CN112340928A - Method for treating papermaking wastewater - Google Patents
Method for treating papermaking wastewater Download PDFInfo
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- CN112340928A CN112340928A CN202010260807.4A CN202010260807A CN112340928A CN 112340928 A CN112340928 A CN 112340928A CN 202010260807 A CN202010260807 A CN 202010260807A CN 112340928 A CN112340928 A CN 112340928A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention discloses a method for treating papermaking wastewater, which comprises the following steps: the first step is as follows: pretreating the waste water, namely introducing the papermaking waste water into a grid, and removing a larger part of fine fibers in the papermaking waste water by the grid; the second step is that: and adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, and adjusting the concentration of the papermaking wastewater. The invention removes larger impurities and scum in the papermaking wastewater by filtering, regulating the concentration and carrying out air flotation on the papermaking wastewater, the papermaking wastewater after the concentration regulation is easier to be treated by a subsequent process, then the papermaking wastewater is comprehensively treated by a physical chemical method, a chemical method and a biological method in multiple processes, so that the impurities and organic matters in the papermaking wastewater are comprehensively removed, finally, the treated papermaking wastewater is randomly selected and inspected in multiple batches, and the papermaking wastewater is discharged after the selection and inspection structure is qualified.
Description
Technical Field
The invention relates to the technical field of papermaking wastewater treatment, in particular to a method for treating papermaking wastewater.
Background
In China, straw, wood pulp and the like are mostly adopted as paper making raw materials. The pulping and papermaking production generally comprises the working procedures of pulping, pulp washing, bleaching and papermaking, the pulping in the papermaking industry comprises alkaline pulping, chemi-mechanical pulping and mechanical pulping, the waste water of the pulping industry is recovered according to different pulping methods, different raw materials, different pulping yields, different papermaking varieties and the existence of chemicals, the generation and discharge of pollutants are greatly different, but basically, the pollutants contain a large amount of suspended matters, BOD, COD and partial toxic substances, and the treatment is still carried out by adopting a mode of combining a physical-chemical method and a biological method.
The existing treatment methods can be divided into three types, namely a physical method, a chemical method and a biological method, and although the three treatment methods can carry out certain treatment on the papermaking wastewater, the treatment effect is not ideal and impurities and organic matters in the papermaking wastewater cannot be comprehensively removed.
Disclosure of Invention
The invention aims to provide a treatment method of papermaking wastewater, which has the advantages of adopting a plurality of treatment processes to comprehensively remove impurities and organic matters in the papermaking wastewater and solves the problems that the conventional treatment method of the papermaking wastewater is single in treatment process and cannot well remove the impurities and the organic matters in the papermaking wastewater.
In order to achieve the purpose, the invention provides the following technical scheme: a method for treating papermaking wastewater comprises the following steps:
the first step is as follows: pretreating the waste water, namely introducing the papermaking waste water into a grid, and removing a larger part of fine fibers in the papermaking waste water by the grid;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, and adjusting the concentration of the papermaking wastewater;
the third step: cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
Preferably, in the first step, still can filter papermaking waste water through structures such as filter screen to often clear up the filtrations on grid or the filter screen, in order to avoid causing the influence to the filtration of follow-up papermaking waste water.
Preferably, in the second step, the concentration of the papermaking wastewater is observed, water is introduced according to the concentration of the papermaking wastewater, and the concentration of the papermaking wastewater is adjusted, so that the concentration of the papermaking wastewater is convenient for the treatment of the subsequent steps.
Preferably, in the third step, the papermaking wastewater can be aerated through the air floatation device, so that light impurities in the papermaking wastewater are floated out, and the scum is convenient for workers to clean.
Preferably, in the fourth step, the impurities in the papermaking wastewater can be layered by a natural gravity settling method, and a flocculant is added to generate a complex with the organic matters in the papermaking wastewater so as to remove the organic matters in the papermaking wastewater.
Preferably, in the fourth step, the flocculating agent can be one of aluminum sulfate, basic aluminum chloride, ferrous sulfate and ferric chloride.
