CN111392920A - High-efficient micro-nano air supporting sewage treatment plant - Google Patents
High-efficient micro-nano air supporting sewage treatment plant Download PDFInfo
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- CN111392920A CN111392920A CN202010416541.8A CN202010416541A CN111392920A CN 111392920 A CN111392920 A CN 111392920A CN 202010416541 A CN202010416541 A CN 202010416541A CN 111392920 A CN111392920 A CN 111392920A
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- flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F2001/007—Processes including a sedimentation step
Abstract
The invention provides a high-efficiency micro-nano air floatation sewage treatment device, and relates to the technical field of sewage treatment. This high-efficient micro-nano air supporting sewage treatment plant, including high-efficient gas-liquid mixing pump, negative pressure flow controller, micro-nano dissolved air preparation ware, little vortex reactor, initiation tubular dissolved air releaser, vortex mixing reactor, flocculating agent charge device, coagulant aid charge device, micro-nano bubble mixing reaction tank of flocculation, mechanical sediment machine, slag notch, pipe chute gathering clarifier, delivery port and row mud sediment sand discharging mouth. This high-efficient micro-nano air supporting sewage treatment plant, simple and practical, degree of automation is high, utilizes the entry negative pressure adsorbed gas of pump, carries out gas-liquid mixture through the impeller of pump, reduces and dissolves the gas time, improves and dissolves gas efficiency.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-efficiency micro-nano air floatation sewage treatment device.
Background
At present, a large amount of oily sewage is generated in the production process of oil exploitation and refining, in order to realize resource utilization after sewage purification or discharge treatment reaching standards, different flotation and sedimentation processes are adopted in treatment engineering at present, wherein the conventional positive pressure dissolved air flotation is widely applied in the aspects of oil removal and suspended solid removal, but the pressure dissolved air flotation in China or the adoption of a metal structure or a reinforced concrete structure has the disadvantages of poor dissolved air effect, high backflow ratio, large occupied area, low treatment efficiency and the like
The prior positive pressure dissolved air flotation is realized by mixing air and water under the condition of double pressurization, releasing air bubbles through pressure reduction of a dissolved air releaser, forming floc by coagulant and coagulant aid added into sewage, combining the floc and floating to the surface, and removing solid pollutants in water.
The traditional positive pressure dissolved air floatation system comprises a positive pressure dissolved air system, a medicament mixing reaction zone, a floatation separation zone, a booster pump, a dissolved air tank and a dissolved air releaser, wherein 30 percent of water after floatation flows back to the dissolved air tank through the booster pump, the water is pressurized by compressed air and dissolved and mixed with water, sewage forms compact flocs in the mixing reaction zone through adding a flocculating agent and a coagulant aid, the dissolved air water releases a large amount of bubbles through the dissolved air releaser, the bubbles are bonded with the flocs in the water and combined in the floatation separation zone to float to the surface, the mixture is discharged to a scum groove through a scum scraper, and the sewage purified by floatation is discharged from the middle lower part. The silt with higher density is discharged by the bottom pressure.
The traditional positive pressure dissolved air flotation is matched with corresponding agents, so that the effect of purifying sewage can be achieved, but the following problems exist in the actual operation process:
1. the prior positive pressure dissolved air flotation is pressurized to 0.3-0.5MPa by a circulating booster pump, compressed air is dissolved and mixed in a pressure air container after being pressurized by a pump, and the container is filled with filler or a special structure, so that the mineralization degree in sewage is high, and after a long time of operation of pollutants, the dissolved air in the dissolved air container and a dissolved air releaser can be scaled and blocked, so that the dissolved air effect is poor and the treatment effect is reduced.
2. The existing air floatation device has long retention time and high designed reflux ratio, and a large device occupying area basically has the disadvantages of high construction cost of a reinforced concrete structure, high construction difficulty and inconvenient operation and management.
