CN111003817A - Biochemical tank medicament or nutritive salt are at uniform velocity dosing system - Google Patents
Biochemical tank medicament or nutritive salt are at uniform velocity dosing system Download PDFInfo
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- CN111003817A CN111003817A CN201911423339.1A CN201911423339A CN111003817A CN 111003817 A CN111003817 A CN 111003817A CN 201911423339 A CN201911423339 A CN 201911423339A CN 111003817 A CN111003817 A CN 111003817A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 23
- 239000003814 drug Substances 0.000 title claims description 21
- 230000000050 nutritive effect Effects 0.000 title claims description 7
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 235000015097 nutrients Nutrition 0.000 claims abstract description 21
- 238000005303 weighing Methods 0.000 claims abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims description 33
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005536 corrosion prevention Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005842 biochemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention discloses a constant-speed chemical or nutrient salt adding system for a biochemical pool, which comprises a first electromagnetic flowmeter and a pH online monitor which are arranged on the biochemical pool, wherein a dripping tank is arranged above the biochemical pool, the lower part of the dripping tank is communicated with a liquid outlet pipe, a rotameter, an electric valve and a manual regulating valve are sequentially arranged on the liquid outlet pipe, and the manual regulating valve is far away from the dripping tank; a liquid distribution tank is arranged on one side of the biochemical tank, a pipeline pump is communicated with the lower part of the liquid distribution tank, an outlet of the pipeline pump is communicated with the top of the dripping tank, a feed inlet and a solvent inlet are formed in the liquid distribution tank, a second electromagnetic flow meter is arranged on the solvent inlet, and an electronic weighing system is arranged on one side of the feed inlet; a PLC controller is arranged on one side of the liquid distribution tank, and the second electromagnetic flowmeter, the electronic weighing system, the pipeline pump, the electric valve, the rotor flowmeter, the pH on-line monitor and the first electromagnetic flowmeter are all in communication connection with the PLC controller; the dropping of the feed liquid is accurate and labor-saving.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a uniform-speed adding system for a chemical or nutrient salt in a biochemical tank.
Background
The biochemical method is a method commonly used in the sewage treatment process, and is a method for removing organic matters in sewage and reducing the content of various nutrients in the sewage by utilizing the characteristics of microorganisms in the nature. The sources of each sewage are different, and the conditions for maintaining the normal growth of microorganisms are different.
For example, starch or alcohol wastewater has high COD in water and is deficient in nutrients such as nitrogen and phosphorus. The ratio of nutrients required by the normal growth of microbial cells, namely anaerobic biochemical reaction C: N: P is 500:5:1, and aerobic biochemical reaction C: N: P is 100:5:1, so that the sewage cannot achieve a good treatment effect if the nutrients such as nitrogen and phosphorus in the sewage are not supplemented.
For some industrial sewage with poor biodegradability and BOD/COD <0.3, the B/C ratio needs to be adjusted to supplement available biological carbon sources such as glucose and the like to improve the biodegradability, so that the industrial sewage can be treated by a biochemical method.
In addition, for some high ammonia nitrogen sewage which is very easy to be acid biased in pH or high in COD in the aerobic process, a large amount of acid is generated in the anaerobic biochemical reaction process, the alkalinity needs to be supplemented in time, and the normal growth and metabolism of microorganisms can be maintained by adjusting the pH of the sewage.
Therefore, in order to achieve the best sewage treatment effect, the normal activity of microorganisms needs to be maintained in the biochemical treatment by regularly adding nutrient salts or medicaments, so as to promote the metabolic growth and propagation of the microorganisms. And the problems of deterioration of the treated water quality, increase of cost, expansion of activated sludge and the like are caused by excessive or insufficient addition of nutrient salts or medicaments. Because the water quantity and the water quality fluctuate, the traditional adding mode is as follows: the manual intervention is excessive, the adding amount is not accurate enough, the utilization rate of nutrient salt or medicament is low, the operation is limited, the labor amount of manpower is large, the mechanization degree is low, and the working efficiency is low; and adopt the mode of general stock solution bucket with the medicament pump, can't in time accurately adjust the flow of medicine pump according to the water yield, need personnel to intervene in real time.
