CN213895532U - Sewage treatment system combining magnetic coagulation separation and biological treatment - Google Patents
Sewage treatment system combining magnetic coagulation separation and biological treatment Download PDFInfo
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- CN213895532U CN213895532U CN202022520621.6U CN202022520621U CN213895532U CN 213895532 U CN213895532 U CN 213895532U CN 202022520621 U CN202022520621 U CN 202022520621U CN 213895532 U CN213895532 U CN 213895532U
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
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Abstract
The utility model discloses a sewage treatment system combining magnetic coagulation separation and biological treatment, which comprises a magnetic separation device, an adjusting tank and a biological filter tank; the water outlet end of the magnetic separation device is connected with the water inlet end of the regulating tank, the water outlet end of the regulating tank is connected with the water inlet end of the biological filter, and the regulating tank is used for regulating and controlling the flow of the magnetic separation device and the biological filter; the sewage is conveyed to a coagulation reaction device for coagulation reaction to form magnetic flocs, then conveyed to a magnetic separation device for adsorption separation of the magnetic flocs, conveyed to an adjusting tank, and conveyed to a biological filter after regulation and storage control of water quantity by the adjusting tank. The scheme can solve the problems that the treatment efficiency is influenced by high working frequency of the back flushing unit, the back flushing water consumption and the system energy consumption are increased, and the working stability of each treatment unit is poor due to the fact that each treatment unit is easily influenced by fluctuation of water quantity, water quality and the like.
Description
Technical Field
The utility model relates to the technical field of sewage, especially, relate to a sewage treatment system of separation and biological treatment combination is thoughtlessly congealed to magnetism.
Background
The magnetic coagulation separation technology is that magnetic powder is added in the traditional coagulation sedimentation process to be flocculated and combined with sewage in the sewage into a whole, and then the magnetic floc in the sewage is adsorbed and separated under the action of a magnetic field of an external magnetic separation system, so that the aim of purifying water is fulfilled.
With the application and development of the technology, in order to enable the magnetic coagulation separation system to carry out advanced treatment on sewage and remove nitrogen, phosphorus and soluble micro-pollutants in the sewage, a patent document with publication number "CN 106673373A" discloses a sustainable efficient sewage treatment system, which comprises a water inlet unit, a biological aerated filter unit, a coagulation reaction unit and a magnetic separation unit; the sewage of the water inlet unit is firstly subjected to denitrification and removal of soluble micro-pollutants by the biological aerated filter unit, then subjected to coagulation precipitation reaction by the coagulation reaction unit and then enters the magnetic separation unit for removal of phosphorus and treatment of soluble micro-pollutants, so that the sewage has a good removal effect on nitrogen, phosphorus and soluble organic matters in the water;
however, because the suspended sewage and phosphorus in the sewage are high in content, the biological aerated filter unit is easy to block, the working frequency of the backwashing unit is increased, the treatment efficiency is influenced, and the backwashing water consumption and the system energy consumption are increased; meanwhile, the water inlet unit, the biological aerated filter unit, the coagulation reaction unit and the magnetic separation unit are directly connected through a lift pump, and the stability of the work of a subsequent treatment unit is poor due to the influence of the fluctuation of water quantity, water quality and the like in the actual use process.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a sewage treatment system of separation and biological treatment combination is thoughtlessly congealed to magnetism to solve the recoil unit work frequency that present sewage treatment system exists in the in-service use process higher and influence the problem of treatment effeciency, increase back flush water consumption and system energy consumption, and receive the fluctuation influence of water yield each other, quality of water etc. and lead to the relatively poor problem of stability of each processing unit work between each processing unit easily.
In order to solve the above problem, the utility model adopts the following technical scheme:
the utility model discloses a sewage treatment system combining magnetic coagulation separation and biological treatment, which comprises a magnetic separation device, an adjusting tank and a biological filter tank; the water outlet end of the magnetic separation device is connected with the water inlet end of the adjusting tank, the water outlet end of the adjusting tank is connected with the water inlet end of the biological filter tank, and the adjusting tank is used for regulating and controlling the flow of the magnetic separation device and the flow of the biological filter tank.
