CN210855710U

CN210855710U - Ecological sewage treatment system for expressway service area

Info

Publication number: CN210855710U
Application number: CN201921588280.7U
Authority: CN
Inventors: 张宝彬; 管建越; 张保林
Original assignee: Shaanxi Jinbaodi Traffic Engineering Construction Co ltd
Current assignee: Shaanxi Jinbaodi Traffic Engineering Construction Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-06-26
Anticipated expiration: 2029-09-23

Abstract

The utility model relates to an ecological sewage treatment system in highway service area relates to sewage treatment's technical field, aims at solving the sewage treatment system overall structure among the prior art and is not compact enough, leads to holistic area big, problem that equipment cost is high. The device comprises a septic tank, a sewage comprehensive treatment tank, a vegetation purification tank and a water storage tank which are sequentially communicated, wherein a first water pipe is connected between the septic tank and the sewage comprehensive treatment tank, a second water pipe is connected between the sewage comprehensive treatment tank and the vegetation purification tank, a third water pipe is connected between the vegetation purification tank and the water storage tank, the sewage comprehensive treatment tank comprises a shell, an upper aerobic zone and a lower anaerobic zone are arranged in the shell, an aerating device for aeration is arranged between the aerobic zone and the anaerobic zone, and a water outlet collecting tank for collecting clear water is arranged at the top of the aerobic zone; the bottom of the septic tank is provided with a sewage discharge pipe. The utility model discloses it is less to have the equipment of using under the circumstances of guaranteeing a water stabilization of quality, beneficial effect that the input cost is low.

Description

Ecological sewage treatment system for expressway service area

Technical Field

The utility model belongs to the technical field of sewage treatment's technique and specifically relates to an ecological sewage treatment system in highway service area is related to.

Background

The highway service area is provided with public toilets, markets, restaurants, parking lots, car washing parks, maintenance stations and gas stations, the public facilities provide convenience for people and also become sewage discharge sources, most of the highway service area is built in places with rare smoke, and the places are not provided with matched sewage treatment systems, so that if the public facilities are discharged on site, the surrounding environment is polluted in the past, and the normal operation of the service area is influenced; if the discharge is simply treated, the discharge can not reach the standard; if the waste water is directly transported to a sewage treatment plant for treatment, a large amount of manpower and material resources are consumed.

In order to solve the problems, the utility model with the bulletin number of CN207108745U discloses a sewage treatment system for a highway service area, which comprises a grid filter tank, an adjusting tank, a biological contact oxidation tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and an artificial vegetation filter tank which are connected in sequence; the upper end of the grid filtering pond is provided with a water inlet pipe, the grid filtering pond is connected with the adjusting pond through a first water pump, and the adjusting pond is connected with the biological contact oxidation pond through a second water pump.

Above-mentioned utility model highway service area sewage treatment system, the operating efficiency is high, and the running cost is low, can not only realize effectively degrading particulate matter, organic pollutant, ammonia nitrogen, total nitrogen in the sewage, can also high-efficiently get rid of total phosphorus, makes the system go out the water stably.

However, the overall structure of the sewage treatment system in the prior art is not compact enough, which results in large overall occupied area and high equipment cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a highway service area ecotype sewage treatment system, it has used equipment less under the circumstances of guaranteeing a water stabilization of quality, beneficial effect that the input cost is low.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

an ecological sewage treatment system of a highway service area comprises a septic tank, a sewage comprehensive treatment tank, a vegetation purification tank and a water storage tank which are sequentially communicated, wherein a sewage inlet pipe is connected to the septic tank, a first water pipe is connected between the septic tank and the sewage comprehensive treatment tank, a second water pipe is connected between the sewage comprehensive treatment tank and the vegetation purification tank, a third water pipe is connected between the vegetation purification tank and the water storage tank, the sewage comprehensive treatment tank comprises a shell, an upper aerobic zone and a lower anaerobic zone are arranged in the shell, an aerating device for aeration is arranged between the aerobic zone and the anaerobic zone, a water outlet collecting tank for collecting clear water is arranged at the top of the aerobic zone, and the first water pipe is connected into the sewage comprehensive treatment tank from the bottom of the shell; and a sewage discharge pipe is arranged at the bottom of the septic tank.

