CN215756907U

CN215756907U - Integrated biological rotating disc device

Info

Publication number: CN215756907U
Application number: CN202121586166.8U
Authority: CN
Inventors: 闫宝亨; 戴捷; 刘瑞强; 周琴; 范聪颖; 李孟玉
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-02-08
Anticipated expiration: 2031-07-13

Abstract

The utility model discloses an integrated biological rotating disc device which comprises a water inlet pipe, a sewage tank, an MBR membrane tank and a water outlet pipe, wherein the water inlet pipe is communicated with the bottom of the sewage tank, a biological rotating disc and freely-moving suspended biological fillers are arranged in the sewage tank, the water outlet of the sewage tank is communicated with the MBR membrane tank through a connecting pipe, an MBR membrane assembly is arranged in the MBR membrane tank, a pipeline mixer is arranged on the connecting pipe, and the water outlet of the connecting pipe is positioned below the MBR membrane assembly. The device has solved current biological rotating disc reactor treatment effect and has hanged down, and the denitrogenation effect is poor, and the oxygen utilization ratio is low, the not good problem of dephosphorization effect, and the running cost is low.

Description

Integrated biological rotating disc device

Technical Field

The utility model relates to the technical field of sewage treatment, in particular to an integrated biological rotating disc device.

Background

The biological rotating disk is a sewage treatment technology of a biological membrane method, is proposed by German in the 60 s of the 20 th century and is applied to the field of sewage treatment. The treatment method enables the growth and breeding of bacteria and bacteria microorganisms, protozoa and other microorganisms on the disc of the biological rotating disc to form a layer of biological membrane; the biological film has strong impact load resistance, less sludge production, easy precipitation of the fallen biological film and good purification effect compared with a specific sludge method. In the aspects of process operation and maintenance, the biological rotating disk has the characteristics of no sludge backflow, no filamentous bacteria expansion phenomenon, low energy consumption, convenient management and the like. However, the traditional biological rotating disk has the problems of low organic load, poor sanitary condition, poor denitrification effect, larger occupied area and the like in the sewage treatment process.

At present, the problem of poor denitrification effect is generally solved by designing an anoxic and aerobic two-stage biological rotating disk process treatment technology, but the construction of an anoxic biological rotating disk tank and an aerobic biological rotating disk tank increases capital construction cost and floor area, simultaneously, power consumption and hydraulic retention time are increased when equipment runs, and the two-stage biological rotating disk needs nitrification liquid to flow back in the running process, thereby increasing running cost.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides an improved integrated biological rotating disc device which is low in energy consumption, high in efficiency, small in occupied area and good in denitrification effect.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

integration rotating biological disk device, including inlet tube, effluent water sump, MBR membrane cisterna and outlet pipe, the inlet tube with the bottom intercommunication of effluent water sump, be equipped with the suspended biological filler of rotating biological disk and free removal in the effluent water sump, the delivery port of effluent water sump pass through the connecting pipe with MBR membrane cisterna intercommunication, be provided with the MBR membrane module in the MBR membrane cisterna, install the pipe mixer on the connecting pipe, the delivery port of connecting pipe is located the below of MBR membrane module, the pipe mixer with add the medicine bucket intercommunication.

Preferably, the biological rotating disc comprises a motor, a rotating disc shaft and a rotating disc, the rotating disc is mounted on the rotating disc shaft, and the output end of the motor is fixedly connected with one end of the rotating disc shaft; more preferably, the turntable platter is comprised of a circular, corrugated plastic sheet.

Preferably, overflow weirs are arranged at the water inlet of the connecting pipe and the water inlet of the water outlet pipe; more preferably, the overflow weir is a tooth-shaped overflow weir.

Preferably, the suspended biological filler is of a hollow spherical structure, the cavity of the spherical structure is spherical, and the shell of the spherical structure is provided with a pentagonal pyramid-shaped honeycomb through hole and a hexagonal pyramid-shaped honeycomb through hole.

Preferably, the dosing barrel is arranged above the MBR membrane tank.

Preferably, the bottoms of the sewage tank and the MBR membrane tank are both provided with sludge grooves, and sludge discharge pipes are arranged in the sludge grooves.

