CN209113572U - A kind of sewage disposal system - Google Patents

Abstract

The utility model discloses a kind of sewage disposal systems, including anaerobic pond, aerobic tank, flocculation basin, filtering ponds and the sterilization pool being sequentially communicated by channel, the water inlet of anaerobic pond is equipped with slag-water separator, anaerobic organism turntable is installed in anaerobic pond, aerobe turntable is installed in aerobic tank, the attachment bedding of anaerobic organism turntable and aerobic biological rotating disk includes multiple annular arrays and the multiple fan-shaped discs being sequentially connected, fan-shaped disc uses triangular grid structures, and the infall of adjacent triangular apertures is equipped with protrusion on triangular grid structures；When use, sewage is handled followed by slag-water separator, anaerobic pond, aerobic tank, flocculation basin, filtering ponds and sterilization pool, treatment process is rationally effective, and triangular grid structures are used as the attachment bedding of the anaerobic organism turntable of processing core and aerobic biological rotating disk, specific surface area is bigger, sewage treating efficiency and effect with higher can enable the sewage of discharge up to standard.

Description

A kind of sewage disposal system

Technical field

The utility model relates to technical field of sewage, more particularly to a kind of sewage disposal system.

Background technique

Large amount of sewage would generally be generated during industrial production etc., is directly arranged if do not handled this kind of sewage It puts, not only environment can be caused seriously to pollute, but also will affect human health.

Biological rotating disk is a kind of biofilm sewage disposal technology, by being mounted in shaft for disc interval, and is impregnated It is rotated into the sewage for the treatment of trough, contacts sewage with the various strains being attached on disc and processed.

But the specific surface area of Current Domestic biological rotating disk is small, carrier surface forming biofilm property is poor, be easy to cause large area demoulding, so that dirty Sewage in water treatment trough contacts small with the strain being attached on disc, and sewage treating efficiency is low, actually increases and is processed into This；And individually using biological rotating disk as sewage-treatment plant and can not be up to standard by sewage treatment, therefore how to improve biology and turn The sewage treating efficiency and effect of disk are simultaneously up to standard by sewage treatment, are that the technology that those skilled in the art need to solve at present is asked Topic.

Utility model content

The purpose of the utility model is to provide a kind of sewage disposal systems, compact-sized using biological rotating disk as core, cloth Office is reasonable, sewage treating efficiency and effect with higher.

In order to solve the above technical problems, the utility model provides a kind of sewage disposal system, including successively connected by channel Logical anaerobic pond, aerobic tank, flocculation basin, filtering ponds and sterilization pool, the water inlet of the anaerobic pond are equipped with for going to decontaminate The slag-water separator of large granular impurity in water is equipped with the anaerobic organism for decomposing dirty Organic substance in water in the anaerobic pond and turns Disk, the aerobe turntable for absorbing dirty Organic substance in water is equipped in the aerobic tank, and the flocculation basin is equipped with and is used for The addition flocculation medicament into pond is so that dirt flocculation is at the chemicals dosing plant of floc sedimentation in sewage, and the sterilization pool is equipped with for dirt Water carries out disinfection the ultraviolet disinfection equipment of processing；The anaerobic organism turntable and the aerobe turntable include shaft, use Multiple attachment beddings in the shaft are installed in the motor and interval for driving the shaft, the attachment bedding includes more A annular array and the fan-shaped disc being sequentially connected, the sector disc is including fan-shaped frame and by the fan-shaped frame packet The triangular grid structures covered are covered with tri-angle-holed, the adjacent tri-angle-holed infall on the triangular grid structures Equipped with protrusion.

Preferably, the anaerobic pond is laterally arranged in series with the aerobic tank, and it is remote that the water inlet of the anaerobic pond is located at it Side from the aerobic tank, the anaerobic pond are connected to the aerobic tank by the through-hole in pond body；It is the flocculation basin, described Filtering ponds and the ultraviolet disinfection equipment are arranged laterally side by side and are set to the front side of the aerobic tank；In the front side of the anaerobic pond Power distribution cabinet is equipped with for equipment room, in the equipment room and for controlling the motor, the chemicals dosing plant and described ultraviolet disappearing The controller of malicious equipment.

Preferably, the aerobe turntable be equipped with close to one end of the aerobic tank water outlet for by part of contaminated water and Biological bacteria drops back into the part flow arrangement flowing in the anaerobic pond.

