CN113024015A

CN113024015A - Sewage treatment equipment

Info

Publication number: CN113024015A
Application number: CN202110142030.6A
Authority: CN
Inventors: 林森
Original assignee: Anhui Deqi Environmental Protection Technology Co ltd
Current assignee: Anhui Deqi Environmental Protection Technology Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-06-25

Abstract

The invention discloses sewage treatment equipment which comprises a sewage collecting tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a purification tank, wherein the sewage collecting tank, the anaerobic tank, the aerobic tank, the sedimentation tank and the purification tank are connected through a pipeline and a pump, a filtering basket for filtering impurities is arranged in the sewage collecting tank, the filtering basket is arranged on the left side of the upper end of the sewage collecting tank, the left end of the filtering basket is hinged with the left end edge of the upper end of the sewage collecting tank through a rotating shaft, the front end edge and the rear end edge of the filtering basket are hinged with a rotating assembly, the filtering basket can rotate upwards around the rotating shaft through the rotating assembly, a cover body capable of covering the filtering basket is arranged at the upper end of the sewage collecting tank, a sewage inlet is formed in the cover body, and a sludge outlet is formed in the lower end of the sewage collecting tank. The sewage purification treatment can be completed through the equipment.

Description

Sewage treatment equipment

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to sewage treatment equipment.

Background

With the development of economy and the acceleration of socialization process, the living environment of human beings is seriously influenced by a large amount of sewage discharge, if the sewage is not treated well, the surrounding water body and soil are seriously polluted, and the life of human beings is influenced, so the sewage needs to be treated and then discharged.

Sewage treatment is a process in which the water quality required for discharging the wastewater obtained after sewage treatment to a certain water body or reuse is purified. Sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and is increasingly used in daily life of common people. The sewage treatment equipment that adopts at present mainly includes devices such as sewage collecting pit, equalizing basin, anaerobism pond, good oxygen pond, sedimentation tank, handles through sewage treatment equipment and can make sewage obtain purifying to a certain extent, but it has following problem: when adopting this equipment to handle sewage, the great impurity of volume can be held back on the filter screen that sets up in sewage collecting tank like leaf, little stone, rubbish etc. in sewage, after the operation longer time, can pile up a large amount of impurity on the filter screen, and the magazine clearance on with the filter screen mainly through artifical mode comes out at present, wastes time and energy and inefficiency.

Disclosure of Invention

In view of the above, the present invention provides a sewage treatment apparatus, which can effectively solve the above problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a sewage treatment device, its includes sewage collecting pit, anaerobism pond, good oxygen pond, sedimentation tank, purifying tank, it connects its characterized in that through pipeline and pump in proper order between sewage collecting pit, anaerobism pond, good oxygen pond, sedimentation tank and purifying tank in proper order: be equipped with the filtration basket that is used for filtering impurity in the sewage collecting pit, it locates sewage collecting pit upper end left side to filter the basket, just the left end of filtering the basket is articulated through the pivot with sewage collecting pit upper end left end limit, it is articulated with rotating assembly to filter both ends limit around the basket, just it can revolute the rotation in the axis through rotating assembly to filter the basket, sewage collecting pit upper end is equipped with the lid that can cover with filtering the basket, just the sewage import has been seted up on the lid, sewage collecting pit lower extreme is equipped with the sludge outlet.

Further, the rotating assembly comprises a support plate, a hinged seat, an air cylinder and a shaft, the sewage collecting tank is arranged on the support plate, the lower end of the air cylinder is arranged on the support plate through the hinged seat, and the driving end of the air cylinder is hinged with the filtering basket through the shaft.

Further, be equipped with stirring subassembly and purification post in the anaerobism pond, the stirring subassembly includes motor, (mixing) shaft and rolling disc, anaerobism bottom of the pool portion is located to the motor, the (mixing) shaft is located in the anaerobism pond, just (mixing) shaft lower extreme downwardly extending is connected with the motor outside the anaerobism pond, the bottom and the (mixing) shaft upper end fixed connection of rolling disc, the purification post is located on the rolling disc.

