CN213357235U - Sewage treatment system - Google Patents
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- CN213357235U CN213357235U CN202021391697.7U CN202021391697U CN213357235U CN 213357235 U CN213357235 U CN 213357235U CN 202021391697 U CN202021391697 U CN 202021391697U CN 213357235 U CN213357235 U CN 213357235U
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Abstract
The utility model relates to a sewage treatment system, including a plurality of processing lines, a serial communication port, processing line is including the pretreatment unit, first headstock gear and the biochemical treatment unit that communicate in proper order, the intercommunication has the second headstock gear between pretreatment unit and the first headstock gear, and the delivery port intercommunication that the second opened and close the structure has the regulation pond, the delivery port intercommunication in regulation pond has third headstock gear, third headstock gear's delivery port and pretreatment unit intercommunication. The utility model discloses a sewage treatment system shock resistance is strong, is difficult to because of unusual intaking and stopping production, subtract the production.
Description
Technical Field
The utility model relates to a sewage treatment system belongs to the water treatment field.
Background
The source of municipal sewage generally divides into two parts: first, domestic sewage of residents and second, industrial wastewater.
Domestic sewage of residents: low toxicity, low pollutant content and wide source dispersion.
Industrial wastewater: high toxicity, high pollutant content, centralized source distribution, especially for large sewage households.
The abnormal discharge of the industrial wastewater causes serious impact on urban sewage treatment plants and influences the normal operation of sewage treatment equipment. Along with the gradual development of cities and towns, a domestic sewage pipe network collection system covers all industrial areas and urban living areas, and along with the continuous improvement of the construction of the urban pipe network in recent years, the inlet water of a sewage plant pipe network is often influenced by the impact of the quality of industrial sewage water, such as acid-base, total phosphorus, oil stain, high nitrogen, heavy metal ions, sulfides, nitrides and the like. The pollutants are discharged to the sewage plant through a pipe network, so that serious impact is brought to the biochemical section and normal production of the sewage plant, and even the sewage plant is forced to reduce production and stop production. Once a sewage plant is affected, the time required for recovering normal operation is different from days to months, so that the sewage directly overflows into rivers and other serious problems are caused.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model aims to provide a sewage treatment system that shock resistance is strong.
In order to solve the technical problem, the technical scheme of the utility model as follows:
the utility model provides a sewage treatment system, includes a plurality of processing lines, the processing line is including the preprocessing unit, first opening and closing mechanism and the biochemical treatment unit that communicate in proper order, the intercommunication has second opening and closing mechanism between preprocessing unit and the first opening and closing mechanism, and the delivery port intercommunication that the structure was opened and close to the second has the regulation pond, the delivery port intercommunication in regulation pond has third opening and closing mechanism, and the delivery port and the preprocessing unit intercommunication of third opening and closing mechanism.
Therefore, when abnormal water inflow occurs during the operation of the sewage treatment system, the first opening and closing mechanism can be closed, and the second opening and closing mechanism can be opened, so that abnormal water inflow enters the storage tank. For accidental abnormal inflow water with low toxicity, after the sewage treatment system normally enters water, the water can flow back to the first grating groove in a small flow and be mixed with the normal inflow water of the sewage treatment system, and then the mixture enters a normal treatment process, so that the impact on a biochemical treatment unit of the sewage treatment system is reduced; for abnormal water inflow with normal state or large toxicity, the water quality needs to be regulated in a regulating storage tank or a matched physicochemical unit, for example, dosing and dephosphorization, acid-base neutralization, coagulating sedimentation, sand setting, oil removal and ozone oxidation treatment can be carried out according to the needs, the sewage after the conditioning flows back to a pretreatment unit and enters a normal treatment process, the overload sewage is prevented from directly entering a biochemical unit, the normal operation of a sewage treatment system is ensured, and the impact resistance is improved.
Further, the top of regulation pond is equipped with the materialization unit, the materialization unit is equipped with the immersible pump including flocculation basin and the sedimentation tank that communicates in proper order in the regulation pond, the delivery port and the flocculation basin intercommunication of immersible pump, the delivery port and the pretreatment unit intercommunication of sedimentation tank. Therefore, the sewage in the storage tank can be flocculated and settled according to the requirement, the content of pollutants (such as SS, COD, TP and the like) in the sewage is reduced, and the treatment burden of subsequent functional units is reduced while the water quality is improved.
