CN215855635U

CN215855635U - Cascaded rural sewage ecological treatment system

Info

Publication number: CN215855635U
Application number: CN202121100483.4U
Authority: CN
Inventors: 宋承明
Original assignee: Shanghai Municipal Engineering Design Insitute Group Co Ltd
Current assignee: Shanghai Municipal Engineering Design Insitute Group Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-02-18
Anticipated expiration: 2031-05-21

Abstract

The utility model relates to the field of sewage treatment, in particular to a stepped rural sewage ecological treatment system. Including interception district, settling zone, ecological treatment district and water storage area, each district is cascaded distribution along the drainage direction, by high to low interception district, settling zone, ecological treatment district and play water zone respectively, the interception district is located the system top end and intakes the end for the fallen leaves, plastics and the large granule material of intercepting in the sewage, the settling zone is located between interception district and the ecological treatment district, utilizes the action of gravity to deposit the particulate matter in the sewage, the ecological treatment district is located between settling zone and the play water zone, utilizes substances such as nitrogen, phosphorus in the ecological technology processing sewage, the water storage area is located the system least significant end, is used for saving the water after purifying, and this system adopts the physics to combine ecological treatment method to remove the harmful pollutant in the sewage, purifies the water, has simple structure, running cost low, characteristics that treatment effect is good.

Description

Cascaded rural sewage ecological treatment system

Technical Field

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

Background

Along with the rapid development of rural economy in China, the amount of sewage in rural areas is increased day by day. However, rural infrastructure is imperfect, and sewage treatment systems are deficient, so that a large amount of sewage is difficult to be effectively treated, and the sewage is often discharged to nearby rivers along with the channels. The rural sewage is mainly kitchen sewage, washing sewage, household livestock and poultry breeding sewage and the like, and the sewage contains high organic pollutants, pathogenic microorganisms, nitrogen, phosphorus and other substances. If the water is not treated, not only the surface water and the underground water are polluted, but also mosquito and bacteria are bred, so that the stink is caused, and the health of local residents is threatened. At present, the treatment modes of rural domestic sewage in China mainly comprise biological treatment and ecological treatment. Common biological treatment technologies such as an A/O method, an A/O + MBR, an aeration biological filter, anaerobic biogas and the like; the ecological treatment technology comprises modes of constructed wetland, stabilization pond, earthworm ecological filter tank, land infiltration and the like. However, these treatment methods are often difficult to continue due to unstable influent water, high operating costs, or difficult sludge treatment. Therefore, aiming at the characteristics of domestic sewage in rural areas in China and the fact that part of treatment facilities cannot operate for a long time, a rural sewage treatment system which is simple in structure, convenient to operate, economical and reasonable is urgently required to be developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a stepped rural sewage ecological treatment system which is simple in structure, convenient to operate, low in cost and good in sewage treatment effect. In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a cascaded rural ecological sewage treatment system, includes interception district, settling zone, ecological treatment district, water storage area, and each district is cascaded distribution from a left side to the right side along drainage direction, by high to low interception district, settling zone, ecological treatment district and water storage area in proper order, the left side in interception district is for intaking the end, the right in water storage area is for going out the water end, the interception district is used for intercepting leaf, plastics and the large granule material that falls in the sewage, the settling zone utilizes the action of gravity to deposit the particulate matter in the sewage, ecological treatment district utilizes substances such as nitrogen, phosphorus in the ecological technology processing sewage, water storage area is used for saving the water after the purification.

Further, a grating is arranged on the upper surface of a stepped junction formed by the intercepting area and the settling area, and the length of the grating is equal to that of the stepped rural sewage ecological treatment system.

Preferably, the height of the grid is 20cm, and the size of the grid hole is 1cm multiplied by 1 cm.

Further, the settling zone upper surface with the lower surface parallel and level of intercepting zone, sewage in the intercepting zone can pass the grid and flow in the settling zone, the settling zone surface has set up the slope angle of downward sloping from the right side to a left side, and the mud pit sets up on the settling zone and is located the leftmost end of settling zone, and the mud pit is the formula design that sinks, and the dredge pump sets up in the mud pit, silt flows to the mud pit along with the slope, even there is the mud pipe on the dredge pump, and the mud pipe extends to the settling zone outside, and silt is discharged to the settling zone outside by the mud pipe, and overflow triangle weir sets up the settling zone with the echelonment juncture upper surface that ecological treatment formed, overflow triangle weir can prevent that sewage in the settling zone from spilling over, when the water level highly surpasses the height of triangle weir simultaneously, sewage flows in ecological treatment area via triangle weir.

