CN211770829U - School domestic sewage treatment device - Google Patents

Abstract

The utility model provides a school's domestic sewage's processing apparatus, including grid pond and fan, the upper reaches domestic sewage pipe that the grid pond can communicate, its intercommunication low reaches equalizing basin, the hydrolysis acidification pond in equalizing basin intercommunication low reaches, the contact oxidation pond in hydrolysis acidification pond intercommunication low reaches, the sedimentation tank in contact oxidation pond intercommunication low reaches, the disinfection pond in sedimentation tank intercommunication low reaches, sludge thickening pond, all processing ponds are all located the underground, the three play tuber pipe of fan intercommunication, three play tuber pipe communicates the equalizing basin respectively, the hydrolysis acidification pond, the contact oxidation pond, be equipped with the sterilizer in the disinfection pond. Compared with the prior art, the technical effect of the utility model is that, the utility model discloses an all processing unit that will all establish underground, but afforest behind the earthing, both practice thrift the land of school and can afforest again and beautify the environment, can not cause the influence to the surrounding environment.

Description

School domestic sewage treatment device

Technical Field

The utility model relates to a school's domestic sewage's processing apparatus.

Background

The school domestic sewage has complex sources and components, contains pathogenic microorganisms, toxic and harmful physicochemical pollutants, radioactive pollution and the like, has the characteristics of space pollution, acute infection, latent infection and the like, and can become an important path for spreading epidemic diseases and seriously pollute the environment without effective treatment. The technology applied to the treatment of the domestic sewage in schools is quite mature, and the technology is mainly as follows in recent years:

1. MBR membrane bioreactor

The membrane bioreactor is a novel water treatment technology combining a high-efficiency membrane separation technology and an activated sludge method. Active sludge and macromolecular organic substances in a biochemical reaction tank are effectively retained by using membrane separation equipment immersed in an aerobic biological tank, and clear water meeting the discharge standard is separated out through negative pressure. The effluent quality after MBR treatment is relatively clear, and the method is suitable for high-standard treatment. But the investment cost of the membrane component is higher, the membrane component needs to be cleaned regularly, the requirement on the quality of operation and maintenance personnel is higher, and the power cost is higher.

2. SBR biochemical method

SBR biochemical method is a sequencing batch activated sludge method, also known as intermittent activated sludge method. Compared with a continuous activated sludge method, the SBR system has simple composition, integrates an aeration tank and a secondary sedimentation tank into a whole, utilizes activated sludge in a single reaction tank to complete biological treatment and solid-liquid separation of sewage, and is not provided with sludge backflow equipment; the volume of the aeration tank is smaller than that of a continuous type, and the construction cost and the operation cost are both lower; the sludge is easy to precipitate, and the sludge expansion is not generated under the ordinary condition; the maintenance and management are easy; through the adjustment of the operation mode, the nitrogen and phosphorus removal effect can be realized for sewage with lower nitrogen and phosphorus content in a single tank. The operation condition of the device is mainly characterized by intermittent operation, and the device operates in a sequential and intermittent mode in space and time. The whole operation is carried out in the same pond area.

However, the SBR process requires a certain water level difference in the tank for sewage to be discharged by gravity, so that the utilization rate of the volume of the sewage tank is reduced, and thus, the use of the SBR process increases the engineering investment and is not favorable for cost control.

3. Contact oxidation process

The biological contact oxidation method is a biological treatment method for waste water derived from a biological membrane method, namely a certain amount of filler is filled in a biological contact oxidation pond, and organic matters in the waste water are oxidized and decomposed by utilizing a biological membrane attached to the filler and fully supplied oxygen through biological oxidation so as to achieve the aim of purification.

