CN210825844U - Compound sewage treatment system - Google Patents

Abstract

The utility model discloses a compound sewage treatment system, including pretreatment unit, infiltration underground unit and ecological processing unit, pretreatment unit, infiltration underground unit and ecological processing unit transversely arrange in proper order and connect, and infiltration underground unit includes overburden, aerobic layer, anaerobic layer and degree of depth dephosphorization layer, and overburden, aerobic layer, anaerobic layer and degree of depth dephosphorization layer are arranged from last to down in proper order, and the volume ratio of aerobic layer, anaerobic layer and degree of depth dephosphorization layer is 2:1.5:1-3:2: 1. Has the advantages that: the whole facility can be buried underground, the occupied area is small, the operation cost is low, the maintenance and the management are simple and convenient, and the use is flexible; high-efficient good oxygen, anaerobic microbial inoculum among the infiltration unit can more effectual decomposition transform the organic matter in the sewage, and the degree of depth removes the phosphorus layer and turns into the phosphate with the phosphorus in the sewage, further gets rid of various pollutants through ecological processing unit again, uses through the cooperation of infiltration unit and ecological processing unit underground, and the quality of water that makes to discharge out is better, more is of value to the environmental protection.

Description

Compound sewage treatment system

Technical Field

The utility model relates to a sewage treatment technical field, concretely relates to compound sewage treatment system.

Background

Along with the development of rural economy, the living standard of rural areas is continuously improved, the discharge amount of rural domestic sewage is also continuously increased, and under the national emphasis on ecological environment, the rural sewage treatment is more and more emphasized by provinces and cities. The sewage treatment technology is various, mainly comprises a biological treatment technology (contact oxidation, SBR), an artificial wetland technology and a traditional subsurface infiltration technology, but the biological treatment technology has high operation cost and complex maintenance and management, the traditional subsurface infiltration technology and the artificial wetland technology have large occupied area and high manufacturing cost, the operation of the artificial wetland is limited by climatic conditions and is easy to breed mosquitoes, the structural layer in the traditional subsurface infiltration technology is complex, and the quality of discharged water is poor. Therefore, a more environment-friendly, economic, stable and feasible system solution is needed to be provided for domestic and rural sewage treatment, and the pollution problem of domestic sewage in villages and towns is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art and providing a compound sewage treatment system which is more economical, environment-friendly and more practical.

The purpose of the utility model is achieved through the following technical measures:

a composite sewage treatment system comprises a pretreatment unit, an underground infiltration unit and an ecological treatment unit, wherein the pretreatment unit, the underground infiltration unit and the ecological treatment unit are transversely and sequentially arranged and connected, the ecological treatment unit comprises a covering layer and an ecological layer, the underground infiltration unit comprises a covering layer, an aerobic layer, an anaerobic layer and a deep phosphorus removal layer, the covering layer, the aerobic layer, the anaerobic layer and the deep phosphorus removal layer are sequentially arranged from top to bottom, and the volume ratio of the aerobic layer to the anaerobic layer to the deep phosphorus removal layer is 2:1.5:1-3:2: 1.

Further: the aerobic layer comprises an artificial filter material or a natural filter material and a high-efficiency aerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency aerobic microbial agent is 6:1-8: 1.

Further: the anaerobic layer comprises an artificial filter material or a natural filter material and a high-efficiency anaerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency anaerobic microbial agent is 6:1-8: 1.

Further: the natural filter materials include, but are not limited to, fine sand, gravel, ash, crushed stone, cobblestone, and natural zeolite.

Further: the artificial filter material includes but is not limited to quartz sand, ceramsite, artificial zeolite and fly ash.

Further: the thickness of the aerobic layer and the anaerobic layer is 0.1m-0.3 m.

Further: the deep phosphorus removal layer comprises rock mineral materials and solid-liquid separation materials, and the thickness of the deep phosphorus removal layer is 0.1-0.3 m.

Further: the solid-liquid separation material comprises one or more of plant branches and leaves, rice husks, roots and natural soil.

Further: the pretreatment unit comprises a grating tank, a sedimentation tank, an anaerobic tank and an adjusting tank, wherein the grating tank, the sedimentation tank, the anaerobic tank and the adjusting tank are horizontally and sequentially arranged, and a lifting pump is arranged in the adjusting tank.