Further, the regulation pond includes the cell body, the interior bottom of cell body has the recess, the immersible pump sets up in the recess, and the clearance in regulation pond can be conveniently made things convenient for to the setting of recess, sets up the immersible pump and can conveniently go into to the materialization unit with sediments such as silt in the regulation pond in the recess.
Optionally, the flocculation basin and the sedimentation basin are integrally arranged. The sedimentation tank is an inclined plate sedimentation tank.
Furthermore, an intelligent ejector is arranged at the inner bottom of the storage tank, so that the storage tank can be flushed when being emptied, stirring and aeration can be performed, precipitation is prevented, and odor is relieved; the bottom point-to-point flushing can be realized; the arrangement is flexible and is not restricted by the pool type.
Optionally, the intelligent ejector is a hydraulic ejection system composed of a water pump, a mixing ejector and a fixed rotary support, and the stored water and the pool bottom are stirred and washed by using a gas-liquid mixture.
Optionally, the capacity of the storage tank is 2-4h of the inlet water volume of the sewage treatment system.
The time period of the abnormal water inlet condition of the sewage treatment system is generally short, and is usually within 2-4 hours, so that a regulation and storage tank with proper capacity can be arranged, and the equipment investment is reduced as much as possible while the regulation and storage requirements are met; the system can be matched with environmental protection law enforcement, and can trace the sewage discharge source in the time period by environmental protection law enforcement departments by combining sewage monitoring equipment to determine illegal sewage disposal units.
Furthermore, the pretreatment unit comprises a first grid groove, a lifting mechanism, a second grid groove and a grit chamber which are sequentially communicated, and a water outlet of the grit chamber is communicated with the first opening and closing mechanism; the first grid groove and the second grid groove are respectively provided with a grid, and the size of the holes of the grids in the first grid groove is larger than that of the holes of the grids in the second grid groove. Through multi-stage filtration, sedimentation separation, can be so that big or small debris and sand etc. in the sewage are got rid of, prevent that sewage treatment system pipeline from blockking up, guarantee the normal operating of system, also can reduce follow-up biochemical unit treatment burden.
Further, the position of the bottom of the regulation pond is higher than the position of the first grid groove, the effective height of the liquid level of the regulation pond is lower than the effluent liquid level of the grit chamber, so that the sewage after tempering in the regulation pond can flow into the first grid groove, and the sewage is lifted to the regulation pond by utilizing the original lifting pump of a sewage plant. The number of lifting mechanisms is reduced.
Optionally, the number of the processing lines is more than 2, and further 2 to 10.
Further, the device also comprises a main pipe, wherein the outlet of the main pipe is connected with a first processing line and a second processing line; the first treatment line comprises a pretreatment unit A, a first opening and closing mechanism A and a biochemical treatment unit A which are sequentially communicated, a second opening and closing mechanism A is communicated between the pretreatment unit A and the first opening and closing mechanism A, and a water outlet of the second opening and closing mechanism A is communicated with the regulation and storage tank; the second treatment line comprises a pretreatment unit B, a first opening and closing mechanism B and a biochemical treatment unit B which are sequentially communicated, a second opening and closing mechanism B is communicated between the pretreatment unit B and the first opening and closing mechanism B, and a water outlet of the second opening and closing mechanism B is communicated with the storage tank.
Furthermore, a first monitoring mechanism for monitoring the water quality is arranged on the main pipe.
The monitoring mechanism can adopt the existing water quality monitoring equipment.
Further, a water outlet of the third opening and closing mechanism is connected with a fourth opening and closing mechanism A and a fourth opening and closing mechanism B in parallel, a water outlet of the fourth opening and closing mechanism A is communicated with the pretreatment unit A, and a water outlet of the fourth opening and closing mechanism B is communicated with the pretreatment unit B.
A sewage treatment method comprises the following steps:
starting the first opening and closing mechanism, closing the second opening and closing mechanism and the third opening and closing mechanism, and feeding water to perform sewage treatment; meanwhile, the water quality of water entering the pretreatment unit is monitored in real time, when the water quality is abnormal, the first opening and closing mechanism is closed or adjusted, and the second opening and closing mechanism is opened, so that the sewage at the stage flows into the storage tank; then, according to the abnormal condition of the sewage at the stage, carrying out conditioning treatment on the sewage in the storage tank; after the water quality of the water entering the pretreatment unit is normal, starting the first opening and closing mechanism, closing the second opening and closing mechanism, and returning the sewage in the storage tank to the pretreatment unit;
wherein the water quality monitoring index comprises one or more of PH value, COD, TP, chromaticness, SS, BOD and heavy metal content.