Preferably, in the fifth step, the chemical treatment method can also reduce and remove the chromaticity of the paper-making wastewater, and remove part of the biochemical oxygen consumption and suspended solids in the paper-making wastewater, and in the chemical treatment method, the pH value regulating agent is lime emulsion and plays a certain flocculation role.
Preferably, in the sixth step, the biological treatment method may further employ an activated sludge method and a biofilm method, in which scum may be pressed by a filter press and formed into a mud cake.
Preferably, in the seventh step, the treated papermaking wastewater is randomly sampled and inspected in multiple batches, and the papermaking wastewater is discharged after the sampling and inspecting structure is qualified.
Compared with the prior art, the invention has the following beneficial effects:
the invention removes larger impurities and scum in the papermaking wastewater by filtering, regulating the concentration and carrying out air flotation on the papermaking wastewater, the papermaking wastewater after the concentration regulation is easier to be treated by a subsequent process, then the papermaking wastewater is comprehensively treated by a physical chemical method, a chemical method and a biological method in multiple processes, so that the impurities and organic matters in the papermaking wastewater are comprehensively removed, finally, the treated papermaking wastewater is randomly selected and inspected in multiple batches, and the papermaking wastewater is discharged after the selection and inspection structure is qualified.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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.
A method for treating papermaking wastewater comprises the following steps:
the first step is as follows: pretreating the waste water, namely introducing the papermaking waste water into a grid, and removing a larger part of fine fibers in the papermaking waste water by the grid;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, and adjusting the concentration of the papermaking wastewater;
the third step: cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
The first embodiment is as follows:
a method for treating papermaking wastewater comprises the following steps:
the first step is as follows: the method comprises the following steps of (1) pretreating the waste water, namely introducing the papermaking waste water into a grid, removing a large part of fine fibers in the papermaking waste water by the grid, filtering the papermaking waste water by a filter screen and other structures, and often cleaning filtered matters on the grid or the filter screen so as to avoid influence on the subsequent filtration of the papermaking waste water;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, and adjusting the concentration of the papermaking wastewater;
the third step: cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
Example two:
a method for treating papermaking wastewater comprises the following steps:
the first step is as follows: the method comprises the following steps of (1) pretreating the waste water, namely introducing the papermaking waste water into a grid, removing a large part of fine fibers in the papermaking waste water by the grid, filtering the papermaking waste water by a filter screen and other structures, and often cleaning filtered matters on the grid or the filter screen so as to avoid influence on the subsequent filtration of the papermaking waste water;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, adjusting the concentration of the papermaking wastewater, observing the concentration of the papermaking wastewater, introducing water according to the concentration of the papermaking wastewater, and adjusting the concentration of the papermaking wastewater so that the concentration of the papermaking wastewater is convenient for the treatment of the subsequent steps;
the third step: cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
Example three:
a method for treating papermaking wastewater comprises the following steps:
the first step is as follows: the method comprises the following steps of (1) pretreating the waste water, namely introducing the papermaking waste water into a grid, removing a large part of fine fibers in the papermaking waste water by the grid, filtering the papermaking waste water by a filter screen and other structures, and often cleaning filtered matters on the grid or the filter screen so as to avoid influence on the subsequent filtration of the papermaking waste water;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, adjusting the concentration of the papermaking wastewater, observing the concentration of the papermaking wastewater, introducing water according to the concentration of the papermaking wastewater, and adjusting the concentration of the papermaking wastewater so that the concentration of the papermaking wastewater is convenient for the treatment of the subsequent steps;
the third step: the method comprises the following steps of cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues, and the papermaking waste water can be ventilated through an air floatation device to float out light impurities in the papermaking waste water, so that workers can clean the scum conveniently;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
Example four:
a method for treating papermaking wastewater comprises the following steps:
the first step is as follows: the method comprises the following steps of (1) pretreating the waste water, namely introducing the papermaking waste water into a grid, removing a large part of fine fibers in the papermaking waste water by the grid, filtering the papermaking waste water by a filter screen and other structures, and often cleaning filtered matters on the grid or the filter screen so as to avoid influence on the subsequent filtration of the papermaking waste water;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, adjusting the concentration of the papermaking wastewater, observing the concentration of the papermaking wastewater, introducing water according to the concentration of the papermaking wastewater, and adjusting the concentration of the papermaking wastewater so that the concentration of the papermaking wastewater is convenient for the treatment of the subsequent steps;