Further: the anaerobic tank is filled with elastic biological materials, and biological membranes are arranged on the elastic biological materials.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the whole facility can be completely buried underground, the occupied area is small, special land is not needed, the investment is small, the operation cost is low, the maintenance and the management are simple and convenient, the operation is stable, and the use is flexible; 2. the high-efficiency microbial agent in the subsurface infiltration unit can more effectively decompose and convert organic matters in sewage, deeply remove phosphorus layers and convert phosphorus in the sewage into phosphate, further remove various pollutants through the ecological treatment unit, and can make the discharged water better and more excellent through the mutually matched use of the subsurface infiltration unit and the ecological treatment unit, thereby being more beneficial to environmental protection.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

The system comprises a grid pond, a sedimentation pond, an anaerobic pond, an elastic biological material, a regulating pond, a lifting pump, an underground infiltration unit, an aerobic layer, an anaerobic layer, a deep phosphorus removal layer, an ecological treatment unit, a covering layer and a pretreatment unit, wherein the grid pond is 1, the sedimentation pond is 2, the anaerobic pond is 3, the elastic biological material is 4, the regulating pond is 5, the lifting pump is 6, the underground infiltration unit is 7, the aerobic layer is 8, the anaerobic layer is 9, the deep phosphorus removal layer is 10.

Detailed Description

In the embodiment, as shown in fig. 1, a composite sewage treatment system comprises apretreatment unit 14, anunderground infiltration unit 7 and anecological treatment unit 12, wherein thepretreatment unit 14, theunderground infiltration unit 7 and theecological treatment unit 12 are transversely and sequentially arranged and connected, thepretreatment unit 14, theunderground infiltration unit 7 and theecological treatment unit 12 are organically combined, pollutants are automatically adjusted and distributed among the units, and the long-term stable operation of the system is ensured, theecological treatment unit 12 comprises a coveringlayer 13 and anecological layer 11, theunderground infiltration unit 7 comprises acovering layer 13, anaerobic layer 8, ananaerobic layer 9 and a deepphosphorus removal layer 10, the coveringlayer 13, theaerobic layer 8, theanaerobic layer 9 and the deepphosphorus removal layer 10 are sequentially arranged from top to bottom, the volume ratio of theaerobic layer 8 to theanaerobic layer 9 to the deepphosphorus removal layer 10 is 2:1.5:1-3:2:1, the whole facility can be buried underground, the occupied area is small, special land is not needed, the investment is small, the operation cost is low, the maintenance and the management are simple and convenient, the operation is stable, and the use is flexible.

Theaerobic layer 8 comprises an artificial filter material or a natural filter material and a high-efficiency aerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency aerobic microbial agent is 6:1-8: 1.

Theanaerobic layer 9 comprises an artificial filter material or a natural filter material and a high-efficiency anaerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency anaerobic microbial agent is 6:1-8: 1.

High-efficient aerobic microbial inoculum and high-efficient anaerobic microbial inoculum inaerobic layer 8 and theanaerobism layer 9 can more effectual decomposition conversion organic matter in the sewage, further promote the quality of water of effluent.

The natural filter materials include, but are not limited to, fine sand, gravel, ash, crushed stone, cobblestone, and natural zeolite.

The artificial filter material includes but is not limited to quartz sand, ceramsite, artificial zeolite and fly ash.

The thickness of theaerobic layer 8 and theanaerobic layer 9 is 0.1-0.3 m.

The deepphosphorus removal layer 10 comprises rock mineral materials and solid-liquid separation materials, and the thickness of the deepphosphorus removal layer 10 is 0.1-0.3 m.

The solid-liquid separation material comprises one or more of plant branches and leaves, rice husks, roots and natural soil.

Phosphorus particles in the sewage are subjected to chemical precipitation with metal cations such as Fe, Al, Ca, Mg and the like in rock mineral materials to form insoluble phosphate precipitates, then phosphorus is removed from the sewage through solid-liquid separation, and finally the phosphorus is enriched in a phosphate mineral form and is further treated by anecological treatment unit 12 to reach the standard and be discharged.

