Distributed sewage treatment system

Abstract

The utility model discloses a distributed sewage treatment system, which relates to the technical field of sewage treatment and comprises an adjusting tank, a biological filter and an artificial wetland, a water outlet of the adjusting tank is connected with a water inlet of a settling zone of the biological filter through a pipeline, and a water outlet of the biological filter is connected with the surface of a plant layer on the constructed wetland through a pipeline; the sewage treatment system has the advantages that sewage is firstly regulated by the regulating tank, and is filtered by the biological filter in a plurality of areas, finally obtained three-time filtered water basically reaches the standard, and the sewage is further treated and degraded by the constructed wetland, so that the stable and qualified water quality of the sewage is obtained. The whole sewage treatment process does not need backwashing and even supplement of strains, meanwhile, the cost is reduced, and the treated sewage can meet the discharge standard.

Description

Technical field:

[0001] The utility model relates to the technical field of sewage treatment, in particular to a decentralized sewage treatment system. Background technology:

[0002] With the improvement of people's living standards, people now pay more and more attention to landscape greening projects. The sewage generated in landscape gardens is mainly domestic sewage, which contains a large amount of organic matter and bacteria, which has certain hazards.

[0003] The existing problems are: currently domestic sewage treatment is mainly based on contact oxidation, A / O, etc. Common treatment equipment requires backwashing and even additional bacteria. The operating cost is relatively high, the sewage treatment capacity is general, and the water quality of the effluent is unstable. Utility model content:

[0004] The purpose of the utility model is to provide a decentralized sewage treatment system to solve the problems raised in the above background technology.

[0005] The utility model is implemented by the following technical solutions:

[0006] A decentralized sewage treatment system comprises a regulating tank, a biological filter and an artificial wetland; the water outlet of the regulating tank is connected to the water inlet of the sedimentation zone of the biological filter through a pipeline, and the drainage outlet of the biological filter is connected to the surface of the plant layer on the artificial wetland through a pipeline;

[0007] The biofilter comprises: a tank body, a sedimentation zone, a pretreatment zone, an aerobic zone and a deep filtration zone; the tank body is provided with baffles to form the sedimentation zone, the pretreatment zone, the aerobic zone and the deep filtration zone; a sewage pump is installed at the bottom of the sedimentation zone, a first filler layer is arranged in the pretreatment zone, a second filler layer is arranged in the aerobic zone, an aeration pipe is installed at the bottom of the aerobic zone, a plurality of aerators are evenly arranged on the aeration pipe, an air inlet end of the aeration pipe is connected to an air outlet end of a fan; a third filler layer is arranged in the deep filtration zone.

[0008] Preferably, the main filler of the first filler layer is ceramsite filler.

[0009] Preferably, the main filler of the second filler layer is a mixture of volcanic rock biological filler and bamboo charcoal filler.

[0010] Preferably, the third filler layer is mainly filled with activated carbon.

[0011] The advantages of this utility model are as follows: the sewage is first regulated and treated in a regulating tank, and then filtered in multiple zones in a biological filter tank. The final three filtered water basically meets the standards, and after further treatment and degradation in an artificial wetland, the sewage is stabilized and has qualified water quality. The entire sewage treatment process does not require backwashing or even the addition of bacteria, which reduces costs and meets the discharge standards after sewage treatment. Description of the drawings:

[0012] Figure 1 It is a schematic diagram of the main structure of the utility model;

[0013] Figure 2 It is the structural diagram of the biological filter;

[0014] Figure 3 Schematic diagram of the structure of artificial wetland.

[0015] In the figure: 1. regulating tank, 2. biological filter, 2.1. tank body, 2.2. sedimentation zone, 2.3. pretreatment zone, 2.4. aerobic zone, 2.5. deep filtration zone, 2.6. sewage pump, 2.7. first packing layer, 2.8. second packing layer, 2.9. aeration pipe, 2.10. aerator, 2.11. fan, 2.12. third packing layer, 3. artificial wetland. Specific implementation method:

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3 , the utility model provides a technical solution for a decentralized sewage treatment system:

[0018] A decentralized sewage treatment system comprises a regulating tank 1, a biological filter 2 and an artificial wetland 3; the water outlet of the regulating tank 1 is connected to the water inlet of a sedimentation zone 2.2 of the biological filter 2 through a pipeline, and the drainage outlet of the biological filter 2 is connected to the surface of a plant layer on the artificial wetland 3 through a pipeline; the sewage is first regulated and treated by the regulating tank 1, and then filtered in multiple zones by the biological filter 2, and finally the tertiary filtered water basically meets the standard, and after further treatment and degradation in the artificial wetland 3, the sewage obtains stable qualified water quality.