Furthermore, the stirring assembly further comprises a plurality of fixing rods, the lower ends of the fixing rods are fixed on the rotating disc, and the purifying columns are sleeved and fixed on the fixing rods.

Further, the purifying column comprises a barrel body, a purifying material layer, an inner carrier layer, an adsorption layer, a grid fixing layer and an outer carrier layer, wherein the barrel body is sleeved outside the fixing rod, and the purifying material layer, the inner carrier layer, the adsorption layer, the grid fixing layer and the outer carrier layer are sequentially arranged on the barrel body from inside to outside.

Furthermore, the purification material layer comprises bentonite, activated carbon, alum and quicklime, and the bentonite, the activated carbon, the alum and the quicklime are wrapped by non-woven fabrics and fixed on the cylinder body.

Further, the stirring assembly further comprises a fixing nut, a thread matched with the fixing nut is arranged at the upper end of the fixing rod, and the fixing nut is sleeved on the fixing rod in a threaded mode and fixes the purifying column on the fixing rod.

Furthermore, the filtering basket is of a cuboid structure with an opening at the upper end, and holes are formed in the filtering basket.

Further comprises an aeration tank, a pipeline assembly and an air compressor, wherein the pipeline assembly comprises a connecting pipe, an aeration pipeline and a drainage pipeline, the water inlet of the aeration tank is connected with the water outlet of the anaerobic tank through a pipeline and a pump, the water outlet of the aeration tank is connected with the water inlet of the aerobic tank through a pipeline and a pump, a plurality of aeration pipelines which are arranged in parallel are arranged in the horizontal direction below the aeration tank, a plurality of groups of aeration pipelines and drainage pipelines are sequentially arranged in the vertical direction below the aeration tank from top to bottom, the aeration pipeline is communicated with the bottom of the aeration tank, the space between the aeration pipeline and the space between the aeration pipeline and the drainage pipeline through connecting pipes, one end of the aeration pipeline is closed, the other end of the aeration pipeline is connected with an air compressor, one end of the drainage pipeline is connected with an air compressor, and the other end of the drainage pipeline is connected with the aerobic tank through a pump and a pipeline.

Furthermore, the aerobic tank is internally provided with a stirring component and a purification column which are the same as those in the anaerobic tank

Compared with the prior art, the invention has the beneficial effects that:

(1) sewage enters into the sewage collection pool through the sewage inlet, and the sewage inlet below is equipped with and filters the basket, and the great impurity of volume can be held back on the filtration basket that sets up in the sewage collection pool like leaf, little stone, rubbish etc. in the sewage, works a period of time after the sewage collection pool, and accessible rotating assembly will filter the basket and overturn upper left to impurity in the basket discharges will filtering, then rotates to the sewage collection pool in through rotating assembly, in order to carry out sewage filtering work.

(2) The lower extreme and the mounting panel of cylinder are articulated, and the upper end and the filter basket of cylinder are articulated, and after the cylinder started, cylinder drive end drive and its articulated filter basket upset upper left to impurity in will filtering the basket is emptyd.

(3) Through set up stirring subassembly and purifying column in the anaerobism pond and can increase the contact of sewage and purifying column to improve purifying effect. Generally directly fix the purification carrier in present anaerobism pond in the pond, anaerobism and facultative anaerobe adsorb on purifying the carrier, thereby decompose the organic pollutant in the sewage, but the sewage in present anaerobism pond is in quiescent condition, only be close to the organic pollutant in the sewage that purifies carrier department and obtain effective decomposition, and keep away from in the sewage that purifies the carrier organic pollutant can not obtain effective decomposition, the event sets up the stirring subassembly in this technical scheme, it rotates to fix the purification post on the stirring subassembly through the drive, increase the contact of water and purification post, thereby make the organic pollutant in the sewage obtain effective decomposition.

