CN101538106B - Energy-free sewage treatment plant - Google Patents

Abstract

The invention discloses a sewage treatment device without energy consumption, which comprises a pool body and a cover plate. battery board; the body of the pool is sequentially divided into an anaerobic decarbonization area, an aerobic nitrification area and a sludge sedimentation area by partition plates; an ecological wetland is provided outside the pool. The device of the present invention has the advantages of no energy consumption, effective removal of various pollutants in domestic sewage, no need for reflux of sludge, maximum reduction of sludge, and green environment, and uses the natural purification ability of organisms to further remove nitrogen, Phosphorus pollutants.

Description

No energy consumption sewage treatment device

technical field

The invention relates to a sewage treatment device, in particular to a non-energy-consuming sewage treatment device with decarbonization, denitrification and dephosphorization functions.

Background technique

At present, for small-scale sewage treatment facilities, due to the small amount of sewage to be treated, if the traditional aerobic process is adopted, several necessary treatment structures such as aeration tanks, sedimentation tanks, and sludge concentration tanks must be installed. Sludge return pump and other power equipment, the investment cost per ton of water is very high, and it is also prone to sludge swelling and other phenomena. At the same time, the aerobic process requires an aerator to supply oxygen, which increases power consumption and thus increases treatment costs. Therefore, it is not necessary Suitable for small-scale sewage treatment facilities.

The utility model with the patent number 200520020368.0 discloses an integrated self-reflux sewage biological decarbonization and denitrification equipment, which removes two types of pollutants (organic carbon pollutants and nitrogen-containing pollutants) in domestic sewage using different process equipment. The device includes a treatment tank, and a "V"-shaped sludge bed filter is arranged in the treatment tank to divide the treatment tank into an aerobic zone and an anaerobic zone. The sewage inlet is set at the lower part of the anaerobic zone, a partition wall is set between the aerobic zone and the anaerobic zone, an aeration device is installed at the bottom of the aerobic zone, and the lower part of the sedimentation zone is an inclined mud bucket, which is connected with the aerobic zone and inclined. The mud hopper is set to make the settled sludge slide down to the bottom of the aerobic zone by its own gravity, so as to realize the self-reflux of the sludge. An overflow weir is installed on the upper part of the sedimentation zone to facilitate the smooth flow of water separated from the sludge.

This technical solution uses electric energy to drive the aeration device, which consumes a lot of energy, and does not effectively remove phosphorus-containing pollutants in domestic sewage, which easily causes eutrophication of water bodies. At the same time, the aerobic area is directly connected to the sedimentation area, that is, the effluent and sludge return flow are in the same area. When the amount of treated water is large, that is, when the rising velocity of the water entering the sedimentation area is fast, the sludge cannot be returned in time, resulting in sludge It accumulates in the sedimentation area, resulting in the phenomenon of sludge floating.

The invention patent with the patent number 200710068353.5 discloses a sewage treatment device with denitrification function, including a pool body and a cover plate. The pool body is divided into anaerobic carbon removal area, aerobic nitrification area and anaerobic denitrification area by partitions in turn. In the anaerobic decarbonization zone, there are several ascending compartments and descending compartments separated by upper baffles and lower baffles, and fillers are filled and fixed in the ascending compartments; the aerobic nitrification zone is composed of aeration chambers and sedimentation chambers. The aeration chamber and the sedimentation chamber are equipped with flow partitions and deflectors. The aeration device is installed at the bottom of the aeration chamber. The aeration device is connected with an external air compressor. There are several An ascending compartment and a descending compartment separated by upper and lower baffles, the ascending compartment is filled and fixed with packing; the cover plate is provided with several inoculation holes and exhaust holes. The device does not need to reflux the sludge, minimize the amount of sludge, and can flexibly adjust the number of cycles according to the quality of the influent water, but it is not completely energy-free.

Contents of the invention

The invention provides a non-energy-consuming aerator that uses solar power to drive an aerator, effectively removes carbon, nitrogen, and phosphorus-containing pollutants in domestic sewage, and efficiently removes sedimentation, aeration, sludge self-reflux, and ecological wetlands. integrated sewage treatment plant.

