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

Abstract

The utility model relates to a new rural domestic sewage anaerobic wetland ecological purification system. The biogas produced by the multi-stage anaerobic tank is passed into the gas-water separation device, the water outlet of the gas-water separation device is connected to the sand settling adjustment hydrolysis acidification tank, the exhaust port of the gas-water separation device is connected to the desulfurization device, and the exhaust of the desulfurization device is connected. connection to the air tank. The utility model adopts the combination of anaerobic and wetland, the pollutant removal rate is high, and the effluent quality is good. It adopts anaerobic treatment, low energy consumption, no aeration in the treatment process, avoids the pollution of odor diffusion to the surrounding atmospheric environment, and does not generate any noise; it has low energy consumption, good gas production, and generates biogas as fuel to increase production capacity. reduce pollution; treat and purify to meet discharge standards, reuse it as water for cleaning, cooling, and agricultural irrigation, or store it as water for firefighting, and water for fish farming in ecological ponds.

Description

New rural domestic sewage anaerobic wetland ecological purification system

technical field

The utility model relates to the technical field of waste/sewage treatment and purification, in particular to a new rural domestic sewage anaerobic wetland ecological purification system.

Background technique

The lack of water resources and water pollution in China are seriously restricting the healthy and sustainable development of my country's overall economy. The lagging infrastructure and low management level have inhibited the improvement and improvement of the quality of life of residents in rural areas. The state is stepping up efforts to support new rural water reform projects. Water environment management in rural areas should become an important part of my country's comprehensive environmental management.

In the vast rural areas, there are a lot of production waste (sewage) water discharged from the production of products (including livestock, poultry, aquaculture and required feed) using animals and plants as raw materials, as well as domestic sewage generated by human activities. These sewage are discharged without treatment, which will pollute the environment.

Utility model content

The utility model aims to provide a new rural domestic sewage anaerobic wetland ecological purification system, which can purify the new rural domestic sewage.

In order to achieve the above object, the ecological technology adopted by the present utility model, the scheme is as follows:

New rural domestic sewage anaerobic wetland ecological purification system, including slag removal grid tank, sand settling adjustment hydrolysis acidification tank, multi-stage anaerobic tank, sedimentation tank, filter tank, artificial wetland and reuse tank connected in sequence;

The biogas generated by the multi-stage anaerobic tank is passed into the gas-water separation device, the water outlet of the gas-water separation device is connected to the sand settling adjustment hydrolysis acidification tank, the exhaust port of the gas-water separation device is connected to the desulfurization device, and the exhaust port of the desulfurization device is connected. Connect the air tank.

Further, a sludge pump is provided at the bottom of the sedimentation tank, the outlet of the sludge pump is connected to a sewage pipe, and the sewage pipe is connected to a sludge thickening tank, and the liquid outlet of the sludge thickening tank is communicated with the sand settling adjustment, hydrolysis and acidification tank.

Further, an inclined pipe area is arranged in the sedimentation tank, and the effluent from the top of the anaerobic tank is drained to the bottom of the inclined pipe area through a pipeline.

Preferably, the multi-stage anaerobic pond is a two-stage anaerobic pond.

Alternatively, the multi-stage anaerobic tank is a three-stage anaerobic tank.

Preferably, the three-stage anaerobic tanks are respectively: a first-level anaerobic composite sludge bed high-efficiency anaerobic tank, a second-level down-flow fixed biofilm high-efficiency anaerobic tank, and a third-level up-flow anaerobic filtration high-efficiency anaerobic tank Oxygen pool.

Among them, a pressure regulating tank is set between the anaerobic tanks.

Further, sampling wells are set between the constructed wetland and the reuse pool.

Further, a water distributor is arranged at the bottom of the sand settling adjustment hydrolysis and acidification tank, and a porous filler is arranged above the water distributor, and the porous filler is a plastic foam porous filler, or an elastic filler, or a BF filler.

Further, the slag-removing grid groove and the sand settling adjustment hydrolysis and acidification tank are connected together.

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

1, the utility model adopts the combination of anaerobic and wetland, the pollutant removal rate is high, and the effluent water quality is good; its energy consumption is low, the gas production is good, and the biogas is generated as fuel, so as to realize the efficiency increase of production capacity and reduce pollution; the treatment and purification meet the emission standard. , reused as water for cleaning, cooling, agricultural irrigation, or stored as water for firefighting, water for fish farming in ecological ponds;

2. The utility model adopts anaerobic treatment, which has low energy consumption, low investment, low operating cost, simple management, and produces little sludge, which is only 1/6-1/10 of that of aerobic treatment, and the corresponding treatment cost is also low;

3. No aeration is required in the treatment process of the utility model, which avoids the pollution of the surrounding atmospheric environment caused by the diffusion of odor, and does not generate any noise;

4. Constructed wetlands allow water to flow below the surface, less affected by climate, good sanitation conditions, and the ground can be used for landscape greening, which has a good removal effect on organic pollutants and heavy metals.