Pretreatment unit 14 includes grid pond 1,sedimentation tank 2,anaerobism pond 3 and equalizingbasin 5, grid pond 1,sedimentation tank 2,anaerobism pond 3 and 5 levels of equalizing basin are transversely arranged in proper order, equalizingbasin 5 embeds there iselevator pump 6, and sewage is orderly through grid pond 1,sedimentation tank 2 andanaerobism pond 3 in proper order, filters earlier and decomposes partial pollutant, flows into equalizingbasin 5 again, and under the effect ofelevator pump 6 in equalizingbasin 5, sewage gets intounderground infiltration unit 7.

Theanaerobic tank 3 is filled with an elasticbiological material 4, a biological membrane is arranged on the elasticbiological material 4, and microorganisms on the membrane degrade pollutants in raw water through the actions of biological flocculation, adsorption, oxidation and the like.

TABLE 1 Experimental data for treating sewage by composite sewage treatment system

Serial number	Subsurface infiltration system feed water (mg/L)	Subsurface infiltration system effluent (mg/L)
			1	278	46
2	250	35
			3	320	48

The treatment system is used for treating sewage to reach the first-grade A standard of pollutant discharge of urban sewage treatment plants, and the treatment process comprises the following steps:

example 1

The sewage is transversely moved by apretreatment unit 14 to remove partial pollutants, under the action of alift pump 6, the sewage after pretreatment enters anunderground infiltration unit 7, the volume ratio of anaerobic layer 8, ananaerobic layer 9 and adeep dephosphorization layer 10 is 2:1.5:1, the thickness of theaerobic layer 8 is 0.3m, the volume ratio of a filter material (using natural filter materials: fine sand, gravel, ash and gravel) and a high-efficiency aerobic microbial inoculum in theaerobic layer 8 is 6:1, the thickness of theanaerobic layer 9 is 0.3m, the volume ratio of the filter material (using natural filter materials: cobblestone and natural zeolite) and the high-efficiency aerobic microbial inoculum in theanaerobic layer 9 is 6:1, the thickness of thedeep dephosphorization layer 10 is 0.3m, the solid-liquid separation material of thedeep dephosphorization layer 10 is plant branches and leaves, the sewage vertically passes through theaerobic layer 8, theanaerobic layer 9 and thedeep dephosphorization layer 10 of theunderground infiltration unit 7, and the pollutants are intercepted by each function, and partially pollutants are filtered, Adsorbing, decomposing and converting by microorganisms, finally entering theecological treatment unit 12, further purifying under the actions of filtration, adsorption, precipitation, ion exchange, plant absorption, microbial decomposition and the like of theecological treatment unit 12, and discharging the sewage which reaches the standard of first class A in the table 1 of discharge Standard of pollutants for municipal wastewater treatment plant GB 18918-2002.

Example 2

The sewage is transversely moved by apretreatment unit 14 to remove partial pollutants, under the action of alifting pump 6, the sewage after pretreatment enters anunderground infiltration unit 7, the volume ratio of anaerobic layer 8, ananaerobic layer 9 and a deepphosphorus removal layer 10 is 2.5:1.5:1, the thickness of theaerobic layer 8 is 0.2m, the volume ratio of a filter material (artificial filter material: quartz sand and ceramsite) in theaerobic layer 8 to a high-efficiency aerobic microbial inoculum is 7:1, the thickness of theanaerobic layer 9 is 0.2m, the volume ratio of the filter material (artificial filter material: artificial zeolite and fly ash) in theanaerobic layer 9 to the high-efficiency aerobic microbial inoculum is 7:1, the thickness of the deepphosphorus removal layer 10 is 0.2m, the solid-liquid separation material of the deepphosphorus removal layer 10 is plant branches and leaves and grain husks, the sewage is vertically structured in theaerobic layer 8, theanaerobic layer 9 and the deepphosphorus removal layer 10 of theunderground infiltration unit 7, and the pollutants are intercepted and partially filtered by each function, Adsorbing, decomposing and converting by microorganisms, finally entering theecological treatment unit 12, further purifying under the actions of filtration, adsorption, precipitation, ion exchange, plant absorption, microbial decomposition and the like of theecological treatment unit 12, and discharging the sewage which reaches the standard of first class A in the table 1 of discharge Standard of pollutants for municipal wastewater treatment plant GB 18918-2002.