A sewage treatment device without energy consumption, comprising a pool body, a cover plate, a solar cell panel and an ecological wetland, the pool body is provided with a cover plate, the solar cell panel is arranged on the cover plate; the two ends of the pool body are respectively provided with water inlets and The water outlet, the body of the pool is divided into anaerobic carbon removal area, aerobic nitrification area and sludge sedimentation area by partitions in turn; The rising compartment and the descending compartment are formed, and the rising compartment is filled with fixed packing; the anaerobic decarbonization zone and the aerobic nitrification zone are equipped with deflectors; the bottom of the aerobic nitrification zone is equipped with an aerator, and the aerator is connected with the external air The press is connected and driven by solar panel power generation; the aerobic nitrification zone and the sludge sedimentation zone are separated by a baffle and a flow divider; the lower part of the sludge sedimentation zone is equipped with a mud hopper sloping plate, and there are several sludge discharges at the bottom The upper end is provided with an overflow weir, and the outlet overflow weir is connected to the water outlet; an ecological wetland is provided outside the pool.

The ecological wetland can be arranged around the whole pool body, or only on one side of the pool body. In the ecological wetland, there is a water distribution tank at one end close to the water outlet, and a water collection tank at the other end away from the water outlet. The inner side of the water distribution tank and the water collection tank is covered with small holes and filled with gravel. The terrain on one side of the tank is higher than that on the side of the sump, guiding the water to flow from the distribution tank through the vegetation area of the ecological wetland to the sump, and finally flow out from the drain.

One side of the cover plate is provided with an inspection hole and an exhaust hole, and the solar panel is arranged on the cover plate to avoid the inspection hole and the exhaust hole, so as to facilitate maintenance and exhaust.

The fixed filler is in the shape of a hollow sphere, and the microbes are easy to form a film, and the start-up is fast, and the natural filler of bamboo fiber can be used.

The lower end of the deflector between the aerobic nitrification zone and the anaerobic carbon removal zone is connected with a deflector inclined plate at an angle of 120-135 degrees to the horizontal plane to prevent the air from the aeration tank from entering the anaerobic carbon removal zone.

The distance between the baffle plate and the flow divider determines the flow velocity of the water flow. If the distance is too small, the resulting resistance will affect the circulation of the sludge. If the distance is too large, it will affect the effective utilization of the volume of the reactor. The distance is determined by the sewage to be treated. The flow rate of hydraulic descent here is determined, and the general flow rate is controlled at 0.1-0.8m/s.

The flow divider separating the aerobic nitrification zone and the sludge sedimentation zone is composed of two vertical dividers and two oblique deflectors. The vertical partition and the inclined deflector are arranged at intervals, the inclined deflector connected between the two vertical partitions forms an angle of 30-45 degrees with the horizontal plane, and the other vertical partition connected to the lower end of the vertical partition below The oblique guide plate forms an angle of 100-125 degrees with the horizontal plane, and the mud-water mixture aerated in the aerobic nitrification area forms a vortex to avoid disturbance to the sludge sedimentation area.

The height of the top of the baffle that separates the aerobic nitrification zone and the sludge sedimentation zone is lower than the height of the upper end of the outlet overflow weir, and higher than the height of the lower end of the nearby baffle to ensure sludge circulation.

The setting of the height of the sludge discharge hole is an important parameter to determine the sludge concentration of the aeration tank. The height of the sludge discharge hole can be designed after the sludge concentration of the aeration tank is determined. Drain to the sludge discharge hole, generally it is advisable to set the sludge discharge hole at a distance of 1/4-1/3 from the bottom of the sludge sedimentation area.

The angle setting of the sloping plate of the mud hopper is to make the sludge separated from the mud and water in the sludge sedimentation area automatically slide down to the bottom of the sedimentation area and then enter the aeration area, so the angle of the sloping plate is preferably 100-125 degrees from the horizontal.

The width ratio of the ascending compartment and the descending compartment in the anaerobic carbon removal zone is 1-5:1, the carbon removal effect of the anaerobic decarbonization zone mainly depends on the ascending compartment, and the descending compartment has a diversion effect, It is used to extend the water flow path and enhance the full contact between the sewage and the microorganisms attached to the spherical packing. Therefore, the width ratio of the ascending compartment and the descending compartment needs to be adjusted appropriately. The ratio of 1-5:1 can not only meet the treatment effect, but also The overall processing efficiency of the device can be improved.

The vegetation area of the ecological wetland is covered with gravel, coarse sand and fine sand layer by layer, and plants such as cattail grass and reed are planted on it.

The surroundings of the ecological wetland can be poured with concrete to prevent water from flowing out of the ecological wetland.

In the anaerobic carbon removal area, up and down baffles are mainly used to extend the water flow path and strengthen the full contact between the sewage and the microorganisms attached to the spherical packing.

