CN211644787U - New rural domestic sewage anaerobic wetland ecological purification system - Google Patents

New rural domestic sewage anaerobic wetland ecological purification system Download PDF

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Publication number
CN211644787U
CN211644787U CN201922456117.1U CN201922456117U CN211644787U CN 211644787 U CN211644787 U CN 211644787U CN 201922456117 U CN201922456117 U CN 201922456117U CN 211644787 U CN211644787 U CN 211644787U
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tank
anaerobic
water
domestic sewage
stage
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徐德镇
徐杰
周艳
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Chengdu Tianfu Longzhong Ecological Technology Development Co ltd
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Chengdu Tianfu Longzhong Ecological Technology Development Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The utility model relates to an anaerobic wetland ecological purification system for domestic sewage in new rural areas, which comprises a deslagging grid groove, a sand setting adjusting hydrolysis acidification tank, a multistage anaerobic tank, a sedimentation tank, a filter tank, an artificial wetland and a reuse water tank which are sequentially communicated; biogas generated by the multistage anaerobic tank is introduced into a gas-water separation device, a water outlet of the gas-water separation device is communicated with a sand setting adjusting hydrolysis acidification tank, an air outlet of the gas-water separation device is communicated with a desulfurization device, and an air outlet of the desulfurization device is connected with an air storage tank. The utility model combines the anaerobic and the wet land, the pollutant removing rate is high, and the effluent quality is good. Anaerobic treatment is adopted, energy consumption is low, aeration is not needed in the treatment process, the pollution of odor diffusion to the surrounding atmospheric environment is avoided, and no noise is generated; the energy consumption is low, the gas production rate is good, the produced biogas is used as fuel, the productivity and efficiency are improved, and the pollution is reduced; the treated and purified water reaches the discharge standard and is reused as water for cleaning, cooling and agricultural irrigation, or is stored as water for fire fighting and water for fish culture in ecological ponds.

Description

New rural domestic sewage anaerobic wetland ecological purification system
Technical Field
The utility model relates to a useless sewage treatment purifies technical field, especially relates to new rural domestic sewage anaerobism wetland ecological purification system.
Background
The shortage of water resources and water pollution in China severely restrict the healthy and continuous development of the overall economy of China, the lag of infrastructure and low management level inhibit the improvement and the improvement of the quality of life of residents in rural areas, the country is increasing the strength to support new rural water improvement projects, and the water environment treatment in rural areas should become an important component part of the comprehensive environment treatment in China.
In vast rural areas, a great amount of production waste (sewage) water discharged by products produced by taking animals and plants as raw materials (including livestock, poultry, fishery and required feeds) and domestic sewage generated by human activities exist. The sewage is discharged without being treated, and the environment is polluted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a new rural domestic sewage anaerobism wetland ecological purification system can purify new rural domestic sewage.
In order to achieve the above purpose, the utility model discloses an ecological technology, the scheme is as follows:
the system for ecologically purifying the anaerobic wetland of the domestic sewage in the new rural area comprises a deslagging grid groove, a sand setting adjusting hydrolysis acidification tank, a multistage anaerobic tank, a sedimentation tank, a filtering tank, an artificial wetland and a reuse water tank which are sequentially communicated;
biogas generated by the multistage anaerobic tank is introduced into a gas-water separation device, a water outlet of the gas-water separation device is communicated with a sand setting adjusting hydrolysis acidification tank, an air outlet of the gas-water separation device is communicated with a desulfurization device, and an air outlet of the desulfurization device is connected with an air storage tank.
Further, a sludge pump is arranged at the bottom of the sedimentation tank, the outlet of the sludge pump is connected with a drain pipe, the drain pipe is connected with a sludge concentration tank, and the liquid outlet of the sludge concentration tank is communicated with a sand settling regulation hydrolysis acidification tank.
Furthermore, an inclined tube area is arranged in the sedimentation tank, and the effluent at the top of the anaerobic tank is drained to the lower part of the inclined tube area through a pipeline.
Preferably, the multi-stage anaerobic tank is a two-stage anaerobic tank.