Through adopting above-mentioned technical scheme, the purification process of sewage does: sewage enters a septic tank, the septic tank initially plays roles of intercepting manure residues, fermenting and precipitating worm eggs, intercepted solid pollutants are discharged through a discharge pipe, the sewage flowing out of the septic tank enters a shell of a sewage comprehensive treatment tank through a first water pipe and sequentially passes through an anaerobic zone and an aerobic zone, the anaerobic environment of the anaerobic zone enables phosphorus-accumulating bacteria to complete phosphorus release in the zone, denitrifying bacteria continuously utilize a carbon source in the sewage to perform denitrification to remove nitrate nitrogen, the sewage after denitrification and dephosphorization enters the aerobic zone to perform aerobic treatment, and carbon and nitrogen pollutants in the sewage are converted into nitrified nitrogen, carbon dioxide and water through the aerobic bacteria, so that the sewage is purified, in the process, an aerating device aerates the shell, and the gas entering the shell flows upwards to supplement oxygen for the aerobic zone continuously; the water after being purified flows into out the water collecting vat from the casing top, flows into the vegetation purifying tank through the second water pipe, through the absorption and the purification back of vegetation in the vegetation purifying tank, has further reduced the content of harmful substance such as impurity and bacterium, heavy metal of aquatic, enters into the storage pond through the third water pipe at last and saves, and the water of storage can be used to the afforestation water, washes lavatory water or carwash water. This setting is through carrying out the division of aerobic zone, anaerobic zone in a casing for sewage passes through anaerobic zone and aerobic zone in proper order in a casing, and device overall structure is compact, and used equipment is few, and area is little and practiced thrift the cost.

The utility model discloses further set up to: and a lower layer filler and an upper layer filler are respectively arranged in the anaerobic zone and the aerobic zone, and the particle size of the upper layer filler is smaller than that of the lower layer filler.

By adopting the technical scheme, the lower layer of the filler is used for intercepting massive pollutants, the upper layer of the filler is used for intercepting small pollutants, and the upper layer of the filler and the lower layer of the filler are better divided into work, so that the pollutants are prevented from being collected in the anaerobic zone too much to cause the sewage to flow upwards difficultly.

The utility model discloses further set up to: the density of the upper layer filler and the density of the lower layer filler are both greater than the sewage density or both less than the sewage density, or the density of the lower layer filler is greater than the sewage density and the density of the upper layer filler is less than the sewage density.

Through adopting above-mentioned technical scheme, certain clearance is kept to lower floor's filler in the anaerobic zone and the upper filler in the aerobic zone under the buoyancy of water to distinguish the aerobic zone with the anaerobic zone is more clear, avoid mixing each other between the upper filler in the aerobic zone and the lower filler in the anaerobic zone, influence biochemical reaction's process.

The utility model discloses further set up to: the effluent collecting tank is arranged around the inner wall or the outer wall of the upper part of the shell in a circle, a screen plate is arranged between the effluent collecting tank and the aerobic zone, and the diameter of meshes on the screen plate is smaller than the particle size of the upper-layer filler; and the second water pipe is connected to the sewage comprehensive treatment pool from the effluent collecting tank.

By adopting the technical scheme, water passing through the aerobic zone overflows into the water outlet collecting tank after penetrating through the upper screen plate, and the water entering the water outlet collecting tank is guided into the vegetation purifying tank through the second water pipe for further purification. The effect of sieve plate is that keep apart the upper filler, prevents that the upper filler from entering into out the water collecting vat along with rivers in, and further assurance rivers are clean, prevent the loss of upper filler.

The utility model discloses further set up to: the aeration device comprises an aeration pipeline and an air distribution pipe head, the aeration pipeline is spirally wound between the aerobic zone and the anaerobic zone, and the air distribution pipe head is positioned above the aeration pipeline.

Through adopting above-mentioned technical scheme, gaseous back that gets into from aeration pipe, flow through the gas distribution pipe head to in the aerobic zone of upflow, to supplying oxygen in the aerobic zone, aeration pipe's spiral coil sets up and makes gaseous everywhere that can relatively even distribution to the aerobic zone, increases the oxygen content everywhere in aerobic zone, and the setting of a plurality of gas distribution pipe heads can effectively reduce the aeration amount of wind, reduces running cost.

