CN203845914U - Domestic sewage treatment device for teaching - Google Patents

Abstract

A domestic sewage treatment device for teaching, including a sewage regulating tank, an integrated sewage treatment device and a clear water tank; a grille is provided at the water inlet of the sewage regulating tank, and a perforated pre-aeration pipe is provided at the bottom; the integrated sewage treatment device is sequentially Including hydrolytic acidification pond, anoxic pond, anaerobic pond, aerobic biochemical pond, sedimentation pond and intermediate discharge pond; the hydrolytic acidification pond is connected with the sewage regulating pond through a lift pump; the anoxic pond is connected with the hydrolytic acidification pond; the anaerobic pond design There are high-efficiency bioelastic fillers and ABS combined perforation; the aerobic biochemical pool consists of pool body, filler, water distribution device and oxygenation and aeration system; the pool body is divided into high organic load pool and low organic load pool; the filler is elastic three-dimensional composite filler ; The oxygenation and aeration system is a microporous membrane aerator; the middle discharge tank is connected to the sedimentation tank and the clear water tank respectively. The utility model has the characteristics of simple operation, convenient management, energy saving operation, low cost, high sewage treatment efficiency and strong stability.

Description

A domestic sewage treatment device for teaching

technical field

The utility model belongs to the field of teaching supplies, in particular to the field of environment-friendly teaching supplies, in particular to a domestic sewage treatment device for teaching with simple operation, energy saving, low cost, high sewage treatment efficiency and strong stability.

Background technique

The progress and development of modern society are inseparable from water resources. We consume a lot of water resources on the earth all the time. However, the water resources on the earth are limited. How to purify and reuse the sewage generated after use is more and more important. are getting more and more attention from us.

Sewage can be divided into organic sewage, inorganic sewage and domestic sewage. For a long time, domestic sewage is generally treated by biological method, activated sludge method or artificial wetland technology.

In the biological method, domestic sewage is in contact with biofilm or anaerobic and aerobic microorganisms in activated sludge, and the organic matter in domestic sewage is removed through the growth, reproduction and metabolism of microorganisms; but the growth and reproduction of aerobic microorganisms requires the use of fans The blower provides a long-term and large amount of oxygen for it, and the operation of the fan requires a large amount of electric energy, and the noise during operation is relatively large, which is likely to cause secondary pollution to the environment.

In the activated sludge method, because the activated sludge is easy to rot and float when the temperature is high in summer, and the microbial growth is slow when the temperature is low in winter, there is a disadvantage of low efficiency in removing organic matter.

In the constructed wetland technology, plants are mainly used to absorb the organic matter in the sewage, thereby purifying the water body. However, due to the large area occupied by the constructed wetland, the sewage is easy to seep into the ground, which easily causes secondary pollution to the groundwater, and there are odorous gases during operation. discharge.

At present, many colleges and universities offer environmental majors, which involve the treatment process of domestic sewage. However, due to large domestic sewage treatment plants with large equipment and relatively scattered, the effect of students' practice is poor, and the treatment process of domestic sewage can not be well grasped. .

Therefore, it is a new development in the field of teaching equipment to develop a domestic sewage treatment device for teaching that can work in the laboratory and can be tracked and observed throughout the process. It is simple to operate, energy-saving, low in cost, high in sewage treatment efficiency, and strong in stability. topic.

Contents of the invention

In order to solve the above problems, the utility model provides a domestic sewage treatment device for teaching, which can be completed in a laboratory, has simple operation, energy saving, low cost, high sewage treatment efficiency and strong stability.

In order to achieve the above object, the utility model provides the following technical solutions:

A domestic sewage treatment device for teaching, including a sewage regulating tank, an integrated sewage treatment device and a clear water tank; a grille is provided at the water inlet of the sewage regulating tank, and a perforated pre-aeration pipe is provided at the bottom; the integrated sewage treatment device is sequentially Including anoxic pond, anaerobic pond, aerobic biochemical pond, sedimentation pond and intermediate discharge pond; the anoxic pond is connected to the sewage regulating pond through a lift pump; the anaerobic pond is equipped with high-efficiency bioelastic filler and ABS combined perforation; The pool consists of pool body, filler, water distribution device and oxygenation aeration system; the pool body is divided into high organic load pool and low organic load pool; the filler is elastic three-dimensional composite filler; the oxygenation and aeration system is microporous membrane aeration system Air device; the middle discharge tank is connected with the sedimentation tank and the clear water tank respectively.

