CN211999385U

CN211999385U - Multistage sewage purification pond

Info

Publication number: CN211999385U
Application number: CN202020606902.0U
Authority: CN
Inventors: 黄建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-11-24
Anticipated expiration: 2030-04-21

Abstract

A multi-stage sewage purification tank is provided with a biological contact aeration tank, a bottom layer waterweed purification tank, a plant wetland filter tank and an effluent sedimentation tank in sequence from a water inlet end to a water outlet end; the bottom of the biological contact aeration tank is horizontal, the tank wall (1) is arranged obliquely outwards, and a biological membrane (2) is laid along the tank wall at the lower side of the revetment of the tank wall; at least four in-situ purifiers (3) are arranged at the bottom of the biological contact aeration tank at intervals along the clockwise ring; the bottom layer waterweed purification pond is planted with algae plants; submerged plants are planted in the plant wetland filter tank. The utility model provides a multistage sewage purification pond, purifying effect is good, can effectual decomposition organic matter in the sewage, makes the ammonia nitrogen content of aquatic show the reduction, simultaneously can the effectual transparency that promotes the water.

Description

Multistage sewage purification pond

Technical Field

The utility model relates to a sewage treatment device field, especially a multistage sewage purification pond.

Background

The ecological treatment technology for introducing the domestic sewage of the villages and towns into the pond is characterized in that an in-situ direct purifier and a biological carrier are installed in the pond through artificial strengthening action on the basis of a traditional biological contact oxidation pond method, aquatic plants are planted, strains, aquatic animals and the like are put in the aquatic plants, an artificial floating island is built to plant underwater aquatic weeds, and finally a stable ecological system is formed. The sewage in villages and towns flows into the low-lying pond along the trend through the ditch, and good ecological landscape effect is created when the inflow is treated in a centralized manner.

Disclosure of Invention

The utility model aims at providing a multistage sewage treatment pond forms a stable ecosystem through biological carrier and artifical intensive effect.

The utility model provides a multi-stage sewage purification tank, which is provided with a biological contact aeration tank, a bottom-layer waterweed purification tank, a plant wetland filter tank and an effluent sedimentation tank in sequence from a water inlet end to a water outlet end;

the bottom of the biological contact aeration tank is horizontal, the tank wall is arranged in an outward inclined way, and a biological film is laid on the lower side of the slope protection of the tank wall along the tank wall; at least four in-situ purifiers are arranged at the bottom of the biological contact aeration tank at intervals along the clockwise ring;

the bottom layer waterweed purification pond is planted with algae plants;

submerged plants are planted in the plant wetland filter tank.

Preferably, the gradient of the wall of the biological contact aeration tank is 1:3.

Preferably, the biological membrane is made of polyurethane foam, and the average pore diameter of the polyurethane foam is 15PP I.

Preferably, the in-situ purifier is a BHT-B1500 type in-situ purifier.

The utility model provides a multistage sewage purification pond, purifying effect is good, can effectual decomposition organic matter in the sewage, makes the ammonia nitrogen content of aquatic show the reduction, simultaneously can the effectual transparency that promotes the water.

Drawings

FIG. 1 is a schematic view of a multi-stage sewage purification tank biological contact aeration tank provided by the present invention;

fig. 2 is a schematic view of an effect example of a multi-stage sewage purification tank.

Wherein: 1. a tank wall; 2. a biofilm; 3. an in-situ purifier; 4. a three-dimensional biological carrier framework.

Detailed Description

Referring to fig. 1-2, the present invention provides a multi-stage sewage purification tank.

The multi-stage sewage purification tank is sequentially provided with a biological contact aeration tank, a bottom-layer waterweed purification tank, a plant wetland filter tank and an effluent sedimentation tank from a water inlet end to a water outlet end.

Referring to fig. 1, the bottom of the biological contact aeration tank is horizontal, and the tank wall 1 is inclined outward. The slope of the wall 1 is preferably 1:3 for subsequent operations.

At least four in-situ purifiers 3 are arranged at the bottom of the biological contact aeration tank at intervals along a clockwise ring, and are used for promoting the sewage in the biological contact aeration tank to circularly flow in the tank and improving the contact aeration effect.

The in-situ purifier 3 is an in-situ purifier conventionally used in the field, and as a specific implementation mode, the in-situ purifier is a BHT-B1500 type in-situ purifier manufactured by Beijing Bihaitong environmental protection equipment Co.

The upper part of the tank wall of the biological contact aeration tank is a revetment paved by cement hexagonal diamond blocks, and the lower part of the tank wall is paved with a biological film 2 along the tank wall 1.

The biofilm was made of polyurethane foam and the average pore size of the polyurethane foam was 15PP I.