Further, ecological treatment district's upper surface with the settling zone lower surface flushes, ecological treatment district by dividing into the four layers, be plant layer, gravel grained layer, quartz sand filter bed and artifical filter bed respectively from top to bottom, should lay the geotechnological cloth that permeates water between each layer, prevent that the filter material from mixing each other, the gravel layer is arranged in to the flower pipe that permeates water, runs through whole ecological treatment region, and it arranges that quantity is decided by regional width, permeates water and has the trompil on the flower pipe, trompil diameter 1 mm.

Preferably, the plants planted in the plant layer mainly comprise reed, cattail, windmill grass, cane shoots and the like, and the nitrogen and phosphorus removal effect of the system is improved by absorbing N, P and other elements in sewage through the plants.

Furthermore, the ecological treatment area comprises the grit and the artificial filter material layer of different particle sizes, the artificial filter material layer mainly comprises fixed filter material, sewage from the top flows into the artificial filter material layer, through the fixed filter material, the water constantly contacts with the filter material, the microorganism gathers on the surface of the filter material, metabolism activity is carried out, and then a layer of biomembrane is formed, the biomembrane is an ecosystem jointly formed by multiple microorganisms, organic matters are constantly absorbed from the sewage and serve as a self nutrient source, and then new microorganisms are constantly generated to maintain the stability of the biomembrane, the biomembrane absorption, the ion exchange effect and the biodegradation effect of the microorganisms inside the artificial filter material layer are utilized, and the purification of nitrogen, phosphorus and organic matters by the ecosystem is strengthened.

Further, the upper surface in retaining district with ecological treatment district's lower surface flushes, the sump pit has been seted up to the leftmost end in retaining district bottom surface, and the sump pit is the formula of sinking, installs the elevator pump in the pit, the elevator pump even has the reuse water pipe, the reuse water pipe extends to the outside in retaining district, the rightmost side in retaining district upper portion is equipped with the overflow outlet pipe, the overflow outlet pipe extends to the outside in retaining district, but the water after the purification overflow discharge system.

Furthermore, the pool walls of all areas are fully encapsulated by waterproof geotextile.

The utility model has the following advantages:

a step type sewage ecological treatment system is formed by utilizing the geographical terrain height difference, sewage sequentially enters each area under the action of gravity, and external force such as a lifting pump is not needed; removing harmful pollutants in the sewage by adopting a physical and ecological combined treatment method, and purifying a water body; and meanwhile, drop water is utilized to improve the oxygenation efficiency of sewage and improve the sewage treatment efficiency. The system has the characteristics of simple structure, low operation cost and good treatment effect.

Drawings

FIG. 1 is a schematic sectional view of a stepped rural sewage ecological treatment system in an embodiment.

FIG. 2 is a top view of a stepped rural sewage ecological treatment system in an embodiment.

Description of reference numerals:

1-interception area, 11-grid, 2-settling area, 21-overflow triangular weir, 22-mud pit, 23-mud pump, 24-mud pipe, 3-ecological treatment area, 31-plant layer, 32-gravel particle layer, 33-quartz sand filter layer, 34-artificial filter material layer, 35-perforated flower pipe, 36-overflow weir, 4-water storage area, 41-overflow water outlet pipe, 42-water collecting pit, 43-lifting pump and 44-reuse water pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the stepped rural sewage ecological treatment system in the embodiment includes an intercepting region 1, a settling region 2, an ecological treatment region 3 and a water storage region 4, the intercepting region 1 is located at the uppermost end of the system, the settling region 2 is located between the intercepting region 1 and the ecological treatment region 3, the settling region 2 includes an overflow triangular weir 21, a sludge discharge pit 22, a sludge discharge pump 23 and a sludge discharge pipe 24, the ecological treatment region 3 is composed of a planting layer 31, a gravel particle layer 32, a quartz sand filter layer 33, an artificial filter material layer 34, an opening flower pipe 35 and an overflow weir 36, the opening flower pipe is arranged in the artificial filter material layer, small holes are arranged on the opening flower pipe, and the water storage region 4 is located at the rearmost end of the system and is composed of an overflow water outlet pipe 41, a water collection pit 42, a lifting pump 43 and a reuse water pipe 44.