(4) The inner carrier layer and the outer carrier layer adopt geotextile; the adsorption layer is of a three-layer structure and is sequentially provided with a sponge layer, a foaming plastic layer and a sponge layer from top to bottom, and each two layers are connected through thermal compounding; the grid fixing layer adopts geogrid which is mainly used for fixing the inner carrier layer and the adsorption layer. The inner carrier layer, the adsorption layer and the outer carrier layer provide attachment carriers for bacteria, fungi and primitive organisms in the sewage, so that the bacteria, fungi and primitive organisms grow and breed on the carriers. In addition, the oxygen in the inner carrier layer and the adsorption layer is very little, so that the growth and breeding of anaerobic bacteria are facilitated, the oxygen in the outer carrier layer is slightly higher than that in the inner carrier layer and the adsorption layer, so that the dependent growth and breeding of facultative bacteria are facilitated, the inner carrier layer, the adsorption layer and the outer carrier layer form a living environment with anaerobism and facultative bacteria, and the capacity of degrading organic pollutants is improved. In addition, the bentonite, the active carbon, the alum and the quicklime arranged on the purifying material layer can purify water quality and adsorb organic pollutants, heavy metals and the like in sewage.

(5) Set up the aeration tank between anaerobism pond and good oxygen pond, after the sewage in the anaerobism pond got into the aeration tank, sewage loops through the connecting pipe, the aeration pipe, drainage pipe discharges, and the one end of aeration pipe and drainage pipe is connected with air compressor simultaneously, and when sewage got into aeration pipe and drainage pipe from the connecting pipe, sewage fully contacted with the oxygen in aeration pipe and the drainage pipe, discharged through the other end of drainage pipe at last, discharged to good oxygen pond through pump and pipeline at last.

Drawings

FIG. 1 is a schematic structural view of a wastewater collection tank according to the present invention;

FIG. 2 is a view showing a state of use of the wastewater collection tank shown in FIG. 1;

FIG. 3 is another schematic view of the sewage collection tank of FIG. 2;

FIG. 4 is a schematic structural diagram of an anaerobic tank;

FIG. 5 is a schematic view of the internal structure of the anaerobic tank shown in FIG. 4;

FIG. 6 is a schematic view of the configuration of the stirring assembly and the purification column;

FIG. 7 is a schematic structural view of the stirring assembly;

FIG. 8 is a schematic structural view of an aeration tank;

FIG. 9 is a schematic view of another angle structure of the aeration tank shown in FIG. 8;

FIG. 10 is a schematic view showing the internal structure of the aeration tank shown in FIG. 9;

FIG. 11 is a schematic front view of the aeration tank shown in FIG. 10;

FIG. 12 is a schematic structural view of a piping assembly;

description of reference numerals:

the sewage treatment device comprises a sewage collecting tank 1, a filtering basket 2, a rotating shaft 3, a cover body 4, a sewage inlet 5, a sewage outlet 6, a support plate 7, a hinged seat 8, a cylinder 9, a shaft 10, an anaerobic tank 11, a purifying column 12, a motor 13, a stirring shaft 14, a rotating disc 15, a fixing rod 16, a fixing nut 17, an aeration tank 18, a connecting pipe 19, an aeration pipeline 20, a drainage pipeline 21 and an air compressor 22.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

As shown in fig. 1-3, a sewage treatment device comprises a sewage collecting tank, an anaerobic tank, an aerobic tank, a sedimentation tank and a purifying tank, the sewage collecting tank, the anaerobic tank, the aerobic tank, the sedimentation tank and the purifying tank are sequentially connected with each other through a pipeline and a pump, a filtering basket 2 for filtering impurities is arranged in the sewage collecting tank 1, the filtering basket 2 is arranged on the left side of the upper end of the sewage collecting tank 1, the left end of the filtering basket 2 is hinged with the left end edge of the upper end of the sewage collecting tank 1 through a rotating shaft 3, the front end edge and the rear end edge of the filtering basket 2 are hinged with a rotating assembly, the filtering basket 1 can rotate upwards around a rotating shaft 3 through a rotating component, a cover body 4 which can cover the filtering basket 2 is arranged at the upper end of the sewage collecting tank 1, and a sewage inlet 5 is formed in the cover body 4, and a sewage outlet 6 is formed in the lower right end of the sewage collecting tank 1.