Disclosure of Invention
The invention aims to provide a high-efficiency micro-nano air-flotation sewage treatment device which is simple and practical and high in automation degree, and gas is adsorbed by negative pressure at an inlet of a pump and is mixed with gas and liquid by an impeller of the pump, so that the gas dissolving time is shortened, and the gas dissolving efficiency is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a high-efficient micro-nano air supporting sewage treatment plant, includes high-efficient gas-liquid mixing pump, negative pressure flow controller, micro-nano dissolved air preparation ware, little vortex reactor, causes the tubular dissolved air releaser, vortex mixing reactor, flocculating agent charge device, coagulant aid charge device, the micro-nano bubble mixing reaction tank of flocculation, machinery scrape sediment machine, slag notch, pipe chute gathering clarifier, delivery port and row's mud sediment sand discharging mouth, its characterized in that: high-efficient gas-liquid mixing pump passes through the pipeline and is connected with negative pressure flow controller, micro-nano dissolved air preparation ware and flocculation micro-nano bubble mixing reaction tank respectively, vortex mixing reactor, flocculating agent charge device and coagulant aid charge device all are connected with the micro-vortex reactor through the pipe, the micro-vortex reactor passes through the pipe and is connected with initiation tubular dissolved air releaser, initiation tubular dissolved air releaser is located flocculation micro-nano bubble mixing reaction tank, vortex mixing reactor, flocculating agent charge device, coagulant aid charge device all are connected with flocculation micro-nano bubble mixing reaction tank through the pipe, the sediment machine is scraped to machinery sets up in micro-nano flocculation bubble mixing reaction tank.
Further, slag notch and delivery port set up respectively in the micro-nano bubble of flocculation mixed reaction tank both sides, and slag notch and delivery port and the micro-nano bubble of flocculation mixed reaction tank intercommunication.
Further, arrange mud row husky mouth and the micro-nano bubble mixed reaction groove intercommunication of flocculation, and arrange mud row husky mouth and set up in the micro-nano bubble mixed reaction groove's of flocculation one side and be close to the bottom.
Further, the inclined tube aggregation clarifier is arranged in the flocculation micro-nano bubble mixing reaction tank.
Furthermore, the material of the inclined tube gathering clarifier is PP polypropylene or stainless steel.
Further, the initiation pipe type dissolved air releaser is a decompression straight pipe with the diameter of 25-32 mm.
A use method of a high-efficiency micro-nano air floatation sewage treatment device comprises the following steps:
s1, enabling the oily sewage to enter a vortex mixing reactor, flocculating by a flocculating agent dosing device and a coagulant aid dosing device, and adding coagulant aid medicament, and then carrying out high-speed rotational flow to elongate the medicament molecular chain structure of the vortex mixing reactor.
S2, enabling the oily sewage to enter a flocculation micro-nano bubble mixing reaction tank, starting a high-efficiency gas-liquid mixing pump when the flocculation micro-nano bubble mixing reaction tank is filled with water, enabling the oily sewage to enter a micro-nano dissolved air preparation device, and controlling a control valve of a tubular dissolved air releaser to enable the pressure of the micro-nano dissolved air preparation device to be 0.5 Mpa.
S3, opening the negative pressure flow controller, sucking a gas-liquid two-phase mixture by a high-efficiency gas-liquid mixing pump, conveying the mixture to the micro-nano dissolved air preparation device through a pipeline, then entering the micro-vortex reactor to perform micro-nano bubble reinforced mixing, and releasing bubbles with the diameter of about 30 microns through an initiation tubular dissolved air releaser to enter a flocculation micro-nano bubble mixing reaction tank.
