CN211471159U - A new type of biological aerated filter - Google Patents

Abstract

The utility model discloses a novel aeration biological filter, which belongs to the technical field of sewage treatment. A novel biological aeration filter of the utility model comprises a pool body and filter fillers, a water inlet is provided on the outer surface of the bottom of the pool body, a water outlet is provided on the outer surface of the upper part of the pool body, and the interior of the pool body is provided with a water inlet. A support layer is installed horizontally, and filter fillers are laid horizontally above the support layer. The aeration biological filter uses the support layer and the ceramsite layer as fillers for film hanging to increase activated sludge. In order to solve the problem of unsatisfactory effluent quality of small sewage treatment process; a water filter plate is fixedly installed under the support layer, and the evenly distributed water distribution holes on the water filter plate can evenly distribute sewage to the ceramsite layer; The water filter plate and the pool body are installed at the place where sewage needs to be treated as a whole, and when in use, they are directly poured on site to reduce the cost of transportation and hoisting.

Description

A new type of biological aerated filter

technical field

The utility model relates to the technical field of sewage treatment, in particular to a novel aerated biological filter.

Background technique

Biological aerated filter (BAF) is a biofilm wastewater treatment technology developed in recent years. The process principle is as follows: the filter tank is filled with biological filter material with a small particle size, and the filter material is aerated through the inside of the filter tank, and a highly active biofilm grows on the surface of the filter material; when the sewage flows through, the highly active biofilm on the filter material surface is used. The bio-oxidative degradation of the biological flocs between the biofilm and the filter material, and the biochemical treatment of the sewage; due to the small particle size of the filter material and the compacted state, under the adsorption of the biological flocs between the biofilm and the filter material, the filter The layer can adsorb and retain a large part of the suspended solids in the sewage (including the shed biofilm), and there is no need to set up a sedimentation tank afterwards. With the extension of operating time, the head loss of the filter tank gradually increases. When the design value is reached, the filter tank needs to be backwashed to clean the retained suspended solids and the aging biofilm. Compared with the ordinary activated sludge method, the aerated biological filter has the advantages of high organic load, small footprint (1/3 of the ordinary activated sludge method), less investment (saving 30%), no sludge bulking, It has the advantages of high oxygen transmission efficiency and good effluent quality. The selection of the filter material of the biological aerated filter plays a crucial role in the design and operation of the entire process.

At present, the existing small biological aerated filters are mostly integrated buried equipment. The buried integrated equipment is not very ideal for water quality treatment in practical application. The internal filler is elastic filler, which is inconvenient to replace, and the treatment effect is not ceramsite. The treatment effect is good, and the maintenance of the buried integrated equipment is inconvenient. Only a small manhole is set up, which is inconvenient for maintenance in the event of a problem.

For example, the Chinese patent with the authorization announcement number: CN104710078B and the authorization announcement date: August 31, 2016 discloses a buried integrated domestic sewage treatment device and method, including a grid pool, a regulating pool, and anaerobic digestion. The tank, the anaerobic biological filter, the aerobic biological filter I, the aerobic biological filter I, the aerobic biological filter, the vertical flow sedimentation tank and the control room are buried three-dimensional integrated devices. It includes an upper part and a lower part, the upper part is located in the upper part of the control room, the upper part is provided with an electric control box and an ultraviolet device, and the lower part is equipped with a fan and a dosing equipment. The equipment has convenient drainage and low energy consumption, which is conducive to energy conservation and environmental protection. On the basis of mainly relying on biodegradation, chemical treatment technology is supplemented to ensure that the effluent quality meets the discharge standards; however, the equipment costs are relatively high, and the maintenance cost is also relatively high; in addition, Construction work is not possible in some areas, especially in confined spaces and remote areas.

