CN215365108U

CN215365108U - Artificial floating bed for rural sewage treatment

Info

Publication number: CN215365108U
Application number: CN202120857713.5U
Authority: CN
Inventors: 王伟亚; 侯红勋; 范信生; 鲍韬; 张辉; 蒋涛
Original assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Current assignee: Cecep Guozhen Environmental Protection Technology Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-12-31
Anticipated expiration: 2031-04-22

Abstract

The utility model discloses an artificial floating bed for rural sewage treatment, which comprises a floating bed main body, wherein the artificial floating bed main body comprises a floating bed frame, and a gravel purification area, a plant purification area and a filler purification area which are sequentially arranged in the floating bed frame from top to bottom, a plurality of metal cages fixedly connected with the floating bed frame are arranged in the gravel purification area, gravel fillers are filled in the metal cages, emergent aquatic plants are arranged in the plant purification area, the emergent aquatic plants upwards penetrate through the gravel purification area from the plant purification area and extend to the upper part of the floating bed frame, the filler purification area comprises the filler frame fixedly connected with the floating bed frame, and light fillers are filled in the filler frame. Can improve the pollutant removal efficiency, stabilize the effluent quality and enhance the impact load resistance of the biochemical tank.

Description

Artificial floating bed for rural sewage treatment

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an artificial floating bed for rural sewage treatment.

Background

Rural sewage is sewage different from sewage of cities and medium and small towns, has the outstanding characteristics of multiple points, wide area, dispersion, small amount and the like, and has strong biodegradability of water quality and high nitrogen and phosphorus content of sewage.

The rural small-sized sewage treatment plant has small scale, usually has the design scale of 500-1000m3/d, the change of the water quality and the water quantity of inlet water is large, the conventional activated sludge method has low energy efficiency, low activated sludge concentration, unstable water quality of outlet water and weak impact load resistance, and a modification method suitable for improving the quality and the efficiency of the rural sewage treatment plant needs to be researched.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an artificial floating bed for rural sewage treatment, which solves the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

the artificial floating bed for rural sewage treatment comprises a floating bed main body, wherein the artificial floating bed main body comprises a floating bed frame, and a gravel purification area, a plant purification area and a filler purification area which are sequentially arranged in the floating bed frame from top to bottom, a plurality of metal cages connected with the frame are arranged in the gravel purification area, gravel filler is filled in the metal cages, emergent aquatic plants are arranged in the plant purification area, the emergent aquatic plants upwards penetrate through the gravel purification area from the plant purification area and extend to the upper part of the floating bed frame, the filler purification area comprises the filler frame fixedly connected with the floating bed frame, light filler is filled in the filler frame, and the density of the light filler is smaller than that of water.

As a further scheme of the utility model: the lower end of the floating bed frame is fixedly connected with supporting legs, and the floating bed frame, the supporting legs, the gravel purification area frame and the filler frame of the floating bed main body are made of stainless steel.

As a further scheme of the utility model: a gravel purification area frame fixedly connected with the floating bed frame is arranged in the gravel purification area, and the metal cage is arranged in the gravel purification area frame.

As a further scheme of the utility model: the height of the gravel purification area is 0.15-0.2m, the gravel filler is oval or nearly round gravel blocks, the particle size is 0.03-0.05m, and the stacking porosity is 30-40%; the bottom area of the metal cage is 0.04-0.10m2, the height of the metal cage is 0.15-0.2m, the metal cage is formed by weaving metal wires, the upper end of the metal cage is open, and meshes of the rest surfaces are smaller than the particle size of the gravel filler.

As a further scheme of the utility model: the plant purification area is 0.4-0.6m high, the filler purification area is 1.8-2m high, and the plant purification area and the filler purification area are separated by a filler frame.

As a further scheme of the utility model: the light filler is at least one of suspended filler and elastic filler.

Compared with the prior art, the utility model has the beneficial effects that:

1. the attached biological membranes of the gravel purification area, the plant purification area and the filler purification area in the artificial floating bed are combined with the activated sludge in the biochemical pool, so that the microbial biomass in the biochemical pool is increased, and the attached biological membranes are absorbed by the root system of the plant purification area, so that the pollutant removal efficiency can be improved, the effluent quality can be stabilized, and the impact load resistance of the biochemical pool can be enhanced.

2. The artificial floating bed adopts tall and big emergent aquatic plants with developed root systems, has strong pollution resistance and flooding resistance, has strong absorption capacity on pollutants, particularly nitrogen elements and phosphorus elements, and strengthens the nitrogen and phosphorus removal of rural sewage treatment plants; the plant purification area space meets the requirement of root hair extension, the root hair of the emergent aquatic plant extends into the plant purification area and cannot be wound with the lower filler, the root hair is prevented from being broken and the filler is prevented from losing efficacy, and the root hair and the filler utilization rate is maintained.