Or the multistage anaerobic tank is a three-stage anaerobic tank.
Preferably, the three-stage anaerobic tank is respectively: the anaerobic composite sludge bed comprises a first-stage anaerobic composite sludge bed high-efficiency anaerobic tank, a second-stage down-flow type fixed biological membrane high-efficiency anaerobic tank and a third-stage up-flow type anaerobic filtration high-efficiency anaerobic tank.
Wherein, a pressure regulating tank is arranged between the anaerobic tanks.
Furthermore, a sampling well is arranged between the artificial wetland and the reuse water pool.
Furthermore, a water distributor is arranged at the bottom of the settling sand adjusting hydrolysis acidification tank, a porous filler is arranged above the water distributor, and the porous filler is a plastic foam porous filler, an elastic filler or a BF filler.
Furthermore, a slag removal grid groove and a sand setting adjusting hydrolysis acidification tank are connected with the groove.
Compared with the prior art, the utility model discloses have following effect of showing:
1, the utility model combines the anaerobic and the wetland, so that the pollutant removal rate is high and the effluent quality is good; the energy consumption is low, the gas production rate is good, the produced biogas is used as fuel, the productivity and efficiency are improved, and the pollution is reduced; the treated and purified water reaches the discharge standard and is reused as water for cleaning, cooling and agricultural irrigation, or is stored as water for fire fighting and water for fish culture in ecological ponds;
2, the utility model adopts anaerobic treatment, has low energy consumption, low investment, low operation cost and simple management, generates little sludge which is only aerobic 1/6-1/10, and has little corresponding treatment cost;
3, the treatment process of the utility model does not need aeration, thereby avoiding the pollution of odor diffusion to the surrounding atmospheric environment and generating no noise;
4, the artificial wetland is arranged to enable water flow to flow below the ground surface, the influence of climate is small, the sanitary condition is good, the ground can be used as landscape greening land, and the removal effect on organic pollutants, heavy metals and the like is good.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of a three-stage anaerobic tank;
fig. 3 is a sectional view of the constructed wetland;
fig. 4 is a plan view of a water distributor of the artificial wetland;
fig. 5 is a plan view of the grit conditioning hydrolysis acidification tank.
Detailed Description
In order to make the objects, ecological solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.
As shown in figure 1, the utility model discloses a new rural domestic sewage anaerobism wetland ecological purification system, including slag removal grid groove 1, the sand setting regulation hydrolysis acidification pond 2, multistage anaerobism pond, sedimentation tank 6, filtering ponds 5, constructed wetland 7 and the reuse pond 9 that communicate in proper order.
The sand setting adjusting hydrolysis acidification tank 2 is a combined tank integrating slag removal, sand setting, homogenization/hydrolysis acidification and PH adjusting modification functions. In order to exert the high-efficiency function of the anaerobic hydrolysis acidification process, the tank is provided with a water distributor in the activated sludge at the bottom; the filler is arranged above the activated sludge, and is plastic foam porous filler, elastic filler or BF filler. The sand setting adjustment hydrolysis acidification tank 2 ensures that the quality of the treated inlet water is uniform and the water quantity is relatively stable, and can improve the rate of degrading pollutants in the subsequent biochemical treatment tank.
As shown in figure 5, a deslagging grid groove 101 is arranged at the inlet of the settling sand adjusting hydrolysis acidification tank 2, and a manual or mechanical grid and a 10-20-mesh stainless steel wire net are arranged in the deslagging grid groove 101 to realize deslagging. The grid sets up twice, and one clearance is 10mm, and another clearance is 5mm, and thick sediment in order to avoid blockking up follow-up processing facility, equipment can be got rid of to the sewage flow through the grid, does benefit to and influences the treatment effect. In order to save cost, manual periodical slag removal can be adopted. The settling sand adjusting hydrolysis acidification tank 2 is tightly connected with a deslagging grid groove 101.
As shown in fig. 1, this embodiment includes a two-stage anaerobic tank; a first-stage anaerobic tank 3 and a second-stage anaerobic tank 4.
