CN222348804U - Rural domestic sewage treatment system - Google Patents

Abstract

The utility model provides a rural domestic sewage treatment system, including a regulating tank, a bacteria culture tank, a bacteria-algae symbiotic tank, a benthic symbiotic tank, and a water storage tank connected in sequence. The upstream and downstream of the regulating tank are respectively provided with a sewage inlet and a sewage outlet. A regulating pump for regulating the liquid level of the bacteria culture tank is provided between the regulating tank and the bacteria culture tank. A water valve is provided on the pipeline connecting the bacteria culture tank and the bacteria-algae symbiotic tank. A hanging filler is provided in the bacteria culture tank. The top of the bacteria-algae symbiotic tank is light-transmitting. The benthic symbiotic tank adopts an algae-grass-fish mode. The bacteria culture tank is used to decompose the macromolecular substances in rural domestic sewage into small molecular substances, and decompose the organic nitrogen and phosphorus into inorganic nitrogen and phosphorus absorbed by carp algae, which can not only supply the growth and reproduction of anaerobic bacteria, but also can be used for the growth and reproduction of bacteria and algae in the subsequent bacteria-algae symbiotic tank, thereby reducing construction costs, improving economic value, and beautifying the environment.

Description

Rural domestic sewage treatment system

Technical Field

The utility model relates to the technical field of rural domestic sewage treatment, in particular to a rural domestic sewage treatment system.

Background

The daily production of sewage in rural towns with a size of 4000-6000 people can reach about 500 tons, and the sewage mainly comes from sewage discharged in the daily life process of residents (kitchen, bath, clothes washing and the like), contains a large amount of grease, microorganisms and sundries, and has the characteristics of high nitrogen and phosphorus content, stable water quality, good biodegradability and obvious peak Gu Chazhi. At present, rural non-point source pollution mainly comes from unordered discharge of untreated domestic sewage, a large amount of organic matters and microorganisms contained in the sewage cannot be effectively treated so as to pollute surface water and underground water, and thus the rural environment is wholly deteriorated, and therefore, how to realize harmless treatment of rural domestic sewage is a key of comprehensive treatment of rural environment.

The sewage treatment modes are divided into two types, a centralized sewage treatment mode and a decentralized sewage treatment mode. Wherein the centralized sewage treatment mode is suitable for cities and towns with centralized living, and the decentralized sewage treatment mode is suitable for rural areas with more decentralized living. The traditional decentralized sewage treatment facilities in China mostly adopt traditional contact oxidation, activated sludge, artificial wetland (plant), unpowered technology and the like. Some are only single aeration mode, and the energy consumption is high, and some are plant treatment methods such as artificial wetland, etc., the occupied area is large, and the operation is unstable under the influence of climate.

CN202226754U discloses an integrated rural sewage treatment system, which comprises a sewage collecting tank, a biological treatment system and a sludge tank, wherein the sewage collecting tank is communicated with the biological treatment system through a conveying water pump, the biological treatment system comprises an anoxic tank, an anaerobic tank, an aerobic tank and a secondary sedimentation tank, and the sludge tank is arranged on the sides of the anoxic tank and the anaerobic tank and is connected with the secondary sedimentation tank through a gas stripping device. The process has the advantages of stable technical performance, good treatment effect, investment saving, small occupied area, simple operation, convenient management and the like.

CN204281506U discloses a device for removing pollutants in rural domestic sewage, which comprises a three-grid septic tank, a filter screen, an anaerobic suspended filler bed reaction tank, a low-oxygen aeration tank, a vertical flow sedimentation tank, an artificial aquatic plant bed and a phosphorus absorption tank which are sequentially communicated, and has the advantages of high treatment efficiency, high effluent quality reaching the first-level a standard, small occupied area, low operation and maintenance cost and the like.

In the prior art, the rural sewage treatment system has high dependency on seasons and temperatures, each treatment unit basically needs manual excavation, the labor intensity is high, and in addition, the constructed sewage treatment system meets the basic sewage treatment performance, but has limited effect of reasonably utilizing rural land and beautifying rural environment. The rural area is generally provided with a large and small pit and has natural aquatic ecosystem construction conditions, so that the characteristics can be fully utilized to artificially construct the ecosystem.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model provides a rural domestic sewage treatment system, and in order to achieve the purposes, the utility model adopts the following technical scheme:

The utility model provides a rural domestic sewage treatment system, includes equalizing basin, fungus culture pond, fungus algae symbiotic pond, benthic symbiotic pond, the tank that connects gradually in proper order, the upper reaches and the low reaches of equalizing basin are provided with sewage entry and sewage outlet respectively, be provided with the governing pump of equalizing basin liquid level between equalizing basin and the fungus culture pond, be equipped with the water valve on the pipeline that fungus culture pond and fungus algae symbiotic pond are connected, be equipped with suspension type filler in the fungus culture pond, the top printing opacity in fungus algae symbiotic pond sets up, and benthic symbiotic pond adopts algae-grass-fish mode.

