An activated sludge-based sewage treatment apparatus and method

Abstract

The application relates to a sewage treatment device and method based on activated sludge, which comprises a pool body, a rotating device arranged at the center of the pool body, a rotating body arranged on the rotating device and located in the pool body, a plurality of treatment bins arranged on the rotating body and uniformly arranged around the rotating device, a plurality of sub-treatment bins sequentially arranged in the treatment bins from top to bottom, suspended balls filled in the sub-treatment bins, an input end arranged on one end of the treatment bin away from the rotating device, an output end arranged on the bottom surface of the sub-treatment bin, and a recovery channel for connecting a sludge treatment device. The sewage treatment device and method based on activated sludge disclosed by the application can simultaneously undertake the functions of treatment and sedimentation through the mode of partition treatment and continuous treatment, and can improve the sewage treatment speed through the mode of active dispersion and the mode of adjusting the volume of each partition.

Description

TECHNICAL FIELD

[0001] The present application relates to the sewage treatment technical field, especially to a sewage treatment device based on activated sludge and a treatment method. BACKGROUND

[0002] The activated sludge sewage treatment method is to remove the dissolved and colloidal state of the biodegradable organic matter and the suspended solids and other substances that can be adsorbed by the activated sludge from the sewage by means of the microorganisms suspended in the water, and also to remove a part of phosphorus and nitrogen, which is widely used in sewage treatment.

[0003] At present, one of the main factors affecting the activated sludge sewage treatment is the land area, because in the treatment process, the sludge in the water needs to be precipitated, and a special sedimentation tank needs to be set. In addition, the different aggregation of sludge will lead to uneven treatment effect, and small volume of sludge body is easy to die prematurely when receiving impact, while large volume of sludge body has a certain impact resistance due to its large weight, but it is easy to be taken away when recycling sludge, which leads to the failure to complete the required sewage treatment amount in the life cycle.

[0004] In addition, as the concentration of pollutants in the sewage decreases, the treatment capacity of the activated sludge in the middle and late stages will also decrease, which will also increase the land area of the entire treatment system to some extent. SUMMARY

[0005] The present application provides a sewage treatment device based on activated sludge and a treatment method, which simultaneously undertakes the functions of treatment and sedimentation by means of partitioned treatment and continuous treatment, and improves the sewage treatment speed by means of active dispersion and adjustable volume of each partition.

[0006] The above object of the present application is achieved by the following technical scheme:

[0007] In a first aspect, the present application provides a sewage treatment device based on activated sludge, comprising:

[0008] a pool body;

[0009] a rotating device arranged at the center position of the pool body;

[0010] a rotating body arranged on the rotating device and located in the pool body;

[0011] a plurality of treatment bins, each arranged on the rotating body and uniformly arranged around the rotating device, the treatment bin comprising a plurality of sub-treatment bins arranged in sequence from top to bottom;

[0012] a suspension ball filled in the sub-treatment bin;

[0013] an input end arranged on one end of the treatment bin away from the rotating device;

[0014] an output end arranged on the bottom surface of the sub-treatment bin;

[0015] a recovery channel, a first end of which is connected to the pool body, and a second end of which is used to connect to a sludge treatment device.

[0016] In a possible implementation manner of the first aspect, the rotating device comprises:

[0017] a support arranged on the bottom surface of the pool body and located directly above the position where the recovery channel is connected to the pool body;

[0018] a rotating shaft rotationally connected to the support;

[0019] a first driver arranged on the pool body and connected to the rotating shaft or arranged on the pool body and connected to the rotating body.

[0020] In a possible implementation manner of the first aspect, an end of the bottom surface of the sub-treatment bin close to the rotating device is lower than an end of the bottom surface of the sub-treatment bin away from the rotating device.

