CN209428226U - A kind of sludge dual reflux AOA biofilm treatment apparatus applied to sewage water denitrification - Google Patents

Abstract

The utility model discloses a kind of sludge dual reflux AOA biofilm treatment apparatus applied to sewage water denitrification, including raw water box, the raw water box is connected by the water inlet of water inlet pipe and intake pump, the water outlet of the intake pump is connect with anaerobic pond, the anaerobic pond is connect with aerobic tank, the aerobic tank is connect with anoxic pond, the anaerobic pond is connect with secondary settling tank, the bottom of the secondary settling tank connect the anaerobic pond and the anoxic pond by the sludge reflux pump being connected with mud return line respectively, and the top of the secondary settling tank is equipped with outlet pipe.The characteristics of processing unit can be realized sewage deep denitrogenation, solve the problems, such as that activated sludge concentration is low, and have structure simple, good sewage processing effect, high-efficient, be suitable for Practical Project transformation.

Description

A sludge double-reflux AOA biofilm treatment device applied to sewage denitrification

technical field

The utility model relates to the technical field of sewage treatment, in particular to a sludge double-reflux AOA biofilm treatment device applied to sewage denitrification.

Background technique

With the improvement of people's living standards, the phenomenon of water eutrophication is becoming more and more serious, mainly because a large amount of domestic sewage and industrial wastewater rich in nitrogen, phosphorus and other elements are discharged into natural water bodies such as rivers and lakes, which exceeds the self-purification capacity of water bodies. . The deterioration of water quality has seriously affected people's production and life and sustainable development. Therefore, the problem of water eutrophication has attracted extensive attention and attention. In recent years, my country has invested a lot of money to control the eutrophication of water bodies such as Taihu Lake and Dianchi Lake. However, it is still very difficult to restore the situation before pollution. The fundamental method to solve the problem of water eutrophication is to carry out deep denitrification and phosphorus removal of sewage and then discharge it into natural water bodies. At present, how to reduce energy consumption and cost while achieving efficient nitrogen and phosphorus removal is of great significance to sewage biological treatment.

Utility model content

Aiming at the above-mentioned technical problems in the related art, the utility model proposes a sludge double-reflux AOA biofilm treatment device applied to sewage denitrification, which can overcome the above-mentioned shortcomings of the prior art.

For realizing above-mentioned technical purpose, technical scheme of the present utility model is realized like this:

A sludge double-reflux AOA (anaerobic/aerobic/anoxic) biofilm treatment device applied to sewage denitrification, including a raw water tank, the raw water tank is connected to the water inlet of the water inlet pump through a water inlet pipe, and the inlet The water outlet of the water pump is connected with the anaerobic tank, the anaerobic tank is connected with the aerobic tank, the aerobic tank is connected with the anoxic tank, the anaerobic tank is connected with the secondary sedimentation tank, and the bottom of the secondary sedimentation tank The anaerobic tank and the anoxic tank are respectively connected through a sludge return pump connected with a sludge return pipe, the upper part of the secondary settling tank is provided with an outlet pipe, and the anoxic tank is provided with biological fillers.

Further, the anaerobic pool and anoxic pool are equipped with stirring devices.

Further, a microporous aeration device is provided at the bottom of the aerobic tank, and the microporous aeration device is connected to an air pump through a gas flow meter.

The beneficial effects of the utility model:

(1) The waste water is treated in the form of AOA biofilm. Compared with the traditional A ² /O process, this process cancels the return flow of nitrifying liquid and reduces the operating cost;

(2) By adopting double sludge return flow, the sludge concentration in the anoxic tank is increased, the endogenous denitrification rate of activated sludge is accelerated, and the ability to degrade nitrogen in the sewage treatment process is improved, so that the effluent index is better than that of the discharge standard.

(3) The volume of the aeration tank is greatly reduced, saving energy consumption for aeration.

(4) Long sludge residence time, trace or small amount of residual sludge, strong ability to withstand changes in water quality and water volume, no MBR membrane pollution problem, no need to clean; the secondary sedimentation tank is combined with a magnetic flocculation sedimentation tank water purification system , for municipal sewage, the effluent CODcr is lower than 20-30mg/L, the ammonia nitrogen is lower than 1mg/L, the TN is lower than 10mg/L, and the TP is lower than 0.5mg/L; the total energy consumption is low, the gas consumption is low, the maintenance is less, and the operation The cost is much lower than MBR; there is no need to add carbon sources (using sewage and sludge carbon sources);

(5) This treatment device is suitable for engineering applications, and is suitable for new construction and renovation of sewage treatment plants of various scales. The technology is advanced, investment is saved, operation is economical, and the effluent water quality is good;

(6) This treatment device can realize deep denitrification of sewage, solve the problem of low concentration of activated sludge, and has the characteristics of simple structure, good sewage treatment effect and high efficiency, and is suitable for actual engineering transformation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is a schematic structural view of a sludge double-reflux AOA biofilm treatment device applied to sewage denitrification according to an embodiment of the present invention;

