CN215855331U

CN215855331U - Biological rotating disc processing device

Info

Publication number: CN215855331U
Application number: CN202122595998.2U
Authority: CN
Inventors: 叶宣鹏
Original assignee: Hongzhi Environmental Technology Development Shanghai Co ltd
Current assignee: Hongzhi Environmental Technology Development Shanghai Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-02-18
Anticipated expiration: 2031-10-27

Abstract

The present invention relates to a biological rotating disk processing device, comprising: a turntable slot for accommodating sewage; a plurality of biological discs are arranged on a rotating shaft in series to form a biological rotating disc, the rotating shaft is longitudinally arranged above the rotating disc groove, at least one part of the biological rotating disc can be immersed in sewage in the rotating disc groove, and the rest part of the biological rotating disc is exposed in the air; the drive the pivot makes carousel pivoted drive arrangement, the direction of rotation of carousel is unanimous with sewage flow direction, the last microorganism that adsorbs of carousel makes it grows out the biomembrane on the surface through sewage when the carousel rotates.

Description

Biological rotating disc processing device

Technical Field

The utility model relates to sewage treatment equipment, in particular to a biological rotating disc treatment device.

Background

Biological Rotating disc (RBC), also called Rotating disc type Biological filter, is a wastewater treatment technology by a biofilm method, and is artificial reinforcement for sewage irrigation and land treatment.

The biological rotating disk is a biological treatment structure consisting of a water tank and a rotating disk body partially immersed in sewage, mainly comprises a rotating disk (disk body), a contact reaction tank, a rotating shaft, a driving device and the like, and a protective cover can be arranged above the oxidation tank to play roles of wind and rain shielding and heat preservation if necessary.

The rotating disc body of the existing biological rotating disc needs to be periodically added with liquid medicine and bacteria, and the use and the maintenance are inconvenient.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a biological rotating disk processing device which is easy to use and maintain.

To this end, the present invention provides a bio-disc processing apparatus comprising: a turntable slot for accommodating sewage; a plurality of biological discs are arranged on a rotating shaft in series to form a biological rotating disc, the rotating shaft is longitudinally arranged above the rotating disc groove, at least one part of the biological rotating disc can be immersed in sewage in the rotating disc groove, and the rest part of the biological rotating disc is exposed in the air; the drive the pivot makes carousel pivoted drive arrangement, the direction of rotation of carousel is unanimous with sewage flow direction, the last microorganism that adsorbs of carousel makes it grows out the biomembrane on the surface through sewage when the carousel rotates.

Preferably, the bio-disc is formed by spinning polyethylene and polypropylene and combining the spun polyethylene and polypropylene together through three-dimensional structure puncture.

Preferably, the biological rotating disc treatment device comprises a plurality of rotating disc grooves which are longitudinally connected in series, the biological discs of each rotating disc groove are connected in series through a single rotating shaft, the water inlet of the first rotating disc groove is used for inputting sewage, the water outlet of the last rotating disc groove is used for discharging purified water, and the water inlet of each rotating disc groove in the middle is communicated with the adjacent water outlet, so that the single-shaft multi-stage biological rotating disc is formed.

Preferably, the number of the plurality of carousel slots connected in series longitudinally is four, forming a single-axis quaternary biological carousel.

Preferably, the biological rotating disc treatment device comprises a plurality of rotating disc grooves which are transversely arranged side by side, the biological discs of each rotating disc groove are arranged on respective rotating shafts, the water inlet of the first rotating disc groove is used for inputting sewage, the water outlet of the last rotating disc groove is used for discharging purified water, and the water inlet of each rotating disc groove positioned in the middle is communicated with the adjacent water outlet, so that the multi-shaft multi-stage biological rotating disc is formed.

Preferably, the number of the plurality of turntable grooves arranged side by side in the longitudinal and transverse directions is three, so that three-axis three-stage biological rotating disks are formed.

Preferably, the biological rotating disc processing device further comprises a pneumatic flushing device for flushing the biological rotating disc.

The utility model has the following advantages:

1. the biological disc is adopted to generate the biological membrane, the culture maturation time is short, and the culture can be completed within 7-10 days generally.

2. Simple maintenance and management, low power cost, low noise and no disc surface blockage.

3. By adopting the multi-stage biological rotating disc, the purification degree of the treated water is high, and the effluent is clear. For example, the four-stage biological rotating disc can treat domestic sewage, and the BOD removal rate of the treated water can reach more than 95%.

4. The sludge yield is low and is about 1/2 of an activated sludge treatment system, the sludge sedimentation performance is good, and the sludge and water separation is easy.

5. The operation is more flexible, and the contact time and the aeration intensity of the sewage and the microorganisms can be adjusted by adjusting the rotating speed of the rotating disc.

6. Stable operation and strong impact load resistance. Ultra-high concentration organic wastewater with BOD value more than 1000mg/L and ultra-low concentration organic sewage less than 10 mgL.