Furthermore, a first overflow port is arranged on one side of the bacteria-algae symbiotic pool, and the first overflow port is connected with the benthic symbiotic pool.

Furthermore, one side of the benthonic symbiotic pool is provided with a second overflow port, and the second overflow port is connected with the water storage pool.

Further, the suspension type filler is 0.3-0.5m away from the water surface, and the filling ratio of the suspension type filler is 20% -40% of the volume of the bacteria culture pond.

The fungus and algae symbiotic pool the top part is provided with a light-transmitting net, the inside is provided with a light source group.

Furthermore, the bottom of the benthonic symbiotic pool is provided with a filler layer, and both sides of the benthonic symbiotic pool are respectively provided with a heat preservation layer and a heating system.

Further, the packing layer comprises a gravel layer and a gravel layer which are sequentially paved up and down.

Compared with the prior art, the utility model has the following beneficial effects:

The method is characterized in that macromolecular substances in rural domestic sewage are decomposed into small molecular substances by utilizing a bacteria culture pond, organic nitrogen and phosphorus are decomposed into inorganic nitrogen and phosphorus absorbed by carp algae, anaerobic bacteria can be supplied for growth and reproduction, bacteria and algae in a follow-up bacteria-algae symbiotic pond can be used for growth and reproduction, wherein the bacteria in the bacteria-algae symbiotic pond are aerobic bacteria, the macromolecular substances can be further strengthened and decomposed for growth of algae, the algae growing in the bacteria-algae symbiotic pond enter the algae-grass-fish-benthic symbiotic pond, feeding of fish is carried out, the use of feed is reduced, meanwhile, the fed fish can also generate economic value, the algae-grass-fish-benthic symbiotic pond can be constructed by utilizing a pot limited by rural areas, the construction cost is reduced, the economic value is improved, and the environment is beautified.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic structural view of the benthic symbiotic pool of the utility model.

In the drawings, a regulating tank 1, a fungus culture tank 2, a fungus and algae symbiotic tank 3, a benthonic symbiotic tank 4, a water storage tank 5, a regulating pump 6, a sewage inlet 7, a suspension filler 8, a water valve 9, a light source group 10, a first overflow port 11, a heat preservation layer 12, a gravel layer 13, a gravel layer 14, a second overflow port 15, a heating system 16, a sewage outlet 17 and a light-transmitting net 18.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

Example 1:

As shown in figures 1-2, the utility model provides a technical scheme, wherein an adjusting tank 1 is connected with a fungus culture tank 2 through an adjusting pump 6, the fungus culture tank 2 is sequentially connected with a fungus-algae symbiotic tank 3, an algae-grass-fish-benthic symbiotic tank 4 and a water storage tank 5, the adjusting tank 1 can adjust the water quantity of rural domestic sewage to keep the water quantity in a subsequent treatment unit stable, the fungus culture tank 2 is an anaerobic environment, the anaerobic bacteria are utilized to decompose macromolecular substances to generate nutrient substances such as nitrogen and phosphorus, the water containing the nutrient substances is conveyed to the fungus-algae symbiotic tank 3 through pipelines, the aerobic bacteria continue to decompose organic pollutants, the nutrient substances and CO2 generated by the fungus culture tank 2 are supplied to algae growth and reproduction, the algae and the water in the fungus-algae symbiotic tank 3 enter the algae-grass-fish-benthic symbiotic tank 4 for further treatment and ingestion, and the water in the water storage tank 5 is finally used for recycling.

In this embodiment, the upper part of one side of the regulating tank 1 is provided with a sewage inlet 7, the bottom of the other side is provided with a sewage outlet 17, and the sewage outlet 17 is connected with the regulating pump 6 through a pipeline to keep a stable water quantity of the water in the regulating tank 2 and input the water into the subsequent treatment unit.

In this embodiment, a suspension type filler 8 is disposed in the bacteria culture pond 2, and the suspension type filler 8 is 0.3-0.5m away from the water surface to provide attachment sites for anaerobic bacteria.

In this embodiment, a water valve 9 is disposed on a pipeline connected between the bacteria culture pond 2 and the bacteria-algae symbiotic pond 3, so as to prevent oxygen, algae and other bacteria contained in the bacteria-algae symbiotic pond from entering the bacteria culture pond 2 and affecting the treatment effect of the bacteria culture pond 2.

Preferably, the filling ratio of the suspension type filling material 8 is 20% -40% of the volume of the fungus culture pond 2.