Optionally, a neutralizing agent is used for adjusting the pH value of the acidic wastewater, the neutralizing agent can be lime, limestone, dolomite, sodium hydroxide, sodium carbonate and the like, and sulfuric acid and hydrochloric acid are generally used for adjusting the pH value of the alkaline wastewater. When neutralization treatment is needed, the dosage of the medicament to be added can be calculated according to the pH value of the inlet water quality obtained by monitoring and analysis, so that the aim of adjusting the pH value is fulfilled.
Compared with the prior art, the beneficial effects of the utility model are as follows:
(1) the utility model discloses a sewage treatment system shock resistance is strong, is difficult to because of unusual intaking and stopping production, subtract the production.
(2) The regulation and storage tank can receive short-time burst or sudden abnormal water coming from the pipe network, impact is effectively buffered, and the risk resistance of the sewage treatment system is improved. In addition, the regulation and storage pool has the following functions through reasonable scheduling:
firstly, regulating the abnormal water quality and water quantity of a short-time burst or sudden pipe network;
secondly, matching with a maintenance plan of facilities and equipment in the system, water comes from an emergency regulation and storage pipe network, for example, when a biochemical unit needs to be maintained, a pretreatment unit can work normally, and pretreated sewage is introduced into a regulation and storage tank;
emergency storage of sewage from special area pollution event;
fourthly, backflow storage and circular treatment are carried out on the discharged water which accidentally does not reach the standard in the sewage treatment system;
the water is used as a storage pool of reuse water for ecological water supplement and reuse;
solving the problems of initial rain and the like.
(3) After the abnormal inlet water is regulated and treated, the design standard of the inlet water quality of the sewage treatment system is met, and the normal operation of the sewage treatment system is not influenced.
(4) The sewage treated in the storage tank can automatically flow into the pretreatment unit without additionally arranging a lifting mechanism, so that the equipment investment cost and the operation cost can be reduced.
Drawings
FIG. 1 is a schematic view of a sewage treatment system according to the present invention.
FIG. 2 is a schematic view of another sewage treatment system according to the present invention.
Fig. 3 is a schematic structural diagram of a regulation and storage tank of the present invention.
In the figure, 1-a first grid groove, 1-1-a first grid groove A, 1-2-a first grid groove B, 2-1-a lifting mechanism A, 2-2-a lifting mechanism B, 3-1-a second grid groove A, 3-2-a second grid groove B, 4-1-a grit chamber A, 4-2-a grit chamber B, 5-1-a biochemical unit A, 5-2-a biochemical unit B, 6-a storage tank, 6-1-a submersible pump, 6-2-an intelligent injector, 7-1-a second opening and closing mechanism A, 7-2-a second opening and closing mechanism B, 8-a third opening and closing mechanism, 9-1-a fourth opening and closing mechanism A, 9-2-a fourth opening and closing mechanism B, 10-1-a first opening and closing mechanism A, 10-2-a first opening and closing mechanism B, 11-a trunk pipe, 12-a first monitoring mechanism, 13-a medicine adding unit, 14-a materialization unit and 15-a second monitoring mechanism.
Detailed Description
The following description describes alternative embodiments of the present invention to teach one of ordinary skill in the art how to make and use the invention. For the purpose of teaching the present invention, some conventional aspects have been simplified or omitted. Those skilled in the art will appreciate that variations or substitutions from these embodiments will fall within the scope of the invention.
Example 1
Referring to fig. 1, a sewage treatment system, includes the trunk pipe, be provided with the first monitoring mechanism that is used for monitoring quality of water on the trunk pipe, the monitoring index of quality of water includes pH value, COD, TP, chromaticness, SS, BOD, heavy metal content. The outlet of the main pipe is connected with a first processing line and a second processing line in parallel, the processing line comprises a pretreatment unit, a first opening and closing mechanism and a biochemical processing unit which are sequentially communicated, a second opening and closing mechanism is communicated between the pretreatment unit and the first opening and closing mechanism, the water outlet of the second opening and closing mechanism is communicated with a regulation pool, the water outlet of the regulation pool is communicated with a third opening and closing mechanism, and the water outlet of the third opening and closing mechanism is communicated with the pretreatment unit.