The utility model discloses further set up to: the vegetation purifying pond includes planting district and catchment district, planting district with the intercommunication position department in catchment district is equipped with the infiltration geotechnological cloth, the second water pipe is followed planting district inserts the vegetation purifying pond, the third water pipe is followed the catchment district inserts the vegetation purifying pond.

Through adopting above-mentioned technical scheme, planting the district and being used for planting the plant, and planting the plant and need have the earth that supplies the vegetation to prick the root, the catchment area is used for saving the clean water after the vegetation purification of planting the district, and the third water pipe leads to water through the catchment area in to the tank, has avoided taking out impurity such as the earth of aquatic.

The utility model discloses further set up to: and a rubble layer, a brick and tile rubble layer and a base soil layer are sequentially laid in the planting area from bottom to top, and the grass and vegetation with developed root systems are planted in the planting area.

Through adopting above-mentioned technical scheme, rubble layer and brick and tile piece layer play the effect of intercepting aquatic impurity for water carries out abundant contact with the root of grass quilt plant in its gap, further obtains purifying. The brick and tile surface micropore is more, has the adsorption function to aquatic impurity, in addition, compares in the rubble, and the hygroscopicity of brick and tile fragment itself is stronger, can save water wherein, provides moisture content for vegetation growth when rivers are less, and the basic soil layer then provides the nutrient for the growth of plant, makes the ability of plant maintenance water purification.

The utility model discloses further set up to: aquatic plants are cultured in the water storage tank.

Through adopting above-mentioned technical scheme, the aquatic plant can further absorb and decompose the heavy metal and the organic matter of aquatic, reduces the harmful substance in the aquatic.

The utility model discloses further set up to: the septic tank is internally and vertically provided with a plurality of parallel clapboards, a settling zone is formed between the adjacent clapboards, the adjacent settling zones are communicated above the clapboards, an isolation net is arranged above each settling zone, and the sewage inlet pipe and the first water pipe are respectively connected into the septic tank from the settling zones at the two ends.

Through adopting above-mentioned technical scheme, the sewage that enters into in the septic tank along sewage inlet tube deposits through each settling zone in proper order, and the solid-state impurity that finally contains in the water that flows from first water pipe is less, makes things convenient for the later stage to handle the purification.

The utility model discloses further set up to: the height of the partition plate is sequentially reduced from the end where the sewage inlet pipe is located to the end where the first water pipe is located.

Through adopting above-mentioned technical scheme, sewage can flow into next settling zone from the lower baffle that constitutes the settling zone in the in-process of circulation in the septic tank, and can not take place the backward flow, and the sediment is more regular, and the effect is better.

To sum up, the utility model discloses a beneficial technological effect does:

1. the aerobic zone and the anaerobic zone are divided in one shell, so that sewage sequentially passes through the anaerobic zone and the aerobic zone in one shell, the device has a compact integral structure, less used equipment, small occupied area and cost saving;

2. the vegetation purification pool is divided into a planting area and a water collecting area, the water seepage geotextile is arranged at the communication position of the planting area and the water collecting area, and the third water pipe introduces water into the water storage pool through the water collecting area, so that impurities such as soil in the water are prevented from being brought out;

3. the broken brick and tile block layer is arranged in the planting area, and has an adsorption function on impurities in water due to more micropores on the surfaces of the bricks and tiles, and in addition, compared with broken stones, the broken brick and tile blocks have stronger water absorption property, so that water can be stored in the broken brick and tile block layer, water is provided for vegetation growth when water flow is small, and a base soil layer provides nutrients for plant growth, so that the capacity of purifying water quality of plants is maintained;