Disclosure of Invention
In order to solve the problem that the flow rate of the existing dosing can not be accurately controlled, the invention provides a constant-speed dosing system for a medicament or nutrient salt in a biochemical tank.
The technical scheme adopted by the invention is as follows: a biochemical pool medicament or nutritive salt uniform velocity dosing system comprises a first electromagnetic flowmeter and a pH on-line monitor which are arranged on a biochemical pool, wherein a dripping tank is arranged above the biochemical pool, the lower part of the dripping tank is communicated with a plurality of liquid outlet pipes, each liquid outlet pipe is provided with a rotameter, an electric valve and a manual regulating valve, the electric valve is arranged between the rotameter and the manual regulating valve, the manual regulating valve is far away from the dripping tank, the electric valve is normally closed, and the flow velocity of each pipeline is set according to the manual valve and the rotameter;
a liquid preparation tank is arranged on one side of the biochemical tank, a pipeline pump is communicated with the lower part of the liquid preparation tank, an outlet of the pipeline pump is communicated with the top of the dripping tank, a charging opening and a solvent inlet are formed in the liquid preparation tank, a second electromagnetic flow meter is arranged on the solvent inlet, an electronic weighing system is arranged on one side of the charging opening, and the top of the dripping tank is communicated with the top of the liquid preparation tank; a PLC controller is arranged on one side of the liquid distribution tank, and the second electromagnetic flowmeter and the electronic weighing system are in communication connection with the PLC controller; the pipeline pump is in communication connection with the PLC; motorised valve, rotor flow meter, pH on-line monitoring appearance and first electromagnetic flow meter all are connected with the communication of PLC controller.
Further limiting, a stirrer is arranged on the liquid preparation tank, the stirring end of the stirrer extends into the liquid preparation tank, and the motor end of the stirrer is fixed on the upper surface of the liquid preparation tank.
Further limiting, a high liquid level observation port, a middle liquid level observation port and a low liquid level observation port, an ultrasonic liquid level controller and an alarm system are arranged on the liquid preparation tank along the longitudinal direction of the liquid preparation tank, and the ultrasonic liquid level controller and the alarm system are both in communication connection with the PLC.
Further limiting, a feeding platform is arranged on one side of the liquid preparation tank, a step ladder is obliquely arranged on one side of the feeding platform, and the oblique upper end of the step ladder is fixedly connected with the feeding platform; the electronic weighing system is arranged on the charging platform.
Further defined, the charging opening faces the charging platform.
Further limiting, the liquid preparation tank is made of carbon steel for corrosion prevention or glass fiber reinforced plastic or polyethylene. ,
compared with the prior art, the invention has the beneficial effects that: calculating the concentration of the medicament or nutritive salt by the PLC according to the second electromagnetic flowmeter and the electronic weighing system, and controlling the opening or closing of the electric valves on the liquid outlet pipes according to the pH on-line monitor for controlling the quality of the required medicament; the first electromagnetic flowmeter is used for controlling, and the electric valves on the liquid outlet pipes are opened or closed to control the quality of the required nutritive salt; thereby ensuring the relative accuracy of the addition of the medicament or the nutrient salt; the method does not need manual real-time intervention, saves manpower, can ensure the relative accuracy of the addition of the medicament or the nutrient salt, and ensures the normal work of the microorganism.