The domestic sewage first passes through the grille at the water inlet of the sewage regulating tank to remove the floating and entangled matter in the domestic sewage, and then enters the sewage regulating tank for water volume regulation and water quality homogenization; in order to prevent suspended solids from settling in the sewage regulating tank, the The bottom of the sewage adjustment tank is provided with a perforated pre-aeration pipe, which adopts gap aeration, carries out underwater stirring, and performs air oxidation treatment on the sewage.

The utility model is equipped with an integrated sewage treatment device, which respectively includes anoxic pool, anaerobic pool, aerobic biochemical pool, sedimentation pool and intermediate discharge pool; after the domestic sewage enters the anoxic pool, it is hydrolyzed and acidified by anaerobic reaction , Change the chemical structure of macromolecular compounds to make them water-soluble small molecules, creating conditions for biological contact oxidation treatment. During this process, the domestic sewage undergoes acidification, hydrolysis and nitrification and denitrification, which reduces the concentration of ammonia nitrogen and organic matter in the domestic sewage; after that, the domestic sewage enters the anaerobic tank, where the sewage is further mixed to make full use of the high efficiency in the anaerobic tank. As a bacterial carrier, the bioelastic filler further converts the insoluble organic matter in the sewage into soluble organic matter by means of concurrent microorganisms, hydrolyzes the macromolecular organic matter into small molecular organic matter, improves the biochemical performance of the sewage, and is beneficial to the further oxidation and decomposition of the aerobic biochemical pool behind .

Subsequently, the domestic sewage enters the most core aerobic biochemical pool in sewage treatment. In the utility model, the aerobic biochemical pool is divided into a high organic load pool and a low organic load pool, and elastic three-dimensional composite fillers and microporous membrane type aeration pools are provided. Aerator; the domestic sewage in the high organic load pool, through the biochemical degradation and adsorption of a large number of different species of microbial communities attached to the elastic three-dimensional composite filler, removes various organic substances in the sewage and makes the organic substances in the sewage The content is greatly reduced; then in the low organic load pool, through the action of nitrifying bacteria, the ammonia nitrogen in the sewage is degraded under the condition of sufficient oxygen, and the COD value in the domestic sewage is also reduced to a lower level, so that the sewage can be purified ; In addition, the microporous diaphragm aerator is used in the aerobic biochemical pool, which has a rubber diaphragm with extension compensation made of imported EPDM rubber, and a better sealing performance is used between the diaphragm and the support plate. Folding structure, and an independent T-type check valve, so the stability and reliability are improved, the oxygenation capacity of the sewage is significantly enhanced, and the biochemical efficiency of the sewage is also improved.

The domestic sewage after layer-by-layer treatment finally enters the sedimentation tank. After solid-liquid separation in the sedimentation tank, the supernatant flows into the middle discharge tank, and then flows into the clear water tank.

Preferably, the high-efficiency bioelastic filler in the anaerobic tank and the filler in the aerobic biochemical tank are YJDT elastic three-dimensional fillers.

The high-efficiency biological elastic filler in the anaerobic tank and the filler in the aerobic biochemical tank in the utility model are YJDT elastic three-dimensional fillers, and YJDT elastic three-dimensional fillers have selected several types of corrosion-resistant, temperature-resistant, and Aged high-quality varieties, mixed with additives such as hydrophilic, adsorption, and heat-resistant oxygen, using special drawing and wool-making techniques, inserting the strands on the corrosion-resistant central rope to make a suspended three-dimensional elastic filler monomer. The filler can be uniformly stretched and covered in three dimensions and all directions in the effective area, so that water, air and biofilm can be fully contacted and exchanged. The biofilm can not only implant evenly on each filament, maintain good biological activity and void variability, but also obtain larger and larger specific surface area during operation, and perform good metabolism. Compared with hard briquette filler, YJDT elastic three-dimensional filler has larger gap deformation and no clogging; compared with soft filler, the material has a longer life and does not stick into agglomerates; fast. Therefore, it is better to choose YJDT elastic three-dimensional filler.

Preferably, the perforated pre-aeration pipe, ABS combined perforation and microporous membrane aerator are connected with the biochemical aeration fan.