In the aerobic nitrification area and sludge sedimentation area, a uniquely designed sludge automatic return device is used to fully mix the mud and water in the aerobic nitrification area, the mud and water in the sludge sedimentation area are separated, and the sludge returns to the bottom of the sedimentation area to dissolve into one. , using solar power to drive the aerator in the aerobic nitrification zone, truly clean and energy-free.

In the ecological wet area, the biological natural purification ability of cattail grass, reed and other plants is used, and the physical, chemical and biological synergies of soil, artificial medium, plants and microorganisms are used to further treat sewage and sludge. It also avoids unnecessary contact of sewage, sludge, etc. with the solar panel, and protects the solar panel.

Compared with the traditional process, the device of the present invention has the advantages of no energy consumption, effective removal of various pollutants in domestic sewage, no need for backflow of sludge, maximum reduction of sludge, and green environment. The removal of nitrogen and phosphorus pollutants in sewage is in line with the themes of energy conservation, greening and removal of nitrogen and phosphorus pollution that my country is gradually paying attention to.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of device of the present invention;

Fig. 2 is a top view structural schematic diagram of the device of the present invention.

Detailed ways

As shown in Figures 1-3, a non-energy-consuming sewage treatment device includes a pool body 19, a cover plate 17, a solar panel 28 and an ecological wetland 27. The two ends of the pool body 19 are respectively provided with a water inlet 1 and a water outlet 18. The tank body 19 is sequentially divided into an anaerobic decarbonization zone 2, an aerobic nitrification zone 3 and a sludge sedimentation zone 4 by partitions.

The anaerobic carbon removal zone 2 is alternately provided with several upper baffles 7 and lower baffles 6, and the upper baffles 7 and the lower baffles 6 divide the anaerobic carbon removal zone 2 into several ascending compartments and descending chambers. In the compartment, the rising compartment is filled with hollow spherical bamboo fiber natural filler 5 . The width ratio of the ascending compartment and the descending compartment is selected as 2:1 or 4:1.

The anaerobic carbon removal zone 2 and the aerobic nitrification zone 3 are separated by a deflector 8, the upper end of the deflector 8 is connected to the cover plate 17, and the lower end does not touch the bottom of the pool. flow ramp.

An aerator 9 is installed at the bottom of the aerobic nitrification zone 3, and the aerator 9 is connected with an external air compressor, and the solar panel 28 generates electricity for aeration.

The solar panel 28 is located on the side of the cover plate 17 without the inspection hole 15 and the exhaust hole 16 .

The aerobic nitrification zone 3 and the sludge sedimentation zone 4 are separated by a divider 10, and there are gaps between the upper end of the divider 10 and the cover plate, and the lower end and the tank body, and two vertical dividers and two oblique diversion plates board composition. There is an inclined deflector connected between the two vertical partitions, forming an angle of 30-45 degrees with the horizontal plane, and another inclined deflector connected to the lower end of the vertical partition below, forming an angle of 100-125 degrees with the horizontal plane horn.

The bottom of the sludge settling area 4 is provided with an inwardly inclined mud bucket sloping plate 13, and the mud hopper sloping plate 13 forms an angle of 100-125 degrees with the horizontal plane.

The sludge settling area 4 is 1/4-1/3 away from the bottom and is provided with a number of sludge discharge holes 12, and the sludge discharge is connected by pipelines.

The sludge settling area 4 is provided with a baffle 11 , the top of the baffle 11 is connected with the cover plate, and the height of the bottom of the baffle 11 is lower than the top of the baffle 10 . The distance between the baffle 11 and the baffle 10 is determined by the hydraulic descending velocity of the sewage to be treated here, so that the hydraulic descending velocity is controlled at 0.1-0.8 m/s.

An outlet overflow weir 14 is provided at the water outlet of the sludge settling area 4 , and the height of the upper end of the outlet overflow weir 14 is higher than that of the upper end of the divider 10 .

The outlet overflow weir 14 is terminated with a water outlet 18 .

Pool body 19 is provided with ecological wetland 27 around, and ecological wetland 27 is poured with concrete all around, water outlet 18 connects aqueduct 22 to ecological wetland 27 near water outlet 18 water distribution tank 21.

The other end of the ecological wetland 27 has a sump 25, the inner side of the water distribution tank 21 and the sump 25 is covered with small holes 24, and is filled with gravel 29, and the outside of the sump 25 is provided with a drainage outlet 26; Higher than the sump 25 sides.