Drawings
FIG. 1 is a flow chart of a uniform-speed adding system for a medicament or nutrient salt in a biochemical tank;
wherein, 1-a biochemical pool; 2-liquid preparation tank; 3-a dropping tank; 4-a stirrer; 5-an electronic weighing system; 6-a feed inlet; 7-solvent inlet; 8-a pipeline pump; 9-an electric valve; 10-manual regulating valve; 11-online pH monitor; 12-a first electromagnetic flow meter; 13-a second electromagnetic flow meter; 14-a charging platform; 15-step ladder; 16-a PLC controller; 17-a return pipe; 18-rotor flow meter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Example 1
As shown in figure 1, a biochemical pond 1 medicament or nutritive salt is at uniform velocity dosing system, including setting up first electromagnetic flowmeter 12 and pH on-line monitoring appearance 11 on biochemical pond 1, biochemical pond 1 top is provided with dropwise add jar 3, and the lower part intercommunication of dropwise add jar 3 has four drain pipes, and the serial number divide into 1, 2, 3 and 4, and No. 1 drain pipe is the minimum velocity of flow, and the velocity of flow of drain pipe 2, 3, 4 sets up 2 times, 3 times, 4 times of the velocity of flow of No. 1 drain pipe respectively. The flow velocity adjustment of 0-12 times of the lowest flow velocity can be realized by setting the opening of the drain pipes 1, 2, 3 and 4, and the electric valves on the drain pipes 1, 2, 3 and 4 are respectively numbered as electric valves 1, 2, 3 and 4; the flow rate of the electric valve 1 is 0.25m3D, flow rate of the electric valve 2 is 0.5m3D, flow rate of the electric valve 3 is 1m3D, flow rate of the electric valve 4 is 1.25m3The specific formula is as follows:
modes of the PLC and the pH control agent are as follows: and respectively setting the pH variable range start and stop corresponding to each liquid outlet pipe. The pH value is more than 5.90 and less than 5.95, the electric valves 1, 2, 3 and 4 are opened, and the flow rate is 12 times of the lowest flow rate; when the flow rate is more than 5.95 and less than p H and less than 6.00, the electric valves 2, 3 and 4 are opened, and the electric valve 1 is closed, which is 11 times of the lowest flow rate; the pH value is more than 6.00 and less than 6.05, the electric valves 1, 3 and 4 are opened, the electric valve 2 is closed, and the minimum flow rate is 10 times. pH is more than 6.05 and less than 6.10, electric valves 3 and 4 are opened, electric valves 1 and 2 are closed, and the minimum flow rate is 9 times. The pH value is more than 6.10 and less than 6.15, the electric valves 1, 2 and 4 are opened, and the electric valve 3 is closed to achieve the minimum flow rate of 8 times. pH is more than 6.15 and less than 6.20, the lowest flow rate is 7 times when the electric valves 1, 2 and 3 are opened and the electric valve 4 is closed. The lowest flow rate of 6 times is that the pH value is more than 6.20 and less than 6.25, the electric valves 1 are opened, the electric valves 3 are closed by 4, and the electric valves 4 are closed; the pH value is more than 6.25 and less than 6.30, the electric valve 4 is opened, and the electric valves 1, 2 and 3 are closed, thereby achieving the minimum flow rate of 5 times; the pH value is more than 6.30 and less than 6.35, the electric valve 3 is opened, and the electric valves 1, 2 and 4 are closed to obtain the lowest flow rate of 4 times; the lowest flow rate of 3 times is that the electric valves 1 are opened and the electric valves 3 and 4 are closed by the electric valves 1 and 2 when the pH value is more than 6.35 and less than 6.40, the lowest flow rate of 2 times is that the pH value is more than 6.40 and the pH value is less than 6.45, the lowest flow rate of 2 times is that the electric valves 1 are opened and the electric valves 2, 3 and 4 are closed by the electric valves 1 when the pH value is more than 6.45 and less than 6.50, and the. Alkali liquor is not required to be dripped when the pH value is more than 6.5, and the lowest flow rate of 0 time is obtained when the electric valves 1, 2, 3 and 4 are closed.