[0021] In a possible implementation manner of the first aspect, a channel is arranged on a side wall of the sub-treatment bin, and the channel is in communication with the end of the treatment bin away from the rotating device;

[0022] a pipeline, a first end of the pipeline is connected to the input source, and a second end of the pipeline extends into the pool body, then extends into the sub-treatment bin through the channel and close to the bottom surface of the sub-treatment bin;

[0023] The pipeline is configured to inject liquid and gas into the sub-treatment bin.

[0024] In a possible implementation manner of the first aspect, a switching valve connected to the pipeline is further included, and the switching valve is configured to change the medium flowing in the pipeline, and the medium comprises liquid and gas.

[0025] In a possible implementation manner of the first aspect, the densities of the floating balls in the plurality of sub-treatment bins belonging to the same treatment bin are different.

[0026] In a top-down direction, the density of the floating ball tends to increase.

[0027] In a possible implementation manner of the first aspect, the floating ball comprises:

[0028] a spherical body, an internal counterweight is arranged in the spherical body;

[0029] a plurality of protrusions are uniformly distributed on the surface of the spherical body.

[0030] In a possible implementation manner of the first aspect, the treatment bin comprises:

[0031] a plurality of transverse partitions are sequentially arranged on the rotating device in a top-down direction.

[0032] A plurality of swing partitions are slidably connected with the transverse partitions, and the included angle between adjacent swing partitions is adjustable.

[0033] A second driver is arranged on the transverse partition and connected with the swing partition.

[0034] Each swing partition is provided with a second driver.

[0035] In a second aspect, the application provides a sewage treatment method based on activated sludge, comprising:

[0036] The sewage to be treated is fed into a treatment bin, and the activated sludge in the treatment bin starts to treat the sewage; during the treatment process, the treatment bin is slowly rotated.

[0037] The index parameters of the treatment bin are dynamically detected, and when the index parameters change, the volume of the treatment bin is adjusted, so as to increase the density of the activated sludge and maintain the treatment speed of the sewage.

[0038] After the sewage treatment is completed, the reclaimed water obtained is removed from the pool body.

[0039] The feeding of the sewage into the treatment bin and the removal of the reclaimed water from the pool body are continuously performed. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a structural schematic diagram of a sewage treatment device provided by the application.

[0041] Figure 2 is a structural schematic diagram of a treatment bin provided by the application.

[0042] Figure 3 is a structural schematic diagram of a sewage treatment device provided by the application after adding a pipeline.

[0043] Figure 4 is a principle schematic diagram of the working of a switching valve provided by the application.

[0044] Figure 5 is a structural schematic diagram of a suspended ball provided by the application.

[0045] Figure 6 is a connection schematic diagram of a transverse partition and a swing partition provided by the application.

[0046] In the figure, 11, pool body, 12, rotating device, 13, rotating body, 14, processing bin, 15, suspended ball, 16, recycling channel, 17, pipeline, 121, support, 122, rotating shaft, 123, first driver, 141, sub-processing bin, 142, input end, 143, output end, 144, transverse partition, 145, swing partition, 146, second driver, 151, ball, 152, counterweight, 153, thorn, 171, switching valve. DETAILED DESCRIPTION

[0047] The technical solutions in the application will be further described in detail below with reference to the drawings.

[0048] The application discloses a sewage treatment device based on activated sludge, which comprises a pool body 11, a rotating device 12, a rotating body 13, a processing bin 14, a suspended ball 15, and a recycling channel 16.

[0049] Please refer to Figure 1 and Figure 2 , the sewage to be treated flows into the pool body 11 from one side and then flows out from the other side of the pool body 11, and in some possible implementations, the inflow and outflow of the sewage both use pipelines.

[0050] The rotating device 12 is arranged at the center of the pool body 11, and the rotating device 12 is used to drive the rotating body 13 to rotate in the pool body 11.

[0051] In some examples, please refer to Figure 2 , the rotating device 12 comprises a support 121, a rotating shaft 122, and a first driver 123, the support 121 is installed on the bottom surface of the pool body 11 and located directly above the connection between the recycling channel 16 and the pool body 11.