Utility model content

1. Technical problems to be solved by the utility model

Aiming at the problems in the prior art that the traditional buried integrated biological aeration filter is a carbon steel anti-corrosion structure, and construction operations cannot be carried out in some areas, the utility model discloses a novel biological aeration filter. In the biological filter, the supporting layer and the ceramsite layer are used as fillers for film hanging to increase the adhesion rate of activated sludge, so as to solve the problems of unsatisfactory effluent quality of small sewage treatment processes.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the present utility model is:

A novel biological aeration filter, comprising a pool body and filter fillers, a water inlet is provided on the outer surface of the bottom of the pool body, a water outlet is provided on the outer surface of the upper part of the pool body, and a horizontally fixed horizontally installed inside the pool body. The support layer, the filter filler is horizontally layered above the support layer, and the filter filler is a ceramsite layer. The use of the ceramsite filler can increase the service life of the filler and increase the adhesion rate of activated sludge, and The function of the filter tank supporting layer is to prevent the loss of ceramsite filler from the water collection system when the sewage is filtered; the water outlet and the tank body above it are located above the ground, and the rest are located below the ground, and the sewage flows from the bottom of the tank body. It is passed into the filter tank through the water inlet and distributed to the ceramsite layer. Under the biochemical reaction of the activated sludge, the pollutants in the water can be removed, and the treated water is discharged through the water outlet.

In a further technical solution, the water filter plate is arranged horizontally under the supporting layer, before putting the filter filler, firstly, the water filter plate is fixedly installed inside the pool body, and the side surface of the water filter plate is fixed on the inner surface of the pool body. , and the water filter plate is fixed at the lower part of the tank body. Before installing the filter tank filler, the water filter plate and the tank body are installed as a whole in the place where sewage needs to be treated, and then the filter tank filler is installed, so as to realize direct on-site pouring and reduce Shipping and lifting costs.

In a further technical solution, the water filter plate is in the shape of a disc, and water distribution holes are evenly opened on it. After the bottom is filled with water, the evenly distributed water distribution holes can evenly distribute the sewage to the ceramsite layer, so as to ensure that the filter tank is filled with water. The sewage flow is stable, and the filter filler will not be washed directly to ensure the adhesion rate of activated sludge.

In a further technical scheme, the outside of the pool body is also provided with an air inlet, which leads to the inside of the pool body; an aeration channel is arranged between the water filter plate and the supporting layer, and an aeration channel is arranged on the aeration channel. Aeration hole, the aeration channel is communicated with the air inlet; aeration is a means of making the air and water in strong contact, and its purpose is to dissolve the oxygen in the air in the water, or to remove the unnecessary gas and water in the water. Volatile substances are exiled into the air; after the air enters the aeration channel from the air inlet, oxygen is released into the filter tank through the aeration hole, and the filter tank can provide a certain residence time of sewage to meet the oxygen required by aerobic microorganisms. And the mixing conditions in which the sewage and the activated sludge are fully contacted.

In a further technical solution, a gas backwashing channel is arranged under the water filter plate, a gas backwashing hole is arranged on the gas backwashing channel, and the gas backwashing channel is communicated with the air inlet. In use, the water distribution holes of the water filter plate may be blocked. By ventilating the air inlet and passing water to the water inlet, the effect of mixed flushing with air and water can be realized, so as to avoid the blockage of the water distribution holes and ensure the uniformity of the water filter plate. Water distribution.

In a further technical solution, the tank body is a cylinder, and the circular tank body can increase the treated water volume, increase the specific surface area of the activated sludge, and improve the effluent quality; and the device occupies a small area to solve problems such as limited site area. .

3. Beneficial effects

Compared with the prior art, the technical scheme provided by the present utility model has the following beneficial effects:

(1) In a novel aerated biological filter of the present invention, the use of ceramsite fillers can increase the service life of the fillers and increase the adhesion rate of activated sludge;

(2) In a novel aerated biological filter of the present invention, when the sewage is filtered, the filter support layer can prevent the loss of the ceramsite filler from the water collection system;

(3) In a novel aerated biological filter of the present utility model, sewage enters water from the bottom of the tank body, passes into the filter tank through the water inlet, and is distributed to the ceramsite layer. Under the biochemical reaction of activated sludge, It can remove pollutants in the water, and the treated water is discharged through the water outlet;