S4, carrying out adhesive mixing on the medicament, the micro-nano bubbles, the oil in water and pollutants in the flocculation micro-nano bubble mixing reaction tank, floating to the micro-nano air flotation surface, scraping to a slag outlet by a mechanical slag scraper and discharging, enabling the water subjected to flotation to pass through an inclined tube aggregation clarifier, enabling a small amount of pollutants not floating in the water to coalesce and sink, discharging to a sewage tank through a sludge and sand discharge outlet, carrying out micro-nano dissolved air preparation on 10-20% of the water treated by the flotation and inclined tube aggregation clarifier again, discharging the rest of the water subjected to negative pressure micro-nano dissolved air flotation treatment through a water outlet, and connecting the positions by adopting pipeline valves.
The invention provides a high-efficiency micro-nano air floatation sewage treatment device. The method has the following beneficial effects:
(1) this high-efficient micro-nano air supporting sewage treatment plant adopts negative pressure adsorption formula gas-liquid mixture to dissolve gas efficient, guarantees that gaseous supersaturation dissolved state that reaches can reduce the volume that the gas pitcher was dissolved to pressure simultaneously and dissolve the required time of gas.
(2) This high-efficient micro-nano air supporting sewage treatment plant, dissolved air releaser are initiation formula straight tube, and the natural rise time is saved to boosting formula structural design, can prevent to block up.
(3) This high-efficient micro-nano air supporting sewage treatment plant, the integral type setting through the air supporting device for the air supporting device has structural layout reasonable, compact structure, advantage such as technology is reasonable, simultaneously owing to there is the vortex blender, improves the medicament availability factor, saves the medicament and can reach more than 20%, thereby can shorten sewage treatment time, has increased the throughput of unit area.
(4) The efficient micro-nano air floatation sewage treatment device adopts micro-nano bubbles with the average diameter of 30-50 mu m and the reflux ratio of 5-20 percent, has good treatment efficiency, can save more than 60 percent of occupied area, and is convenient for skid-mounting and transportation.
Drawings
FIG. 1 is a schematic diagram of the present invention.
In the figure: 1. a high-efficiency gas-liquid mixing pump; 2. a negative pressure flow controller; 3. a micro-nano dissolved air preparation device; 4. a micro-vortex reactor; 5. triggering a tubular dissolved air releaser; 6. a vortex mixing reactor; 7. a flocculating agent dosing device; 8. a coagulant aid dosing device; 9. a flocculation micro-nano bubble mixing reaction tank; 10. a mechanical slag scraper; 11. a slag outlet; 12. an inclined tube aggregation clarifier; 13. a water outlet; 14. a sludge and sand discharging port.
Detailed Description
The invention will be further illustrated with reference to the following examples and drawings:
referring to fig. 1, a high-efficiency micro-nano air-flotation sewage treatment device comprises a high-efficiency gas-liquid mixing pump 1, a negative pressure flow controller 2, a micro-nano dissolved air preparation device 3, a micro-vortex reactor 4, an initiation tube type dissolved air releaser 5, a vortex mixing reactor 6, a flocculant dosing device 7, a coagulant aid dosing device 8, a flocculation micro-nano bubble mixing reaction tank 9, a mechanical slag scraper 10, a slag outlet 11, an inclined tube aggregation clarifier 12, a water outlet 13 and a sludge and sand discharge port 14, wherein the high-efficiency gas-liquid mixing pump 1 is respectively connected with the negative pressure flow controller 2, the micro-nano dissolved air preparation device 3 and the flocculation micro-nano bubble mixing reaction tank 9 through pipelines, the vortex mixing reactor 6, the flocculant dosing device 7 and the coagulant aid dosing device 8 are all connected with the micro-vortex reactor 4 through conduits, the micro-vortex reactor 4 is connected with the initiation tube type dissolved air releaser 5 through conduits, the initiation tube type dissolved gas releaser 5 is