[0052] The rotating shaft 122 is rotationally connected with the support 121, and the first driver 123 is installed on the pool body 11 and connected with the rotating shaft 122, or the first driver 123 is installed on the pool body 11 and connected with the rotating body 13.

[0053] When the first driver 123 is installed on the support 121, the first driver 123 can use a motor; when the first driver 123 is installed on the pool body 11, a track and a moving trolley need to be used, the track is fixedly installed on the pool body 11, the moving trolley moves on the track, and drives the rotating device 12 connected therewith to rotate.

[0054] The rotating body 13 is provided with a plurality of processing bins 14, which are uniformly arranged around the rotating device 12, and the processing bin 14 comprises a plurality of sub-processing bins 141 arranged in sequence from top to bottom, and each sub-processing bin 141 is independent.

[0055] Each of the sub-treatment bins 14 is filled with suspended balls 15, which provide attachment for microorganisms and also serve as the basis for the subsequent dispersion process, so as to ensure that the activated sludge particles (including the attached suspended balls 15) in the water body are uniformly distributed in the sub-treatment bins 141.

[0056] The input end 142 is arranged at one end of the treatment bin 14 away from the rotating device 12, and is generally a direct opening on the treatment bin 14. The output end 143 is arranged on the bottom surface of the sub-treatment bin 141, and serves to output the dead sludge.

[0057] It should be understood that the dead sludge is not active and will fall off the suspended balls 15. After the sludge falls on the bottom surface of the sub-treatment bin 141, it will eventually slide out of the input end 142.

[0058] In some possible implementations, the outer side of the treatment bin 14 is replaced by a barrier net, which is responsible for limiting the suspended balls 15 in the sub-treatment bin 141.

[0059] The first end of the recycling channel 16 is connected to the pool body 11, and the second end is used to connect a sludge treatment device. After the sludge that slides out of the input end 142 falls into the recycling channel 16, it enters the sludge treatment device after passing through the recycling channel 16. After being treated by a dewatering, drying and fermentation process, the sludge can be used as fertilizer or used in other ways.

[0060] In some possible implementations, the end of the bottom surface of the sub-treatment bin 141 close to the rotating device 12 is lower than the end of the bottom surface of the sub-treatment bin 141 away from the rotating device 12, so as to facilitate the sludge to slide to the output end 143.

[0061] Meanwhile, please refer to Figure 3 In order to further avoid the accumulation of sludge on the bottom surface of the sub-treatment bin 141, a channel 144 and a pipe 17 are added. The channel 144 is arranged on the side wall of the sub-treatment bin 141, and is in communication with the end of the treatment bin 14 away from the rotating device 12.

[0062] The first end of the pipe 17 is connected to an input source, and the second end extends into the pool body 11 and then extends into the sub-treatment bin 141 through the channel 144 and close to the bottom surface of the sub-treatment bin 141. The intermediate water (treated sewage meeting the standard) flowing out of the pipe 17 will flush the bottom surface of the sub-treatment bin 141, so that the sludge accumulated on the bottom surface of the sub-treatment bin 141 can be discharged from the output end 143.

[0063] The pipeline 17 is configured to inject liquid and gas into the sub-processing bin 141, that is, the input source of the pipeline 17 has two kinds, which are gas source and water source, at this time, the pipeline 17 needs to be divided into two groups.

[0064] Of course, please refer to Figure 4 A switching valve 171 can also be added, which is configured to change the medium (including liquid and gas) flowing in the pipeline 17, that is, the input source is connected with the pipeline 17 through the switching valve 171.

[0065] In some examples, the density of the suspended balls 15 in the sub-processing bins 141 belonging to the same processing bin 14 is different, specifically, the density of the suspended balls 15 tends to increase in the direction from top to bottom.