(4) In a novel aerated biological filter of the present utility model, the water filter plate and the tank body are installed as a whole at the place where sewage needs to be treated, and then the filter tank filler is installed, so as to realize direct pouring on site and reduce transportation and hoisting. the cost of;

(5) In a novel aerated biological filter of the present utility model, the water distribution holes can evenly distribute the sewage to the ceramsite layer, so as to ensure the smooth flow of sewage in the filter, and the filter filler will not be washed directly, so as to ensure the active sewage The adhesion rate of mud;

(6) In a novel biological aeration filter of the present invention, after the air enters the aeration channel from the air inlet, oxygen is released into the filter tank through the aeration hole, and the filter tank can provide a certain residence time of sewage, so as to satisfy the The amount of oxygen required by oxygen microorganisms, and the mixing conditions for full contact between sewage and activated sludge;

(7) In a novel aerated biological filter of the present utility model, the gas backwashing channel is communicated with the air inlet, thereby flushing the water filter plate and avoiding clogging of the water distribution hole;

(8) A novel biological aerated filter of the present utility model, the circular tank body can increase the amount of treated water, increase the specific surface area of activated sludge, and improve the quality of effluent; and the device occupies a small area to solve the problem of site area limited problems.

Description of drawings

1 is a schematic diagram of the cross-sectional structure of an aerated biological filter of the present invention;

Figure 2 is a top view of the water filter plate in the utility model.

In the figure: 1-pool body; 2-water inlet; 3-water outlet; 4-ceramsite layer; 5-supporting layer; 6-air inlet; 7-water filter plate; 61-gas backwash channel; 62 - Aeration channel; 71 - water distribution hole; D - ground.

Detailed ways

In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.

Example 1

As shown in FIG. 1 , a novel aerated biofilter of the present embodiment includes a tank body 1 and filter tank fillers. A water inlet 2 is opened on the outer surface of the bottom of the tank body 1 , and the upper part of the tank body 1 is provided with a water inlet 2 . The outer surface is provided with a water outlet 3, and a supporting layer 5 is fixed laterally inside the tank body. The top of the supporting layer 5 is horizontally layered with filter tank fillers. When paving the bottom layer of supporting fillers, Care should be taken to avoid damage to the water distribution system of the filter tank. After the next layer is laid, the upper layer of filler can be installed; the filter tank filler is ceramsite layer 4, and the use of ceramsite filler can increase the service life of the filler and increase its activity. The adhesion rate of sludge, and the function of the filter tank supporting layer 5 is to prevent the loss of ceramsite filler from the water collection system when the sewage is filtered; the water outlet 3 and the tank body 1 above it are located above the ground D, The rest is located below the ground D. The sewage flows into the filter tank from the bottom of the tank body 1 through the water inlet 2. With the increase of sewage in the tank, the sewage height gradually rises to the ceramsite layer 4. Under the biochemical reaction of activated sludge, The pollutants in the water can be removed, and the treated water is discharged through the water outlet 3.

Example 2

The basic structure of a novel biological aerated filter of this embodiment is the same as that of Embodiment 1. The differences and improvements are: as shown in FIG. Before filling the filter tank, firstly, the water filter plate 7 is fixedly installed inside the pool body 1, the side surface of the water filter plate 7 is fixed on the inner surface of the pool body 1, and the water filter plate 7 is fixed at the lower position of the pool body 1. , Before installing the filter tank filler, the water filter plate 7 and the tank body 1 are installed as a whole at the place where the sewage needs to be treated, and then the filter tank filler is installed, so as to realize direct pouring on site and reduce the cost of transportation and hoisting.

Example 3

The basic structure of a novel biological aerated filter of this embodiment is the same as that of Embodiment 2, and the difference and improvement are: as shown in FIG. Hole 71, circular water distribution hole 71 can adopt integrated dismantling filter plate, which is convenient for installation; sewage flows into the filter tank from the bottom of the filter tank through the water inlet 2, with the increase of sewage in the tank, the sewage height gradually rises to the water filter plate 7. The water distribution holes 71 on the water filter plate 7 are evenly distributed, so that after the sewage passes through the water distribution holes 71, it can be evenly distributed to the ceramsite layer 4, so as to ensure the smooth flow of sewage in the filter tank, and will not directly wash the filter tank filler to ensure Adhesion rate of activated sludge.