Optionally, a delivery pump is arranged at the water outlet end of the adjusting tank, and the water outlet end of the adjusting tank is communicated with the water inlet end of the biological filter through the delivery pump, and is used for delivering the water in the adjusting tank to the biological filter.
Optionally, the biological filter comprises a denitrification filter and a nitrification filter; the water outlet end of the adjusting tank is connected with the water inlet end of the denitrification filter tank, and the water outlet end of the denitrification filter tank is connected with the water inlet end of the nitrification filter tank.
Optionally, the biological filter further comprises an aeration device and a backwashing device; the aeration device is connected with the nitrification filter and is used for supplying oxygen to the nitrification filter; the backwashing device is respectively connected with the denitrification filter tank and the nitrification filter tank and is used for backwashing filter materials in the denitrification filter tank and the nitrification filter tank; the denitrification filter tank and the nitrification filter tank are respectively provided with a flushing return pipe and are connected with the sewage tank through the flushing return pipes.
Optionally, the sewage treatment system further comprises a drainage tank, a drainage filter and a disinfection tank; the water outlet end of the nitrification filter tank is connected with the drainage tank, and the water outlet end of the drainage tank is connected with the disinfection tank through the drainage filter.
Optionally, the disinfection tank is an ultraviolet disinfection tank.
Optionally, the sewage treatment system further comprises a magnetic seed recovery device and a sludge tank; the discharge end of the magnetic separation device is connected with the feed end of the magnetic seed recovery device, the magnetic seed recovery end of the magnetic seed recovery device is connected with the coagulation reaction device through a magnetic seed feeding pump, and the sludge discharge end of the magnetic seed recovery device is connected with the sludge tank.
Optionally, the sewage treatment system further comprises a primary dewatering device and a secondary dewatering device; the sludge tank is connected with the feed end of the primary dehydration device through a sludge pump, and the discharge end of the first dehydration device is connected with the feed end of the secondary dehydration device; the primary dewatering device and the secondary dewatering device are respectively provided with a dewatering return pipe and are connected with the sewage tank through the dewatering return pipes.
Optionally, the sewage treatment system further comprises a flocculant dosing device; a sludge conditioning box is arranged between the primary dewatering device and the secondary dewatering device, and the discharge end of the primary dewatering device is connected with the feed end of the secondary dewatering device through the sludge conditioning box; and the flocculant dosing device is respectively connected with the primary dewatering device and the charging opening of the sludge conditioning box.
Optionally, the flocculant dosing device comprises a PAM dosing device and a PAC dosing device; the PAM dosing device is respectively connected with the primary dehydration device and the charging opening of the sludge conditioning box, and the PAC dosing device is connected with the charging opening of the sludge conditioning box.
The utility model discloses a technical scheme can reach following beneficial effect:
the utility model discloses a sewage treatment system which adjusts and improves the arrangement mode structure of the existing sewage treatment system; the sewage firstly enters a coagulation reaction device to react with a flocculating reagent and magnetic seeds to form magnetic flocs, and then the magnetic flocs are quickly separated by a magnetic separation device, so that organic matters (COD), Total Phosphorus (TP) and suspended matters (SS) can be removed, the concentration of the TP and the SS entering a biological filter is reduced, especially the SS can be controlled in a low concentration range, the biological filter is not easy to block, the backwashing frequency of the biological filter is effectively reduced, the working period of the biological filter is prolonged, and the aims of improving the treatment efficiency of the biological filter and reducing the energy consumption and the water consumption for backwashing of a system are fulfilled; meanwhile, the separated water treated by the magnetic separation device is conveyed to the regulating tank and is conveyed to the biological filter tank after the regulation and storage control of the water amount is carried out by the regulating tank, so that compared with a mode of directly connecting the magnetic separation device with the biological filter tank, the influence of the flow fluctuation of the magnetic separation device and the biological filter tank on the treatment effect of each other can be prevented, and the stability of the sewage purification treatment effect of the magnetic separation device and the biological filter tank is favorably ensured.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