[0066] This way can make the distribution of the suspended balls 15 in the sub-processing bin 141 more uniform, avoiding the accumulation of the suspended balls 15 at the top of the sub-processing bin 141. Because the accumulation will cause the gap between the suspended balls 15 to decrease, and there is also an area in the sub-processing bin 141 without the distribution of the suspended balls 15, which will cause the sewage in this area to be unable to be treated or the treatment degree to be limited.

[0067] Please refer to Figure 5 The suspended ball 15 is composed of a ball body 151, a counterweight 152 and a spike 153, the counterweight 152 is located inside the ball body 151, and the spikes 153 are evenly distributed on the surface of the ball body 151. The density of the suspended ball 15 is adjusted by the counterweight, and the specific implementation is that the weight of the counterweight 152 inside the ball body 151 is different.

[0068] For example, the volume of the ball body 151 is fixed, and there is a solid area and a hollow area inside, by adjusting the weight of the solid area, the density of the ball body 151 can be changed. In the production process, different weight counterweight balls can be added inside the ball body 151 to achieve this.

[0069] The function of the spike 153 is to expand the surface area of the ball body 151, increase the attachment area of the microorganisms, and also increase the distance between two suspended balls 15 and reduce the connection strength between two suspended balls 15, so that two suspended balls 15 can be easily separated.

[0070] In some examples, please refer to Figure 6 The processing bin 14 includes a transverse partition 144, a swing partition 145 and a second driver 146, the number of the transverse partitions 144 is multiple, and these transverse partitions 144 are sequentially arranged on the rotating device 12 from top to bottom, the swing partition 145 is slidingly connected with the transverse partition 144, and the included angle between adjacent swing partitions 145 is adjustable.

[0071] The swing partition plate 145 is hinged to the adjacent transverse partition plate 144 or is slidingly fixed through the iron ring on the transverse partition plate 144 at the end close to the rotating device 12. The transverse partition plate 144 and the swing partition plate 145 are supported through the wheel set.

[0072] The second driver 146 is arranged on the transverse partition plate 144 and is connected with the swing partition plate 145, and functions to drive the swing partition plate 145 to change the position, and when the position of the swing partition plate 145 changes, the volume of the corresponding sub-processing chamber 141 also changes.

[0073] The adjustable volume of the sub-processing chamber 141 has the following advantages:

[0074] When the injected sewage has high concentration, the volume of the sub-processing chamber 141 can be increased to reduce the concentration of the injected sewage and improve the impact resistance of the sewage treater disclosed in the application;

[0075] During the sewage treatment process, the volume of the sub-processing chamber 141 is reduced to increase the density of the suspended ball 15 in the sub-processing chamber 141, increase the contact area between the microorganisms and the sewage, and keep the treatment speed of the microorganisms stable or decrease at a smaller amplitude.

[0076] Each swing partition plate 145 is provided with a second driver 146, the second driver 146 can use a waterproof motor, the transverse partition plate 144 is provided with a gear ring, a gear is installed on the rotating shaft of the waterproof motor, and the gear is engaged with the gear ring.

[0077] The second driver 146 drives the swing partition plate 145 to change the position.

[0078] The application also discloses a sewage treatment method based on activated sludge, and the specific steps are as follows:

[0079] The sewage to be treated is sent into the processing chamber 14, and the activated sludge in the processing chamber 14 starts to treat the sewage; and the processing chamber 14 slowly rotates during the treatment process;

[0080] The index parameters of the processing chamber 14 are dynamically detected, the volume of the processing chamber 14 is adjusted when the index parameters change, and then the density of the activated sludge is increased to keep the treatment speed of the sewage;

[0081] After the sewage treatment is completed, the obtained reclaimed water is removed from the pool body 11;

[0082] The sewage sent into the processing chamber 14 and the reclaimed water removed from the pool body 11 are continuously performed.