7. The utility model is especially suitable for cold areas at high altitude.

Drawings

FIG. 1 is a schematic cross-sectional view illustrating a purification mechanism of the rotating biological disk processing apparatus of the present invention.

FIG. 2 is a schematic longitudinal sectional view illustrating a purification mechanism of the rotating biological disk processing apparatus of the present invention.

FIG. 3 is a schematic view of an embodiment of the present invention comprising a uniaxial multistage biological rotating disk.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a schematic view of an embodiment of the present invention comprising a multi-axis, multi-stage bio-disc.

Fig. 6 is a sectional view taken along line B-B of fig. 5.

Detailed Description

Referring to fig. 1-6, the present invention is a bio-disc treatment apparatus for treating sewage. The apparatus comprises a carousel tank 1, also called oxidation tank, for containing the effluent. A plurality of biological rotating discs 2 are arranged on a rotating shaft 3 in series to form a biological rotating disc group. The rotating shaft 3 is arranged above the rotary disc tank 1 along the longitudinal direction, at least one part of the biological rotary disc 2 can be immersed in the sewage in the rotary disc tank 1, and the rest part is exposed to the air.

The rotary shaft 3 is driven by a driving device (not shown) so that the bio-disc 2 is rotated. As shown in fig. 1, the direction of rotation of the bio-disc 2 coincides with the direction of sewage flow. Microorganisms are adsorbed on the biological rotating disc 2, so that a biological film 4 grows on the surface of the biological rotating disc through sewage when the biological rotating disc rotates. The biological discs are made of polyethylene and polypropylene spinning, and each biological rotating disc 2 comprises a plurality of biological discs which are combined together through three-dimensional structure puncture.

Before the biological rotating disc treatment device of the utility model plays a role of purifying sewage, a biological film 4 needs to grow on the surface of the rotating disc. The sewage or wastewater can not be discharged from the rotary disk tank 1, so that activated sludge suitable for the sewage to be treated is cultured at the beginning, then the activated sludge is placed in the rotary disk tank 1 (preferably, activated sludge for the similar wastewater treatment is directly introduced), the disk is rotated at a low speed for 12-24 hours under the condition of no water inflow, a small amount of microorganisms are adhered to the disk, then water inflow is started, and the water inflow gradually grows according to a biological membrane and is increased from small to large until the full load operation is carried out.

The biological rotating disk is one of the technologies for treating wastewater by a biological method, and utilizes the physiological function of the nascent metabolism of microbial communities in the nature to treat organic pollutants in the wastewater. Commonly used microorganisms include bacteria, fungi, algae, protozoa, and/or metazoan. Microorganisms are attached to and grow on the disc, the microorganisms immersed on the rotary disc part in the rotary disc groove 1 are contacted and adsorbed with the sewage in the rotary disc groove 1, and the disc is driven by the driving device to rotate at a low speed. When the submerged part leaves the oxidation tank 1, the sewage forms a water film on the surface of the disk, and the water film absorbs oxygen from the air, so that the biological film decomposes the adsorbed organic substances under aerobic conditions. Thus, the disk sheet is contacted with the waste water and the air alternately in the continuous rotation process to carry out the cycle process of adsorption, oxygen absorption and oxidative decomposition, so that the sewage is purified. Meanwhile, the biological film on the disk continuously grows and thickens, the aged biological film falls off by the shearing force when the disk rotates, and the biological film is updated.

The utility model can also comprise a pneumatic flushing device (not shown) for flushing the biological rotating disc, so as to improve the updating of the biological membrane, be beneficial to degrading pollutants in water and improve the treatment efficiency of the device.

Referring to the embodiment of fig. 3-4, the bio-disc processing apparatus of the present invention includes a single-axis multi-stage bio-disc. In this embodiment, there are four stages of a single shaft. The biological rotating disk processing device comprises four rotating disk tanks 1 which are longitudinally connected in series, and biological disks 2 of each rotating disk tank 1 are connected in series through a single rotating shaft 3. Each carousel trough 1 comprises a water inlet 11 and a water outlet 12. The water inlet 11a of the first rotary disk groove 1 is used for inputting sewage, the water outlet 12d of the last (fourth) rotary disk groove is used for discharging purified water, and the

water inlet

11b, 11c and 11d of each rotary disk groove positioned in the middle is communicated with the

water outlet

12a, 12b and 12c adjacent to the former water outlet.

Referring to the embodiment of fig. 5-6, the bio-disc processing apparatus of the present invention includes a multi-axis multi-stage bio-disc. In this embodiment, three axes and three stages. The biological rotating disk treatment comprises three rotating disk tanks 1 which are transversely arranged side by side, wherein the biological disks 2 of each rotating disk tank are arranged on respective rotating shafts 3, the water inlet 11a of the first rotating disk tank 1 is used for inputting sewage, the water outlet 12c of the last (third) rotating disk tank 1 is used for discharging purified water, and the

water inlets

11b and 11c of each rotating disk tank positioned in the middle are communicated with the

water outlets

12a and 12b adjacent to the former water outlet.