In the vegetation area 23 of the ecological wetland, paving stones 30 , coarse sand 31 and fine sand 32 are laid layer by layer from bottom to top, and cattail grass and reed 33 are planted thereon.

The sewage to be treated flows into the pool body 19 from the water inlet 1, and first enters the anaerobic carbon removal zone 2. The upper baffle 7 and the lower baffle 6 divide the anaerobic carbon removal zone 2 into several ascending compartments and descending compartments. Sewage flows through each compartment to drive the sludge deposited at the bottom to activate the sludge. At the same time, the sewage fully contacts with the microorganisms attached to the spherical filling body for decarbonization treatment. The sewage bypasses the deflector 8 and enters the aerobic nitrification zone 3. An aerator 9 is arranged at the bottom of the aerobic nitrification zone 3. The aerator 9 is connected to an external air compressor, and the solar panel 28 generates electricity for aeration. The mud-water mixture fully mixed in the aerobic nitrification zone 3 enters the sludge sedimentation zone 4 through the divider 10 for sludge-water separation, and the sludge is deposited on the mud hopper ramp 13 of the sludge sedimentation zone 4 . The sludge flows back to the bottom of the sludge settling area 4 along the sloping plate 13 of the mud hopper, and then enters the aerobic nitrification area 3, and the sludge is discharged at regular intervals; The flow weir 14 enters the water outlet 18, enters the water distribution tank 21 of the ecological wetland 27 along the water guide pipe 22, and the sewage flows through the small hole 24 of the water distribution tank 21, flows through the vegetation area 23 of the ecological wetland 27, and passes through the small hole 24 of the water collection tank 25 Enter the sump 25, and finally discharge the treated sewage that reaches the national standard into rivers and lakes through the outlet 26.

Claims (6)

1. an energy-free sewage treatment plant comprises pond body and cover plate, and the pond body is provided with cover plate, and body two ends, pond are respectively equipped with water-in and water outlet, it is characterized in that: described cover plate is provided with solar panel; Described pond body inner route clapboard is divided into anaerobism de-carbon district, aerobic nitrification district and sludge settling district successively; Anaerobism de-carbon district is provided with several rising compartment and decline compartments of being divided into by last traverse baffle and following traverse baffle, fills fixedly filler in the rising compartment; Be provided with flow deflector between anaerobism de-carbon district and aerobic nitrification zone; Aerator is equipped with in the bottom in the aerobic nitrification district, and aerator links to each other with outside air compressor machine, is driven by the solar panel generating; Aerobic nitrification district and sludge settling interval are separated by traverse baffle and cutoff board; Bottom, sludge settling district is provided with the bucket swash plate, and the bottom is provided with several mudholes, and the upper end is provided with the water outlet overflow weir, and the water outlet overflow weir is connected water outlet; The external ecological wetland that is provided with in pond;

Described cutoff board is made of two vertical clapboards and two oblique flow deflectors, vertical clapboard and oblique flow deflector are provided with at interval, the swash plate flow deflector that is connected with between two vertical clapboards becomes 30-45 degree angle with horizontal plane, be positioned at another oblique flow deflector that the vertical clapboard lower end of below is connected with and become 100-125 degree angle with horizontal plane; Mudhole is located at 1/4-1/3 place, sludge settling offset bottom.

2. energy-free sewage treatment plant as claimed in claim 1 is characterized in that: described ecological wetland is arranged on an external week or the side in pond.

3. energy-free sewage treatment plant as claimed in claim 2, it is characterized in that: the inherent end near water outlet of described ecological wetland is provided with the cloth tank, be provided with water leg away from the water outlet the other end, the inboard of cloth tank and water leg is covered with aperture, and fill with gravel, the outside of water leg is provided with water port; The physical features of cloth tank one side is higher than water leg one side.

4. energy-free sewage treatment plant as claimed in claim 1 is characterized in that: a side is provided with access opening and venting hole on the described cover plate, and solar panel is located at a side of avoiding access opening and venting hole on the cover plate.

5. energy-free sewage treatment plant as claimed in claim 1 is characterized in that: the height of described cutoff board upper end is lower than the height of water outlet overflow weir upper end, is higher than the height of traverse baffle lower end.

6. energy-free sewage treatment plant as claimed in claim 1 is characterized in that: successively lay slabstone, coarse sand and fine sand in the vegetation region of described ecological wetland from bottom to up, plantation plant on it.