the third step: the method comprises the following steps of cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues, and the papermaking waste water can be ventilated through an air floatation device to float out light impurities in the papermaking waste water, so that workers can clean the scum conveniently;
the fourth step: a physical and chemical treatment method of waste water comprises the steps of placing a centrifugal separator above a water tank, centrifugally stirring the papermaking waste water in the water tank, adding a flocculating agent in the centrifugal stirring process, layering impurities in the papermaking waste water by a natural gravity settling method, adding the flocculating agent to generate a complex with organic matters in the papermaking waste water, and removing the organic matters in the papermaking waste water, wherein the flocculating agent can be one of aluminum sulfate, basic aluminum chloride, ferrous sulfate and ferric chloride;
the fifth step: a chemical treatment method of waste water is characterized in that a chemical reagent is added into a water pool according to the pH value of the papermaking waste water, the pH value of the waste water is adjusted, the chemical treatment method can also reduce and remove the chroma of the papermaking waste water, and remove part of biochemical oxygen consumption and solid suspended matters in the papermaking waste water, and in the chemical treatment method, the pH value adjusting reagent is lime emulsion and plays a certain flocculation role;
and a sixth step: the biological treatment method of the waste water, continuously introduce the air into the paper-making waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter the paper-making waste water, the biological treatment method can also adopt activated sludge process and biomembrane method, the scum can be squeezed through the filter press in its course, and form the mud cake;
the seventh step: the wastewater is discharged after reaching the standard, the pH value of the wastewater and organic matters in the wastewater are measured and detected, the wastewater is discharged after reaching the standard, the treated papermaking wastewater is randomly selected and inspected in multiple batches, and the papermaking wastewater is discharged after the selection and inspection structure is qualified.
The specific operation steps are as follows:
the method comprises the steps of filtering papermaking wastewater through a grid, then introducing the filtered papermaking wastewater into a water tank, then introducing water into the water tank, adjusting the concentration of the papermaking wastewater, introducing the papermaking wastewater through an air flotation device, so that scum floats out of the water surface, then performing centrifugal operation on the papermaking wastewater through a centrifugal separator, adding a flocculating agent in a centrifugal process, reacting with organic matters in the papermaking wastewater, then adjusting the pH value of the papermaking wastewater, further adjusting the pH value of the papermaking wastewater, then introducing air into the water tank, generating aerobes, comprehensively removing the organic matters in the papermaking wastewater, finally performing multi-batch random sampling on the treated papermaking wastewater, and discharging the papermaking wastewater after sampling structure is qualified.
The invention removes larger impurities and scum in the papermaking wastewater by filtering, regulating the concentration and carrying out air flotation on the papermaking wastewater, the papermaking wastewater after the concentration regulation is easier to be treated by a subsequent process, then the papermaking wastewater is comprehensively treated by a physical chemical method, a chemical method and a biological method in multiple processes, so that the impurities and organic matters in the papermaking wastewater are comprehensively removed, finally, the treated papermaking wastewater is randomly selected and inspected in multiple batches, and the papermaking wastewater is discharged after the selection and inspection structure is qualified.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A method for treating papermaking wastewater is characterized by comprising the following steps: the method comprises the following steps:
the first step is as follows: pretreating the waste water, namely introducing the papermaking waste water into a grid, and removing a larger part of fine fibers in the papermaking waste water by the grid;
the second step is that: adjusting the concentration of the wastewater, namely guiding the filtered papermaking wastewater into a water tank, introducing water into the water tank, and adjusting the concentration of the papermaking wastewater;
the third step: cleaning the scum of the waste water, wherein after the concentration of the papermaking waste water is adjusted, light residues in the papermaking waste water can float out to clean the light residues;
the fourth step: the physical and chemical waste water treating process includes setting centrifugal separator over water tank, centrifugally stirring the papermaking waste water in the water tank and adding flocculant during the centrifugal stirring;
the fifth step: the chemical treatment method of the waste water, add chemical reagent in the pond according to the pH value of the paper-making waste water, regulate the ph of the waste water;
and a sixth step: the biological treatment method of the waste water, continuously let air into papermaking waste water, utilize oxygen to produce a large amount of aerobic microorganisms, then filter papermaking waste water;
the seventh step: and (4) discharging the wastewater after reaching the standard by measuring and detecting the pH value of the wastewater and the organic matters in the wastewater, and discharging the wastewater after reaching the standard.