FIG. 1 is a schematic structural view of a sewage treatment system disclosed in an embodiment of the present invention;
description of reference numerals:
1-sewage tank, 2-sewage pump, 3-coarse grating, 4-rotational flow sand setting tank, 5-rotary drum fine grating, 6-coagulation reaction device, 7-magnetic separation device, 8-regulating tank, 9-delivery pump, 10-denitrification filter tank, 11-nitrification filter tank, 12-drainage tank, 13-drainage filter, 14-disinfection tank, 15-flushing backflow pipe, 21-PAM dosing device, 22-PAM dosing pump, 23-PAC dosing device, 24-PAC dosing pump, 25-magnetic seed dosing pump, 26-magnetic seed recovery device, 27-backwashing pump, 28-aeration fan, 29-backwashing fan, 30-sludge tank, 31-sludge pump, 32-primary dewatering device, 33-sludge conditioning box, 34-a secondary dewatering device, 35-a screw conveyor and 36-a mud storage hopper.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention discloses a sewage treatment system combining magnetic coagulation separation and biological treatment, wherein the disclosed sewage treatment system includes a magnetic separation device 7, a regulating tank 8 and a biological filter; the water outlet end of the magnetic separation device 7 is connected with the water inlet end of the adjusting tank 8, the water outlet end of the adjusting tank 8 is connected with the water inlet end of the biological filter, and the adjusting tank 8 is used for regulating and controlling the flow of the magnetic separation device 7 and the flow of the biological filter.
Sewage firstly enters a coagulation reaction device 6 to react with a flocculating agent and magnetic seeds to form magnetic flocs, and then the magnetic flocs are quickly separated by a magnetic separation device 7, so that organic matters (COD), Total Phosphorus (TP) and suspended matters (SS) can be removed, the concentration of the TP and the SS entering a biological filter is reduced, especially the SS can be controlled in a low concentration range, the biological filter is not easy to block, the backwashing frequency of the biological filter is effectively reduced, and the working period of the biological filter is prolonged; therefore, compared with the existing sewage treatment system, the biological filter treatment efficiency can be improved, the system energy consumption and the backwashing water consumption can be reduced, and the purposes of energy conservation and water conservation are achieved.
Meanwhile, the separated water treated by the magnetic separation device 7 is conveyed to the regulating tank 8, and is conveyed to the biological filter tank after the regulation and storage control of the water amount is performed through the regulating tank 8, so that compared with a mode of directly connecting the magnetic separation device 7 with the biological filter tank, the influence of the flow fluctuation of the magnetic separation device 7 and the biological filter tank on the treatment effect of each other can be prevented, and the stability of the sewage purification treatment effect of the magnetic separation device 7 and the biological filter tank is favorably ensured.
In order to provide conveying power for conveying the sewage in the regulating tank 8 into the biological filter, a conveying pump 9 can be arranged at the water outlet end of the regulating tank 8, and the water outlet end of the regulating tank 8 is communicated with the water inlet end of the biological filter through the conveying pump 9 and is used for conveying the water in the regulating tank 8 into the biological filter, so that not only is the conveying power provided by the conveying pump 9, but also the flow rate of conveying the sewage into the biological filter can be regulated and controlled through the conveying pump 9 so as to meet the treatment requirement of the biological filter.
As the arrangement structure of the biological filter, as shown in fig. 1, the biological filter may include a denitrification filter 10 and a nitrification filter; the water outlet end of the regulating tank 8 is connected with the water inlet end of the denitrification filter 10, and the water outlet end of the denitrification filter 10 is connected with the water inlet end of the nitrification filter 11, so that sewage entering the biological filter is treated by the denitrification filter 10 and then treated by the nitrification filter 11.
Because the denitrifying bacteria are heterotrophic bacteria and the nitrifying bacteria are autotrophic bacteria, the more carbon sources in the water are, the more the denitrifying bacteria are beneficial to growth, and the less the nitrifying bacteria are beneficial to growth; therefore, the denitrification filter 10 is arranged in front of the nitrification filter 11, so that the denitrification bacteria can utilize the carbon source in the consumed sewage, not only can remove organic matters, but also can reduce the carbon source and provide alkalinity for the nitrification process in the denitrification process, and further the subsequent nitrification process is facilitated, and the treatment effects of the denitrification filter 10 and the nitrification filter 11 are fully exerted.
