CN204752314U - Lateral aeration biological filter tank structure - Google Patents

Abstract

The utility model discloses a lateral aeration biological filter structure, which comprises a filter body, and the filter body is sequentially divided into a clear water area, a filter material area and an anaerobic sludge area from top to bottom. The bottom of the mud area is provided with a water inlet sedimentation area, and a bottom sludge discharge port is provided at the bottom of the water intake sedimentation area. The side of the anaerobic sludge area is provided with a lower mud discharge port. , the water inlet is connected with an inlet pump, the upper part of the filter body is located on both sides of the clear water area, and an inner bucket container and an outer bucket container are respectively arranged, and an aeration pipe is arranged on the side of the middle part of the filter body, and the drain A suspended solids filter is set between the bottom of the oxygen sludge area and the influent sedimentation area. Two slant plates are arranged symmetrically at the bottom of the influent sedimentation area. In the mud area, part of the effluent from the clean water area returns to the anaerobic sludge area, realizing the nitrification and denitrification of the system.

Description

A lateral aeration biological filter structure

technical field

The utility model relates to a lateral aeration biological filter structure, which belongs to the technical field of environmental engineering sewage treatment.

Background technique

Biological aerated filter is a new sewage treatment process developed on the basis of ordinary biological filter in the early 1990s, referring to the water supply filter process. Initially, the filter was only used for the tertiary treatment of sewage, and then gradually developed into a For the secondary treatment device, it is a sewage treatment process with high impact load resistance, large biomass and low sludge production. Its working principle is: the reactor is filled with a filter material that can allow microorganisms to attach and grow, and the biological action of the biofilm formed on the filter material and the adsorption and interception of the film-hanging filter material are used to degrade the polluting organic matter in the sewage. Although the biological aerated filter has many advantages, such as strong impact resistance, short process flow, and low infrastructure investment, etc., in the actual use process, it still faces the following problems:

(1) Existing biological aerated filters have high requirements for influent suspended solids, and generally require pretreatment of sewage, otherwise the filter material will be easily blocked, which not only increases the complexity of the process, but also increases the risk of process application;

(2) The filter material layer needs to be backwashed regularly to remove the suspended solids in the filter layer and the shedding biofilm, and to elute the aged biofilm on the filter material; however, the traditional flushing method cannot effectively blow off Aging biofilm will eventually lead to a reduction in the capacity of the device to treat sewage;

(3) The phosphorus removal effect of the existing biological aerated filter is poor, and it needs to be supplemented by other methods for phosphorus removal; because there is no alternating anaerobic and aerobic environment in the biological aerated filter process, it is impossible to form phosphorus accumulating bacteria. Therefore, microorganisms only consume a small amount of phosphorus in the assimilation to synthesize their own substances; in order to make the total phosphorus content of the treated water meet the discharge standards allowed by the country, it is often necessary to follow up with an auxiliary phosphorus removal process, which greatly increases operating costs of the process;

(4) During the operation of the whole process, the sludge has high inorganic components, which is not conducive to subsequent utilization.

Utility model content

In order to solve the above problems, the utility model provides a lateral aerated biological filter structure. Thereby, process investment and subsequent treatment are saved, and the effluent water quality is improved.

The utility model is realized through the following technical solutions.

A lateral aerated biological filter structure, including a filter body, the filter body is divided into a clear water area, a filter material area and an anaerobic sludge area from top to bottom, and the bottom of the anaerobic sludge area is provided with In the water inlet sedimentation area, a bottom sludge outlet is provided at the bottom of the water inlet sedimentation area, and a lower mud outlet is provided on the side of the anaerobic sludge area. A water inlet is also arranged on the water inlet sedimentation area, and the water inlet A water inlet pump is connected, and the upper part of the filter body is located on both sides of the clean water area, and an inner bucket container and an outer bucket container are respectively arranged.

An aeration pipe is arranged on the side of the middle part of the filter body, and the aeration pipe is connected to the clean water area through a backwash pump.