In another embodiment, as shown in fig. 2, the multi-stage anaerobic tank is a three-stage anaerobic tank. The three-stage anaerobic tank comprises: the anaerobic composite sludge bed comprises a first-stage anaerobic composite sludge bed high-efficiency anaerobic tank, a second-stage down-flow type fixed biological membrane high-efficiency anaerobic tank and a third-stage up-flow type anaerobic filtration high-efficiency anaerobic tank.
The first stage anaerobic composite sludge bed efficient anaerobic tank is a 'UASB + AF' reactor formed by combining an activated sludge bed of an up-flow anaerobic sludge bed reactor with an anaerobic filter and a down-flow anaerobic filter material biomembrane bed and matching with a water distributor, and is called first stage UASB + AF for short. The lower part of the reactor is 1.0m active sludge bed, the bed bottom is provided with a water distributor connected with the water from the forebay, and the upper part of the reactor is provided with a filtering (filling) material biomembrane bed of 1.0-3.0 m. The above dimensions are references provided by the present embodiment, and the specific dimensions should be determined according to the water volume and the effective water depth of the pool.
The water distributor at the bottom of the sludge bed can digest the activated sludge from bottom to top and make the fully activated sludge bed enrich, acclimate and propagate the granular sludge in the metabolism.
The core of the anaerobic filter and the down-flow anaerobic filter is a filtering (filling) material biomembrane bed, and the wastewater plays a key role no matter passes through the biomembrane bed in an up-flow and down-flow mode, so that the anaerobic filter does not consume energy, generates the biogas CH4, and is simple to manage after entering normal operation.
The second-stage high-efficiency anaerobic tank is a down-flow type fixed biological membrane high-efficiency anaerobic tank, which is called a second-stage DSFF anaerobic tank for short; the third-stage high-efficiency anaerobic tank is an up-flow type anaerobic filtration high-efficiency anaerobic tank, and is called a third-stage AF anaerobic tank for short. The anaerobic granular sludge is enriched in the anaerobic tank, so that the unit volume load and the pollutant removal rate are greatly improved, the tank volume can be reduced, the occupied area is reduced, and the investment and operation cost are reduced.
Biogas generated by the multistage anaerobic tank is introduced into a gas-water separation device 16, a water outlet of the gas-water separation device 16 is communicated with a deslagging grid groove 1, an exhaust port of the gas-water separation device 16 is communicated with a desulfurization device 17, and an exhaust port of the desulfurization device 17 is connected with a gas storage tank 19. The produced marsh gas can be burnt.
An inclined pipe area 61 is arranged in the sedimentation tank 6, and the effluent at the top of the last stage anaerobic tank is drained to the lower part of the inclined pipe area 61 through a pipeline. The bottom of the sedimentation tank 6 is provided with a sludge pump 62, the outlet of the sludge pump 62 is connected with a blow-off pipe, the blow-off pipe is connected with a sludge concentration tank 13, and the liquid outlet of the sludge concentration tank 13 is communicated with a sand setting adjusting hydrolysis acidification tank 2.
The supernatant fluid of the sedimentation tank 6 automatically flows into the filter tank 5, is filtered by the filter tank 5 and then flows into the large-area artificial wetland 7.
As shown in fig. 3, the artificial wetland 7 comprises a rammed earth layer 71, a C15 cushion layer 72 with the thickness of 100mm, an SBS waterproof layer 73, a C20 concrete bottom plate 74 with the thickness of 200mm, a special filler 75 for wetland with the thickness of phi 50-100 mm, a geotextile 76 and special planting soil 77 for wetland plants with the thickness of 200mm, which are arranged from bottom to top. The thickness of each layer can be reasonably set according to actual needs. The wetland special packing 75 can be pebbles, broken stones, river sand and the like; can be used for planting swamp plants such as Ecliptae herba, Cyperus rotundus, Thymus floridus, Heimeria, Dahua, etc. As shown in fig. 3 and 4, a water distributor 78 is arranged in the wetland special packing 75, a main pipe of the water distributor 78 is communicated with a ditch 79, overflow ports with the width of 5mm and the depth of 4cm are cut on branch pipes 781 of the water distributor 78 at intervals of 5cm, and geotechnical cloth seal heads are wrapped outside the overflow ports.