It is easily understood that the sewage treatment system may further include a drain tank 12, a drain filter 13, and a sterilizing tank 14; the water outlet end of the nitrification filter 11 is connected with a water drainage tank 12, and the water outlet end of the water drainage tank 12 is connected with a disinfection tank 14 through a water drainage filter 13, so that the water treated by the nitrification filter 11 can be drained into the water drainage tank 12, and then the water in the water drainage tank 12 is drained after being treated by the water drainage filter 13 and the disinfection tank 14 in sequence; thereby can play the regulation effect through drainage tank 12 to carry out advanced treatment, disinfect the drainage through disinfection pond 14 to the suspended solid of aquatic through drainage filter 13, and then make out water discharge up to standard outer arranging.
Preferably, the disinfection tank 14 is an ultraviolet disinfection tank, so that the discharged water can be disinfected by physical means, and the content of chemical agents in the discharged water can be effectively reduced compared with the method of chemical disinfection by adding disinfectants and the like; the drain filter 13 may be a fiber rotary disc filter.
The biological filter disclosed by the embodiment of the utility model also can comprise an aeration device and a back washing device; the aeration device is connected with the nitrification filter 11 and is used for supplying oxygen to the nitrification filter 11; the back flushing device is respectively connected with the denitrification filter 10 and the nitrification filter 11 and is used for back flushing of filter materials in the denitrification filter 10 and the nitrification filter 11 to prevent the denitrification filter 10 and the nitrification filter 11 from being blocked, thereby being beneficial to keeping the filtering effects of the denitrification filter 10 and the nitrification filter 11.
Meanwhile, the denitrification filter 10 and the nitrification filter 11 are respectively provided with a flushing return pipe 15 and are connected with the sewage tank 1 through the flushing return pipes 15, so that the backwashing water after the reverse flushing can be returned to the sewage tank 1 through the flushing return pipes 15 for recycling treatment, the pollution is prevented, and the water treatment and purification effect of the system is ensured.
Wherein the backwashing means may comprise a backwashing pump 27; the denitrification filter 10 and the nitrification filter 11 are respectively connected with the drainage tank 12 through the corresponding backwashing pump 27, so that the backwashing pump 27 can utilize the water in the drainage tank 12 to perform backwashing operation on the corresponding denitrification filter 10 and nitrification filter 11, and the purpose of saving water can be better achieved.
Preferably, the denitrification filter 10 is also connected with a backwashing fan 29, and the aeration device is an aeration fan 28; the aeration fan 28 and the backwashing fan 29 can be started in the process that the backwashing pump 27 backwashes the corresponding denitrification filter 10 and the nitrification filter 11, so that the shearing force of the surface of the filter material is increased by adding compressed air, and dirt which is not easy to peel off in water washing is peeled off under the shearing force of the rising steam pocket, thereby improving the backwashing effect.
The sewage treatment system disclosed by the embodiment of the utility model also comprises a magnetic seed recovery device 26 and a sludge tank 30; the discharge end of the magnetic separation device 7 is connected with the feed end of a magnetic seed recovery device 26, the magnetic seed recovery end of the magnetic seed recovery device 26 is connected with the coagulation reaction device 6 through a magnetic seed feeding pump 25, and the sludge discharge end of the magnetic seed recovery device 26 is connected with a sludge tank 30; therefore, the magnetic seeds and the sludge can be separated from the magnetic flocs adsorbed and fished by the magnetic separation device 7 through the magnetic seed recovery device 26, and the separated magnetic seeds are added into the coagulation reaction device 6 again through the magnetic seed adding pump 25, so that the recovery and cyclic utilization of the magnetic seeds such as magnetic powder and the like are realized; the remaining sludge is then transferred to the sludge tank 30.
Wherein, the sewage treatment system also comprises a primary dewatering device 32 and a secondary dewatering device 34; the sludge tank 30 is connected with the feed end of a primary dewatering device 32 through a sludge pump 31, and the discharge end of a first dewatering device is connected with the feed end of a secondary dewatering device 34; the primary dewatering device 32 and the secondary dewatering device 34 are respectively provided with a dewatering return pipe and are connected with the sewage tank 1 through the dewatering return pipes.