4. by cultivating the aquatic plants in the water storage tank, the aquatic plants can further absorb and decompose heavy metals and organic matters in water, and harmful substances in water are reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the figure, 1, a septic tank; 11. a partition plate; 12. a settling zone; 13. an isolation net; 2. a sewage comprehensive treatment tank; 21. a housing; 22. an anaerobic zone; 221. lower layer filling; 23. an aerobic zone; 231. filling the upper layer; 24. a screen plate; 25. a water outlet collecting tank; 26. reinforcing rib plates; 27. an inflator; 271. an aeration pipe; 272. a gas distribution pipe head; 3. a vegetation purification tank; 31. a planting area; 311. a crushed stone layer; 312. a layer of broken bricks and tiles; 313. a base soil layer; 314. vegetation plants; 32. a water collection area; 33. water seepage geotextile; 4. a water storage tank; 41. an aquatic plant; 5. a blow-off pipe; 6. a sewage inlet pipe; 7. a first water pipe; 8. a second water pipe; 9. and a third water pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses an ecological sewage treatment system of highway service area, including septic tank 1, the comprehensive treatment of sewage pond 2, vegetation purification tank 3 and the tank 4 that communicate in proper order, connect sewage inlet tube 6 on septic tank 1, 1 bottom of the pool in septic tank is provided with blow off pipe 5, is connected first water pipe 7 between septic tank 1 and the comprehensive treatment of sewage pond 2, is connected second water pipe 8 between comprehensive treatment of sewage pond 2 and the vegetation purification tank 3, is connected third water pipe 9 between vegetation purification tank 3 and the tank 4.

Referring to fig. 1, a plurality of baffles 11 that are parallel to each other are vertically arranged in the septic tank 1, the utility model discloses three baffles 11 in this embodiment, form sedimentation zone 12 between the adjacent baffle 11, communicate with each other above baffle 11 between the adjacent sedimentation zone 12, every sedimentation zone 12 top cover is equipped with separation net 13, sewage inlet tube 6 and first water pipe 7 insert the septic tank 1 from the sedimentation zone 12 at both ends respectively in, wherein, the height of baffle 11 reduces in proper order from sewage inlet tube 6 place end to first water pipe 7 place end. The sewage that enters into septic tank 1 along sewage inlet tube 6 deposits through each settling zone 12 in proper order, and the in-process of sewage circulation in septic tank 1 can follow the lower baffle 11 that constitutes settling zone 12 and go up regular inflow next settling zone 12, and can not take place the backward flow, and the solid-state impurity that finally contains in the water that flows out from first water pipe 7 is less, makes things convenient for the later stage to carry out purification treatment.

Referring to fig. 1, the integrated wastewater treatment tank 2 includes a housing 21, an upper aerobic zone 23 and a lower anaerobic zone 22 are provided in the housing 21, a first water pipe 7 is connected to the integrated wastewater treatment tank 2 from the bottom of the housing 21, a lower layer filler 221 and an upper layer filler 231 are respectively provided in the anaerobic zone 22 and the aerobic zone 23, the particle size of the upper layer filler 231 is smaller than that of the lower layer filler 221, and the densities of the upper layer filler 231 and the lower layer filler 221 are both greater than the wastewater density or both smaller than the wastewater density, or the density of the lower layer filler 221 is greater than the wastewater density and the density of the upper layer filler 231 is smaller than the wastewater density. The utility model discloses the material density of upper filler 231 in this embodiment is less than sewage density, the material density of lower filler 221 is greater than sewage density, still set up and make lower filler 221 in the anaerobic zone 22 and the upper filler 231 in the aerobic zone 23 keep certain clearance under the buoyancy effect of water, thereby distinguish the more clear district of aerobic zone 23 and anaerobic zone 22, avoid mixing each other between the upper filler 231 in the aerobic zone 23 and the lower filler 221 in the anaerobic zone 22, influence biochemical reaction's process.

Referring to fig. 1, an effluent collecting tank 25 for collecting clear water is arranged at the top of the aerobic zone 23, the effluent collecting tank 25 is arranged around the inner wall of the upper part of the shell 21 by one circle, a reinforcing rib plate 26 for supporting the effluent collecting tank 25 is arranged below the effluent collecting tank 25, the reinforcing rib plate 26 is triangular, one edge of the reinforcing rib plate is tightly attached to the lower wall of the effluent collecting tank 25, and the other edge of the reinforcing rib plate is fixed on the side wall of the shell 21; in addition, in order to prevent the upper layer of the filler 231 from entering the effluent collecting tank 25 along with the water flow, a screen plate 24 is arranged between the effluent collecting tank 25 and the aerobic zone 23, and the diameter of a mesh on the screen plate 24 is smaller than the particle size of the upper layer of the filler 231; the second water pipe 8 is connected to the sewage comprehensive treatment tank 2 from the effluent collecting tank 25.