The utility model has the beneficial effects that: 1) the spherical suspended biological filler is combined with the biological rotating disk, and the spherical suspended biological filler is mostly concentrated at the bottom of the sewage tank due to the density of the spherical filler, so that the dissolved oxygen of the tank body at the upper part is high, and the dissolved oxygen of the tank body at the lower part is low, and an anoxic and aerobic environment can be formed in one reaction tank; 2) under the combined action of the rotation of the biological rotating disc and the flow direction of sewage, the whole device does not need to return nitrified liquid; meanwhile, the dissolved oxygen gradient concentration of the rotating disc and the biological film on the suspended biological filler from inside to outside can realize synchronous nitrification and denitrification, thereby ensuring that the total nitrogen content of the effluent can reach the discharge standard; 3) the combination of the suspended biological filler and the biological rotating disc increases the biomass in the whole tank body, greatly improves the whole volume load of the tank body, drives the suspended biological filler on the lower layer to stir together when the biological rotating disc operates, ensures that the sewage on the lower layer is fully contacted with a biological film, and shortens the treatment time of the sewage; 4) the rotary table drives the suspended biological filler, and the suspended biological filler and the rotary table are continuously collided and rubbed with each other under the power brought by the rotation of the rotary table, so that the biological films with basically aged surfaces of the suspended biological filler and the rotary table fall off under the action of physical shearing force, the updating and the updating of the biological films are accelerated, the activity of the biological films is enhanced, and the biological films are more efficient and stable; 5) the device can supply oxygen by rotating the turntable plate, thereby avoiding aeration and gas supply and greatly saving the cost; 6) and the MBR membrane tank is used for replacing a sedimentation tank, so that the occupied area of the device can be reduced, and the efficiency of sludge-water separation can be improved.

Drawings

FIG. 1 is a schematic sectional front view of the integrated biological rotating disk device of the present invention;

FIG. 2 is a schematic top view of the integrated biological rotating disk device of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the utility model and simplicity of description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

The integrated biological rotating disc device shown in fig. 1-2 comprises a water inlet pipe 1, a sewage tank 2, an MBR membrane tank 3 and a water outlet pipe 4 which are sequentially arranged from left to right. The inlet tube 1 sets up in the left side of effluent water sump 2, and the delivery port of inlet tube 1 sets up in the bottom of effluent water sump 2, and the inside of effluent water sump 2 is provided with biological rotating disk 6 and the suspended biological filler 5 that can freely remove.

The suspended biological filler 5 is a hollow spherical structure, and the internal cavity is preferably spherical; the spherical shell of the filler is also provided with a through hole communicated with the inner cavity, and the through hole can be specifically arranged into a pentagonal pyramid and a hexagonal cone by referring to black and white lattices of a football, and the cone tip faces the center of the sphere. The suspended biological filler 5 provides a carrier for microorganisms, and is beneficial to the attachment and growth of the microorganisms; the hollow spherical filler is more beneficial to realizing synchronous nitrification and denitrification. The density of the suspended biological fillers 5 is slightly heavier than that of water, and the suspended biological fillers are distributed at the bottom of the sewage tank in a natural state. Can move freely in the sewage tank 2 under the inflow water flow and the stirring of the biological rotating disk 6.

The biological rotating disk 6 is composed of a motor 61, a rotating disk shaft 62 and a rotating disk 63, wherein the rotating disk 63 can be circular and wavy plastic disks, the rotating disk 63 is arranged on the rotating disk shaft 62, and the output end of the motor 61 is fixedly connected with the end part of the rotating disk shaft 62.

The top of the right side of the sewage tank 2 is provided with an overflow weir 11, and effluent of the sewage tank 2 passes through the overflow weir 11 and then enters the MBR membrane tank 3 through a connecting pipe 7; be provided with in the MBR membrane cisterna 3 and be used for filterable MBR membrane module 8, the delivery port of connecting pipe 7 sets up in the below of MBR membrane module 8, and the right side top of MBR membrane cisterna 3 is provided with overflow weir 11 equally, and the supernatant in the MBR membrane cisterna 3 discharges through outlet pipe 4 behind the overflow weir 11 in this pond. Specifically, the overflow weir 11 is a tooth-shaped overflow weir, and can be made of stainless steel material.

A pipeline mixer 9 for adding medicine is arranged on the connecting pipe 7, specifically a three-way pipeline mixer 9 made of carbon steel material can be adopted, and a branch pipe of the pipeline mixer 9 is communicated with a medicine adding barrel 10; the dosing barrel 10 can be arranged above the MBR membrane tank 3 to facilitate the addition of the medicament.

The bottoms of the sewage tank 2 and the MBR membrane tank 3 are respectively provided with a sludge tank, and a sludge discharge pipe 12 is arranged in the sludge tank.

