CN214936793U

CN214936793U - Little sewage treatment device

Info

Publication number: CN214936793U
Application number: CN202023013728.8U
Authority: CN
Inventors: 陈小容; 周晓曦; 朱亚敏
Original assignee: Sichuan Xingao Environmental Technology Service Co ltd
Current assignee: Sichuan Xingao Environmental Technology Service Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-11-30
Anticipated expiration: 2030-12-15

Abstract

The utility model relates to a small and micro sewage treatment device, which comprises a water inlet pipe 1, wherein the water inlet pipe 1 is connected with the upper end of a collecting pipe network 2, the lower end of the collecting pipe network 2 is connected with the upper part of a grid well 3, the lower part of the grid well 3 is connected with an adjusting tank 4, a sewage submerging lifting pump 5 is arranged in the adjusting tank 4, and the sewage submerging lifting pump 5 is connected with one side of a DC-MBBR-BAF device 7 through a pipeline; the other side of the DC-MBBR-BAF equipment 7 is connected with one side of an ultraviolet sterilizer 8 through a pipeline, and the other side of the ultraviolet sterilizer 8 is connected with a water outlet pipe 9; and a sludge tank 6 is arranged on one side of the grating well 3 and one side of the adjusting tank 4. The DC-MBBR-BAF equipment 7 is utilized to overcome the defects of the traditional wastewater treatment, the treatment efficiency is improved, the treatment cost is reduced, the service life of the equipment is prolonged, the operation process is simple and convenient, no chemical agent is used, and the method is friendly to the environment and workers.

Description

Little sewage treatment device

Technical Field

The utility model relates to a sewage treatment device, in particular to a small and micro sewage treatment device.

Background

In the prior art, the traditional activated sludge process is the most widely applied urban domestic sewage treatment process at present, firstly, domestic sewage is subjected to pipe network collection of a grating well to remove large suspended matters, floating matters, fiber substances and solid particle substances, then the domestic sewage enters an anoxic tank to undergo denitrification and denitrification biochemical reaction, and meanwhile, part of organic pollutants are degraded, effluent of the anoxic tank enters an aerobic digestion tank to undergo aerobic decarbonization and nitrification reaction to remove ammonia nitrogen and organic pollutants, effluent of the aerobic tank enters a sedimentation tank to undergo mud-water separation, supernatant automatically flows to a disinfection tank, is subjected to disinfection treatment by adding disinfectants such as sodium hypochlorite and the like, and then reaches the standard and is discharged outside.

The process mostly adopts a separately built gravity type sedimentation tank as a means for solid-liquid separation of activated sludge mixed liquor, not only occupies large area, but also has other problems that firstly, the volume load of a treatment device is low, the oxygen transfer efficiency is low and the energy consumption is high because the solid-liquid separation efficiency of the sedimentation tank is not high and the sludge concentration in an aeration tank is difficult to maintain at a high level; secondly, the quality of treated effluent is not ideal enough and stable enough, and the requirement of continuously improved discharge standard is difficult to meet; the excess sludge yield is large, and the sludge treatment cost is high; fourthly, the management and operation are complex, and the maintenance cost is high.

Because the suspended biochemical sludge in the mixed liquor is mainly used for treatment in the anoxic tank and the aerobic tank, when the water quality and the water quantity of the incoming water fluctuate greatly, the suspended activated sludge is easily impacted by load, so that the sludge activity is reduced, the settleability is poor, and the sludge and the water can not be well separated during sedimentation, so that the sludge flows outwards, and the water quality of the outgoing water is obviously poor; in addition, the treatment needs a long time to recover to the original treatment level; with the improvement of national and local sewage discharge standards, the process is difficult to meet the latest requirements of national external drainage COD, ammonia nitrogen, total nitrogen and total phosphorus; because the automation degree of the system is low, a specially-assigned person is needed to watch; since the system has a low processing load, the system tends to occupy a large area.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a small and micro sewage treatment device; the utility model makes full use of the relevant functions of the DC-MBBR-BAF biofilm reactor, makes full use of the advantages of the activated sludge process, and overcomes the defects of the traditional activated sludge process and the fixed biofilm process; the MBBR breaks through the limitation of the traditional biomembrane method.

The purpose of the utility model is realized through the following technical scheme: a small and micro sewage treatment device; the device comprises a water inlet pipe, wherein the water inlet pipe is connected with the upper end of a collection pipe network, the lower end of the collection pipe network is connected with the upper part of a grid well, the lower part of the grid well is connected with an adjusting tank, a sewage submerging lift pump is arranged in the adjusting tank, and the sewage submerging lift pump is connected with one side of a DC-MBBR-BAF device through a pipeline; the other side of the DC-MBBR-BAF equipment is connected with one side of an ultraviolet sterilizer through a pipeline, and the other side of the ultraviolet sterilizer is connected with a water outlet pipe; and a sludge tank is arranged on one side of the grating well and one side of the adjusting tank.