The sludge can be dehydrated through the primary dehydration device 32 and the secondary dehydration device 34, so that the water content of the sludge meets the requirement; meanwhile, compared with the method that the sludge is directly dehydrated to the required moisture content through one dehydration device, the acting force of each level can be respectively controlled through the graded dehydration of the first-level dehydration device 32 and the second-level dehydration device 34, so that the purpose of energy saving can be achieved, and the sludge with different moisture contents can be unloaded and separated according to the requirement.
Specifically, the primary dewatering device 32 and the secondary dewatering device 34 are provided with discharge openings, respectively, so that the sludge can be discharged into the corresponding sludge storage hopper 36 through the corresponding discharge openings; the primary dewatering device 32 can be a stacked screw dewatering machine and can dewater sludge to the water content of 80-85%; second grade dewatering device 34 can be the sheet frame hydroextractor to can be less than 60% with sludge dewatering to the moisture content, and second grade dewatering device 34's discharge opening is provided with screw conveyer 35, thereby can conveniently carry the sludge of second grade dewatering device 34 dehydration to corresponding mud bucket 36 that stores in through screw conveyer 35.
In order to make the sludge in the water settle out more quickly, the sewage treatment system of the scheme also comprises a flocculant dosing device; a sludge conditioning box 33 is arranged between the primary dewatering device 32 and the secondary dewatering device 34, and the discharge end of the primary dewatering device 32 is connected with the feed end of the secondary dewatering device 34 through the sludge conditioning box 33; the flocculant dosing device is respectively connected with the charging openings of the primary dewatering device 32 and the sludge conditioning box 33, so that the sludge in the primary dewatering device 32 and the secondary dewatering device 34 is easier to precipitate and separate, and the dewatering treatment effect is improved.
Specifically, the flocculant dosing device may include a PAM (polyacrylamide) dosing device and a PAC (polyaluminium chloride) dosing device; the PAM dosing device 21 is respectively connected with the feed inlets of the primary dehydration device 32 and the sludge conditioning box 33 through a PAM dosing pump 22, and the PAC dosing device 23 is connected with the feed inlet of the sludge conditioning box 33 through a PAC dosing pump 24; therefore, the sludge in the first-stage filtering device can be rapidly precipitated with water under the action of PAC, and the sludge in the second-stage filtering device can be rapidly precipitated with water under the action of PAC and PAM.
Because the water content of the sludge dehydrated by the primary dehydration device is required to be 80-85%, the requirement on the water content of the desliming is not high, and the sludge still keeps certain fluidity and is convenient to convey to the secondary dehydration device, the requirement can be met only by adding PAM; in the process of dehydration of the secondary dehydration device, the water content of the sludge needs to be less than 60 percent, so that PAM and PAC are added to better ensure the dehydration effect of the sludge, and especially, the PAC can break the wall of microorganisms in the sludge, so that cell water in the microorganisms is dehydrated, and the water content of the sludge is further reduced; preferably, the PAM is of the cationic type; because the sludge colloid is generally negatively charged, the cationic PAM can play a role in destabilization.
Meanwhile, the PAM dosing device 21 may be connected to the coagulation reaction device 6 through a corresponding PAM dosing pump 22, and the PAC dosing device 23 may be connected to the coagulation reaction device 6 through a corresponding PAC dosing pump 24, so that PAM and PAC may be added to the coagulation reaction device 6 to perform a coagulation reaction.
The sewage treatment system disclosed by the embodiment of the utility model can also comprise a sewage tank 1 for storing sewage to be treated; a sewage pump 2 can be arranged in the sewage pool 1 and used for conveying sewage to be treated in the sewage pool 1 to the coagulation reaction device 6.