A suspended solids filter is set between the bottom of the anaerobic sludge zone and the influent sedimentation zone.

Two inclined plates are arranged symmetrically at the bottom of the water inlet and sedimentation area, and both inclined plates are inclined to the middle by 10°.

A filter material supporting net is arranged between the filter material area and the anaerobic sludge area.

A filter material blocking net is arranged between the filter material area and the clean water area.

The anaerobic sludge area is also communicated with the aeration pipe through the return pipe.

The beneficial effects of the utility model are:

Compared with the prior art, the utility model sets a water inlet sedimentation area at the bottom, and at the same time, the bottom of the sedimentation area is provided with two 10° sloping plates inclined to the middle, such a design can effectively control the water inlet The water quality is settled, so that the suspended solids and some inorganic substances in the influent can effectively flocculate and settle, and are discharged through the bottom mud discharge port. At the same time, the water inlet adopts distributed multi-point downward water inlet, which can effectively and evenly distribute water to the entire reactor, so that the suspended matter in the water can be fully flocculated and settled. Since an anaerobic sludge area is set in the middle and lower part of the entire filter, part of the effluent from the clear water area flows back to the anaerobic sludge area, realizing the nitrification and denitrification of the system. The sludge outlet in the anaerobic sludge area can effectively remove part of the sludge and achieve the purpose of phosphorus removal. At the same time, the processing capacity of the filter is greatly improved.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-influent sedimentation area, 2-anaerobic sludge area, 3-filter body, 4-filter material area, 5-aeration pipe, 6-clear water area, 7-filter material barrier net, 8- Filter support net, 9-suspended solids filter, 10-inlet pump, 11-backwash pump, 12-return pipe, 13-slope plate, 14-bottom mud outlet, 15-lower mud outlet, 16- Inner bucket container, 17-outer bucket container, 18-water inlet.

Detailed ways

The technical solution of the utility model is further described below in conjunction with the accompanying drawings, but the scope of protection is not limited to the description.

As shown in Figure 1, a kind of lateral aerated biological filter structure described in the utility model includes a filter body 3, and the filter body 3 is divided into a clear water area 6, a filter material area 4 and Anaerobic sludge area 2, the bottom of the anaerobic sludge area 2 is provided with an inflow sedimentation area 1, and a bottom sludge outlet 14 is provided at the bottom of the water inflow sedimentation area 1, and the side of the anaerobic sludge area 2 is provided with The lower part of the mud discharge port 15, the water inlet and sedimentation area 1 is also provided with a water inlet 18, the water inlet 18 is connected to the water inlet pump 10, and the upper part of the filter body 3 is respectively provided with inner buckets on both sides of the clear water area 6 Type container 16 and outer bucket type container 17. Both the inner bucket container 16 and the outer bucket container 17 adopt a flow-through water inlet, wherein the inner bucket container 16 is used for secondary settlement and sludge discharge, which effectively improves the effluent water quality of the entire reactor. The bucket container 17 is used for the water outlet of the whole system. In this technical solution, an inlet sedimentation zone is set at the bottom of the filter body 3, so that the suspended solids and some inorganic substances in the inlet water can be effectively flocculated and settled, and discharged through the bottom mud discharge port 14. At the same time, the water inlet method is multi-point downward water inlet, which can effectively and evenly distribute water to the entire reactor, so that the suspended matter in the water can be fully flocculated and settled.

An aeration pipe 5 is arranged on the side of the middle part of the filter body 3 , and the aeration pipe is connected to the clean water area 6 through a backwash pump 11 . In this way, the hedging operation method can not only effectively distribute oxygen in the filter material area 4, but also the lateral hedging design can allow the whole device to effectively blow off the aged biomass during the backwashing stage, so that the whole system has Good biological treatment effect.

A suspended solids filter 9 is provided between the bottom of the anaerobic sludge zone 2 and the influent sedimentation zone 1 . Effectively played a role in intercepting suspended solids.