The biological contact oxidation method is a high-efficiency water treatment process for purifying organic wastewater by mainly using a biological film attached to a carrier (commonly called as a filler). The biomembrane process has the characteristics of the activated sludge process and has the advantages of both the activated sludge process and the biomembrane process. The process has the characteristics of high efficiency, energy conservation, impact load resistance, convenient operation management and the like, and is widely applied to sewage treatment systems in various industries. However, the conventional contact oxidation method has many processing units, and thus requires a plurality of structures. For schools, the places are mostly in urban areas, the sewage treatment site is limited, and the sewage treatment system is easy to affect the surrounding environment.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem who solves: in practice, aiming at the advantages of the investment and the process of the contact oxidation method and the limitation of the school domestic sewage treatment on the site, how to design the buried integrated contact oxidation treatment device for the school domestic sewage is to solve the problem of difficult school domestic sewage treatment.

The technical scheme of the utility model specifically does:

the utility model provides a school's domestic sewage's processing apparatus, including grid pond and fan, the upper reaches domestic sewage pipe that the grid pond can communicate, its intercommunication low reaches equalizing basin, the hydrolysis acidification pond in equalizing basin intercommunication low reaches, the contact oxidation pond in hydrolysis acidification pond intercommunication low reaches, the sedimentation tank in contact oxidation pond intercommunication low reaches, the disinfection pond in sedimentation tank intercommunication low reaches, sludge thickening pond, all processing ponds are all located the underground, the three play tuber pipe of fan intercommunication, three play tuber pipe communicates the equalizing basin respectively, the hydrolysis acidification pond, the contact oxidation pond, be equipped with the sterilizer in the disinfection pond.

The contact oxidation tank is communicated with the hydrolysis acidification tank through a mixed liquid return pipe.

Pumps are arranged between the adjusting tank and the hydrolysis acidification tank, between the sedimentation tank and the sludge concentration tank and at the upstream of the mixed liquid return pipe.

Compared with the prior art, the technical effect of the utility model is that, the utility model discloses an all processing unit that will all establish underground, but afforest behind the earthing, both practice thrift the land of school and can afforest again and beautify the environment, can not cause the influence to the surrounding environment.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Detailed Description

Referring to fig. 1, a treatment device for school domestic sewage comprises a grating tank 1 and a fan 8, wherein the grating tank 1 can be communicated with an upstream domestic sewage pipe which is communicated with a downstream adjusting tank 2, the adjusting tank 2 is communicated with a downstream hydrolysis and acidification tank 3, the hydrolysis and acidification tank 3 is communicated with a downstream contact oxidation tank 4, the contact oxidation tank 4 is communicated with a downstream sedimentation tank 5, and the sedimentation tank 5 is communicated with a downstream disinfection tank 6 and a sludge concentration tank 7.

A sterilizing machine 61 is arranged in the sterilizing tank 6.

All the treatment tanks (including a grating tank 1, a regulating tank 2, a hydrolysis acidification tank 3, a contact oxidation tank 4, a sedimentation tank 5, a disinfection tank 6 and a sludge concentration tank 7) are all arranged underground.

The fan 8 is communicated with three air outlet pipes 81, and the three air outlet pipes 81 are respectively communicated with the adjusting tank 2, the hydrolysis acidification tank 3 and the contact oxidation tank 4.

In order to save materials, the contact oxidation tank 4 is communicated with the hydrolysis acidification tank 3 through a mixed liquid return pipe 41.

In order to improve the efficiency, pumps 9 are arranged between the adjusting tank 2 and the hydrolysis acidification tank 3, between the sedimentation tank 5 and the sludge concentration tank 7 and at the upstream of the mixed liquid return pipe 41.

In order to save materials, the sludge concentration tank 7 is communicated with the adjusting tank 2.

The working principle is as follows:

school's domestic sewage at first gets into the septic tank, and large granule suspended impurity is held back, carries out the mud-water separation of degree of depth simultaneously, then separates through the grid in grid pond and removes partly thick suspended solid after, and the flow automatically gets into the equalizing basin, and the effect of equalizing basin is regulating pondage, balanced quality of water, avoids the quality of water of outburst, the water yield fluctuation to produce the impact to follow-up unit. Meanwhile, a pre-aeration facility is additionally arranged in the pool, so that harmful gas in the sewage is prevented from accumulating, the harm is caused to microorganisms in the subsequent unit treatment, and the biodegradability of the sewage is further improved.