In above-mentioned technical scheme, sewage enters into the sewage collection pond through sewage inlet in, the sewage inlet below is equipped with filters the basket, and the great impurity of volume can be held back on the filtration basket that sets up in the sewage collection pond like leaf, little stone, rubbish etc. in the sewage, after sewage collection pond work a period, accessible rotating assembly will filter the basket and overturn upper left to impurity in the basket discharges will filtering, then rotates to the sewage collection pond in through rotating assembly, in order to carry out sewage filtering work.

As a preferred option of the above technical solution, as shown in fig. 1 to 3, the rotating assembly includes a support plate 7, a hinged seat 8, a cylinder 9 and a shaft 10, the sewage collecting tank 1 is disposed on the support plate 7, the lower end of the cylinder 9 is disposed on the support plate 7 through the hinged seat 8, and the driving end of the cylinder 9 is hinged to the filter basket 2 through the shaft 10. The lower extreme and the mounting panel of cylinder are articulated, and the upper end and the filter basket of cylinder are articulated, and after the cylinder started, cylinder drive end drive and its articulated filter basket upset upper left to impurity in will filtering the basket is emptyd.

As a preferred option of the above technical solution, as shown in fig. 4-7, a stirring assembly and a purifying column 12 are disposed in the anaerobic tank 11, the stirring assembly includes a motor 13, a stirring shaft 14 and a rotating disc 15, the motor 13 is disposed at the bottom of the anaerobic tank 11, the stirring shaft 14 is disposed in the anaerobic tank 11, the lower end of the stirring shaft 14 extends downward to the outside of the anaerobic tank 11 and is connected with the motor 13, the bottom of the rotating disc 15 is fixedly connected with the upper end of the stirring shaft 14, and the purifying column 12 is disposed on the rotating disc 15.

In above-mentioned technical scheme, can increase the contact of sewage and purifying column through set up stirring subassembly and purifying column in the anaerobism pond to improve purifying effect. Generally directly fix the purification carrier in present anaerobism pond in the pond, anaerobism and facultative anaerobe adsorb on purifying the carrier, thereby decompose the organic pollutant in the sewage, but the sewage in present anaerobism pond is in quiescent condition, only be close to the organic pollutant in the sewage that purifies carrier department and obtain effective decomposition, and keep away from in the sewage that purifies the carrier organic pollutant can not obtain effective decomposition, the event sets up the stirring subassembly in this technical scheme, it rotates to fix the purification post on the stirring subassembly through the drive, increase the contact of water and purification post, thereby make the organic pollutant in the sewage obtain effective decomposition.

As shown in fig. 4-7, the stirring assembly further includes a plurality of fixing rods 16, the lower ends of the fixing rods 16 are fixed on the rotating disc 15, and the purifying column 12 is sleeved and fixed on the fixing rods 16. The purification column can be detachably fixed on the fixing rod, and the purification column can be conveniently replaced and maintained. In addition, the fixed rods are uniformly distributed along the circumferential direction of the rotating disc, so that the water body is fully contacted with the purifying column, and the decomposition efficiency of organic pollutants is improved.

Preferably, the purifying column 12 comprises a cylinder, a purifying material layer, an inner carrier layer, an adsorption layer, a grid fixing layer and an outer carrier layer, the cylinder is sleeved outside the fixing rod 16, and the purifying material layer, the inner carrier layer, the adsorption layer, the grid fixing layer and the outer carrier layer are sequentially arranged on the cylinder from inside to outside. The purifying material layer comprises bentonite, activated carbon, alum and quicklime, and the bentonite, the activated carbon, the alum and the quicklime are wrapped by non-woven fabrics and fixed on the cylinder body.