Referring to fig. 1, an aeration device 27 for aeration is disposed between the aerobic zone 23 and the anaerobic zone 22, the aeration device 27 includes an aeration pipe 271 and a gas distribution pipe head 272, the aeration pipe 271 is spirally wound between the aerobic zone 23 and the anaerobic zone 22, and the gas distribution pipe head 272 is located above the aeration pipe 271. After the gas is introduced from the aeration pipeline 271, the gas flows out through the gas distribution pipe head 272 and flows upwards into the aerobic zone 23 to supplement oxygen to the aerobic zone 23, the gas can be relatively uniformly distributed to each part of the aerobic zone 23 due to the spiral winding arrangement of the aeration pipeline 271, the oxygen content of each part of the aerobic zone 23 is increased, and the arrangement of the plurality of gas distribution pipe heads 272 can effectively reduce the aeration air volume and reduce the operation cost.

Referring to fig. 1, a vegetation purification pond 3 comprises a planting area 31 and a water collecting area 32, a rubble layer 311, a brick and tile rubble layer 312 and a base soil layer 313 are sequentially paved in the planting area 31 from bottom to top, and vegetation plants 314 with developed root systems are planted in the planting area 31; the communication position of the planting area 31 and the water collecting area 32 is positioned at one side of the brick and tile broken block layer 312, and the communication position is covered with a water seepage geotextile 33; the second water pipe 8 is connected into the vegetation purifying pond 3 from the planting area 31, the third water pipe 9 is connected into the vegetation purifying pond 3 from the water collecting area 32, and the third water pipe 9 is connected into water through the water collecting area 32 to the water storage pond 4, so that the impurities such as soil in the water are prevented from being brought out. The gravel layer 311 and the brick and tile crushed block layer 312 have the function of intercepting impurities in water, so that the water is in full contact with the roots of the vegetation 314 in gaps of the water, and further purified; and the surface of the brick and tile has more micropores and has the function of adsorbing impurities in water.

Referring to fig. 1, aquatic plants 41 are cultivated in the water storage tank 4, and the aquatic plants 41 can further absorb and decompose heavy metals and organic matters in water, so as to reduce harmful substances in water.

The purification process and the principle of the sewage are as follows: sewage enters the septic tank 1, the septic tank 1 initially plays roles of intercepting manure residues, fermenting and precipitating worm eggs, and intercepted solid pollutants are discharged through the sewage discharge pipe 5 and are periodically transported away; sewage flowing out of the septic tank 1 enters a shell 21 of the sewage comprehensive treatment tank 2 through a first water pipe 7 and sequentially passes through an anaerobic zone 22 and an aerobic zone 23, phosphorus-accumulating bacteria complete phosphorus release in the anaerobic zone 22 under the anaerobic environment, denitrifying bacteria continuously utilize a carbon source in the sewage to perform denitrification to remove nitrate nitrogen, the sewage after denitrification and dephosphorization enters the aerobic zone 23 to perform aerobic treatment, and carbon and nitrogen pollutants in the sewage are converted into nitrified nitrogen, carbon dioxide and water through the aerobic bacteria, so that the sewage is purified; in the process, the aeration device 27 aerates the shell 21, and the oxygen-enriched gas entering the shell 21 flows upwards to continuously supplement oxygen for the aerobic zone 23; the purified water overflows into the water outlet collecting tank 25 from the top of the shell 21 through the screen plate 24, the water in the water outlet collecting tank 25 flows into the vegetation purifying tank 3 through the second water pipe 8, and after the water in the vegetation purifying tank 3 is absorbed and purified by the root system of vegetation, the contents of impurities, bacteria, heavy metals and other harmful substances in the water are further reduced; finally, the purified water enters the water storage tank 4 through the third water pipe 9 for storage, the water is further purified by the aquatic plants 41 in the storage process, and the stored water can be used for greening water, toilet flushing water or car washing water.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides an ecological sewage treatment system in highway service area which characterized in that: comprises a septic tank (1), a sewage comprehensive treatment tank (2), a vegetation purification tank (3) and a water storage tank (4) which are sequentially communicated, wherein a sewage inlet pipe (6) is connected on the septic tank (1), a first water pipe (7) is connected between the septic tank (1) and the sewage comprehensive treatment tank (2), a second water pipe (8) is connected between the sewage comprehensive treatment tank (2) and the vegetation purification tank (3), a third water pipe (9) is connected between the vegetation purification tank (3) and the water storage tank (4), the sewage comprehensive treatment tank (2) comprises a shell (21), an upper aerobic zone (23) and a lower anaerobic zone (22) are arranged in the shell (21), an aerating device (27) for aeration is arranged between the aerobic zone (23) and the anaerobic zone (22), a collecting tank (25) for collecting clear water is arranged at the top of the aerobic zone (23), the first water pipe (7) is connected into the sewage comprehensive treatment pool (2) from the bottom of the shell (21); and a sewage discharge pipe (5) is arranged at the bottom of the septic tank (1).