The first treatment line comprises a pretreatment unit A, a first opening and closing mechanism A and a biochemical treatment unit A which are sequentially communicated, a second opening and closing mechanism A is communicated between the pretreatment unit A and the first opening and closing mechanism A, and a water outlet of the second opening and closing mechanism A is communicated with the regulation and storage tank; the second treatment line comprises a pretreatment unit B, a first opening and closing mechanism B and a biochemical treatment unit B which are sequentially communicated, a second opening and closing mechanism B is communicated between the pretreatment unit B and the first opening and closing mechanism B, and a water outlet of the second opening and closing mechanism B is communicated with the storage tank. The water outlet of the third opening and closing mechanism is connected with a fourth opening and closing mechanism A and a fourth opening and closing mechanism B in parallel, the water outlet of the fourth opening and closing mechanism A is communicated with the pretreatment unit A, and the water outlet of the fourth opening and closing mechanism B is communicated with the pretreatment unit B.
The pretreatment unit comprises a first grid groove, a lifting mechanism, a second grid groove and a grit chamber which are sequentially communicated, and a water outlet of the grit chamber is communicated with a first opening and closing mechanism; the first grid groove and the second grid groove are respectively provided with a grid, and the size of the holes of the grids in the first grid groove is larger than that of the holes of the grids in the second grid groove. The position of the regulating storage pool is higher than that of the first grid groove.
The regulation pond includes the cell body, the inner bottom side of cell body has the recess, the immersible pump sets up in the recess. The interior bottom in regulation pond is equipped with intelligent sprayer, and intelligent sprayer is located the recess offside.
Each opening and closing mechanism is a gate valve. The lifting mechanism includes a lift pump.
The regulation and storage tank can be divided into five modes of idle, water inlet, water storage, emptying and flushing:
firstly, idling: when the incoming water concentration and the incoming water flow of the sewage treatment system meet the water inlet requirement, water enters normally, and the storage tank is in an idle stage.
Feeding water: when the incoming water concentration or flow of the sewage treatment system does not meet the designed water inlet requirement, the water inlet load or the water inlet load is delayed to be reduced according to the actual condition, and the water enters the regulating and storing tank.
Thirdly, water storage: after the regulation pool is full, the intelligent injector is opened at intervals to stir and aerate the sewage in the pool. And for the incoming water with abnormal pH, adding a pH regulator into the regulation and storage tank, and mixing and regulating by virtue of a stirrer.
And fourthly, emptying: when the incoming water concentration and flow of the sewage treatment system are smaller than the designed water inlet requirement of the sewage treatment system, the valve is opened, the sewage in the pool is discharged into the water collecting well in a small dosage, and the sewage and the incoming water are fully mixed to reach the water inlet standard of the sewage treatment system and then enter the sewage treatment system for treatment. If parameters such as TP and the like of the incoming water of the sewage treatment system can not meet the water inlet concentration standard of the sewage treatment system under most conditions, the water can be reduced to meet the water inlet requirement of the sewage treatment system by arranging the materialization unit and then enters the sewage treatment system for treatment.
Flushing: when the liquid level of the storage tank is reduced to a certain height, the intelligent injector is opened to flush the sediment at the bottom of the storage tank, and the flushing water is discharged into the water collecting well.
When the first monitoring mechanism feeds back the sewage quality to meet the water inlet requirement of the sewage treatment plant, the second opening and closing mechanism is closed, the first opening and closing mechanism is opened, the intelligent injector is opened if the water quantity is stored in the regulating reservoir, the water stored in the regulating reservoir is mixed and aerated, the third opening and closing mechanism and the fourth opening and closing mechanism are opened, the sewage is controlled to automatically flow and empty to the front end of the first grid groove, and the mixed water is treated according to the original technological process of the sewage treatment system.
When the first monitoring mechanism feeds back that the quality of inlet water of the sewage treatment plant is abnormal, the first opening and closing mechanism is completely/partially closed according to the abnormal index condition, the second opening and closing mechanism is opened (closed when the regulation pool is fully loaded), the third opening and closing mechanism and the fourth opening and closing mechanism are closed, sewage is lifted to the grit chamber through the lifting mechanism, the sewage is connected into the regulation pool at the tail end of the grit chamber for temporary storage, and the intelligent injector is opened at regular time in the regulation pool for stirring and aeration.