The inner carrier layer and the outer carrier layer adopt geotextile; the adsorption layer is of a three-layer structure and is sequentially provided with a sponge layer, a foaming plastic layer and a sponge layer from top to bottom, and each two layers are connected through thermal compounding; the grid fixing layer adopts geogrid which is mainly used for fixing the inner carrier layer and the adsorption layer. The inner carrier layer, the adsorption layer and the outer carrier layer provide attachment carriers for bacteria, fungi and primitive organisms in the sewage, so that the bacteria, fungi and primitive organisms grow and breed on the carriers. In addition, the oxygen in the inner carrier layer and the adsorption layer is very little, so that the growth and breeding of anaerobic bacteria are facilitated, the oxygen in the outer carrier layer is slightly higher than that in the inner carrier layer and the adsorption layer, so that the dependent growth and breeding of facultative bacteria are facilitated, the inner carrier layer, the adsorption layer and the outer carrier layer form a living environment with anaerobism and facultative bacteria, and the capacity of degrading organic pollutants is improved. In addition, the bentonite, the active carbon, the alum and the quicklime arranged on the purifying material layer can purify water quality and adsorb organic pollutants, heavy metals and the like in sewage.

Preferably, the stirring assembly further comprises a fixing nut 17, the upper end of the fixing rod 16 is provided with a thread matched with the fixing nut 17, and the fixing nut 17 is sleeved on the fixing rod 16 in a threaded manner and fixes the purifying column 12 on the fixing rod 16. The fixed nut is arranged to facilitate the fixing and the dismounting of the purifying column.

Preferably, as shown in fig. 1 to 3, the filter basket 2 has a rectangular parallelepiped structure with an open upper end, and the filter basket 2 is provided with holes.

As a preferred technical solution, as shown in fig. 8-12, the system further comprises an aeration tank 18, a pipe assembly and an air compressor 22, wherein the pipe assembly comprises a connecting pipe 19, an aeration pipe 20 and a water discharge pipe 21, a water inlet of the aeration tank 18 is connected with a water outlet of the anaerobic tank 11 through a pipe and a pump, a water outlet of the aeration tank is connected with a water inlet of the aerobic tank through a pipe and a pump, a plurality of aeration pipes 20 arranged in parallel are arranged below the aeration tank 18 in a horizontal direction, a plurality of groups of aeration pipes 20 and water discharge pipes 21 are sequentially arranged below the aeration tank 18 in a vertical direction from top to bottom, the aeration pipes 20 and the aeration pipes 20 are communicated with each other through the connecting pipe 19 at the bottom of the aeration tank 18, between the aeration pipes 20 and between the water discharge pipes 21 in a vertical direction, one end of each aeration pipe 20 is closed, and the other end of, one end of the drainage pipeline 21 is connected with an air compressor 22, and the other end of the drainage pipeline 21 is connected with the aerobic tank through a pump and a pipeline.

At present in common sewage treatment pond, the anaerobism pond is direct to be connected with good oxygen pond, oxygen is carried in good oxygen pond to good oxygen pond through oxygen jar or air compressor outside the good oxygen pond, but the oxygen of output mainly concentrates on pipeline exhaust hole department, hardly make abundant dissolved oxygen in the sewage, the event is based on this problem, set up the aeration tank between anaerobism pond and good oxygen pond, after sewage in the anaerobism pond gets into the aeration tank, sewage loops through the connecting pipe, the aeration pipe, drainage pipe discharges, simultaneously the one end and the air compressor of aeration pipe and drainage pipe are connected, when sewage gets into aeration pipe and drainage pipe from the connecting pipe, sewage fully contacts with the oxygen in aeration pipe and the drainage pipe, discharge through the other end of drainage pipe at last, discharge to good oxygen pond through pump and pipeline at last.