During operation, sewage enters the bottom of the sewage tank 2 from the water inlet pipe 1, is subjected to hydrolytic acidification, denitrification and partial nitrification through microorganisms on the suspended biological filler 5, is stirred through the rotation of the biological rotating disk 6, so that the hydrolytic acidification and the denitrification are more thorough, meanwhile, aerobic reaction is performed on the rotating disk 63, organic matters are decomposed under the action of microorganisms loaded on the biological rotating disk, and ammonia nitrogen is nitrified and partially and synchronously denitrified. Compared with the traditional biological rotating disk, the biological membrane on the traditional rotating disk is thin, and the inner layer of the biological membrane is difficult to form a stable anoxic or anaerobic zone, so that the denitrification is not facilitated. The improved integrated biological rotating disk device is characterized in that microorganisms are loaded on the disk of the biological rotating disk only, suspended biological fillers are loaded on the lower part of a sewage pool of the device, each suspended biological filler is loaded with the microorganisms, and a stable anoxic or anaerobic zone can be formed. Compared with an A/O two-section biological rotating disc, the composite biological rotating disc not only ensures that nitrification and denitrification are completed in the same pool body, but also completely avoids the lack of carbon source in the whole system, does not need nitrifying liquid to flow back, and overcomes the problem of low C/N ratio, thereby greatly improving the total nitrogen removal rate of the biological rotating disc.

After the sewage entering the sewage tank 2 is subjected to hydrolytic acidification, nitrification, denitrification and other treatments, the sewage enters the pipeline mixer 9 under the control of an overflow weir 11 in the sewage tank 2; in the pipeline mixer 9, the sewage is fully mixed with the medicament and then enters the bottom of the MBR membrane tank 3 through the connecting pipe 7. The sewage in the MBR membrane tank 3 passes through the MBR membrane module 8 from bottom to top to separate sludge and water. In the process, the sludge and phosphorus-containing flocs suspended in the sewage are both precipitated in a sludge tank at the bottom and discharged through a sludge discharge pipe 12, thereby achieving the effect of phosphorus removal. And overflowing the precipitated sewage into an overflow weir 11 of the MBR membrane tank 3, and finally discharging the effluent up to the standard under the control of the overflow weir 11.

The present invention is not limited to the embodiments according to the above-described embodiments, and various changes may be made by those skilled in the art, but any changes equivalent or similar to the present invention are intended to be included within the scope of the claims.

Claims

1. The utility model provides an integration rotating biological disk device, includes inlet tube (1), effluent water sump (2), MBR membrane cisterna (3) and outlet pipe (4), its characterized in that, inlet tube (1) with the bottom intercommunication of effluent water sump (2), be equipped with rotating biological disk (6) and the suspension biofilm carrier (5) of free removal in effluent water sump (2), the delivery port of effluent water sump (2) pass through connecting pipe (7) with MBR membrane cisterna (3) intercommunication, be provided with MBR (8) in MBR membrane cisterna (3), install pipeline mixer (9) on connecting pipe (7), the delivery port of connecting pipe (7) is located the below of MBR membrane module (8), pipeline mixer (9) and medicine bucket (10) intercommunication.

2. The integrated biological rotating disc device according to claim 1, wherein the biological rotating disc comprises a motor (61), a rotating disc shaft (62) and a rotating disc (63), the rotating disc (63) is mounted on the rotating disc shaft (62), and the output end of the motor (61) is fixedly connected with one end of the rotating disc shaft (62).

3. The integrated bio-disc device according to claim 2, wherein said disc (63) is comprised of circular, undulating plastic sheets.

4. The integrated biological rotating disc device according to claim 1, wherein overflow weirs (11) are arranged at the water inlet of the connecting pipe (7) and the water inlet of the water outlet pipe (4).

5. The integrated biological rotating disc device according to claim 4, wherein the overflow weir (11) is a toothed overflow weir.

6. The integrated biological rotating disk device according to claim 1, wherein the suspended biological filler (5) is a hollow spherical structure, the cavity of the spherical structure is spherical, and a housing of the spherical structure is provided with honeycomb-shaped through holes in a pentagon cone shape and a hexagon cone shape.

7. The integrated biological rotating disc device according to claim 1, wherein the dosing tank (10) is arranged above the MBR membrane tank (3).

8. The integrated biological rotating disc device according to claim 1, wherein the bottoms of the sewage tank (2) and the MBR membrane tank (3) are provided with sludge tanks, and the sludge tanks are internally provided with sludge discharge pipes (12).