtering net 9 enter the impurity collecting box 6 under the action of gravity, the sewage entering the impurity collecting box 6 flows back to the filtering tank 3 through the leakage net 7, and the first water pump 12 pumps the sewage in the filtering tank 3 to the aerobic tank 4. The oxygenation pump 15 pumps oxygen to the sewage in the aerobic tank 4 through the oxygenation pipe 16 and the air tap 17, the driving motor 13 drives the stirrer 14 to rotate, the fusion degree of the oxygen and the sewage is enhanced, and after standing for a certain time, impurities in the sewage are adsorbed by the adsorption cotton 19 and the activated carbon 18. The second water pump 20 pumps the sewage in the aerobic tank 4 to the water separator 24, and the water separator 24 sprays the sewage uniformly on the filler 23. Carbon source dosing tank 25 and carbon source dosing pump 26 set up in the filler 23 top, and when sewage came to filler 23, the carbon source can get into filler 23 through carbon source dosing pipe 27, and dosing pipe 27 makes the fungus survive more intact through throwing the carbon source for the denitrogenation process is more abundant. Compared with the prior art, the adjusting tank in the sewage treatment system with simultaneous denitrification coupling enhanced nitrification has more functions, and the sewage treatment effect is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The sewage treatment system is characterized by comprising an adjusting tank, wherein the adjusting tank comprises a tank body, and a filtering tank, an aerobic tank and a reaction tank which are separated by a partition plate are arranged in the tank body;

2. The sewage treatment system of claim 1, wherein the tank body is provided with a trash box, the tank body is provided with a communication hole for communicating the trash box with the filtering tank, the filtering net is arranged obliquely, the lower end of the filtering net extends into the communication hole, and the communication hole at the lower side of the filtering net is provided with a leakage net.

3. The system for treating sewage by coupling simultaneous nitrogen removal and enhanced nitrification according to claim 2, wherein the impurity discharging port is provided at a lower end of the impurity collecting box, and a sealing plate for sealing the impurity discharging port is provided on the impurity collecting box.

4. The simultaneous denitrification coupling enhanced nitrification sewage treatment system according to claim 1, wherein a driving motor is provided on the tank body, and an output shaft of the driving motor passes through; the shaft coupling with the agitator is connected, the bottom of the oxygen pond is equipped with activated carbon and absorption cotton from supreme down in proper order.

5. The sewage treatment system with simultaneous denitrification and coupling enhanced nitrification as claimed in claim 1, wherein the water inlet of the second water pump is connected with a water inlet pipe, the lower end of the water inlet pipe extends into the bottom of the aerobic tank, the water outlet of the second water pump is connected with a water outlet pipe, and the water outlet pipe is connected with the water separator.

6. The simultaneous denitrification coupling enhanced nitrification sewage treatment system according to claim 5, wherein the tank body is provided with a water inlet pipe communicated with the filtering tank, the water inlet pipe is positioned on the upper side of the filter screen, the tank body is provided with a water outlet pipe communicated with the reaction tank, and the water outlet pipe is positioned on the lower side of the filler.