Example 3

The sewage is transversely moved by apretreatment unit 14 to remove partial pollutants, under the action of alift pump 6, the pretreated sewage enters anaerobic layer 8, ananaerobic layer 9 and a deepphosphorus removal layer 10 of anunderground infiltration unit 7, the volume ratio of the pretreated sewage to theaerobic layer 8, theanaerobic layer 9 and the deepphosphorus removal layer 10 is 3:2:1, the thickness of theaerobic layer 8 is 0.1m, the volume ratio of a filter material (using natural filter materials, cobblestones and natural zeolite) in theaerobic layer 8 to a high-efficiency aerobic microbial inoculum is 8:1, the thickness of theanaerobic layer 9 is 0.1m, the volume ratio of a filter material (using artificial filter materials, quartz sand and ceramsite) in theanaerobic layer 9 to the high-efficiency anaerobic microbial inoculum is 8:1, the thickness of the deepphosphorus removal layer 10 is 0.1m, solid-liquid separation materials of the deepphosphorus removal layer 10 are roots, grain husks and natural soil, the sewage is vertically infiltrated in theaerobic layer 8, theanaerobic layer 9 and the deepphosphorus removal layer 10 of theunderground unit 7, and the pollutants are intercepted by the filter, Adsorbing, decomposing and converting by microorganisms, finally entering theecological treatment unit 12, further purifying under the actions of filtration, adsorption, precipitation, ion exchange, plant absorption, microbial decomposition and the like of theecological treatment unit 12, and discharging the sewage which reaches the standard of first class A in the table 1 of discharge Standard of pollutants for municipal wastewater treatment plant GB 18918-2002.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The utility model provides a compound sewage treatment system, includes pretreatment unit, infiltration unit and ecological processing unit, pretreatment unit, infiltration unit and ecological processing unit transversely arrange in proper order and connect, ecological processing unit includes overburden and ecological layer, its characterized in that: the subsurface infiltration unit comprises a covering layer, an aerobic layer, an anaerobic layer and a deep phosphorus removal layer, wherein the covering layer, the aerobic layer, the anaerobic layer and the deep phosphorus removal layer are sequentially arranged from top to bottom, and the volume ratio of the aerobic layer to the anaerobic layer to the deep phosphorus removal layer is 2:1.5:1-3:2: 1.

2. The compound sewage treatment system of claim 1, wherein: the aerobic layer comprises an artificial filter material or a natural filter material and a high-efficiency aerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency aerobic microbial agent is 6:1-8: 1.

3. The compound sewage treatment system of claim 1, wherein: the anaerobic layer comprises an artificial filter material or a natural filter material and a high-efficiency anaerobic microbial agent, and the volume ratio of the artificial filter material or the natural filter material to the high-efficiency anaerobic microbial agent is 6:1-8: 1.

4. The compound sewage treatment system according to claim 2 or 3, wherein: the natural filter material comprises one or more of but not limited to fine sand, gravel, ash, broken stone, cobblestone and natural zeolite.

5. The compound sewage treatment system according to claim 2 or 3, wherein: the artificial filter material comprises one or more of but not limited to quartz sand, ceramsite, artificial zeolite and fly ash.

6. The compound sewage treatment system of claim 1, wherein: the thickness of the aerobic layer and the anaerobic layer is 0.1-0.3 m.

7. The compound sewage treatment system of claim 1, wherein: the deep phosphorus removal layer comprises rock mineral materials and solid-liquid separation materials, and the thickness of the deep phosphorus removal layer is 0.1-0.3 m.

8. The compound sewage treatment system of claim 7, wherein: the solid-liquid separation material comprises one or more of plant branches and leaves, rice husks, roots and natural soil.

9. The compound sewage treatment system of claim 1, wherein: the pretreatment unit comprises a grating tank, a sedimentation tank, an anaerobic tank and an adjusting tank, wherein the grating tank, the sedimentation tank, the anaerobic tank and the adjusting tank are horizontally and sequentially arranged, and a lifting pump is arranged in the adjusting tank.

10. The compound sewage treatment system of claim 9, wherein: the anaerobic tank is filled with elastic biological materials, and biological membranes are arranged on the elastic biological materials.

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