Preferably, the aerobic tank is internally provided with a stirring assembly and a purification column which are the same as those in the anaerobic tank 11.

In above-mentioned technical scheme, the stirring subassembly that sets up in the aerobic tank can increase purifying column and sewage contact, improves purification efficiency, in addition, purifying column 12 includes barrel, purifying material layer, interior carrier layer, adsorbed layer, net fixed bed and outer carrier layer, the barrel cup joints outside dead lever 16, be equipped with purifying material layer, interior carrier layer, adsorbed layer, net fixed bed and outer carrier layer from inside to outside in proper order on the barrel. The purifying material layer comprises bentonite, activated carbon, alum and quicklime, and the bentonite, the activated carbon, the alum and the quicklime are wrapped by non-woven fabrics and fixed on the cylinder body. The inner carrier layer and the outer carrier layer adopt geotextile; the adsorption layer is of a three-layer structure and is sequentially provided with a sponge layer, a foaming plastic layer and a sponge layer from top to bottom, and each two layers are connected through thermal compounding; the grid fixing layer adopts geogrid which is mainly used for fixing the inner carrier layer and the adsorption layer. The inner carrier layer, the adsorption layer and the outer carrier layer provide attachment carriers for bacteria, fungi and primitive organisms in the sewage, so that the bacteria, fungi and primitive organisms grow and breed on the carriers. In addition, the oxygen in the inner carrier layer, the adsorption layer and the outer carrier layer is more, which is beneficial to the growth and breeding of aerobic bacteria and increases the capability of degrading organic pollutants. In addition, the bentonite, the active carbon, the alum and the quicklime arranged on the purifying material layer can purify water quality and adsorb organic pollutants, heavy metals and the like in sewage. In addition, in order to ensure that the oxygen in the aerobic tank is sufficient, the oxygen can be directly discharged into the aerobic tank through an oxygen tank or an air compressor through a pipeline, so that the purification effect of the aerobic tank is improved.

The sewage treatment principle is as follows: sewage treatment equipment includes sewage collecting tank, anaerobism pond, good oxygen pond, sedimentation tank and purifying tank, sewage collecting tank, anaerobism pond, good oxygen pond, pass through pipeline and pump connection between sedimentation tank and purifying tank, sewage collecting tank is used for collecting sewage, can add the PH of acid-base in order to adjust sewage in sewage collecting tank simultaneously, decolorizing agent (the mixture of polyaluminium chloride and polyacrylamide) carries out the decoloration, the decomposition of organic pollutant in anaerobism pond and the good oxygen pond mainly used sewage, the bentonite that the while purifying material layer set up, activated carbon, alum and quick lime can purify water quality, adsorb organic pollutant in the sewage, heavy metal etc.. Then the supernatant after precipitation is pumped into a purification tank, a nanofiltration device and a reverse osmosis device can be arranged in the purification tank for filtration, and the water purified by the nanofiltration device and the reverse osmosis device is discharged.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. The utility model provides a sewage treatment device, its includes sewage collecting pit, anaerobism pond, good oxygen pond, sedimentation tank and purifying tank, connect its characterized in that through pipeline and pump in proper order between sewage collecting pit, anaerobism pond, good oxygen pond, sedimentation tank and purifying tank: be equipped with in sewage collecting tank (1) and be used for filtering basket (2) of impurity, it locates sewage collecting tank (1) upper end left side to filter basket (2), just the left end of filtering basket (2) is articulated through pivot (3) with sewage collecting tank (1) upper end left end limit, filter both ends limit and the runner assembly are articulated around basket (2), just filter basket (1) and can revolute axle (3) through the runner assembly and upwards rotate, sewage collecting tank (1) upper end is equipped with lid (4) that can cover with filtering basket (2), just sewage import (5) have been seted up on lid (4), sewage collecting tank (1) right lower extreme is equipped with sewage outlet (6).