Description of drawings

Fig. 1 is the structural representation of the present utility model;

Figure 2 is a schematic diagram of a three-stage anaerobic tank;

Figure 3 is a sectional view of a constructed wetland;

Fig. 4 is the plan view of the water distributor of constructed wetland;

Figure 5 is a plan view of a grit regulated hydrolysis acidification tank.

Detailed ways

In order to make the objectives, ecological technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the new rural domestic sewage anaerobic wetland ecological purification system disclosed by the present utility model includes a slag removal grid tank 1, a sand settling adjustment hydrolysis acidification tank 2, a multi-stage anaerobic tank, and a sedimentation tank 6 connected in sequence. , filter tank 5, constructed wetland 7 and reuse pool 9.

The sand settling adjustment hydrolysis and acidification tank 2 is a combined tank which integrates the functions of slag removal and settling, homogenization/hydrolysis acidification and pH adjustment and modification. And in order to play the high-efficiency function of the anaerobic hydrolysis and acidification process, the pool is equipped with a water distributor in the activated sludge at the bottom; the activated sludge is filled with fillers, and the fillers are plastic foam porous fillers, elastic fillers, or BF fillers. The sand settling adjusts the hydrolysis and acidification tank 2 to make the water quality of the treated influent uniform and the water quantity relatively stable, and can improve the ratio of the subsequent biochemical treatment tank to degrade the pollutants.

As shown in Figure 5, a slag removal grid slot 101 is set at the entrance of the sand settling adjustment hydrolysis acidification tank 2, and a manual or mechanical grid and a 10-20 mesh stainless steel wire mesh are arranged in the slag removal grid slot 101 to achieve slag removal. There are two grids, one with a gap of 10mm and the other with a gap of 5mm. The sewage flowing through the grid can remove the coarse slag to avoid clogging the subsequent treatment facilities and equipment, which is conducive to affecting the treatment effect. In order to save costs, manual slag cleaning can be used on a regular basis. The sand settling adjustment hydrolysis and acidification tank 2 is arranged in close proximity to the slag removal grid tank 101 .

As shown in FIG. 1 , this embodiment includes two-stage anaerobic tanks; the first-level anaerobic tank 3 and the second-level anaerobic tank 4 are respectively.

As shown in Figure 2, in another embodiment, the multi-stage anaerobic pond is a three-stage anaerobic pond. The three-level anaerobic tanks are: the first-level anaerobic composite sludge bed high-efficiency anaerobic tank, the second-level down-flow fixed biofilm high-efficiency anaerobic tank, and the third-level up-flow anaerobic filtration high-efficiency anaerobic tank.

The first-stage anaerobic composite sludge bed high-efficiency anaerobic tank is a combination of activated sludge bed and anaerobic filter, and down-flow anaerobic filter filter material biofilm bed of the up-flow anaerobic sludge bed reactor. The water distributor is composed of a "UASB+AF" reactor, referred to as the first-stage UASB+AF. The lower 1.0m of the reactor is the activated sludge bed, and the bottom of the bed is installed with a water distributor connected to the incoming water from the forepond, and above it is a 1.0-3.0m filter (packing) biofilm bed. The above dimensions are provided for reference in this embodiment, and the specific dimensions should be determined according to the amount of water and the effective water depth of the pool.

The water distributor at the bottom of the sludge bed makes the sewage digest the activated sludge from bottom to top, and allows the fully activated sludge bed to enrich and domesticate the granular sludge during metabolism.

The core of anaerobic filter and downflow anaerobic filter is the filter (packing) biofilm bed. Whether the wastewater passes through it in the way of upflow or downflow, it plays a key role, and it does not consume energy and produce Biogas CH4 is easy to manage after entering normal operation.

The second-level high-efficiency anaerobic tank is a downflow fixed biofilm high-efficiency anaerobic tank, referred to as the second-level DSFF anaerobic tank; the third-level high-efficiency anaerobic tank is an up-flow anaerobic filtration high-efficiency anaerobic tank, referred to as the third-level AF. Anaerobic pool. The anaerobic granular sludge is safely enriched in the anaerobic tank, which can greatly improve the unit volume load and pollutant removal rate, reduce the tank capacity, reduce the floor space, and reduce investment and operating costs.