[0083] The embodiments of the present application are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An activated sludge-based sewage treatment plant, characterized in that, The utility model relates to a sewage treatment device, which comprises: a pool body (11); a rotating device (12) arranged at the center of the pool body (11); a rotating body (13) arranged on the rotating device (12) and located in the pool body (11); a plurality of treatment bins (14) each arranged on the rotating body (13) and uniformly arranged around the rotating device (12), wherein each treatment bin (14) comprises a plurality of sub-treatment bins (141) arranged in sequence from top to bottom; a plurality of suspension balls (15) filled in the sub-treatment bins (141); an input end (142) arranged on one end of the treatment bin (14) away from the rotating device (12); an output end (143) arranged on the bottom surface of the sub-treatment bin (141); a recovery channel (16) having a first end connected to the pool body (11) and a second end used for connecting a sludge treatment device; each treatment bin (14) comprises: a plurality of transverse partitions (144) arranged in sequence from top to bottom on the rotating device (12); a plurality of swing partitions (145) slidably connected to the transverse partitions (144), wherein the included angle between adjacent swing partitions (145) is adjustable; a second driver (146) arranged on the transverse partition (144) and connected to the swing partition (145); each swing partition (145) is provided with one second driver (146).

2. An activated sludge-based sewage treatment plant according to claim 1, characterised in that The rotating device (12) comprises: a support (121) arranged on the bottom surface of the pool body (11) and located directly above the connection position of the recovery channel (16) and the pool body (11); a rotating shaft (122) rotatably connected to the support (121); a first driver (123) arranged on the pool body (11) and connected to the rotating shaft (122) or arranged on the pool body (11) and connected to the rotating body (13).

3. An activated sludge-based sewage treatment plant according to claim 1, characterised in that The end of the bottom surface of the sub-treatment bin (141) close to the rotating device (12) is lower than the end of the bottom surface of the sub-treatment bin (141) away from the rotating device (12).

4. An activated sludge-based sewage treatment plant according to claim 3, characterised in that, A channel is arranged on the side wall of the sub-treatment bin (141), and the channel is in communication with the end of the treatment bin (14) away from the rotating device (12); the utility model further comprises a pipeline (17) having a first end connected to an input source and a second end extending into the pool body (11) and then into the sub-treatment bin (141) through the channel and close to the bottom surface of the sub-treatment bin (141); the pipeline (17) is configured to inject liquid and gas into the sub-treatment bin (141).

5. An activated sludge-based sewage treatment plant according to claim 4, characterised in that, The utility model further comprises a switching valve (171) connected to the pipeline (17), wherein the switching valve (171) is configured to change the medium flowing in the pipeline (17), and the medium comprises liquid and gas.

6. The activated sludge-based sewage treatment apparatus according to claim 1, wherein The densities of the suspension balls (15) in the plurality of sub-treatment bins (141) belonging to the same treatment bin (14) are different; in the direction from top to bottom, the density of the suspension balls (15) tends to increase.

7. An activated sludge-based sewage treatment plant according to claim 1 or 6, c h a r a c t e r i s e d in that The suspension ball (15) comprises: a spherical body (151) internally provided with a counterweight (152); a plurality of protrusions (153) uniformly distributed on the surface of the spherical body (151).

8. An activated sludge-based sewage treatment method using the activated sludge-based sewage treatment device according to any one of claims 1 to 7, characterized by, The utility model relates to a sewage treatment device, which comprises: sending sewage to be treated into the treatment bin (14), and the activated sludge in the treatment bin (14) starts to treat the sewage; and the treatment bin (14) slowly rotates during the treatment process. The index parameter of the processing chamber (14) is dynamically detected, and the volume of the processing chamber (14) is adjusted when the index parameter changes, so that the density of the activated sludge is increased, thereby maintaining the treatment speed of the sewage; After the sewage treatment is completed, the obtained reclaimed water is removed from the pool body (11); The sewage is continuously sent into the processing chamber (14) and the reclaimed water is continuously removed from the pool body (11).

Images