2. The sewage treatment apparatus according to claim 1, wherein: the rotating assembly comprises a support plate (7), a hinged seat (8), a cylinder (9) and a shaft (10), the sewage collecting tank (1) is arranged on the support plate (7), the lower end of the cylinder (9) is arranged on the support plate (7) through the hinged seat (8), and the driving end of the cylinder (9) is hinged with the filtering basket (2) through the shaft (10).

3. The sewage treatment apparatus according to claim 1, wherein: be equipped with stirring subassembly and purification post (12) in anaerobism pond (11), the stirring subassembly includes motor (13), (mixing) shaft (14) and rolling disc (15), anaerobism pond (11) bottom is located in motor (13), in anaerobism pond (11) is located in (mixing) shaft (14), just (mixing) shaft (14) lower extreme downwardly extending to anaerobism pond (11) is connected with motor (13) outward, the bottom and (mixing) shaft (14) upper end fixed connection of rolling disc (15), it locates on rolling disc (15) to purify post (12).

4. The sewage treatment apparatus according to claim 3, wherein: the stirring assembly further comprises a plurality of fixing rods (16), the lower ends of the fixing rods (16) are fixed on the rotating disc (15), and the purifying column (12) is sleeved and fixed on the fixing rods (16).

5. The sewage treatment apparatus according to claim 4, wherein: purifying column (12) include barrel, purifying material layer, interior carrier layer, adsorbed layer, net fixed bed and outer carrier layer, the barrel cup joints outside dead lever (16), be equipped with purifying material layer, interior carrier layer, adsorbed layer, net fixed bed and outer carrier layer from inside to outside in proper order on the barrel.

6. The sewage treatment apparatus according to claim 5, wherein: the purification material layer comprises bentonite, activated carbon, alum and quicklime, and the bentonite, the activated carbon, the alum and the quicklime are wrapped by non-woven fabrics and fixed on the cylinder body.

7. The sewage treatment apparatus according to claim 4, wherein: the stirring assembly further comprises a fixing nut (17), threads matched with the fixing nut (17) are arranged on the upper end of the fixing rod (16), and the fixing nut (17) is sleeved on the fixing rod (16) in a threaded mode and fixes the purifying column (12) on the fixing rod (16).

8. The sewage treatment apparatus according to claim 1, wherein: the filtering basket (2) is of a cuboid structure with an opening at the upper end, and holes are formed in the filtering basket (2).

9. The sewage treatment apparatus according to claim 3, wherein: the device is characterized by further comprising an aeration tank (18), a pipeline assembly and an air compressor (22), wherein the pipeline assembly comprises a connecting pipe (19), an aeration pipeline (20) and a drainage pipeline (21), a water inlet of the aeration tank (18) is connected with a water outlet of the anaerobic tank (11) through a pipeline and a pump, the water outlet of the aeration tank (18) is connected with a water inlet of the aerobic tank through a pipeline and a pump, a plurality of aeration pipelines (20) which are arranged in parallel are arranged in the horizontal direction below the aeration tank (18), a plurality of groups of aeration pipelines (20) and drainage pipelines (21) are sequentially arranged in the vertical direction below the aeration tank (18) from top to bottom, the aeration pipelines (20) and the vertical direction between the aeration pipelines (20) and the drainage pipelines (21) are communicated through the connecting pipe (19), one end of each aeration pipeline (20) is closed, the other end of the aeration pipeline (20) is connected with an air compressor (22), one end of the drainage pipeline (21) is connected with the air compressor (22), and the other end of the drainage pipeline (21) is connected with the aerobic tank through a pump and a pipeline.

10. The sewage treatment apparatus according to claim 3 or 9, wherein: the aerobic tank is internally provided with a stirring component and a purifying column (12) which are the same as those in the anaerobic tank (11).