It preferably, further include flow regulator for adjusting the discharge of sewage, the water outlet of the flow regulator and institute State the water inlet connection of slag-water separator.

Preferably, further include storage basin, the slag notch of the slag-water separator and the filtering ponds with the storage basin Connection.

Preferably, the triangular grid structures of the attachment beddings of front and back adjacent two are staggered, and before making The protrusion of attachment bedding described in side is located at the described tri-angle-holed interior of the rear side attachment bedding.

Preferably, the triangular grid structures include multiple first connecting rods for being arranged in parallel and arranging at equal intervals, it is multiple The second connecting rod and multiple third connecting rods for being arranged in parallel and arranging at equal intervals for being arranged in parallel and arranging at equal intervals, described One connecting rod, the second connecting rod and third connecting rod intersection are connected to form described tri-angle-holed；It is described tri-angle-holed to be equilateral It is tri-angle-holed, and described tri-angle-holed be uniformly distributed in the fan-shaped frame.

Preferably, the front and back of each tri-angle-holed infall is equipped with the protrusion, is located at positive described Raised and positioned at the back side the protrusion corresponds, and corresponding two protrusion coaxial arrangements.

Preferably, in the fan-shaped frame equipped with the circumferential support bar parallel with its arc-shaped frame and with radially prolong The both ends of the radial support item stretched, the circumferential direction support bar and the radial support item are fixedly linked with the fan-shaped frame, The circumferential direction support bar and the radial support item intersect, and the triangular grid structures are divided into multiple parts and are tied Structure.

Preferably, the side of each fan-shaped disc is equipped with boss, and other side position corresponding with the boss is equipped with With the matched card slot of the boss, when two attachment beddings of front and back adjacent position connect, on an attachment bedding The corresponding each card slot being caught on another described attachment bedding of each boss in.

Sewage disposal system provided by the utility model, including the anaerobic pond, aerobic tank, flocculation being sequentially communicated by channel Pond, filtering ponds and sterilization pool, the water inlet of anaerobic pond are equipped with the slag-water separator for removing large granular impurity in sewage, Anaerobic organism turntable for decomposing dirty Organic substance in water is installed in anaerobic pond, is equipped in aerobic tank for absorbing in sewage The aerobe turntable of organic matter, flocculation basin is equipped with for the addition flocculation medicament into pond so that dirt flocculation is at wadding in sewage The chemicals dosing plant of group, sterilization pool are equipped with for carrying out disinfection the ultraviolet disinfection equipment of processing to sewage；

Anaerobic organism turntable and aerobic biological rotating disk include that shaft, the motor for drive shaft and interval are installed on Multiple attachment beddings in shaft, attachment bedding include multiple annular arrays and the multiple fan-shaped discs being sequentially connected, fan Shape disc includes fan-shaped frame and the triangular grid structures that are coated by fan-shaped frame, is covered with triangle on triangular grid structures The infall in hole, adjacent triangular apertures is equipped with protrusion.

Triangular grid structures are set by the attachment bedding of anaerobic organism turntable and aerobic biological rotating disk, and in triangle Protrusion is arranged in the infall in hole, and compared with the other shapes of same size such as the network of rectangle, not only intensity is higher, and three Angular hole and crosspoint quantity are more, then the raised quantity of intersection setting is also more, thus the specific surface area of fan-shaped disc Bigger, carrier surface forming biofilm property is preferable, can be improved the sewage treatment capacity of anaerobic organism turntable and aerobic biological rotating disk；In use, dirty Water is followed by slag-water separator, anaerobic pond, aerobic tank, flocculation basin, filtering ponds and sterilization pool, by slag-water separator by sewage In biggish particulate matter or suspended matter removal, dirty Organic substance in water is decomposed using anaerobic organism turntable, utilize aerobe turn Disk absorbs dirty Organic substance in water, realizes the purification of sewage, then so that dirt in sewage is flocculated into floc sedimentation, and benefit by the medicament that flocculates The solid suspensions such as floc sedimentation in sewage are retained with filtering ponds, are finally carried out disinfection processing to processed aqueous, processing work Skill is rationally effective, sewage treating efficiency and effect with higher, and the sewage of discharge can be enable up to standard.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of specific embodiment of sewage disposal system provided by the utility model；

Fig. 2 is a kind of structural block diagram of specific embodiment of sewage disposal system provided by the utility model；

Fig. 3 is a kind of structural schematic diagram of specific embodiment of fan-shaped disc provided by the utility model；

Fig. 4 is a kind of structural schematic diagram of specific embodiment of attachment bedding provided by the utility model；

Fig. 5 is the partial sectional view after multiple attachment bedding overlapping assemblings.