In the figure: 1. Raw water tank, 2. Water inlet pipe, 3. Water inlet pump, 4. Stirring device, 5. Anaerobic tank, 6. Aerobic tank, 7. Air pump, 8. Gas flow meter, 9. Microporous exposure Gas device, 10, anoxic tank, 11, biological filler, 12, secondary settling tank, 13, sludge return pipe, 14, sludge return pump, 15, outlet pipe.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in Figure 1, a sludge double-reflux AOA biofilm treatment device applied to sewage denitrification according to the embodiment of the utility model includes a raw water tank 1, and the raw water tank 1 is connected to the water inlet pump through the water inlet pipe 2. 3, the water outlet of the water inlet pump 3 is connected to the anaerobic pool 5, the anaerobic pool 5 is connected to the aerobic pool 6, the aerobic pool 6 is connected to the anoxic pool 10, and the anaerobic pool 6 is connected to the anoxic pool 10. The oxygen tank 10 is connected with the secondary settling tank 12, and the bottom of the secondary settling tank 12 is connected with the anaerobic tank 5 and the anoxic tank 10 through the sludge return pump 14 connected with the sludge return pipe 13 respectively. The top of the secondary sink 12 is provided with an outlet pipe 15 . Both the anaerobic tank 5 and the anoxic tank 10 are equipped with a stirring device 4 . A microporous aeration device 9 is provided at the bottom of the aerobic tank 6 , and the microporous aeration device 9 is connected to an air pump 7 through a gas flow meter 8 . The anoxic tank 10 is provided with a biological filler 11 .

In order to facilitate the understanding of the above-mentioned technical solution of the present utility model, the above-mentioned technical solution of the present utility model will be described in detail below through specific usage modes.

In specific use, first, the sewage enters the anaerobic tank 5 of the reactor from the raw water tank 1 through the water inlet pipe 2 and the water inlet pump 3, and is fully mixed with the activated sludge in the reactor by the stirring device 4. At this stage, the microorganisms mainly convert the sewage The organic matter in the sludge is stored in the cells; then the mixed sludge enters the aerobic tank 6, and the dissolved oxygen provided by the air pump 7, the gas flow meter 8 and the microporous aeration device 9, the nitrifying bacteria in the sludge carry out the nitrification reaction, and the sewage The ammonia nitrogen in the system is converted into nitrate nitrogen or nitrite nitrogen; finally enters the anoxic tank 10 of the reactor, where the stirring device 4 makes the sludge in the system in a mixed state, through the endogenous denitrifying bacteria and the anaerobic denitrification on the biological filler 11 The ammonium oxidizing bacteria convert the nitrogen in the sewage into nitrogen and discharge it into the air, thereby realizing the denitrification process of the sewage.

Taking the influent of a sewage plant in Beijing as the treatment object, the specific water quality is as follows: COD is 100-250mg/L, NH ₄ ⁺ is 30-35 mg/L, NO ₃ ^- ≤1.1 mg/L, NO ₂ ^- ≤0.4 mg/L L. The test results show that after the operation is stable, the COD of urban sewage after passing through the anaerobic section of the sludge double-reflux AOA biofilm treatment device is 35-45 mg/L, the NH ₄ ⁺ is 15-18 mg/L, and the NO ₃ ^- is 0- 0.2mg/L, NO ₂ ^- is 0-0.2 mg/L; NH ₄ ⁺ is 0-1.0 mg/L after aerobic stage, NO ₃ ^- is 10-15 mg/L, NO ₂ ^- is 0-5mg /L; after the last anoxic stage, COD is 30-45 mg/L, NH ₄ ⁺ is 0-1.0 mg/L, NO ₃ ^- is 0-8.0 mg/L, NO ₂ ^- is 0-0.5 mg/L ; The test results show that the pollutants such as TN and TP in the effluent have been treated in depth, and they have reached the national first-class A discharge standard stably.

To sum up, with the help of the above technical solution of the utility model, sewage is treated through microbial nitrification and denitrification reaction, so as to achieve the purpose of sewage denitrification. The device has a simple structure, good effect and high efficiency on domestic sewage treatment.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (3)

1. a kind of sludge dual reflux AOA biofilm treatment apparatus applied to sewage water denitrification, it is characterised in that: including raw water box (1), the raw water box (1) is connect by water inlet pipe (2) with the water inlet of intake pump (3), the water outlet of the intake pump (3) and Anaerobic pond (5) connection, the anaerobic pond (5) connect with aerobic tank (6), and the aerobic tank (6) connect with anoxic pond (10), described Anaerobic pond (5) is connect with secondary settling tank (12), and the bottom of the secondary settling tank (12) is respectively by being connected with mud return line (13) Sludge reflux pump (14) connects the anaerobic pond (5) and the anoxic pond (10), and the top of the secondary settling tank (12) is equipped with water outlet It manages (15), is equipped with biologic packing material (11) in the anoxic pond (10).

2. a kind of sludge dual reflux AOA biofilm treatment apparatus applied to sewage water denitrification according to claim 1, special Sign is: the anaerobic pond (5), anoxic pond (10) are equipped with agitating device (4).

3. a kind of sludge dual reflux AOA biofilm treatment apparatus applied to sewage water denitrification according to claim 1, special Sign is: aerobic tank (6) bottom is equipped with microporous aeration device (9), and the microporous aeration device (9) passes through gas flowmeter (8) it is connect with air pump (7).