positioned in a flocculation micro-nano bubble mixing reaction tank 9, the vortex mixing reactor 6, a flocculant dosing device 7, a coagulant aid dosing device 8 are connected with the flocculation micro-nano bubble mixing reaction tank 9 through a conduit, a mechanical slag scraper 10 is arranged in the flocculation micro-nano bubble mixing reaction tank 9, a slag outlet 11 and a water outlet 13 are respectively arranged at two sides of the flocculation micro-nano bubble mixing reaction tank 9, the slag outlet 11 and the water outlet 13 are communicated with the flocculation micro-nano bubble mixing reaction tank 9, a sludge and sand discharge port 14 is communicated with the flocculation micro-nano bubble mixing reaction tank 9, the sludge and sand discharge port 14 is arranged at one side of the flocculation micro-nano bubble mixing reaction tank 9 and close to the bottom, the inclined tube aggregation clarifier 12 is arranged in the flocculation micro-nano bubble mixing reaction tank 9, and the inclined tube aggregation clarifier 12 is made of PP or stainless steel, the initiation tube type dissolved gas releaser 5 is a decompression straight tube with the diameter of 25-32mm, the boosting structural design saves the natural rising time and can prevent blockage, the high-efficiency micro-nano air floating device is an integral box-type structure, the top of the box body is provided with an overflow groove cover, the inside of the box body forms a reaction area through a fixedly arranged water inlet baffle, the rear side of the water inlet baffle is provided with an inclined plate or an inclined tube to form an inclined plate area, a sludge collecting area is formed below the inclined plate area, a separating area and a slag collecting area are formed above the inclined plate area, a water outlet area is formed on one side of the inclined plate area opposite to the reaction area, the wall of the box body is provided with a sewage inlet, a dissolved gas water inlet, a water outlet 13, a sludge and sand discharging port 14 and a slag discharging port 11, wherein the reaction area is respectively communicated with the vortex mixing reactor 6 and the dissolved gas releaser of the pressure dissolved gas device through the sewage inlet and the, a sludge discharge port is arranged in the sludge collection area, a slag discharge port 11 is arranged in the slag collection area, and a water outlet 13 is arranged in the water outlet area.
A use method of a high-efficiency micro-nano air floatation sewage treatment device comprises the following steps: s1, enabling oil-containing sewage to enter a vortex mixing reactor 6, enabling a flocculant dosing device 7 and a coagulant aid dosing device 8 to flocculate and dose coagulant aid chemicals, enabling the flocculant dosing device and the coagulant aid dosing device to carry out high-speed rotational flow to elongate the molecular chain structure of chemicals through the vortex mixing reactor 6, improving the use efficiency of the chemicals, S2, enabling the oil-containing sewage to enter a flocculation micro-nano bubble mixing reaction tank 9, starting a high-efficiency gas-liquid mixing pump 1 when the flocculation micro-nano bubble mixing reaction tank 9 is filled with water, enabling the oil-containing sewage to enter a micro-nano dissolved gas preparation device 3, controlling a control valve of an initiation tubular dissolved gas releaser 5 to enable the pressure of the micro-nano dissolved gas preparation device 3 to reach 0.5Mpa, S3, opening a negative pressure flow controller 2, sucking two-phase mixture from the high-efficiency gas-liquid mixing pump 1, conveying the mixture to the micro-nano dissolved gas preparation device 3 through a pipeline, enabling the micro, releasing bubbles with the diameter of about 30 mu m, entering a flocculation micro-nano bubble mixing reaction tank 9, S4, carrying out adhesion mixing on the medicament, the micro-nano bubbles, oil in water and pollutants in the flocculation micro-nano bubble mixing reaction tank 9, floating to the micro-nano air floatation surface, scraping to a slag outlet 11 by a mechanical slag scraper 10, discharging, enabling the water subjected to flotation to pass through an inclined tube aggregation clarifier 12, enabling a small amount of pollutants not floating in the water to coalesce and sink, discharging to a sewage tank through a mud discharge sand discharge outlet 14, carrying out micro-nano dissolved air preparation on 10-20% of the water treated by the flotation and inclined tube aggregation clarifier 12 again, discharging the rest of the water subjected to negative pressure micro-nano dissolved air floatation treatment through a water outlet 13, and connecting the positions by adopting pipeline valves.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (7)