The working principle of the stepped rural sewage ecological treatment system in the embodiment is as follows: rural sewage is converged and then enters an ecological treatment system, and suspended substances such as plastics, leaves and the like are intercepted and removed through a grating 11 of an interception area 1; the sewage flows into the settling zone 2 again, large granular substances settle under the action of gravity, and the sediments flow into a mud pit 22 and are periodically discharged by a mud pipe 24 under the action of a mud pump 23; the settled sewage overflows into the ecological treatment area 3, elements such as N, P in the sewage are absorbed by using aquatic plants, meanwhile, the adsorption and ion exchange functions of a biological film in the artificial filter material layer 34 and the degradation function of microorganisms are utilized, the purification functions of the ecological system on nitrogen, phosphorus and organic matters are enhanced, finally, the purified water flows into the water storage area 4 through the perforated flower pipe 35 and can be reused in the aspects of farmland irrigation, road sprinkling, greening water and the like, and the water can overflow the water outlet pipe 41 to be discharged out of the system when the water yield is large.

Claims

1. The utility model provides a cascaded rural ecological sewage treatment system, includes interception district (1), settling zone (2), ecological treatment district (3), impoundment area (4), its characterized in that: each district is cascaded distribution from a left side to the right side along the drainage direction, by high to low interception district (1), settling zone (2), ecological treatment district (3) and water storage district (4) in proper order, the left side in interception district (1) is the end of intaking, the right of water storage district (4) is the end of giving out water.

2. The stepped rural sewage ecological treatment system according to claim 1, wherein: waterproof geotextile is laid in the walls of the interception area (1), the sedimentation area (2), the ecological treatment area (3) and the water storage area (4).

3. The stepped rural sewage ecological treatment system according to claim 1, wherein: the grating (11) is arranged on the upper surface of a stepped junction formed by the intercepting area (1) and the settling area (2), and grating holes are formed in the grating (11).

4. The stepped rural sewage ecological treatment system according to claim 3, wherein: the length of the grating (11) is equal to that of the stepped rural sewage ecological treatment system.

5. The stepped rural sewage ecological treatment system according to claim 1, wherein: sedimentation zone (2) upper surface with the lower surface parallel and level of interception district (1), the bottom has set up the bank angle from right to left in sedimentation zone (2), and mud pit (22) set up in sedimentation zone (2) and are located the leftmost end of sedimentation zone (2), and mud pump (23) set up in mud pit (22), even there are mud pipe (24) on mud pump (23), and mud pipe (24) extend to the sedimentation zone (2) outside, and overflow triangle weir (21) set up sedimentation zone (2) with the echelonment juncture upper surface that ecological treatment district (3) formed.

6. The stepped rural sewage ecological treatment system according to claim 5, wherein: the mud pit (22) is of a sinking structure.

7. The stepped rural sewage ecological treatment system according to claim 1, wherein: the upper surface of ecological treatment district (3) with settling zone (2) lower surface flushes, and overflow weir (36) set up ecological treatment district (3) with the echelonment juncture upper surface that retaining area (4) formed, ecological treatment district (3) divide into plant layer (31), gravel granular layer (32), quartz sand filter layer (33), artifical filter bed (34) from top to bottom, lay waterproof geotechnological cloth between each layer, and trompil floral tube (35) set up in artifical filter bed (34), set up the aperture on trompil floral tube (35).

8. The stepped rural sewage ecological treatment system according to claim 1, wherein: the upper surface of water storage area (4) with ecological treatment district (3) lower surface flushes, water storage area (4) bottom surface leftmost end has seted up sump (42), be provided with elevator pump (43) in sump (42), elevator pump (43) even have reuse water pipe (44), reuse water pipe (44) extend to the outside of water storage area (4), water storage area (4) upper portion rightmost side is equipped with overflow outlet pipe (41), overflow outlet pipe (41) extend to the outside of water storage area (4).

9. The stepped rural sewage ecological treatment system according to claim 8, wherein: the water collecting pit (42) is also of a sinking structure.