When the feedback water inlet index of the first monitoring mechanism reaches the standard and the water quantity and concentration of the incoming water are lower, the first opening and closing mechanism is fully opened, the second opening and closing mechanism is closed, the water stored in the intelligent injector mixed aeration tank is opened, the third opening and closing mechanism and the fourth opening and closing mechanism are opened to control the flow to automatically flow and empty to the front end of the first grating tank, and the mixed incoming water is treated according to the original process flow of the sewage treatment system. When the liquid level of the regulation pool drops to a certain height, the intelligent injector is opened to flush the bottom of the pool, and the flushing water is automatically discharged to the front end of the first grid groove to realize the empty pool of the regulation pool.
Further, when using the utility model discloses a sewage treatment system, can survey earlier and gather the unusual sewage condition that the application land took place during nearly 2~5 years, characteristics and the influence of unusual sewage are summarized in the analysis. And determining design parameters, construction scale and the like of the treatment system by combining the investigation result.
Example 2
Referring to fig. 2 and 3, example 1 is repeated with the difference that: the top of regulation pond is equipped with the materialization unit, the materialization unit is equipped with the immersible pump including flocculation basin and the sedimentation tank that communicates in proper order in the regulation pond, the delivery port and the flocculation basin intercommunication of immersible pump, the delivery port of sedimentation tank communicates between third operating mechanism and fourth operating mechanism. The device also comprises a second monitoring mechanism for detecting the quality of the water discharged from the materialization unit and the sewage in the storage tank so as to monitor the hardening and tempering conditions.
When flocculation is needed, PAC (polyaluminium chloride) can be added into the flocculation tank to reduce the concentration of TP in the stored sewage, and the method is also suitable for removing heavy metal ions such as chromaticness, SS, COD, BOD, arsenic, mercury and the like in the sewage. Furthermore, a submersible stirrer can be arranged in the flocculation tank, and the flocculation effect is further strengthened through the stirring effect of the submersible stirrer. PAM (polyacrylamide) has wide application range, has certain removal effect on pollutants in sewage, and in addition, PAM is matched with PAC to play a coagulation aiding effect, so that alum floc formed by PAC can be agglomerated to be beneficial to precipitation, and therefore, the preferred method is to add PAC first and then add PAM.
Generally, the time required for sewage to flow from the tail end of a main pipe to the tail end of a grit chamber is 15-40 min (the specific time can be calculated according to the size of a pretreatment unit of a sewage treatment system), and because the delay time of about 20-30min exists in the online monitoring of pollutants such as COD (chemical oxygen demand), TP (thermal treatment process) and the like, the first monitoring mechanism can be arranged on the main pipe for the time to prolong the emergency reaction time of the storage tank and avoid abnormal inflow from directly entering a biochemical treatment unit.
For the frequently occurring TP, COD and other water with low toxicity and over standard, part of the water enters a regulation and storage tank by intercepting, and the other part of the water still enters a back-end biochemical unit for treatment. When the volume of the regulation pool is 2-4 hours of water inlet amount, the effective regulation time can be prolonged to about 4-8 hours by the mode.
When the first monitoring mechanism feeds back the sewage quality to meet the water inlet requirement of the sewage treatment system, the second opening and closing mechanism is normally closed, the first opening and closing mechanism is normally open, if the water quantity in the storage tank is reserved, the intelligent injector is opened to carry out mixed aeration, the third opening and closing mechanism and the fourth opening and closing mechanism are opened to control the flow to automatically flow and empty to the front end of the first grating groove, and after mixed water inlet, operation treatment is carried out according to the original process flow of the sewage treatment system.
When the first monitoring mechanism feeds back that the quality of inlet water of the sewage treatment system is abnormal, the first opening and closing mechanism is completely/partially closed according to abnormal index conditions, the second opening and closing mechanism is opened (the second opening and closing mechanism is closed when the regulation and storage tank is fully loaded), the gate valves of the third opening and closing mechanism and the fourth opening and closing mechanism are closed, sewage is lifted to the grit chamber through the lifting mechanism, the sewage is connected into the regulation and storage tank at the tail end of the grit chamber for temporary storage, and the intelligent injector in the regulation and storage tank is opened at regular time for stirring and aeration.
After the regulation and storage tank is full, when the water quality index fed back by the first monitoring mechanism is still high and exceeds the treatment capacity of a sewage plant, a PH regulator can be directly added into the regulation and storage tank due to PH abnormity, and an intelligent ejector in the regulation and storage tank is started to carry out mixing reaction; wherein TP, COD or the unusual intaking of unknown reason will store sewage and promote to the materialization unit through the immersible pump, handle sewage, the sewage backward flow to first grid groove after the processing is accomplished.