3. The gravel filler and the emergent aquatic plant stem in the artificial floating bed are fixed in the movable metal cage, and the metal cage is lifted out, so that the plant and the gravel filler can be taken out, and the plant harvesting and gravel replacement are facilitated; the loose gravel filler meets the growth space of the plant stems, and the size of the metal cage is suitable for the planting density of good growth of emergent aquatic plants.

Drawings

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

In the figure: 1-floating bed main body, 2-gravel purification area, 21-gravel purification area frame, 22-metal cage, 23-gravel filler, 3-plant purification area, 31-emergent aquatic plant, 32-root block, 33-root system, 4-filler purification area, 41-filler frame, 42-light filler, 5-floating bed frame and 6-supporting leg.

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.

Referring to fig. 1, in the embodiment of the present invention, an artificial floating bed for rural sewage treatment includes a floating bed main body 1, the artificial floating bed main body includes a floating bed frame 5, and a gravel purification area 2, a plant purification area 3, and a filler purification area 4, which are sequentially disposed in the floating bed frame 5 from top to bottom, and the lower end of the floating bed frame 5 is fixedly connected with support legs 6.

A plurality of gravel purification area frames 21 connected with the floating bed frame 5 are arranged in the gravel purification area 2, metal cages 22 are arranged in the gravel purification area frames 21, gravel fillers 23 are filled in the metal cages 22, the height of the gravel purification area 2 is 0.15-0.2m, the gravel fillers 23 are oval or nearly round gravel blocks, the particle size is 0.03-0.05m, and the stacking porosity is 30-40%; the bottom area of the metal cage 22 is 0.04-0.10m2, the height is 0.15-0.2m, the metal cage 22 is woven by metal wires, the upper end is open, and the meshes of the rest surfaces are smaller than the particle size of the gravel packing 23. The emergent aquatic plants 31 are arranged in the plant purifying area 3, the emergent aquatic plants 31 upwards penetrate through the gravel purifying area 2 from the plant purifying area 3 and extend to the upper part of the floating bed frame 5, in the embodiment, the stems of the emergent aquatic plants 31 are fixed in the gravel purifying area 2 through the gravel packing 23, the root blocks 32 of the emergent aquatic plants 31 are arranged at the lower part of the metal cage 22, the root hairs 33 extend into the plant purifying area 3 from the gravel purifying area 2, the height of the plant purifying area 3 is 0.4-0.6m, the height of the filler purifying area 4 is 1.8-2m, and the space between the plant purifying area 3 and the filler purifying area 4 is blocked by the packing frame 41. The filler purification area 4 comprises a filler frame 41 fixedly connected with the floating bed frame 5, the filler frame 41 is filled with light filler 42, the density of the light filler 42 is less than that of water, and the light filler 42 is at least one of suspended filler and elastic filler. In addition, the floating bed frame 5, the support legs 6, the gravel purification area frame 21 and the packing frame 41 of the floating bed main body 1 are all made of stainless steel.

In this embodiment, the floating bed frame 5, the support legs 6, the gravel purification area frame 21 and the packing frame 41 are made of stainless steel to prevent the floating bed from being damaged and causing secondary pollution due to corrosion in sewage treatment. The bottom area of the metal cages 22 is about 0.04-0.10m2, and one plant is planted in each metal cage 22, so that the planting density of emergent aquatic plants is 9-25 plants/m 2, and the illumination and ventilation of the plants are facilitated.

The artificial floating bed is placed in a biochemical pool of a rural sewage treatment plant, mixed liquor in the pool is immersed in the gravel filler 23 which is loosely stacked, a biological membrane is formed on the surface of the filler after being contacted for a certain time, microbial flora in the biological membrane degrades organic pollutants in sewage through assimilation and dissimilation, ammonia nitrogen is converted into nitrate nitrogen in an environment with sufficient dissolved oxygen, and the nitrate nitrogen is further converted into nitrogen in an anoxic environment, so that the aim of denitrification is fulfilled, in addition, the gravel filler 23 can adsorb phosphorus elements, the phosphorus content in the biochemical pool is reduced, the gravel filler is removed from the sewage through filler replacement, the particle size of the gravel filler 23 is selected to be 0.03-0.05m, the stacking porosity is 30-40%, the filling pore blockage is mainly facilitated to delay the filler pore blockage, the plant growth is facilitated, the flow velocity is maintained to be stable, and the mixed liquor is facilitated to be mixed.