The biogas produced by the multi-stage anaerobic tank is passed into the gas-water separation device 16. The water outlet of the gas-water separation device 16 is connected to the slag removal grid tank 1, and the exhaust port of the gas-water separation device 16 is connected to the desulfurization device 17. The desulfurization device The exhaust port of 17 is connected to the air tank 19. The biogas produced is combustible.

The sedimentation tank 6 is provided with an inclined pipe area 61, and the effluent from the top of the last stage of anaerobic tank is drained to the bottom of the inclined pipe area 61 through pipes. The bottom of the sedimentation tank 6 is provided with a sludge pump 62, the outlet of the sludge pump 62 is connected to a sewage pipe, and the sewage pipe is connected to the sludge thickening tank 13, and the liquid outlet of the sludge thickening tank 13 is communicated with the sand settling adjustment, hydrolysis and acidification tank 2 .

The supernatant of the sedimentation tank 6 flows into the filter tank 5 by itself, and after being filtered by the filter tank 5 , flows into the large-area constructed wetland 7 .

As shown in Figure 3, the constructed wetland 7 includes a plain soil compacted layer 71, a 100mm-thick C15 cushion layer 72, an SBS waterproof layer 73, a 200mm-thick C20 concrete bottom plate 74, a 600mm-thickness, and a φ50-φ100mm wetland special filler set from bottom to top 75. Geotextile 76, 200mm thick wetland plant special planting soil 77. The thickness of each layer can be reasonably set according to actual needs. Wetland special filler 75 can be selected from pebbles, gravel, river sand, etc.; can be planted with wetland plants such as parasol, sedge, reliflower, black algae, and big drift. As shown in Figures 3 and 4, there is a water distributor 78 in the wetland special filler 75, the main pipe of the water distributor 78 is connected to the water inlet 79, and the branch pipe 781 of the water distributor 78 is cut with a 5cm interval of 5mm wide and 4cm deep. Geotextile cover for mouth wrapping.

The water from the constructed wetland 7 enters the recycling pool 9, and a recycling water pump 91 is installed in the recycling pool 9. The recycling water pump 91 is used to extract the water in the recycling pool 9 for cleaning, cooling, agricultural irrigation water, or storage for fire fighting water. , Ecological pond fish water, etc.

The principle of the present utility model is as follows:

The domestic sewage enters the slag removal grid tank 1. After the sewage passes through the grid, its coarse, sinkable solids and floating objects are intercepted; the self-flow enters the sand settling adjustment hydrolysis acidification tank 2, and the sand settling adjustment hydrolysis acidification tank 2 Sludges the sewage. Sand precipitation, water quality and quantity regulation, and macromolecular organic matter hydrolyzed and acidified into small molecular organic matter, which is decomposed into stable sediment, while avoiding the blockage of subsequent constructed wetland fillers, and denitrification to convert organic nitrogen into ammonia nitrogen;

The effluent from sand settling adjustment hydrolysis and acidification tank 2 flows into the water distributor in the bottom area of the first-stage UASB+AF anaerobic tank. The high-concentration organic matter in the tank is treated, and the treated sewage flows into the pressure regulating tank, and then goes through the second-level DSFF anaerobic tank, the pressure regulating tank and the third-level AF anaerobic tank for treatment; in the third-level anaerobic tank, anaerobic bacteria Most of the organic matter in the sewage is decomposed under the action of the filter; the water after the previous microbial treatment is discharged into the sedimentation tank 6, and the clean water after the sedimentation in the sedimentation tank 6 flows into the filter tank 5 to remove the residual organic matter in the sewage; after the filter tank 5 is filtered The artificial wetland simulates and strengthens the function of natural wetlands, and controls the distribution of sewage to wetland fillers, and aquatic plants are planted on the wetland surface. During the process of sewage flowing in a certain direction, the physical properties of fillers, plants and microorganisms are affected. Under the triple action of , chemistry and biology, the pollutants in sewage are efficiently purified by filler filtration, plant absorption, and microbial adsorption and degradation. Organic pollutants and impurities in sewage are basically absorbed by plants and soil. This section is removed, and the effluent can be directly used for agricultural irrigation.

The effluent from the constructed wetland 7 enters the recycling pool 9 for water storage. The sludge in the anaerobic tank and the sedimentation tank 6 is discharged into the sludge concentration tank 13, and the clear liquid in the sludge concentration tank 13 is introduced into the sedimentation adjustment, hydrolysis and acidification tank 2 to continue microbial treatment, and the solids in the sludge concentration tank 13 Manual outbound disposal.