The effluent of the artificial wetland 7 enters a reuse water tank 9, a reuse water pump 91 is installed in the reuse water tank 9, and the reuse water pump 91 is used for pumping out the water in the reuse water tank 9 for cleaning, cooling and agricultural irrigation, or storing the water for fire fighting, fish culture in ecological ponds and the like.
The principle of the utility model is as follows:
domestic sewage enters a slag removal grid groove 1, and after the sewage passes through a grid net, coarse and sinkable solids and floating objects are intercepted; the sewage automatically flows into a sand setting adjustment hydrolysis acidification tank 2, the sand setting adjustment hydrolysis acidification tank 2 carries out sediment precipitation and water quality and water quantity adjustment on the sewage, macromolecular organic matters are converted into micromolecular organic matters through hydrolysis acidification and are decomposed into stable sediments, meanwhile, the blockage of the subsequent artificial wetland filler is avoided, and denitrification is carried out to convert organic nitrogen into ammonia nitrogen;
the effluent of the sand setting adjusting hydrolysis acidification tank 2 automatically flows into a water distributor of the bottom area of a first-stage UASB + AF anaerobic tank, the water distributor distributes sewage to a high-activity anaerobic sludge bed and an anaerobic composite bed reaction area, so that high-concentration organic matters in the sewage are treated, the treated sewage flows into a pressure regulating tank and then sequentially passes through a second-stage DSFF anaerobic tank, the pressure regulating tank and a third-stage AF anaerobic tank for treatment; decomposing most organic matters in the sewage under the action of anaerobic bacteria in the third-stage anaerobic tank; discharging the water treated by the microorganisms at the front section into a sedimentation tank 6, and automatically flowing clear water precipitated by the sedimentation tank 6 into a filtering tank 5 to remove residual organic matters in the sewage; the water filtered by the filtering tank 5 enters the artificial wetland, the artificial wetland controllably delivers the sewage to the wetland filler by simulating and strengthening the natural wetland function, the surface of the wetland is planted with aquatic plants, in the process that the sewage flows along a certain direction, under the triple actions of the filler, the plants and the microorganisms, the pollutants in the sewage are filtered by the filler, absorbed by the plants and adsorbed and degraded by the microorganisms to realize the high-efficiency purification of the sewage, the organic pollutants and impurities in the sewage are basically removed at the section under the adsorption and absorption action of the plants and the soil, and the effluent can be directly used for agricultural irrigation.
And the effluent of the artificial wetland 7 enters a reuse water tank 9 for water storage. And the sludge in the anaerobic tank and the sedimentation tank 6 is discharged into a sludge concentration tank 13, clear liquid in the sludge concentration tank 13 is introduced into a sand setting adjustment hydrolysis acidification tank 2 to continue carrying out microbial treatment, and the solid in the sludge concentration tank 13 is manually transported and treated.
The use method of the utility model is described as follows:
domestic sewage is subjected to two deslagging processes of setting a grid clearance from 10mm to 5mm, then is filtered by a stainless steel wire net of 10-20 meshes, and then enters a sand settling, adjusting, hydrolyzing and acidifying tank 2;
the sand setting adjustment hydrolysis acidification tank 2 ensures that after the biomass organic wastewater is hydrolyzed and acidified for 2.5 to 5.0 hours, the COD, BOD and SS are respectively removed by about 40 percent, 30 percent and 80 percent and then enter the post-treatment, and the effect of the stage is fully utilized when the method is applied, thereby being very beneficial to the later anaerobic treatment. The reactor is combined with a water collecting chamber, a homogenizing adjusting chamber and a pressure adjusting chamber of an anaerobic tank for water treatment into a whole, so that the integration of multiple processes and functions can be realized, the reactor is reduced, and the investment, operation and management costs are saved.
The total tank volume of the three-stage anaerobic tank is operated at normal temperature: v = Q × 1.5 × a, a = 3-10; when BOD is less than or equal to 200 mg/L, a is taken as 3; when BOD is more than or equal to 200 mg/L, a is more than 3.