Meanwhile, a sewage filtering device can be arranged between the sewage pool 1 and the coagulation reaction device 6, and impurities in the sewage are filtered by the sewage filtering device, so that the influence of the impurities on the subsequent treatment process is prevented; specifically, the sewage filtering apparatus may include a coarse screen 3, a cyclone sand settling tank 4, and a rotating drum fine screen 5, so that large-sized suspended substances may be removed through the coarse screen 3, sand particles in water to be treated may be rapidly precipitated and separated through the cyclone sand settling tank 4, and smaller floating substances in the water may be removed through the rotating drum fine screen 5.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A sewage treatment system combining magnetic coagulation separation and biological treatment is characterized by comprising a magnetic separation device, a regulating tank and a biological filter tank; the water outlet end of the magnetic separation device is connected with the water inlet end of the adjusting tank, the water outlet end of the adjusting tank is connected with the water inlet end of the biological filter tank, and the adjusting tank is used for regulating and controlling the flow of the magnetic separation device and the flow of the biological filter tank.
2. The sewage treatment system of claim 1, wherein the water outlet end of the regulating tank is provided with a delivery pump, and the water outlet end of the regulating tank is communicated with the water inlet end of the biological filter through the delivery pump for delivering the water in the regulating tank to the biological filter.
3. The wastewater treatment system according to claim 1 or 2, wherein the biological filter comprises a denitrification filter and a nitrification filter; the water outlet end of the adjusting tank is connected with the water inlet end of the denitrification filter tank, and the water outlet end of the denitrification filter tank is connected with the water inlet end of the nitrification filter tank.
4. The wastewater treatment system according to claim 3, wherein the biological filter further comprises an aeration device and a backwashing device; the aeration device is connected with the nitrification filter and is used for supplying oxygen to the nitrification filter; the backwashing device is respectively connected with the denitrification filter tank and the nitrification filter tank and is used for backwashing filter materials in the denitrification filter tank and the nitrification filter tank; the denitrification filter tank and the nitrification filter tank are respectively provided with a flushing return pipe and are connected with the sewage tank through the flushing return pipes.
5. The wastewater treatment system of claim 4, further comprising a drain basin, a drain filter, and a disinfection basin; the water outlet end of the nitrification filter tank is connected with the drainage tank, and the water outlet end of the drainage tank is connected with the disinfection tank through the drainage filter.
6. The wastewater treatment system of claim 5, wherein the disinfection tank is an ultraviolet disinfection tank.
7. The wastewater treatment system according to claim 1 or 2, further comprising a magnetic seed recovery device and a sludge tank; the discharge end of the magnetic separation device is connected with the feed end of the magnetic seed recovery device, the magnetic seed recovery end of the magnetic seed recovery device is connected with the coagulation reaction device through a magnetic seed feeding pump, and the sludge discharge end of the magnetic seed recovery device is connected with the sludge tank.
8. The wastewater treatment system of claim 7, further comprising a primary dewatering device and a secondary dewatering device; the sludge tank is connected with the feed end of the primary dewatering device through a sludge pump, and the discharge end of the primary dewatering device is connected with the feed end of the secondary dewatering device; the primary dewatering device and the secondary dewatering device are respectively provided with a dewatering return pipe and are connected with the sewage tank through the dewatering return pipes.
9. The wastewater treatment system of claim 8, further comprising a flocculant dosing apparatus; a sludge conditioning box is arranged between the primary dewatering device and the secondary dewatering device, and the discharge end of the primary dewatering device is connected with the feed end of the secondary dewatering device through the sludge conditioning box; and the flocculant dosing device is respectively connected with the primary dewatering device and the charging opening of the sludge conditioning box.
10. The wastewater treatment system of claim 9, wherein the flocculant dosing device comprises a PAM dosing device and a PAC dosing device; the PAM dosing device is respectively connected with the primary dehydration device and the charging opening of the sludge conditioning box, and the PAC dosing device is connected with the charging opening of the sludge conditioning box.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022520621.6U CN213895532U (en) | 2020-11-04 | 2020-11-04 | Sewage treatment system combining magnetic coagulation separation and biological treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022520621.6U CN213895532U (en) | 2020-11-04 | 2020-11-04 | Sewage treatment system combining magnetic coagulation separation and biological treatment |
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| CN213895532U true CN213895532U (en) | 2021-08-06 |
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