Two sloping plates 13 are arranged symmetrically at the bottom of the water inflow sedimentation area 1, and both sloping plates 13 are inclined 10° towards the middle. Such a design can effectively settle the water quality of the influent, so that the suspended solids and some inorganic substances in the influent can be effectively flocculated and settled, and can be better discharged through the mud discharge port 14 at the bottom.

A filter material supporting net 8 is arranged between the filter material area 4 and the anaerobic sludge area 2 .

A filter material blocking net 7 is arranged between the filter material area 4 and the clean water area 6 .

The anaerobic sludge zone 2 is also communicated with the aeration pipe 5 through the return pipe 12 .

As shown in Figure 1, the working principle of the present utility model is: the water inlet of the whole filter is arranged at the bottom of the filter body 3, and when working, enters the water inlet sedimentation zone 1 through the downward distributed water inlet, and after fully After the flocculation and settlement, due to the pressure of the water inlet pump 10, the sewage passes through the whole filter tank from bottom to top. In the anaerobic sludge area, the sewage is anaerobically treated under the action of anaerobic sludge, and the sludge is regularly discharged through each sludge outlet to achieve the purpose of phosphorus removal. At the same time, due to the action of the backwash pump 11, part of the treated effluent flows back to the anaerobic sludge area through the return pipe 12, so as to realize the nitrification and denitrification of the whole system. In the filter area 4, under the action of the aeration pipe 5, the whole system realizes the aerobic treatment of the sewage and removes the organic matters in the water. The entire filter tank is designed with a filter material supporting net 8 and a filter material blocking net 7, which can effectively retain the carrier quantity in the filter material area, so that the carrier will not be lost. Two bucket containers are designed on both sides of the clear water zone 6 at the top of the filter, both of which adopt over-flow water inlet. The first bucket container is used for secondary settlement and sludge discharge, which effectively improves the effluent water quality of the entire reactor. The outermost bucket container is used for the effluent of this system.

Claims (7)

1. A lateral aerated biological filter structure, characterized in that: it includes a filter body (3), and the filter body (3) is divided into a clear water area (6) and a filter material area (4) from top to bottom. ) and the anaerobic sludge zone (2), the bottom of the anaerobic sludge zone (2) is provided with an influent sedimentation zone (1), and the bottom of the influent sedimentation zone (1) is provided with a bottom sludge outlet (14) , the side of the anaerobic sludge zone (2) is provided with a lower sludge outlet (15), and the water inlet and sedimentation zone (1) is also provided with a water inlet (18), and the water inlet (18) is connected with The water inlet pump (10), the upper part of the filter body (3) is located on both sides of the clear water area (6) and is respectively provided with an inner bucket container (16) and an outer bucket container (17). 2. A lateral aerated biological filter structure according to claim 1, characterized in that: an aeration pipe (5) is arranged on the side of the middle part of the filter body (3), and the aeration pipe is backwashed The pump (11) links to each other with the clear water area (6). 3. A lateral aerated biological filter structure according to claim 1, characterized in that: a suspended matter filter is provided between the bottom of the anaerobic sludge zone (2) and the influent sedimentation zone (1). net (9). 4. A lateral biological aerated filter structure according to claim 1, characterized in that two inclined plates (13) are arranged symmetrically at the bottom of the water inlet and sedimentation area (1), and the two inclined plates (13) all incline 10 ° to the middle. 5. A lateral aerated biological filter structure according to claim 1, characterized in that: a filter material supporting net is arranged between the filter material area (4) and the anaerobic sludge area (2) (8). 6 . A lateral aerated biological filter structure according to claim 1 , characterized in that: a filter blocking net ( 7 ) is set between the filter material area ( 4 ) and the clean water area ( 6 ). 7. A lateral biological aerated filter structure according to claim 1, characterized in that: the anaerobic sludge zone (2) is also communicated with the aeration pipe (5) through the return pipe (12).