The following introduces the use method of the present utility model:

The domestic sewage is slag-removed in two steps from 10 mm to 5 mm by setting the grid gap, and then filtered by a 10-20 mesh stainless steel wire mesh, and the sand particles enter the tank, and then enter the sand settling adjustment hydrolysis and acidification tank 2;

Settling sand adjusts hydrolysis and acidification tank 2. After the biomass organic wastewater is hydrolyzed and acidified for 2.5-5.0 hours, COD, BOD and SS are removed by about 40%, 30% and 80% respectively and then enter the post-treatment, which should be fully utilized in application. This effect at this stage is very beneficial to the later anaerobic treatment. Combining it with the water collection, homogenization adjustment and anaerobic tank pressure regulating room of water treatment can realize multi-process, functional integration, reduce the reactor, and save investment, operation and management costs.

The total tank capacity of the three-stage anaerobic tank runs at room temperature as: V=Q×1.5×a, a=3-10; when BOD≤200㎎/L, a is 3; when BOD≥200㎎/L, a Take 3 or more.

After hydrolysis and tertiary anaerobic treatment, the biomass organic wastewater in the domestic sewage has reached the requirements of irrigation water, or even better, followed by filtration and artificial wetland treatment, which can be discharged or reused up to the standard. According to local conditions, the effluent can be reused as water for cleaning, cooling and agricultural irrigation, or stored as water for firefighting, water for fish farming in ecological ponds, etc.

Sludge produced by each pool may be turbid after 1 year of operation and no more than 2 years, and the sludge pump pipe is used to pump and transport it to other places that need to be used as bacteria, or agricultural, forestry, fruit and vegetable fertilizer, or transported to the garbage dump for disposal. In practical application, inoculation, cultivation and domestication of sludge should be adopted, so that it can start up and operate normally.

The utility model adopts the combination of anaerobic and wetland, the pollutant removal rate is high, the effluent water quality is good; the energy consumption is low, the gas production is good, the biogas is generated as fuel, the production capacity is increased, the pollution is reduced; the anaerobic treatment, the low energy consumption, Low investment, low operating cost, simple management, and very little sludge, only 1/6-1/10 of aerobic, corresponding treatment cost is also low; the setting of artificial wetland makes the water flow below the surface, which is affected by the climate. The impact is small, the sanitary conditions are good, the ground can be used for landscape greening, and the removal effect of organic pollutants and heavy metals is good.

The present utility model may also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present utility model without departing from the spirit and essence of the present utility model.

Claims (10)

1. The new rural domestic sewage anaerobic wetland ecological purification system is characterized in that: including the slag removal grid groove, the sand settling adjustment hydrolysis acidification tank, the multistage anaerobic tank, the sedimentation tank, the filter tank, the artificial wetland and the return tank which are connected in turn. pool; The biogas generated by the multi-stage anaerobic tank is passed into the gas-water separation device, the water outlet of the gas-water separation device is connected to the sand settling adjustment hydrolysis acidification tank, the exhaust port of the gas-water separation device is connected to the desulfurization device, and the exhaust port of the desulfurization device is connected. Connect the air tank. 2. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: a sludge pump is provided at the bottom of the sedimentation tank, the sludge pump outlet is connected to a sewage pipe, and the sewage pipe is connected to a sludge concentration tank, The liquid outlet of the sludge concentration tank is communicated with the sand settling adjustment, hydrolysis and acidification tank. 3. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, wherein the sedimentation tank is provided with an inclined pipe area, and the effluent at the top of the anaerobic tank is drained to the bottom of the inclined pipe area through a pipe. 4 . The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1 , wherein the multi-stage anaerobic pond is a two-stage anaerobic pond. 5 . 5 . The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1 , wherein the multi-stage anaerobic pond is a three-stage anaerobic pond. 6 . 6. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 5, characterized in that: the three-level anaerobic tanks are respectively: the first-level anaerobic composite sludge bed high-efficiency anaerobic tank, the second High-efficiency anaerobic tank with down-flow fixed biofilm and third-level up-flow 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 , wherein a sampling well is set between the artificial wetland and the reuse pool. 9 . 9. The new rural domestic sewage anaerobic wetland ecological purification system according to claim 1, characterized in that: a water distributor is arranged at the bottom of the sand settling adjustment, hydrolysis and acidification tank, and a porous filler is arranged above the water distributor, and the porous filler is a plastic foam porous filler, or elastic filler, or 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 and the sand settling adjustment hydrolysis and acidification tank are connected together.

Images