It is marked in attached drawing as follows:

Flow regulator 1, slag-water separator 2, anaerobic pond 3, aerobic tank 4, flocculation basin 5, filtering ponds 6, sterilization pool 7, storage mud Pond 8, equipment room 9, fan-shaped frame 10, triangular grid structures 11, protrusion 12, circumferential support bar 13, radial support item 14, boss 15, card slot 16, through-hole 17.

Specific embodiment

The core of the utility model is to provide a kind of sewage disposal system, compact-sized using biological rotating disk as core, cloth Office is reasonable, sewage treating efficiency and effect with higher.

In order to make those skilled in the art better understand the scheme of the utility model, with reference to the accompanying drawing and specific implementation The utility model is described in further detail for mode.

Fig. 1 to Fig. 5 is please referred to, Fig. 1 is a kind of specific embodiment of sewage disposal system provided by the utility model Structural schematic diagram；Fig. 2 is a kind of structural block diagram of specific embodiment of sewage disposal system provided by the utility model； Fig. 3 is a kind of structural schematic diagram of specific embodiment of fan-shaped disc provided by the utility model；Fig. 4 is the utility model A kind of structural schematic diagram of specific embodiment of provided attachment bedding；Fig. 5 is after the overlapping of multiple attachment beddings assembles Partial sectional view.

The sewage disposal system that specific embodiment of the present invention provides, including the anaerobic pond being sequentially communicated by channel 3, aerobic tank 4, flocculation basin 5, filtering ponds 6 and sterilization pool 7, the water inlet of anaerobic pond 3 are equipped with for removing in sewage big The slag-water separator 2 of grain impurity, the anaerobic organism turntable for decomposing dirty Organic substance in water, aerobic tank 4 are equipped in anaerobic pond 3 Aerobe turntable for absorbing dirty Organic substance in water is inside installed, flocculation basin 5 is equipped with for the addition flocculation medicine into pond Agent is so that at the chemicals dosing plant of floc sedimentation, sterilization pool 7 is equipped with for carrying out disinfection the purple of processing to sewage for dirt flocculation in sewage Outer sterilizing equipment decontaminating apparatus；

Anaerobic organism turntable and aerobic biological rotating disk include that shaft, the motor for drive shaft and interval are installed on Multiple attachment beddings in shaft, attachment bedding include multiple annular arrays and the multiple fan-shaped discs being sequentially connected, respectively Sector disk piece annular array is simultaneously sequentially connected the attachment bedding to form annular, and fan-shaped disc specifically includes fan-shaped 10 He of frame The triangular grid structures 11 coated by fan-shaped frame 10 are covered with tri-angle-holed, adjacent triangle on triangular grid structures 11 The infall in hole is equipped with protrusion 12.

Sewage disposal system provided by the utility model sets the attachment bedding of anaerobic organism turntable and aerobic biological rotating disk It is set to triangular grid structures 11, and the other shapes such as square in tri-angle-holed infall setting protrusion 12, with same size The network of shape is compared, and not only intensity is higher, and tri-angle-holed and crosspoint quantity is more, then the protrusion of intersection setting 12 quantity are also more, so that the specific surface area of fan-shaped disc is bigger, carrier surface forming biofilm property is preferable, can be improved anaerobic organism turntable and becomes reconciled The sewage treatment capacity of oxygen biological rotating disk；In use, sewage is followed by slag-water separator 2, anaerobic pond 3, anaerobic pond 3, flocculation Particulate matter biggish in sewage or suspended matter are removed by slag-water separator 2, utilize anaerobism by pond 5, filtering ponds 6 and sterilization pool 7 Biological rotating disk decomposes dirty Organic substance in water, absorbs dirty Organic substance in water using aerobic biological rotating disk, realizes the purification of sewage, so Make in sewage dirt flocculation at floc sedimentation by the medicament that flocculates afterwards, and using filtering ponds 6 by solid suspensions such as floc sedimentations in sewage Retention finally carries out disinfection processing to processed aqueous, and treatment process is rationally effective, sewage treating efficiency with higher with Effect can enable the sewage of discharge up to standard.