The PLC and the biochemical pool water inlet electromagnetic flowmeter control the nutrient solution dripping mode: respectively setting a flow variable range start-stop electric valve corresponding to each liquid outlet pipe, namely setting the average water inlet flow velocity V in the whole day according to the configured known nutrient salt concentrationpCorrespondingly setting the normal nutrient salt dropping flow velocity VnThe flow rates of No. 1, 2, 3 and 4 liquid outlet pipes are respectively adjusted to 1/6V by a manual valve and a rotor flow metern、2/6Vn、4/6Vn、5/6Vn. The lowest flow rate of 6 times of the electric valves 2, 3 and 4 which are opened and closed is the normal flow rate. The flow rate of the biochemical pool flow meter is according to the normal average flow rate VpFluctuation 1/6V for every up-and-down changepControlling the start and stop of a corresponding electric valve, and adjusting the dripping flow rate to 1/6VnThe up-and-down fluctuation of the pressure can realize 0 to 2 times of VpAnd adjusting the interval of the change of the flow rate.
The liquid outlet pipe is provided with a rotor flow meter 18, an electric valve 9 and a manual regulating valve 10, the electric valve 9 is arranged between the rotor flow meter 18 and the manual regulating valve 10, and the manual regulating valve 10 is far away from the dripping tank 3;
a liquid preparation tank 2 is arranged on one side of the biochemical tank 1, the lower part of the liquid preparation tank 2 is communicated with a pipeline pump 8, the outlet of the pipeline pump 8 is communicated with the top of the dripping tank 3, a feed inlet 6 and a solvent inlet 7 are arranged on the liquid preparation tank 2, a second electromagnetic flow meter is arranged on the solvent inlet 7, and an electronic weighing system 5 is arranged on one side of the feed inlet 6; the top of the dripping tank 3 is communicated with the top of the liquid preparation tank 2, specifically, the top of the dripping tank 3 is communicated through a return pipe 17, the distance between the joint of the return pipe 17 and the dripping tank 3 and the top of the dripping tank 3 is 100-200 mm, redundant solution in the dripping tank 3 flows back to the liquid preparation tank 2, and the phenomenon that the solution flows out of the dripping tank 3 due to the fact that the flow speed of a pipeline pump 8 is too high is avoided; a PLC (programmable logic controller) 16 is arranged on one side of the liquid distribution tank 2, and the second electromagnetic flowmeter 13 and the electronic weighing system 5 are in communication connection with the PLC 16; the pipeline pump 8 is in communication connection with the PLC 16 and used for controlling the starting and stopping of the pipeline pump 8, and the starting and stopping time of the pipeline pump 8 can be set in the PLC 16, so that the starting and stopping of the pipeline pump 8 are automatically controlled, manual operation is reduced, the liquid level in the dripping tank 3 is always maintained at a high liquid level, and the dripping flow rate change caused by the self-weight change is not influenced; the electric valve 9, the rotor flow meter 18, the pH on-line monitor 11 and the first electromagnetic flow meter 12 are all in communication connection with the PLC 16.
The liquid preparation tank 2 is provided with a stirrer 4, the stirring end of the stirrer 4 extends into the liquid preparation tank 2, and the motor end of the stirrer 4 is fixed on the upper surface of the liquid preparation tank 2. The dripping tank 3 and the liquid preparation tank 2 are both made of carbon steel corrosion-resistant or glass fiber reinforced plastic or polyethylene. The stirrer 4 is a vertical stirrer;
the liquid distribution tank 2 is provided with a high liquid level observation port, a middle liquid level observation port and a low liquid level observation port along the longitudinal direction, an ultrasonic liquid level controller and an alarm system which are both in communication connection with the PLC 16. A feeding platform 14 is arranged on one side of the liquid preparation tank 2, a step 15 is obliquely arranged on one side of the feeding platform 14, and the oblique upper end of the step 15 is fixedly connected with the feeding platform 14; the electronic weighing system 5 is arranged on the loading platform 14. The loading mouth 6 faces the loading platform 14.