Before the multi-stage sewage purification tank is used, indigenous microorganisms need to be cultured and domesticated on a biological membrane, so that the number of dominant bacteria is rapidly increased. The polyurethane foam plastic has large specific surface area, the pores on the polyurethane foam plastic are favorable for the proliferation of microorganisms, and the microorganisms contact with water to transfer, convert and degrade organic pollutants in the water, thereby realizing the purification of water quality.

Furthermore, in order to further improve the aeration effect, a three-dimensional biological carrier frame 4 is arranged in the area enclosed by the in-situ purifier 3 at the bottom of the biological contact aeration tank. The three-dimensional biological carrier frame 4 is fixed with a biological membrane for further increasing the contact area of the biological membrane and the pool water.

Furthermore, in order to prevent the loss of microorganisms in the operation process, bacillus is added into the biological contact aeration tank in the multi-stage sewage purification tank for supplement.

The pool body of the bottom layer waterweed purification pool is a conventional pool body, wherein algae with a good absorption effect on phosphorus is planted, and a certain landscape effect is provided. The algae planted in the bottom layer aquatic weed purification tank include but are not limited to: elodea nuttallii, hydrilla verticillata. One skilled in the art can select the proper algae species based on the actual water source contamination.

The body of the plant wetland filtering tank is a conventional body, wherein submerged plants and/or aquatic plants are planted in the conventional body, and a certain landscape effect is provided. The plants planted in the plant wetland filter tank include but are not limited to: bitter herbs, loosestrife, yellow flag, canna, and allium fistulosum. One skilled in the art can select the appropriate plant species based on the actual water source contamination.

Furthermore, an artificial floating island can be arranged in the plant wetland filtering tank, so that the growth of plants is facilitated, and the landscape effect is improved.

The effluent sedimentation tank is a conventional effluent sedimentation tank in the field, and the specific structure of the effluent sedimentation tank is the same as that in the prior art, so that detailed description is omitted.

The mode that can adopt the overflow between each adjacent pond carries out the transport between the pond, also can adopt the mode of pump sending, the utility model discloses do not do specific restriction to this.

The specific purifying effect of the multi-stage sewage purifying tank provided by the present invention will be described with reference to specific effect examples.

Wherein the length of the biological contact aeration tank is 60m, the width is 50m, and the depth is 2 m; the length of the bottom float grass purification tank is 50m, the width is 25m, and the depth is 2 m; the length of the plant wetland filtering tank is 50m, the width of the plant wetland filtering tank is 25m, and the depth of the plant wetland filtering tank is 2 m; the effluent sedimentation tank is 50m long, 10m wide and 2m deep. The above-mentioned tanks are combined into a multi-stage sewage purification tank (as shown in fig. 2) with length of 100m, width of 60m and depth of 2m, so as to save floor area and raise land utilization effect. And conveying among the pools is carried out among the pools in an overflow mode among all levels of pools.

The multi-stage sewage purification tank is shown in table 1.

Index (I)	Dissolved oxygen (mg/L)	Oxidation-reduction potential (mV)	Ammonia nitrogen (mg/L)	Transparency (cm)
					Before treatment	0.2	-318	21.5	20
After treatment	7.58	89.0	0.289	150
					Mild black odor	0.2～2.0	-200～50	8.0～15	25～10
Severe black odor	<0.2	<-200	>15	<10

TABLE 1 Multi-stage sewage purification tank purifying effect table

Can see from table 1, the utility model provides a multistage sewage purification pond, purifying effect is good, can effectual decomposition organic matter in the sewage, makes the ammonia nitrogen content of aquatic show the reduction, simultaneously can the effectual transparency that promotes the water.

Claims

1. A multi-stage sewage purification tank is characterized in that a biological contact aeration tank, a bottom-layer waterweed purification tank, a plant wetland filter tank and an effluent sedimentation tank are sequentially arranged in the multi-stage sewage purification tank from a water inlet end to a water outlet end;

the bottom of the biological contact aeration tank is horizontal, the tank wall (1) is arranged obliquely outwards, and a biological membrane (2) is laid along the tank wall at the lower side of the revetment of the tank wall; at least four in-situ purifiers (3) are arranged at the bottom of the biological contact aeration tank at intervals along the clockwise ring;

the bottom layer waterweed purification pond is planted with algae plants;

submerged plants are planted in the plant wetland filter tank.

2. The multi-stage sewage purification tank of claim 1, wherein the slope of the wall of the biological contact aeration tank is 1:3.

3. The multi-stage sewage purification tank of claim 1, wherein the biofilm is made of polyurethane foam, and the polyurethane foam has an average pore size of 15 PPI.

4. The multi-stage sewage purification tank of claim 1, wherein the in-situ purifier is a BHT-B1500 type in-situ purifier.