1. The utility model provides a high-efficient micro-nano air supporting sewage treatment plant, including high-efficient gas-liquid mixing pump (1), negative pressure flow controller (2), micro-nano dissolved air preparation ware (3), little vortex reactor (4), cause tubular dissolved air releaser (5), vortex mixing reactor (6), flocculating agent charge device (7), coagulant aid charge device (8), micro-nano bubble mixing reaction tank (9) flocculate, sediment machine (10) are scraped to machinery, slag notch (11), pipe chute gathering clarifier (12), delivery port (13) and row's mud sediment outlet (14), its characterized in that: the high-efficiency gas-liquid mixing pump (1) is respectively connected with the negative pressure flow controller (2), the micro-nano dissolved gas preparation device (3) and the flocculation micro-nano bubble mixing reaction tank (9) through pipelines, the vortex mixing reactor (6), the flocculating agent dosing device (7) and the coagulant aid dosing device (8) are all connected with the micro-vortex reactor (4) through a conduit, the micro-vortex reactor (4) is connected with an initiation tube type dissolved gas releaser (5) through a conduit, the initiation pipe type dissolved air releaser (5) is positioned in the flocculation micro-nano bubble mixing reaction tank (9), the vortex mixing reactor (6), the flocculating agent dosing device (7) and the coagulant aid dosing device (8) are all connected with a flocculation micro-nano bubble mixing reaction tank (9) through a conduit, the mechanical slag scraper (10) is arranged in the flocculation micro-nano bubble mixing reaction tank (9).
2. The efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized in that: slag notch (11) and delivery port (13) set up respectively in flocculation micro-nano bubble mixing reaction tank (9) both sides, and slag notch (11) and delivery port (13) and flocculation micro-nano bubble mixing reaction tank (9) intercommunication.
3. The efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized in that: arrange mud and arrange husky mouth (14) and flocculation micro-nano bubble mixing reaction tank (9) intercommunication, and arrange mud and arrange husky mouth (14) and set up in one side of flocculation micro-nano bubble mixing reaction tank (9) and be close to the bottom.
4. The efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized in that: the inclined tube aggregation clarifier (12) is arranged in the flocculation micro-nano bubble mixing reaction tank (9).
5. The efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized in that: the material of the inclined tube gathering clarifier (12) is PP polypropylene or stainless steel.
6. The efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized in that: the initiation pipe type dissolved air releaser (5) is a decompression straight pipe with the diameter of 25-32 mm.
7. The use method of the efficient micro-nano air-flotation sewage treatment device according to claim 1, characterized by comprising the following steps:
s1, enabling the oily sewage to enter a vortex mixing reactor (6), flocculating by a flocculating agent dosing device (7) and a coagulant aid dosing device (8), and adding coagulant aid medicament, and then, carrying out high-speed rotational flow to elongate the medicament molecular chain structure of the vortex mixing reactor (6);
s2, enabling the oily sewage to enter a flocculation micro-nano bubble mixing reaction tank (9), starting a high-efficiency gas-liquid mixing pump (1) when the flocculation micro-nano bubble mixing reaction tank (9) is filled with water, enabling the oily sewage to enter a micro-nano dissolved air releaser (3), and controlling a control valve of an initiation tubular dissolved air releaser (5) to enable the pressure of the micro-nano dissolved air releaser (3) to be 0.5 Mpa;