After hydrolysis and three-stage anaerobic treatment, most of biomass organic wastewater in domestic sewage meets the requirement of irrigation water, even better, and can reach standard discharge or reuse after being treated by filtration and artificial wetland. The effluent is particularly reused as cleaning, cooling and agricultural irrigation water according to local conditions or stored as fire-fighting water, water for fish culture in ecological ponds and the like.
The sludge generated in each pool is turbid in effluent according to the operation for 1 year to no more than 2 years, and is pumped by a sludge pump pipe to be transported to other places needing to be used as strains, or used as agricultural and forestry fruit and vegetable fertilizers, or used for garbage field treatment. In practical application, sludge is inoculated, cultured and domesticated, so that the sludge can be quickly started and normally operated.
The utility model combines the anaerobic and the wetland, the pollutant removal rate is high, and the effluent quality is good; the energy consumption is low, the gas production rate is good, the produced biogas is used as fuel, the productivity and efficiency are improved, and the pollution is reduced; anaerobic treatment, low energy consumption, low investment, low operating cost and simple management, and the generated sludge is little and is only aerobic 1/6-1/10, and the corresponding treatment cost is also low; the artificial wetland is arranged to enable water flow to flow below the ground surface, the influence of climate is small, the sanitary condition is good, the ground can be used as landscape greening land, and the removal effect on organic pollutants, heavy metals and the like is good.
The present invention is capable of other embodiments and its several details are capable of modification and variation and can be made by those skilled in the art without departing from the spirit and essential attributes of the invention.

Claims (10)

1. New rural domestic sewage anaerobism wetland ecological clean system, its characterized in that: comprises a deslagging grid groove, a sand setting adjusting hydrolysis acidification tank, a multi-stage anaerobic tank, a sedimentation tank, a filter tank, an artificial wetland and a reuse water tank which are communicated in sequence;
biogas generated by the multistage anaerobic tank is introduced into a gas-water separation device, a water outlet of the gas-water separation device is communicated with a sand setting adjusting hydrolysis acidification tank, an air outlet of the gas-water separation device is communicated with a desulfurization device, and an air outlet of the desulfurization device is connected with an air storage tank.
2. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: the sludge pump is established to the sedimentation tank bottom, and sludge pump exit linkage blow off pipe, blow off union coupling sludge thickening tank, sludge thickening tank's liquid outlet and sand setting are adjusted hydrolysis-acidification pond and are communicated.
3. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: an inclined tube area is arranged in the sedimentation tank, and the effluent at the top of the anaerobic tank is drained to the lower part of the inclined tube area through a pipeline.
4. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: the multi-stage anaerobic tank is a two-stage anaerobic tank.
5. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: the multistage anaerobic tank is a three-stage anaerobic tank.
6. The new rural domestic sewage anaerobic wetland ecological purification system of claim 5, characterized in that: the three-stage anaerobic tank comprises: the anaerobic composite sludge bed comprises a first-stage anaerobic composite sludge bed high-efficiency anaerobic tank, a second-stage down-flow type fixed biological membrane high-efficiency anaerobic tank and a third-stage up-flow type anaerobic filtration high-efficiency anaerobic tank.
7. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, 4, 5 or 6, characterized in that: a pressure regulating tank is arranged between the anaerobic tanks.
8. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: a sampling well is arranged between the artificial wetland and the reuse water pool.
9. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: the bottom of the settling sand adjusting hydrolysis acidification tank is provided with a water distributor, a porous filler is arranged above the water distributor, and the porous filler is a plastic foam porous filler, an elastic filler or a BF filler.
10. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: the slag removal grid groove is connected with the sand setting adjusting hydrolysis acidification tank.
CN201922456117.1U 2019-12-30 2019-12-30 New rural domestic sewage anaerobic wetland ecological purification system Active CN211644787U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112266076A (en) * 2020-10-23 2021-01-26 广东石油化工学院 Artificial wetland system for nitrogen and phosphorus removal and treatment method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112266076A (en) * 2020-10-23 2021-01-26 广东石油化工学院 Artificial wetland system for nitrogen and phosphorus removal and treatment method thereof

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