The biochemical aeration fan adopts a three-leaf runner and a helical box, so the noise and vibration of the fan are very small; since there is no oil mixed, clean gas can be obtained, and air pollution caused by oil mist is not produced; the impeller and shaft are integral structures , and the impeller has no wear, the performance of the fan is constant, and it can run continuously for a long time; the use of special bearings has superior durability, long service life, and convenient maintenance and management; high speed and high efficiency, and compact structure and small size; therefore, biochemical exposure The air blower performs oxygenation, aeration, stirring and sludge digestion for the sewage regulating tank and the aerobic biochemical tank.

Preferably, the sedimentation tank is a vertical flow sedimentation tank, provided with a triangular weir outlet, and connected to an anoxic tank or anaerobic tank through a sludge return pump; a sludge concentration tank is also connected below the sedimentation tank.

The sedimentation tank is a vertical flow sedimentation tank, and its sludge degradation effect is good; and the triangular weir is used to discharge water, and the water discharge effect is more stable; a sludge return pump is also installed to connect with the anoxic tank or anaerobic tank, which can reduce sludge. generated; the generated sludge is discharged to the sludge thickening tank by gravity.

Compared with the existing domestic sewage treatment device for teaching, the utility model uses the biological contact oxidation method to treat the sewage, mainly uses the biofilm method, and has the characteristics of the activated sludge method; the utility model has the biological The amount is more than the activated sludge method, so the organic load is higher, the contact time is shorter, and the treatment efficiency is high, which is beneficial to reduce the volume of the treatment structure, reduce the floor area, and save infrastructure investment; there is a sludge return pump, and no sludge will occur. Expansion, easy operation and management; a large number of biofilms grow on the filler used in the utility model, which has strong adaptability to load changes, and also has certain effects under intermittent operating conditions, and has more practical significance for wastewater with uneven drainage; film hanging Bacteria cultivation is simple. Generally, the film can be hanged in 15 days, and it can be put into operation after about 20 days of domestication. Therefore, the beneficial effects of the utility model are: (1) simple operation and convenient management; (2) energy-saving operation and low cost; (3) high sewage treatment efficiency; (4) strong stability.

Description of drawings

Fig. 1, the structural representation of the utility model;

Fig. 2, the flowchart when utilizing the utility model to process domestic sewage.

List of reference signs: sewage regulating tank 1, clear water tank 2, perforated pre-aeration pipe 3, anoxic tank 4, anaerobic tank 5, aerobic biochemical tank 6, sedimentation tank 7, intermediate discharge tank 8, lift pump 9, Biochemical aeration fan 10, sludge return pump 11, sludge thickening tank 12.

Detailed ways

The technical solutions provided by the utility model will be described in detail below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the utility model and not to limit the scope of the utility model.

As shown in Figure 1, it is a structural representation of the utility model.

The utility model relates to a domestic sewage treatment device for teaching, comprising a sewage regulating pool 1, an integrated sewage treatment device and a clean water pool 2.

The water inlet of the sewage regulating tank 1 is provided with a grille, and the bottom is provided with a perforated pre-aeration pipe 3 .

The integrated sewage treatment device sequentially includes anoxic pool 4, anaerobic pool 5, aerobic biochemical pool 6, sedimentation pool 7, and intermediate discharge pool 8; anoxic pool 4 is connected to sewage regulating pool 1 through lift pump 9; anaerobic pool 5 is equipped with YJDT elastic three-dimensional filler and ABS combined perforation; aerobic biochemical pool 6 consists of pool body, filler, water distribution device and oxygen aeration system; the pool body is divided into high organic load pool and low organic load pool; the filler is YJDT Elastic three-dimensional packing; the oxygenation and aeration system is a microporous membrane aerator; the middle discharge tank 8 is connected to the sedimentation tank 7 and the clear water tank 2 respectively; among them, the sedimentation tank 7 is a vertical flow sedimentation tank with a triangular weir The water outlet is connected to the anoxic pool 4 and the anaerobic pool 5 through the sludge return pump 11; the sludge concentration pool 12 is also connected to the bottom of the sedimentation pool 7.

The perforated pre-aeration pipe 3 in the sewage regulating tank 1 , the ABS combined perforation in the anaerobic tank 5 and the microporous membrane aerator in the aerobic biochemical tank 6 are all connected to the biochemical aeration fan 10 .