Preferably, the length-width ratio of the bacteria culture pond 2 is 2-2.5:1, the depth is 2.5-3.5m, and the bacteria cultured in the bacteria culture pond 2 are anaerobic bacteria.

Preferably, the top of the algae-bacteria symbiotic pool 3 is provided with a light-transmitting net 18, which can prevent external impurities and ensure natural light transmission to supply algae growth and reproduction, and a light source group 10 is arranged in the algae-bacteria symbiotic pool, and when the yield of the algae cannot meet the requirements of the subsequent fish, the light source group 10 is started to supplement light to strengthen the production of the algae.

Preferably, the illumination intensity of the light source unit 10 is 8000-12000Lux.

Preferably, a first overflow port 11 is arranged at one side of the algae-symbiotic pool 3, the first overflow port 11 is connected with the algae-grass-fish-benthic symbiotic pool 4, and water generated in the algae-symbiotic pool after algae treatment and algae with higher density can overflow into the algae-grass-fish-benthic symbiotic pool 4 to further treat the water and feed the algae as feed for fish.

Further preferably, the aspect ratio of the mycorrhizal symbiotic pool 3 is 5-5.5:1, the depth is 0.5-1m, the cultured bacteria are aerobic bacteria, the algae are diatom and/or green algae, the algae are mainly diatom when the temperature is lower than 25 ℃, and the green algae are mainly when the temperature is higher than 25 ℃.

Preferably, a second overflow port 15 is arranged at one side of the algae-grass-fish-benthonic symbiotic pool 4, the second overflow port 15 is connected with the water storage pool 5, and water with the quality reaching the standard after the advanced treatment of the algae-grass-fish-benthonic organisms is sent into the water storage pool 5 for temporary storage and subsequent recycling.

Further preferably, the bottom of the algae-grass-fish-benthic symbiotic pool 4 is provided with a filler layer, two sides of the pool are respectively provided with a heat preservation layer 12 and a heating system, the water temperature is maintained in a relatively stable state, and the influence of seasons is reduced.

Further, the packing layer comprises a gravel layer 13 and a gravel layer 14 from top to bottom, the thickness of the gravel layer 13 is 5-10cm, the particle size of the gravel is 0.8-1.5cm, and the thickness of the gravel layer 14 is 3-5cm, so that a growth environment and a space are provided for benthonic organisms and submerged plants.

Preferably, the density of benthos in the algae-grass-fish-benthic symbiotic pool 4 is 0.2-0.5 tail/m 2, and the density of grass is 10-20 plants/m 2.

Preferably, if the daily sewage treatment volume is 1, the volume of the bacteria culture pond 2 is 1/3-1/2 of the daily sewage treatment volume, the volume of the bacteria-algae symbiotic pond 3 is 2-6 times of the daily sewage treatment volume, and the volume of the algae-grass-fish-benthic symbiotic pond 4 is 4-10 times of the daily sewage treatment volume.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (7)

1. A rural domestic sewage treatment system, characterized in that it comprises a regulating tank, a bacteria culture tank, a bacteria-algae symbiotic tank, a benthic symbiotic tank, and a water storage tank connected in sequence, wherein a sewage inlet and a sewage outlet are respectively provided at the upstream and downstream of the regulating tank, a regulating pump for regulating the liquid level of the bacteria culture tank is provided between the regulating tank and the bacteria culture tank, a water valve is provided on the pipeline connecting the bacteria culture tank and the bacteria-algae symbiotic tank, a hanging filler is provided in the bacteria culture tank, the top of the bacteria-algae symbiotic tank is light-transmitting, and the benthic symbiotic tank adopts an algae-grass-fish mode. 2. A rural domestic sewage treatment system as described in claim 1, characterized in that a first overflow port is provided on one side of the bacteria-algae symbiosis pool, and the first overflow port is connected to the benthic symbiosis pool. 3. A rural domestic sewage treatment system as described in claim 1, characterized in that a second overflow port is provided on one side of the benthic symbiosis pool, and the second overflow port is connected to a water storage tank. 4. A rural domestic sewage treatment system as described in claim 1, characterized in that the suspended filler is 0.3-0.5m away from the water surface, and the filling ratio of the suspended filler is 20%-40% of the volume of the bacteria culture tank. 5. A rural domestic sewage treatment system as described in claim 1, characterized in that a light-transmitting net is provided on the top of the bacteria-algae symbiosis pool, and a light source group is provided inside. 6. A rural domestic sewage treatment system as described in claim 1, characterized in that a filler layer is provided at the bottom of the benthic symbiotic pool, and a heat preservation layer and a temperature increasing system are provided on both sides. 7. A rural domestic sewage treatment system as described in claim 6, characterized in that the filler layer comprises a crushed stone layer and a gravel layer laid successively up and down.