s3, opening the negative pressure flow controller (2), sucking a gas-liquid two-phase mixture by a high-efficiency gas-liquid mixing pump (1), conveying the mixture to the micro-nano dissolved air preparation device (3) through a pipeline, then entering the micro-vortex reactor (4) for carrying out micro-nano bubble reinforced mixing, releasing bubbles with the diameter of about 30 mu m by an initiation tubular dissolved air releaser (5), and entering a flocculation micro-nano bubble mixing reaction tank (9);
s4, carrying out adhesive mixing on the medicament, the micro-nano bubbles, the oil in water and pollutants in a flocculation micro-nano bubble mixing reaction tank (9), floating to the surface of micro-nano air floatation, scraping to a slag outlet (11) by a mechanical slag scraper (10), discharging, enabling the water after flotation to pass through an inclined tube aggregation clarifier (12), enabling a small amount of pollutants not floating in the water to coalesce and sink, discharging to a sewage tank through a sludge and sand discharge outlet (14), carrying out micro-nano dissolved air preparation on 10-20% of the water after the water is treated by the flotation and inclined tube aggregation clarifier (12), discharging the rest of the water after negative pressure micro-nano dissolved air floatation treatment through a water outlet (13), and adopting pipeline valves to connect all the positions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010416541.8A CN111392920A (en) | 2020-05-18 | 2020-05-18 | High-efficient micro-nano air supporting sewage treatment plant |
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| CN202010416541.8A CN111392920A (en) | 2020-05-18 | 2020-05-18 | High-efficient micro-nano air supporting sewage treatment plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321262A (en) * | 2021-07-01 | 2021-08-31 | 江西台标环保有限公司 | Coagulation air flotation method suitable for textile printing and dyeing wastewater treatment |
| CN113754115A (en) * | 2021-09-09 | 2021-12-07 | 深圳瑞赛环保科技有限公司 | Catalytic filler for PCB (printed Circuit Board) ink wastewater pretreatment, preparation method and treatment method and equipment |
| CN114314958A (en) * | 2022-01-11 | 2022-04-12 | 大庆市中良科技开发有限公司 | Pretreatment method for crude oil electric desalting high-concentration sewage of refinery |
| CN114477351A (en) * | 2021-12-24 | 2022-05-13 | 鞍钢集团矿业有限公司 | Method for treating suspended matters in mineral processing wastewater |
| CN116282741A (en) * | 2023-04-11 | 2023-06-23 | 江苏金桥油脂科技有限公司 | Treatment process of waste liquid from palm oil production |
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2020
- 2020-05-18 CN CN202010416541.8A patent/CN111392920A/en not_active Withdrawn
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113321262A (en) * | 2021-07-01 | 2021-08-31 | 江西台标环保有限公司 | Coagulation air flotation method suitable for textile printing and dyeing wastewater treatment |
| CN113321262B (en) * | 2021-07-01 | 2022-12-23 | 福建永丰针纺有限公司 | Coagulation air flotation method suitable for textile printing and dyeing wastewater treatment |
| CN113754115A (en) * | 2021-09-09 | 2021-12-07 | 深圳瑞赛环保科技有限公司 | Catalytic filler for PCB (printed Circuit Board) ink wastewater pretreatment, preparation method and treatment method and equipment |
| CN113754115B (en) * | 2021-09-09 | 2024-01-23 | 深圳瑞赛环保科技有限公司 | PCB (printed circuit board) ink wastewater pretreatment catalytic filler, preparation method and treatment method and equipment |
| CN114477351A (en) * | 2021-12-24 | 2022-05-13 | 鞍钢集团矿业有限公司 | Method for treating suspended matters in mineral processing wastewater |
| CN114314958A (en) * | 2022-01-11 | 2022-04-12 | 大庆市中良科技开发有限公司 | Pretreatment method for crude oil electric desalting high-concentration sewage of refinery |
| CN114314958B (en) * | 2022-01-11 | 2023-12-26 | 大庆市中良科技开发有限公司 | Pretreatment method for electric desalting high-concentration sewage of crude oil in refinery |
| CN116282741A (en) * | 2023-04-11 | 2023-06-23 | 江苏金桥油脂科技有限公司 | Treatment process of waste liquid from palm oil production |
| CN116282741B (en) * | 2023-04-11 | 2024-03-19 | 江苏金桥油脂科技有限公司 | Treatment process of waste liquid from palm oil production |
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