In this embodiment, the control electrical diagram of the PLC controller 16 is realized by those skilled in the art using conventional technical means, and is not described in detail in this embodiment.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (6)
1. A biochemical pool medicament or nutritive salt uniform velocity dosing system is characterized by comprising a first electromagnetic flowmeter and a pH on-line monitor which are arranged on a biochemical pool, wherein a dripping tank is arranged above the biochemical pool, the lower part of the dripping tank is communicated with a plurality of liquid outlet pipes, each liquid outlet pipe is provided with a rotor flowmeter, an electric valve and a manual regulating valve, the electric valve is arranged between the rotor flowmeter and the manual regulating valve, and the manual regulating valve is far away from the dripping tank;
a liquid preparation tank is arranged on one side of the biochemical tank, a pipeline pump is communicated with the lower part of the liquid preparation tank, an outlet of the pipeline pump is communicated with the top of the dripping tank, a charging opening and a solvent inlet are formed in the liquid preparation tank, a second electromagnetic flow meter is arranged on the solvent inlet, an electronic weighing system is arranged on one side of the charging opening, and the top of the dripping tank is communicated with the top of the liquid preparation tank; a PLC controller is arranged on one side of the liquid distribution tank, and the second electromagnetic flowmeter and the electronic weighing system are in communication connection with the PLC controller; the pipeline pump is in communication connection with the PLC; motorised valve, rotor flow meter, pH on-line monitoring appearance and first electromagnetic flow meter all are connected with the communication of PLC controller.
2. The biochemical tank medicament or nutrient salt constant-speed dosing system according to claim 1, wherein a stirrer is arranged on the liquid preparation tank, a stirring end of the stirrer extends into the liquid preparation tank, and a motor end of the stirrer is fixed on the upper surface of the liquid preparation tank.
3. The biochemical tank medicament or nutrient salt uniform-speed dosing system as claimed in claim 2, wherein the liquid preparation tank is provided with three liquid level observation ports, a high liquid level observation port, a middle liquid level observation port and a low liquid level observation port, an ultrasonic liquid level controller and an alarm system along the longitudinal direction of the liquid preparation tank, and the ultrasonic liquid level controller and the alarm system are both in communication connection with the PLC controller.
4. The biochemical pool medicament or nutrient salt uniform-speed adding system according to any one of claims 1 to 3, wherein a feeding platform is arranged on one side of the liquid preparation tank, a step ladder is obliquely arranged on one side of the feeding platform, and the oblique upper end of the step ladder is fixedly connected with the feeding platform; the electronic weighing system is arranged on the charging platform.
5. The biochemical tank medicament or nutrient salt constant-speed dosing system as claimed in claim 4, wherein the feed inlet faces the feeding platform.
6. The biochemical tank medicament or nutrient salt constant-speed dosing system as claimed in claim 5, wherein the liquid preparation tank is made of carbon steel corrosion prevention or glass fiber reinforced plastic or polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423339.1A CN111003817A (en) | 2019-12-31 | 2019-12-31 | Biochemical tank medicament or nutritive salt are at uniform velocity dosing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423339.1A CN111003817A (en) | 2019-12-31 | 2019-12-31 | Biochemical tank medicament or nutritive salt are at uniform velocity dosing system |
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| CN111003817A true CN111003817A (en) | 2020-04-14 |
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| CN201911423339.1A Pending CN111003817A (en) | 2019-12-31 | 2019-12-31 | Biochemical tank medicament or nutritive salt are at uniform velocity dosing system |
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| US20190389756A1 (en) * | 2018-06-22 | 2019-12-26 | Nanjing University | Apparatus and operating method for deep denitrification and toxicity reduction of wastewater |
| CN211445240U (en) * | 2019-12-31 | 2020-09-08 | 武汉益锦祥生物环保有限公司 | Biochemical tank medicament or nutritive salt are at uniform velocity dosing system |
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2019
- 2019-12-31 CN CN201911423339.1A patent/CN111003817A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2725281Y (en) * | 2004-09-14 | 2005-09-14 | 袁本松 | Metering liquid feeding device |
| CN1792820A (en) * | 2005-12-05 | 2006-06-28 | 华东理工大学 | Process for preparing nano manganese dioxide uniforming dispersing in water phate |
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