CN211999023U

CN211999023U - Two-stage sewage purification tank

Info

Publication number: CN211999023U
Application number: CN202020606842.2U
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 two-stage sewage purification tank is provided with a biological contact aeration tank and a plant purification 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 plant purification tank is planted with waterweeds and algae plants. The utility model provides a doublestage 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

Two-stage sewage purification tank

Technical Field

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

Background

The 'rural pond domestic sewage treatment technology' is based on the traditional biological contact oxidation pond method, and adopts artificial strengthening action to install in-situ direct purification machine and biological carrier in the pond, plant aquatic plant, throw in strain aquatic animal, etc. and plant shoreside emergent aquatic plant and underwater aquatic weed, so as to form a stable ecological system. 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 sewage treatment pond of doublestage through biological carrier and artifical intensive effect, forms a stable ecosystem.

The utility model provides a two-stage sewage purification tank, which is provided with a biological contact aeration tank and a plant purification tank from a water inlet end to a water outlet end in sequence;

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 plant purification tank is planted with waterweeds and algae plants.

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.

Preferably, a plurality of aquatic weed type microorganism carriers are fixed on the wall of the biological contact aeration tank.

The utility model provides a doublestage 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 biological contact aeration tank of a two-stage sewage purification tank provided by the present invention;

fig. 2 is a schematic view of an effect example of a two-stage sewage purification tank provided by the utility model.

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 two-stage sewage purification tank.

The double-stage sewage purification tank is sequentially provided with a biological contact aeration tank and a plant purification 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 1 of the biological contact aeration tank is a revetment paved by cement hexagonal diamond, and the lower part 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 double-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 purification effect of microorganisms in the biological contact aeration tank, a plurality of aquatic weed type microorganism carriers are fixed on the tank wall of the biological contact aeration tank, the aquatic weed type microorganism carriers are made of materials with the same specification as the biomembranes and are made into shapes similar to aquatic weeds, the lower ends of the aquatic weed type microorganism carriers are fixed on the tank wall and are vertically arranged, and the carriers can float with water in a mode similar to the aquatic weeds. The aquatic microorganism carrier is used by culturing, domesticating and proliferating microorganisms on the aquatic microorganism carrier.

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.

In order to prevent the microorganism loss in the operation process, when the double-stage sewage purification tank is used, bacillus is periodically put into the biological contact aeration tank for supplement.

The tank body of the plant purification tank is a conventional tank body in the field. Wherein, the algae which has better absorption function to phosphor is planted in the pool, and the planted algae includes but 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. Meanwhile, submerged plants and/or aquatic plants are planted at the edge of the tank body, and the planted plants 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.

The plant purification tank planted with algae and submerged plants and/or aquatic plants can absorb pollutants in water to a certain extent by the absorption of the root system of the plants, especially pollutants containing phosphorus, and can provide a certain landscape effect.

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 two-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 70m, the width is 60m, and the depth is 2 m; the plant purification tank is 60m long, 30m wide and 2m deep. The above-mentioned tanks are combined into a double-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 two-stage effluent treatment tank is shown in table 1.

Index (I)	Dissolved oxygen (mg/L)	Oxidation-reduction potential (mV)	Ammonia nitrogen (mg/L)	Transparency (cm)
					Before treatment	0.28	-265	19.5	20
After treatment	8.50	93.0	0.26	120
					Mild black odor	0.2～2.0	-200～50	8.0～15	25～10
Severe blackStink smell	<0.2	<-200	>15	<10

TABLE 1 two-stage sewage purifying tank purifying effect table

Can see from table 1, the utility model provides a doublestage 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 two-stage sewage purification tank is characterized in that a biological contact aeration tank and a plant purification tank are sequentially arranged from a water inlet end to a water outlet end of the two-stage sewage purification tank;

the plant purification tank is planted with waterweeds and algae plants.

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

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

5. The dual-stage sewage purification tank of claim 1, wherein a plurality of aquatic microorganism carriers are fixed on the wall of the biological contact aeration tank.