Wherein, the shaft of anaerobic organism turntable and aerobic biological rotating disk is preferably parallel with sewage flow direction, to reach preferable Clean-up effect, sewage water (flow) direction is perpendicular to fan-shaped disc at this time, to prevent protrusion 12 from stopping drainage flow, the height of protrusion 12 Direction is preferably perpendicular to plane where fan-shaped disc, so that protrusion 12 is consistent with water (flow) direction.

The shaft of aerobe turntable can be erected at the two sides of aerobic tank 4 by self-aligning bearing, and shaft can pass through chain Wheel, chain connect with the deceleration motor, and the shaft of anaerobic organism turntable can then pass through the rotation band of aerobe disk shaft It is dynamic, specifically, shaft coupling can be set therebetween, and can transmit by chain sprocket, such anaerobic organism turntable Revolving speed can realize adjusting, the rotation of two-stage biological turntable is realized by motor, had both been able to achieve the saving of energy consumption, also It can be reduced the maintenance point of equipment.

It can be equipped with shell above aerobic tank 4 to cover entire aerobe turntable, exhaust apparatus is equipped on shell, The exhaust gas generated in sewage disposal process is discharged；And pass through the water level of anaerobic pond 3 then without covering above anaerobic organism turntable Control makes to be totally submerged on anaerobic organism turntable realizes anaerobic environment under water.

Further, be the occupied area for reducing sewage disposal system, keep its layout more rationally compact, then it can be by anaerobism Pond 3 and aerobic tank 4 are laterally arranged in series, and the water inlet of anaerobic pond 3 is located at its side far from aerobic tank 4, and anaerobic pond 3 with it is good Oxygen pond 4 can be connected to by the through-hole in pond body, can be reduced pipeline connection, be guaranteed sewage treatment continuity, and water resistance is reduced, and Save space；And the follow-up phase of flocculation basin 5, filtering ponds 6 and ultraviolet disinfection equipment as sewage treatment, it is mainly used for further Purify aqueous, it is desirable that space it is relatively small, then three can be arranged laterally side by side and be set to aerobic tank 4 front side；In anaerobism The front side in pond 3 then can be set to equipment room 9, power distribution cabinet, common tool and for controlling motor, chemicals dosing plant and ultraviolet disappearing Controller of malicious equipment etc. then can be set in equipment room 9；Sky is carried out according to the function of waste water processes and each section Between be laid out and distribution, and reduce pipeline connection, keep sewage disposal system integrated higher, can be improved space utilization rate, and mention High sewage treating efficiency.

Further, it can be equipped with adjustable flow distributing device close to one end of 4 water outlet of aerobic tank in aerobe turntable, In case of need, part of contaminated water and biological bacteria can be dropped back into the anaerobic organism turntable region flowing in anaerobic pond 3 to follow Ring reaction realizes biological deoxidier biota preferably and dephosphorization denitrogenation function.

Further, the sewage disposal system that specific embodiment of the present invention provides, can be set in aerobic tank 4 There is the apparatus of oxygen supply for assisting aeration, to provide good aerobic environment for aerobe strain, guarantees aerobe turntable Sewage treatment capacity.

Specifically, the sewage disposal system that specific embodiment of the present invention provides, slag-water separator 2 can select lattice Grid filter removes the sundries in sewage using filtering grid, specifically filter opening gap can be used for the mistake of 0.5mm-1.0mm Filter grid grid, can be realized good filter effect, effectively avoid accumulation of impurities to a certain extent when blocking disk plate for biological rotating disk between Gap or pore cause disk plate for biological rotating disk or the abrasion of other mechanical structures, lead to shortening for its service life.

On the basis of above-mentioned each specific embodiment, the sewage treatment system of specific embodiment of the present invention offer Flow regulator 1, the water outlet and slag-water separator 2 of flow regulator 1 can also be arranged in the front end of slag-water separator 2 in system Water inlet connection；Before sewage enters slag-water separator 2, enter system water and water by the way that flow regulator 1 is controllable Pressure, in order to avoid whole system is in excess load or water pressure fluctuations state, to guarantee wastewater treatment efficiency, after guarantee processing Water quality consistently achieve established standards.

Further, the sewage disposal system that specific embodiment of the present invention provides, further includes storage basin 8, and slag The slag notch of separator 2 and filtering ponds 6 is connected to storage basin 8；By mistake when sewage flows through slag-water separator 2 and filtering ponds 6 The solid filter residue of filter and retention then can drain into storage basin 8 by corresponding slag notch, deal with again after carrying out unified collection.