The effluent of the regulating reservoir is lifted by a pump to enter a hydrolysis acidification pool, and suspended biological fillers are filled in the hydrolysis acidification pool to improve the microbial biomass in the pool.

The effluent of the hydrolysis tank automatically flows into a contact oxidation treatment tank. In the contact oxidation pond, organic pollutants in the sewage are in contact with sludge and a biological membrane, in an aerobic environment, a large amount of pollutants in the sewage are adsorbed and degraded by microorganisms (sludge) to carry out metabolism, so that the water quality is purified, ammonia nitrogen in the sewage is nitrified by nitrifying bacteria, and the phosphorus accumulating bacteria carry out a large amount of phosphorus accumulation and then carry out sludge discharge in a subsequent stage to realize biological phosphorus removal. Wastewater treated by contact oxidation automatically flows into a sedimentation tank, sludge in the sedimentation tank is precipitated under the action of gravity, and supernatant automatically flows into an intermediate water tank, then passes through a filtering device (an activated carbon quartz sand filtering device) and finally flows into a contact disinfection tank.

In the disinfection tank, the disinfectant produced by the disinfection machine is utilized for disinfection (the contact disinfection time is more than 1.0 hour), so that escherichia coli and viral bacteria in the wastewater are killed. After disinfection, the wastewater is discharged after reaching the standard.

And one part of the residual sludge in the system is returned to the regulating tank according to the process requirements to be used as a raw material, the other part of the residual sludge is discharged into a sludge concentration tank by a sludge pump to be concentrated, and the sludge is treated by concentration and disinfection and then is transported outside by a pump truck.

The effect of this patent does:

1. the process has good effect, stability and reliability, the main treatment process is a contact oxidation method, the operation process is continuous aeration and drainage, and the process has good denitrification function.

2. The process is simplified. The process only comprises regulation, hydrolytic acidification, contact oxidation, a filtering device and disinfection, and has the advantages of less equipment and facilities, simple and convenient operation, less manual operation amount and only 1 person per shift.

3. The operation cost is low, the treatment process is a pure biochemical process, and only electric power is consumed, so that the operation cost is greatly reduced. In actual operation, the operation parameters can be flexibly adjusted according to the change of water quality and water quantity, the optimal treatment effect is achieved, the standard discharge is ensured, and the consumed energy is minimum.

4. All the processing units are arranged underground, and can be afforested after being covered with soil, thereby not only saving the land for schools, but also greening and beautifying the environment, and not influencing the surrounding environment.

See the prior art for additional details.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the general inventive concept, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims (4)

1. The utility model provides a school's domestic sewage's processing apparatus, includes grid pond (1) and fan (8), its characterized in that: grid pond (1) upper reaches sanitary sewer pipe that can communicate, its intercommunication low reaches equalizing basin (2), equalizing basin (2) intercommunication low reaches hydrolysis-acidification pond (3), hydrolysis-acidification pond (3) intercommunication low reaches contact oxidation pond (4), contact oxidation pond (4) intercommunication low reaches sedimentation tank (5), sedimentation tank (5) intercommunication low reaches disinfection pond (6), sludge thickening pond (7), all treatment ponds all are located the underground, fan (8) communicate three play tuber pipe (81), three play tuber pipe (81) communicate equalizing basin (2) respectively, hydrolysis-acidification pond (3), contact oxidation pond (4), be equipped with sterilizer (61) in disinfection pond (6).

2. The school sewage treatment device according to claim 1, wherein: the contact oxidation tank (4) is communicated with the hydrolysis acidification tank (3) through a mixed liquid return pipe (41).

3. The school sewage treatment device according to claim 1, wherein: pumps (9) are arranged between the adjusting tank (2) and the hydrolysis acidification tank (3), between the sedimentation tank (5) and the sludge concentration tank (7) and at the upstream of the mixed liquid return pipe (41).

4. The school sewage treatment device according to claim 1, wherein: the sedimentation tank (5) is communicated with the adjusting tank (2).

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