If the rotary disc is used for nitrifying bacteria, the biofilm formation time is increased by 2-3 weeks, and the biochemical oxygen demand concentration of inlet water is controlled to be below 30 mg/L. Because the autotrophic nitrifying bacteria have long generation time and slow propagation and growth, if the concentration of organic matters in the inlet water is too high, abnormal bacteria in the membrane can be dominant, thereby inhibiting the growth of the autotrophic nitrifying bacteria. When the nitrite appears in the water, the nitrification is already dominant on the biological membrane, and the membrane hanging work is declared to be finished.

The environmental conditions required for biofilm formation require that the influent water has appropriate nutrition, temperature (e.g., no less than 20 ℃), pH, etc., to avoid the ingress of large amounts of poisons. Since the initial film amount is small, the rotation speed of the disk needs to be reduced so as not to excessively increase the dissolved oxygen in the oxidation tank. The characteristics of the biological membrane on the biological rotating disc are completely the same as those of the biological membrane on the biological filter, the organisms are distributed in a grading way, the first-stage organisms are usually mainly zoogloea bacteria, the membrane is also the thickest, filamentous bacteria, protozoa and metazoa appear in the following stages in sequence along with the reduction of the concentration of organic matters, the types of the organisms are continuously increased, but the quantity of the biological membrane, namely the thickness of the membrane, is reduced, and each stage has characteristic biological groups according to the difference of the sewage quality. When the water quality concentration or the rotary disc load changes, the characteristic biological layer is also pushed or moved backwards along with the change of the water quality concentration or the rotary disc load. The working condition of the biological rotating disk can be known through observation of the biological phase, the problem can be found, and the problem can be solved in time.

The normal biological membrane is thin, the thickness is about 15 mm, the appearance is rough, the adhesive tape is sticky, and the color is grey brown. The detachment of excess biofilm on the disc is normally replaced and is then covered by new biofilm. The turntable for nitration has more biological membranes, smooth appearance and golden yellow color. This is a normal replacement followed by a new film covering.

Claims

1. A rotating biological disk processing apparatus comprising:

a turntable slot for accommodating sewage;

a plurality of biological discs are arranged on a rotating shaft in series to form a biological rotating disc, the rotating shaft is longitudinally arranged above the rotating disc groove, at least one part of the biological rotating disc can be immersed in sewage in the rotating disc groove, and the rest part of the biological rotating disc is exposed in the air;

a driving device for driving the rotating shaft to rotate the biological rotating disk, wherein the rotating direction of the biological rotating disk is consistent with the flowing direction of the sewage,

the biological rotating disc is characterized in that microorganisms are adsorbed on the biological rotating disc, so that a biological film grows on the surface of the biological rotating disc through sewage when the biological rotating disc rotates.

2. The rotating bio-disc processing apparatus of claim 1, wherein the bio-discs are assembled together by three-dimensional structural piercing to form the rotating bio-disc.

3. The rotating biological disk processing device as claimed in claim 1 or 2, comprising a plurality of rotating disk tanks connected in series longitudinally, wherein the biological disks of each rotating disk tank are connected in series through a single rotating shaft, the water inlet of the first rotating disk tank is used for inputting sewage, the water outlet of the last rotating disk tank is used for discharging purified water, and the water inlet of each rotating disk tank positioned in the middle is communicated with the water outlet adjacent to the former water outlet, so that a single-shaft multistage rotating biological disk is formed.

4. The rotating biological disk processing apparatus of claim 3 wherein the plurality of disk slots connected in series longitudinally is four, forming a single-axis quaternary biological disk.

5. The rotating biological disk processing device as claimed in claim 1 or 2, which comprises a plurality of rotating disk tanks which are transversely arranged side by side, wherein the biological disks of each rotating disk tank are arranged on respective rotating shafts, the water inlet of the first rotating disk tank is used for inputting sewage, the water outlet of the last rotating disk tank is used for discharging purified water, and the water inlet of each rotating disk tank positioned in the middle is communicated with the water outlet adjacent to the former water outlet, so that a multi-shaft multi-stage rotating biological disk is formed.

6. The device according to claim 5, wherein the number of the carousel slots is three, and three carousel slots are arranged side by side in the longitudinal and transverse directions to form a three-axis three-stage carousel.

7. The rotating biological disk processing apparatus of claim 1 or 2, further comprising a pneumatic washing device for washing the rotating biological disk.

8. The rotating biological disk processing apparatus of claim 1 or 2, wherein the microorganisms comprise bacteria, fungi, algae, protozoa, and/or metazoans.