Emergent aquatic plants in the plant purification area 3 act by themselves and the plants and microorganisms act synergistically, and the emergent aquatic plants 31 generate energy through photosynthesis and respiration in the growth process to absorb nitrogen elements and phosphorus elements in sewage from root areas, so that the emergent aquatic plants are indispensable nutrient elements for promoting the continuous growth of the plants; emergent aquatic plants can change the structure and the form according to the growth environment, adapt to the sewage environment, improve the self resistance and the pollution resistance and form a complete ventilation system; meanwhile, the root hairs 33 of the emergent aquatic plants 31 continuously grow, extend and increase in the plant purification area 3 to form a large specific surface area filter layer, and adsorb, enrich, filter and settle pollutants, the developed root systems of the emergent aquatic plants provide habitat for microorganisms, dissolved oxygen is released into the mixed liquid through the root hairs, and a large number of microorganisms are adsorbed and attached to the surfaces of the root hairs to form a biological membrane to absorb and degrade the pollutants in the water; the microorganism degrades pollutants to generate inorganic nitrogen and phosphorus, and is beneficial to the absorption and utilization of plant roots.

The purification process of the filler purification area 4 is similar to that of the gravel purification area 2, mixed liquor and activated sludge in the biochemical pool are contacted with the light filler 42, and pollutants and microorganisms are adsorbed and attached to the surface of the filler to form a biological film. The microorganisms in the biological membrane adsorb and degrade various pollutants, and the degradation efficiency of the activated sludge is enhanced.

In the using process of the floating bed in the embodiment, the floating bed main body 1 is installed near the pool wall of a biochemical pool of a rural sewage treatment plant and submerged at the position of 0.2m under water, and the biochemical pool is an activated sludge biochemical reaction pool such as AAO (anaerobic-anoxic-oxic) pool, an oxidation ditch and the like, at the moment, stems and leaves of emergent aquatic plants 31 treated in the whole artificial floating bed are above the water surface, and the others are below the water surface, and the bottom of a filler purification area 4 of the artificial floating bed is 2.55-3.00m below the water surface according to the effective water depth of the biochemical pool, so that the influence on the flow state of water at the bottom of the biochemical pool is small, short flow cannot be generated, and the phenomenon of poor removal of pollutants is caused. Meanwhile, the application mode also avoids the generation of floating plants such as duckweed caused by the over-slow flow rate of the water surface.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An artificial floating bed for rural sewage treatment comprises a floating bed main body (1) and is characterized in that the artificial floating bed main body comprises a floating bed frame (5), and a gravel purification area (2), a plant purification area (3) and a filler purification area (4) which are sequentially arranged in the floating bed frame (5) from top to bottom, a plurality of metal cages (22) connected with the floating bed frame (5) are arranged in the gravel purification area (2), gravel fillers are filled in the metal cages (22), emergent aquatic plants (31) are arranged in the plant purification area (3), the emergent aquatic plants (31) upwards penetrate through the gravel purification area (2) from the plant purification area (3) and extend to the upper part of the floating bed frame (5), the filler purification area (4) comprises a filler frame (41) fixedly connected with the floating bed frame (5), and light fillers (42) are filled in the filler frame (41), the lightweight filler (42) has a density less than that of water.

2. The artificial floating bed for rural sewage treatment according to claim 1, wherein the lower end of the floating bed frame (5) is fixedly connected with supporting legs (6), and the floating bed frame (5), the supporting legs (6), the gravel purification area frame (21) and the packing frame (41) of the floating bed main body (1) are all made of stainless steel.

3. The artificial floating bed for rural sewage treatment according to claim 1, wherein a gravel purification area frame (21) fixedly connected with the floating bed frame (5) is arranged in the gravel purification area (2), and the metal cage (22) is installed in the gravel purification area frame (21).

4. An artificial floating bed for rural sewage treatment according to claim 1, wherein the height of the gravel purification zone (2) is 0.15-0.2m, the gravel packing (23) is oval or nearly round gravel blocks with a particle size of 0.03-0.05m and a bulk porosity of 30-40%; the bottom area of the metal cage (22) is 0.04-0.10m2, the height is 0.15-0.2m, the metal cage (22) is formed by weaving metal wires, the upper end of the metal cage is open, and meshes of the rest surfaces are smaller than the particle size of the gravel filler (23).

5. The artificial floating bed for rural sewage treatment according to claim 1, wherein the height of the plant purification area (3) is 0.4-0.6m, the height of the filler purification area (4) is 1.8-2m, and the plant purification area (3) and the filler purification area (4) are blocked by a filler frame (41).

6. The artificial floating bed for rural sewage treatment according to claim 1, wherein the light filler (42) is at least one of a suspended filler and an elastic filler.