The key point of the DC-MBBR-BAF biofilm reactor lies in researching and developing the biological filler which has the specific gravity close to that of water and is easy to move freely with the water under slight stirring. The biological filler has the characteristics of large effective surface area and suitability for the adsorption and growth of microorganisms. The structure of the packing is characterized by having a protected internal surface area available for microbial growth. When aeration and oxygenation are carried out, the rising buoyancy of the air bubbles pushes the filler and the surrounding water body to flow, and when air flow passes through the gap between the water flow and the filler, the air flow is blocked by the filler and is divided into small bubbles. In such a process, the filler is sufficiently agitated and mixed with the water stream, and the air stream is sufficiently divided into fine bubbles, increasing the contact of the biofilm with oxygen and the efficiency of oxygen transfer. Under the anaerobic condition, the water flow and the filler flow sufficiently under the action of the submersible stirrer, so that the aim of biological decomposition is fulfilled when the biological membrane is in sufficient contact with the treated pollutants. Thus, the structure of the filler is characterized by having a protected internal surface area available for microbial growth. The MBBR breaks through the limitations of the traditional biomembrane method (the blockage and the uneven water distribution of the fixed bed biomembrane process and the fluidization limitation of the biological fluidized bed process), and lays a good foundation for the biomembrane method to be more widely applied to the biological treatment of the sewage.

The utility model has the advantages of it is following:

1. high volume load, compact and save land: the volume loading depends on the effective specific surface area of the biological filler. The specific surface areas of different fillers vary widely. The specific surface area of the filler can be varied from 200 m/m to 1200 m/m of filler volume to suit different pretreatment requirements and applications.

2. Impact resistance is strong, the performance is stable, and the operation is reliable: impact loads and temperature changes have much less impact on the fluidized bed process than the activated sludge process. When the sewage composition changes or the sewage toxicity increases, the biological membrane has strong tolerance to the change.

3. The aeration system is convenient to operate and simple to maintain: the aeration system adopts a perforated aeration pipe system, is not easy to block and is easy to maintain and manage.

4. The biological pond is not blocked, and the volume of the biological pond is fully utilized without dead angles: the filler and the water flow can be mixed in the whole volume of the biological tank, so that the possibility of blockage of the biological tank is fundamentally eliminated, and the tank volume is completely utilized.

5. Flexible and convenient: the flexibility of the process is in two ways. On one hand, various pool types (depth square and circle) can be adopted without influencing the treatment effect of the process. On the other hand, different filling rates of the fillers can be flexibly selected, and the requirements of high efficiency and long-term expansion of treatment scale without increasing the tank capacity are met.

6. The service life is long: the high-quality durable biological filler, the aeration system and the water outlet device can ensure that the whole system can be used for a long time without replacement, and the depreciation rate is lower.

7. Biological phosphorus removal and adsorption phosphorus removal are combined, and no chemical agent is consumed.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure: 1-water inlet pipe, 2-collection pipe network, 3-grid well, 4-adjusting tank, 5-submerged sewage lift pump, 6-sludge tank, 7-DC-MBBR-BAF equipment, 8-ultraviolet sterilizer and 9-water outlet pipe.

Detailed Description

The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description.

As shown in fig. 1, the small and micro sewage treatment equipment comprises a water inlet pipe 1, wherein the water inlet pipe 1 is connected with the upper end of a collecting pipe network 2, the lower end of the collecting pipe network 2 is connected with the upper part of a grid well 3, the lower part of the grid well 3 is connected with an adjusting tank 4, a sewage submerging lifting pump 5 is arranged in the adjusting tank 4, and the sewage submerging lifting pump 5 is connected with one side of a DC-MBBR-BAF (direct current-moving bed biological reactor) equipment 7 through a pipeline; the other side of the DC-MBBR-BAF device 7 is connected with one side of an ultraviolet sterilizer 8 through a pipeline, and the other side of the ultraviolet sterilizer 8 is connected with a water outlet pipe 9.

And a sludge tank 6 is arranged on one side of the grating well 3 and one side of the adjusting tank 4.

The working process of the utility model is as follows: sewage flows through a collecting pipe network 2 from a water inlet pipe 1, then automatically flows into a grid well 3, is separated by a grid in the grid well 3 to remove solid matters or other insoluble impurities, and then flows into a sewage adjusting tank 4 after being treated by the grid well 3. After the water quality and the water quantity of the sewage after the primary treatment are adjusted in the adjusting tank 4, the sewage is pumped into the integrated DC-MBBR-BAF reactor by the sewage submerging lifting pump 5, the wastewater after the biochemical treatment flows through the ultraviolet sterilizer 8 for sterilization after a series of biochemical reactions, and the sewage after the sterilization is qualified after inspection and is discharged through the water outlet pipe 9.

Claims

1. The utility model provides a little sewage treatment device which characterized in that: the device comprises a water inlet pipe (1), wherein the water inlet pipe (1) is connected with the upper end of a collecting pipe network (2), the lower end of the collecting pipe network (2) is connected with the upper part of a grid well (3), the lower part of the grid well (3) is connected with an adjusting tank (4), a sewage submerging lifting pump (5) is arranged in the adjusting tank (4), and the sewage submerging lifting pump (5) is connected with one side of a DC-MBBR-BAF device (7) through a pipeline; the other side of the DC-MBBR-BAF equipment (7) is connected with one side of an ultraviolet sterilizer (8) through a pipeline, and the other side of the ultraviolet sterilizer (8) is connected with a water outlet pipe (9).

2. The micro sewage treatment apparatus according to claim 1, wherein: and a sludge tank (6) is arranged on the same side of the grating well (3) and the regulating tank (4).