On the basis of above-mentioned each specific embodiment, the sewage treatment system of specific embodiment of the present invention offer System, the bacterium colony on attachment bedding to make anaerobic organism turntable and aerobic biological rotating disk are preferably contacted with sewage, reach more preferable Treatment effect, the triangular grid structures 11 of the adjacent two attachment beddings in front and back can have different arrangement modes, excellent Choosing is staggered, and the protrusion 12 of front side attachment bedding is made to be located at the tri-angle-holed interior of rear side attachment bedding, can be to make attachment base Bacterium colony and waste water on bed more evenly, and reduce the setting gap of attachment bedding.

There are many triangular grid structures 11 are specific, in a specific embodiment, triangular grid structures 11 are specific It can be intersected by multiple first connecting rods, multiple second connecting rods and multiple third connecting rods and be connected, wherein multiple first connecting rods are flat Row is arranged and arranges at equal intervals, and multiple second connecting rods are arranged in parallel and arrange at equal intervals, and multiple third connecting rods are arranged in parallel and wait Be intervally arranged, and first connecting rod, second connecting rod and third connecting rod intersection be connected to form it is each tri-angle-holed.

To maximize the quantity of 11 intermediate cam shape hole of triangular grid structures and protrusion 12, the specific surface area of fan-shaped disc Maximize, specifically, it is tri-angle-holed preferably equilateral triangle hole, and it is tri-angle-holed be uniformly distributed in fan-shaped frame 10, then Spacing between spacing, two adjacent second connecting rods and two adjacent thirds between two adjacent first connecting rods connect Spacing between bar is in the same size, and between first connecting rod and second connecting rod, third connecting rod and second connecting rod, third connecting rod Angle is 60 °.

For the specific surface area for further increasing fan-shaped disc, can be all provided in the front and back of each tri-angle-holed infall There is protrusion 12, positioned at positive raised 12 and the one-to-one correspondence of protrusion 12 positioned at the back side, and corresponding two protrusions 12 can be with Coaxial arrangement.

Further, the sewage disposal system that specific embodiment of the present invention provides, may be used also in fan-shaped frame 10 Radial support item 14 to be equipped with the circumferential support bar 13 parallel with its arc-shaped frame and with radially extending, circumferential support The both ends of item 13 and radial support item 14 are fixedly linked with fan-shaped frame 10, and circumferential support bar 13 and radial support item 14 are mutual Intersect, and triangular grid structures 11 are divided into multiple partial structurtes, circumferential support bar 13 and radial support item 14 can be used In support triangle shape network 11, the structural strength of fan-shaped disc can be increased, extend the service life of fan-shaped disc.

Further, it can be equipped on circumferential support bar 13, radial support item 14 and divider multiple along its length The protrusion 12 that degree direction is intervally arranged, and protrusion 12 is preferably distributed in the front and back of divider, to guarantee fan-shaped disc ratio The maximization of surface area.

On the basis of above-mentioned each specific embodiment, to be positioned convenient for the assembling of each attachment bedding, in each fan-shaped disc Side can be equipped with boss 15, other side position corresponding with boss 15 equipped with and the matched card slot 16 of boss 15, front and back When two attachment beddings connection of adjacent position, each boss 15 on an attachment bedding, which corresponds to, to be caught on another attachment bedding Each card slot 16 in, realize the assembling positioning of former and later two attachment beddings, it is simple and convenient, and firm and reliable connection.

Specifically, can be arranged simultaneously in fan-shaped disc close to the position in its center of circle and on the position far from its center of circle convex Platform 15, and boss 15 on two positions being arranged radially along fan-shaped disc, attachment bedding can be improved and be connected firmly Reliability, two attachment beddings for keeping front and back adjacent are well fixed on together, even if former and later two adhere in rotary course Relative displacement will not occur for bedding.

Further, the through-hole 17 fixed convenient for the fan-shaped disc of front-rear position can also be equipped in sector disk on piece； When the occlusion of each attachment bedding is not in place or bite force is insufficient, connecting rod can be passed through into through-hole 17, and at the both ends of connecting rod Nut is screwed on, nut is tightened and compresses each attachment bedding to form an entirety.

Sewage disposal system provided by the utility model is described in detail above.It is used herein specifically a Example is expounded the principles of the present invention and embodiment, this reality that the above embodiments are only used to help understand With novel method and its core concept.It should be pointed out that for those skilled in the art, not departing from this Under the premise of utility model principle, several improvements and modifications can be made to this utility model, these improvement and modification are also fallen Enter in the protection scope of the utility model claims.