[0019] The biofilter 2 comprises: a tank body 2.1, a sedimentation zone 2.2, a pretreatment zone 2.3, an aerobic zone 2.4 and a deep filtration zone 2.5; the sedimentation zone 2.2, the pretreatment zone 2.3, the aerobic zone 2.4 and the deep filtration zone 2.5 are formed by arranging a baffle 4 in the tank body 2.1; the baffle 4 serves to guide and control the flow of the fluid to reduce eddy currents and turbulences of the fluid in the pipeline or equipment, thereby improving the efficiency and performance of the system. A sewage pump 2.6 is installed at the bottom of the sedimentation zone 2.2 for extracting the sludge deposited in the sedimentation zone 2.2; a first packing layer 2.7 is provided in the pretreatment zone 2.3, a second packing layer 2.8 is provided in the aerobic zone 2.4, an aeration pipe 2.9 is installed at the bottom of the aerobic zone 2.4, and a plurality of aerators 2.10 are evenly arranged on the aeration pipe 2.9 to increase the oxygen inside the aerobic zone 2.4, so that the microorganisms in the aerobic zone 2.4 reproduce rapidly and improve the connection between the air inlet end of the aeration pipe 2.9 and the air outlet end of the fan 2.11; a third packing layer 2.12 is provided in the deep filtration zone 2.5.

[0020] The first packing layer 2.7 is mainly filled with ceramsite filler; ceramsite has high micropores and porosity, and has a large surface area, which can effectively adsorb various chemical substances, organic substances, heavy metal ions and impurities in the water, thereby removing harmful substances in the water. At the same time, ceramsite can act as a catalyst to guide the decomposition of organic substances in the water and inhibit the redox reaction of organic substances in the water. In this way, the redox system on the surface of the ceramsite is formed, making the oxidation reaction of organic substances easier, thereby increasing the dissolved oxygen content and the oxygen content in the water.

[0021] The second filler layer 2.8 is mainly filled with volcanic rock biological filler (suitable for microorganisms to grow and reproduce on its surface to form biofilm) and bamboo charcoal filler (high porosity, very suitable as a carrier of soil microorganisms and organic nutrients, can enhance soil vitality, and is a good soil improvement material; since the carbon itself has countless pores, this carbon pore can effectively absorb part of the floating matter in the air, and has the effect of absorbing, decomposing odor and deodorizing harmful chemicals such as sulfide, hydride, methanol, benzene, phenol, etc.).

[0022] The third filler layer 2.12 is mainly filled with activated carbon.

[0023] The working principle is as follows: the sewage is first regulated by the regulating tank 1, and the regulated sewage enters the sedimentation area 2.2 for sedimentation treatment, and the supernatant of the sedimentation area 2.2 enters the pretreatment area 2.3 through overflow; various chemical substances, organic substances, heavy metal ions and impurities in the water are adsorbed by the first packing layer 2.7, thereby removing harmful substances in the water to obtain primary filtered water; the primary filtered water then enters the aerobic area 2.4; through the aerator 2.10 and the second packing layer 2.8, the microorganisms attached to the second packing layer 2.8 grow and reproduce rapidly to form a biofilm, which can adsorb, decompose odor and deodorize harmful chemical substances such as sulfide, hydride, methanol, benzene, phenol, etc., to obtain secondary filtered water; the secondary filtered water finally enters the deep filtration area 2.5, and is further adsorbed by the third packing layer 2.12 to obtain tertiary filtered water (residual pollutants are scarce); the tertiary filtered water is connected to the surface of the plant layer on the artificial wetland 3 through a pipeline through the drain outlet of the biological filter 2; it is further degraded by the artificial wetland 3, and the sewage is finally treated. The entire treatment process does not require backwashing or even the addition of bacteria, which reduces costs and ensures that the sewage can meet emission standards after treatment.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A decentralized sewage treatment system, characterized in that: It comprises a regulating pool (1), a biological filter (2) and an artificial wetland (3); the water outlet of the regulating pool (1) is connected to the water inlet of the sedimentation area (2.2) of the biological filter (2) through a pipeline, and the drainage outlet of the biological filter (2) is connected to the surface of the plant layer on the artificial wetland (3) through a pipeline; The biofilter (2) comprises: a tank body (2.1), a sedimentation zone (2.2), a pretreatment zone (2.3), an aerobic zone (2.4) and a deep filtration zone (2.5); a baffle (4) is provided in the tank body (2.1) to form the sedimentation zone (2.2), the pretreatment zone (2.3), the aerobic zone (2.4) and the deep filtration zone (2.5); a sewage pump (2.6) is installed at the bottom of the sedimentation zone (2.2); .3) is provided with a first packing layer (2.7), the aerobic zone (2.4) is provided with a second packing layer (2.8), an aeration pipe (2.9) is installed at the bottom of the aerobic zone (2.4), a plurality of aerators (2.10) are evenly arranged on the aeration pipe (2.9), and the air inlet end of the aeration pipe (2.9) is connected to the air outlet end of the fan (2.11); and a third packing layer (2.12) is provided in the deep filtration zone (2.5).

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