Example 4

The basic structure of a novel biological aerated filter of this embodiment is the same as that of Embodiment 3, and the difference and improvement are: as shown in FIG. Inside the pool body 1; an aeration channel 62 is arranged between the water filter plate 7 and the supporting layer 5, and the aeration channel 62 is provided with aeration holes, and the aeration channel 62 and the air inlet 6 Connected; aeration is a means of making strong contact between air and water, the purpose of which is to dissolve oxygen in the air into water, or to expel unnecessary gases and volatile substances in water into the air; air from the air inlet 6 After entering the aeration channel 62, oxygen is released into the filter tank through the aeration holes, and the filter tank can provide a certain residence time of sewage, so as to meet the oxygen amount required by aerobic microorganisms and the mixing conditions for the full contact between sewage and activated sludge .

Example 5

The basic structure of a novel biological aerated filter of this embodiment is the same as that of Embodiment 4. The differences and improvements are: as shown in FIG. 1 , a gas backwashing channel 61 is provided under the water filter The gas backwashing channel 61 is provided with a gas backwashing hole, and the gas backwashing channel 61 is communicated with the air inlet 6. Due to the long-term use of the filter tank, the water distribution hole 71 of the water filter plate 7 will be blocked; first of all Connect the air pump to the air inlet 6, and then pass water to the water inlet 2. Because the air pump has a high air pressure and is equipped with water, the effect of mixing air and water can be realized, so as to avoid the blockage of the water distribution hole 71 and ensure that the water filter plate 7 Uniform water distribution; a gravel layer is laid between the filter ceramsite layer 4 and the supporting layer, which can play a certain auxiliary role in uniform water distribution during backwashing.

Example 6

The basic structure of a novel aerated biological filter of this embodiment is the same as that of Embodiment 5. The differences and improvements are: the pond body 1 is a cylinder, and the circular pond body can increase the amount of treated water; and increase the amount of activated sludge. The specific surface area of the device improves the quality of the effluent; and the device occupies a small area to solve problems such as limited site area.

The present invention and its embodiments have been schematically described above, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, and all should belong to the protection of the present invention. scope.

Claims (7)

1. A novel biological aerated filter, comprising a pool body (1) and filter filler, the bottom outer surface of the pool body (1) is provided with a water inlet (2), and the upper outer surface of the pool body (1) A water outlet (3) is provided, and it is characterized in that: the filter tank filler is a ceramsite layer (4), and the ceramsite layer (4) is horizontally laid on the support layer (5) in layers; The support layer (5) is laterally fixed and installed inside the pool body (1); the water outlet (3) and the pool body (1) above it are partially located above the ground (D), and the rest are located below the ground (D) . 2. A novel biological aerated filter tank according to claim 1, characterized in that: a water filter plate (7) is fixedly installed at the lower part of the tank body (1), and the water filter plate (7) is arranged horizontally Below the supporting layer (5). 3 . The novel biological aerated filter according to claim 2 , wherein the water filter plate ( 7 ) is in the shape of a disc, and water distribution holes ( 71 ) are evenly opened thereon. 4 . 4 . The novel biological aerated filter according to claim 3 , wherein an air inlet ( 6 ) is provided outside the tank body ( 1 ), leading to the inside of the tank body ( 1 ). 5 . 5. A novel biological aerated filter according to claim 4, characterized in that: an aeration channel (62) is arranged between the water filter plate (7) and the supporting layer (5), so The aeration channel (62) is provided with aeration holes, and the aeration channel (62) is communicated with the air inlet (6). 6. A novel biological aerated filter according to claim 5, characterized in that: a gas backwash channel (61) is provided below the water filter plate (7), and the gas backwash channel (61) A gas backflushing hole is provided on the gas backflushing channel (61), and the gas backflushing channel (61) is communicated with the air inlet (6). 7. A novel biological aerated filter according to any one of claims 1 to 6, characterized in that: the pond body (1) is a cylinder.

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