Claims (10)

1. a kind of sewage disposal system, which is characterized in that including be sequentially communicated by channel anaerobic pond, aerobic tank, flocculation basin, Filtering ponds and sterilization pool, the water inlet of the anaerobic pond are equipped with the separation of the pulp water for removing large granular impurity in sewage Device is equipped with the anaerobic organism turntable for decomposing dirty Organic substance in water in the anaerobic pond, and installation is useful in the aerobic tank In the aerobe turntable for absorbing dirty Organic substance in water, the flocculation basin is equipped with for adding flocculation medicament into pond so that dirt At the chemicals dosing plant of floc sedimentation, the sterilization pool is equipped with for carrying out disinfection the ultraviolet disinfection of processing to sewage for dirt flocculation in water Equipment；The anaerobic organism turntable and the aerobe turntable include shaft, the motor for driving the shaft and The multiple attachment beddings being installed in the shaft are spaced, the attachment bedding includes multiple annular arrays and is sequentially connected Fan-shaped disc, the sector disc includes fan-shaped frame and the triangular grid structures by the fan-shaped frame cladding, described Be covered on triangular grid structures it is tri-angle-holed, the adjacent tri-angle-holed infall be equipped with protrusion.

2. sewage disposal system according to claim 1, which is characterized in that the anaerobic pond and the aerobic tank are laterally gone here and there Connection setting, the water inlet of the anaerobic pond are located at its side far from the aerobic tank, and the anaerobic pond and the aerobic tank are logical Cross the through-hole connection in pond body；The flocculation basin, the filtering ponds and the ultraviolet disinfection equipment are arranged and are set to laterally side by side The front side of the aerobic tank；It is equipment room in the front side of the anaerobic pond, power distribution cabinet is equipped in the equipment room and for controlling Make the controller of the motor, the chemicals dosing plant and the ultraviolet disinfection equipment.

3. sewage disposal system according to claim 2, which is characterized in that the aerobe turntable is close to described aerobic One end of pond water outlet is equipped with for part of contaminated water and biological bacteria to be dropped back into the part flow arrangement flowing in the anaerobic pond.

4. sewage disposal system according to claim 3, which is characterized in that further include the flow for adjusting the discharge of sewage Adjuster, the water outlet of the flow regulator are connected to the water inlet of the slag-water separator.

5. sewage disposal system according to claim 4, which is characterized in that it further include storage basin, the slag-water separator It is connected to the storage basin with the slag notch of the filtering ponds.

6. according to sewage disposal system described in claim 2 to 5 any one, which is characterized in that two adjacent institutes of front and back The triangular grid structures for stating attachment bedding are staggered, and the protrusion of the front side attachment bedding is made to be located at rear side It is described to adhere to the described tri-angle-holed interior of bedding.

7. sewage disposal system according to claim 6, which is characterized in that the triangular grid structures include multiple flat Row setting and the first connecting rod arranged at equal intervals, multiple second connecting rods for being arranged in parallel and arranging at equal intervals and multiple parallel The third connecting rod for being arranged and arranging at equal intervals, the first connecting rod, the second connecting rod and the third connecting rod intersect the shape that is connected At described tri-angle-holed；It is described it is tri-angle-holed be equilateral triangle hole, and it is described it is tri-angle-holed in the fan-shaped frame uniformly Distribution.

8. sewage disposal system according to claim 7, which is characterized in that each tri-angle-holed infall front and The back side is equipped with the protrusion, and the protrusion positioned at the positive protrusion and positioned at the back side corresponds, and corresponding Two protrusion coaxial arrangements.

9. sewage disposal system according to claim 8, which is characterized in that be equipped with and its arc-shaped side in the sector frame The parallel circumferential support bar of frame and with the radial support item that radially extends, the circumferential direction support bar and the radial support The both ends of item are fixedly linked with the fan-shaped frame, and the circumferential direction support bar and the radial support item intersect, and will The triangular grid structures are divided into multiple partial structurtes.

10. sewage disposal system according to claim 6, which is characterized in that the side of each fan-shaped disc is equipped with convex Platform, other side position corresponding with the boss are equipped with and the matched card slot of the boss, two institutes of front and back adjacent position When stating attachment bedding connection, each boss correspondence on an attachment bedding is caught on another described attachment bedding In each card slot.