Taking the treatment of domestic sewage as an example, as shown in Figure 2, it is a flow chart when utilizing the utility model to process domestic sewage:

The domestic sewage first passes through the grille at the water inlet of the sewage regulating tank 1, removes floating and entangled objects in the sewage, and then enters the sewage regulating tank 1, and performs gap aeration through the perforated pre-aeration pipe 3 installed at the bottom of the sewage regulating tank 1 Air and underwater stirring to prevent suspended solids from settling in the sewage regulating tank 1, and perform air oxidation treatment on the sewage.

After the preliminary treatment is completed, the sewage is sent to the anoxic pool 4 through the lifting pump 9, and the hydrolysis and acidification stage of the anaerobic reaction is used to change the chemical structure of the macromolecular compound in the domestic sewage to make it a water-soluble small molecule, which is a biological contact oxidation process. Deal with conditions. During this process, domestic sewage undergoes acidification hydrolysis and nitrification and denitrification to reduce the concentration of ammonia nitrogen and organic matter in domestic sewage.

The domestic sewage treated by the anoxic pool 4 enters the anaerobic pool 5, and the sewage is further mixed in the anaerobic pool 5, and the high-efficiency bioelastic filler in the anaerobic pool 5 is fully utilized as a bacterial carrier, and the sewage is further absorbed by the concurrent microorganisms. Insoluble organic matter is converted into soluble organic matter, and macromolecular organic matter is hydrolyzed into small molecular organic matter to improve the biochemical performance of sewage.

Subsequently, domestic sewage enters the aerobic biochemical pool 6, and the aerobic biochemical pool 6 is divided into a high organic load pool and a low organic load pool. The biochemical degradation and adsorption under the joint participation of microbial communities can remove various organic matter in the sewage, so that the organic matter content in the sewage is greatly reduced; then in the low organic load pool, through the action of nitrifying bacteria, it can be reduced under the condition of sufficient oxygen The ammonia nitrogen in the sewage is decomposed, and the COD value in the domestic sewage is reduced to a lower level, so that the sewage is purified; in addition, the microporous membrane aerator is used in the aerobic biochemical pool 6, and the oxygenation capacity of the sewage is significantly enhanced , so that the biochemical efficiency of sewage is also improved.

The treated domestic sewage finally enters the sedimentation tank 7, and after solid-liquid separation in the sedimentation tank 7, the supernatant flows into the middle discharge tank 8, and then flows into the clean water tank 2.

The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (4)

1. A domestic sewage treatment device for teaching, characterized in that: it includes a sewage regulating tank (1), an integrated sewage treatment device and a clear water pool (2); the water inlet of the sewage regulating tank (1) is provided with a grid There is a perforated pre-aeration pipe (3) at the bottom; the integrated sewage treatment device sequentially includes anoxic tank (4), anaerobic tank (5), aerobic biochemical tank (6), and sedimentation tank (7) And an intermediate discharge pool (8); the anoxic pool (4) is connected to the sewage regulating pool (1) through a lift pump (9); the anaerobic pool (5) is provided with high-efficiency bioelastic filler and ABS combined perforation; The aerobic biochemical pool (6) consists of a pool body, fillers, water distribution devices and an oxygenation and aeration system; the pool body is divided into a high organic load pool and a low organic load pool; the filler is an elastic three-dimensional combination filler; The oxygenation and aeration system is a microporous membrane aerator; the intermediate discharge tank (8) is connected to the sedimentation tank (7) and the clear water tank (2) respectively. 2. A domestic sewage treatment device for teaching according to claim 1, characterized in that: the high-efficiency bioelastic filler in the anaerobic tank (5) and the filler in the aerobic biochemical tank (6) are YJDT elastic Three-dimensional filler. 3. A domestic sewage treatment device for teaching according to claim 1, characterized in that: the perforated pre-aeration pipe (3), ABS combined perforation and microporous diaphragm aerator and biochemical aeration fan (10) CONNECTED. 4. A domestic sewage treatment device for teaching according to claim 1, characterized in that: the sedimentation tank (7) is a vertical flow sedimentation tank with a triangular weir outlet, and the sludge return pump ( 11) It is connected with the anoxic tank or the anaerobic tank; the sludge thickening tank (12) is also connected under the sedimentation tank (7).