2. The ecological sewage treatment system of the expressway service area of claim 1, wherein: a lower layer of filler (221) and an upper layer of filler (231) are respectively arranged in the anaerobic zone (22) and the aerobic zone (23), and the particle size of the upper layer of filler (231) is smaller than that of the lower layer of filler (221).

3. The ecological sewage treatment system of the expressway service area of claim 2, wherein: the densities of the upper layer filler (231) and the lower layer filler (221) are both greater than the sewage density or both less than the sewage density, or the density of the lower layer filler (221) is greater than the sewage density and the density of the upper layer filler (231) is less than the sewage density.

4. The ecological sewage treatment system of the expressway service area of claim 2, wherein: the effluent collecting tank (25) is arranged around the inner wall or the outer wall of the upper part of the shell (21) in a circle, a screen plate (24) is arranged between the effluent collecting tank (25) and the aerobic zone (23), and the diameter of meshes on the screen plate (24) is smaller than the particle size of the upper-layer filler (231); and the second water pipe (8) is connected to the sewage comprehensive treatment pool (2) from the effluent collecting tank (25).

5. The ecological sewage treatment system of the expressway service area of claim 1, wherein: the aeration device (27) comprises an aeration pipeline (271) and an air distribution pipe head (272), the aeration pipeline (271) is spirally wound between the aerobic zone (23) and the anaerobic zone (22), and the air distribution pipe head (272) is positioned above the aeration pipeline (271).

6. The ecological sewage treatment system of the expressway service area of claim 1, wherein: vegetation purifying pond (3) are including planting district (31) and catchment district (32), planting district (31) with the intercommunication position department of catchment district (32) is equipped with infiltration geotechnological cloth (33), second water pipe (8) are followed planting district (31) access vegetation purifying pond (3), third water pipe (9) are followed catchment district (32) access vegetation purifying pond (3).

7. The ecological sewage treatment system of the expressway service area of claim 6, wherein: a gravel layer (311), a brick and tile broken block layer (312) and a foundation soil layer (313) are sequentially paved in the planting area (31) from bottom to top, and vegetation plants (314) with developed root systems are planted in the planting area (31).

8. The ecological sewage treatment system of the expressway service area of claim 1, wherein: aquatic plants (41) are cultured in the water storage tank (4).

9. The ecological sewage treatment system of the expressway service area of claim 1, wherein: a plurality of parallel partition plates (11) are vertically arranged in the septic tank (1), a settling zone (12) is formed between the adjacent partition plates (11), the adjacent settling zones (12) are communicated above the partition plates (11), an isolation net (13) is arranged above each settling zone (12), and the sewage inlet pipe (6) and the first water pipe (7) are respectively connected into the septic tank (1) from the settling zones (12) at two ends.

10. The ecological sewage treatment system of the expressway service area of claim 9, wherein: the height of the partition plate (11) is reduced from the end where the sewage inlet pipe (6) is located to the end where the first water pipe (7) is located in sequence.