When the liquid level of the regulation pool drops to a certain height, the intelligent injector is opened to flush the bottom of the pool, and the flushing water is automatically discharged to the front end of the first grid groove to realize the empty pool of the regulation pool.
The above-mentioned embodiments are illustrative and should not be construed as limiting the scope of the invention, which is defined by the appended claims, and all modifications of the equivalent forms of the present invention which are obvious to those skilled in the art after reading the present invention.
Claims (9)
1. The utility model provides a sewage treatment system, includes a plurality of processing lines, its characterized in that, processing line is including the preprocessing unit, first opening and closing mechanism and the biochemical treatment unit that communicate in proper order, the intercommunication has second opening and closing mechanism between preprocessing unit and the first opening and closing mechanism, and the delivery port intercommunication that the structure was opened and close to the second has the regulation pond, the delivery port intercommunication in regulation pond has third opening and closing mechanism, and the delivery port and the preprocessing unit intercommunication of third opening and closing mechanism.
2. The sewage treatment system of claim 1, wherein a materialization unit is arranged at the top of the regulation pool and comprises a flocculation pool and a sedimentation pool which are sequentially communicated, a submersible pump is arranged in the regulation pool, a water outlet of the submersible pump is communicated with the flocculation pool, and a water outlet of the sedimentation pool is communicated with the pretreatment unit.
3. The wastewater treatment system of claim 2, wherein the storage tank comprises a tank body, wherein the inner bottom of the tank body is provided with a groove, and the submersible pump is arranged in the groove.
4. The wastewater treatment system of claim 2, wherein the inner bottom of the storage tank is provided with a smart jet.
5. The sewage treatment system of claim 1, wherein the pretreatment unit comprises a first grid groove, a lifting mechanism, a second grid groove and a grit chamber which are sequentially communicated, and a water outlet of the grit chamber is communicated with a first opening and closing mechanism; the first grid groove and the second grid groove are respectively provided with a grid, and the size of the holes of the grids in the first grid groove is larger than that of the holes of the grids in the second grid groove.
6. The wastewater treatment system of claim 5, wherein the storage tank is located at a position higher than the first grid groove.
7. The sewage treatment system according to any one of claims 1 to 6, further comprising a main pipe having an outlet to which the first treatment line and the second treatment line are connected; the first treatment line comprises a pretreatment unit A, a first opening and closing mechanism A and a biochemical treatment unit A which are sequentially communicated, a second opening and closing mechanism A is communicated between the pretreatment unit A and the first opening and closing mechanism A, and a water outlet of the second opening and closing mechanism A is communicated with the regulation and storage tank; the second treatment line comprises a pretreatment unit B, a first opening and closing mechanism B and a biochemical treatment unit B which are sequentially communicated, a second opening and closing mechanism B is communicated between the pretreatment unit B and the first opening and closing mechanism B, and a water outlet of the second opening and closing mechanism B is communicated with the storage tank.
8. The wastewater treatment system according to claim 7, wherein the main pipe is provided with a first monitoring mechanism for monitoring water quality.
9. The sewage treatment system of claim 7, wherein a fourth opening and closing mechanism A and a fourth opening and closing mechanism B are connected to a water outlet of the third opening and closing mechanism in parallel, a water outlet of the fourth opening and closing mechanism A is communicated with the pretreatment unit A, and a water outlet of the fourth opening and closing mechanism B is communicated with the pretreatment unit B.
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| CN202021391697.7U CN213357235U (en) | 2020-07-15 | 2020-07-15 | Sewage treatment system |
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| CN202021391697.7U CN213357235U (en) | 2020-07-15 | 2020-07-15 | Sewage treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062386A (en) * | 2020-07-15 | 2020-12-11 | 中国电建集团中南勘测设计研究院有限公司 | Sewage treatment system and sewage treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112062386A (en) * | 2020-07-15 | 2020-12-11 | 中国电建集团中南勘测设计研究院有限公司 | Sewage treatment system and sewage treatment method |
| CN112062386B (en) * | 2020-07-15 | 2022-11-04 | 中国电建集团中南勘测设计研究院有限公司 | Sewage treatment system and sewage treatment method |
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