2. The method for treating papermaking wastewater according to claim 1, wherein: in the first step, still can filter papermaking waste water through structures such as filter screen to often clear up the filtrations on grid or the filter screen, in order to avoid causing the influence to the filtration of follow-up papermaking waste water.
3. The method for treating papermaking wastewater according to claim 1, wherein: and in the second step, the concentration of the papermaking wastewater is observed, water is introduced according to the concentration of the papermaking wastewater, and the concentration of the papermaking wastewater is adjusted, so that the concentration of the papermaking wastewater is convenient for the treatment of the subsequent steps.
4. The method for treating papermaking wastewater according to claim 1, wherein: in the third step, the papermaking wastewater can be aerated through the air floatation device, so that light impurities in the papermaking wastewater are floated out, and the scum is convenient for workers to clean.
5. The method for treating papermaking wastewater according to claim 1, wherein: in the fourth step, the impurities in the papermaking wastewater can be layered by a natural gravity settling method, and a flocculating agent is added to generate a complex with the organic matters in the papermaking wastewater so as to remove the organic matters in the papermaking wastewater.
6. The method for treating papermaking wastewater according to claim 1, wherein: in the fourth step, the flocculating agent can be one of aluminum sulfate, basic aluminum chloride, ferrous sulfate and ferric chloride.
7. The method for treating papermaking wastewater according to claim 1, wherein: in the fifth step, the chemical treatment method can also reduce and remove the chroma of the paper-making wastewater and remove part of the biochemical oxygen consumption and solid suspended matters in the paper-making wastewater, and in the chemical treatment method, the pH value regulating reagent is lime emulsion and plays a certain flocculation role.
8. The method for treating papermaking wastewater according to claim 1, wherein: in the sixth step, the biological treatment method can also adopt an activated sludge method and a biofilm method, and scum can be extruded by a filter press to form a mud cake.
9. The method for treating papermaking wastewater according to claim 1, wherein: and in the seventh step, performing multi-batch random sampling inspection on the treated papermaking wastewater, and discharging the papermaking wastewater after the sampling inspection structure is qualified.
10. The method for treating papermaking wastewater according to claim 1, wherein: the specific operation steps are as follows:
the method comprises the steps of filtering papermaking wastewater through a grid, then introducing the filtered papermaking wastewater into a water tank, then introducing water into the water tank, adjusting the concentration of the papermaking wastewater, introducing the papermaking wastewater through an air flotation device, so that scum floats out of the water surface, then performing centrifugal operation on the papermaking wastewater through a centrifugal separator, adding a flocculating agent in a centrifugal process, reacting with organic matters in the papermaking wastewater, then adjusting the pH value of the papermaking wastewater, further adjusting the pH value of the papermaking wastewater, then introducing air into the water tank, generating aerobes, comprehensively removing the organic matters in the papermaking wastewater, finally performing multi-batch random sampling on the treated papermaking wastewater, and discharging the papermaking wastewater after sampling structure is qualified.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125696A (en) * | 1995-09-14 | 1996-07-03 | 王钦静 | Treatment and circulating reuse method for paper-making waste water |
| CN103466884A (en) * | 2013-09-12 | 2013-12-25 | 安徽省绿巨人环境技术有限公司 | Process for treating waste paper pulping and papermaking waste water |
| CN104310720A (en) * | 2014-11-12 | 2015-01-28 | 福建农正鸿发纸业有限责任公司 | Method for treating paper-making wastewater |
| CN104445803A (en) * | 2014-10-24 | 2015-03-25 | 无锡科莱欣机电制造有限公司 | Printing and dyeing wastewater treatment system |
| US20190024309A1 (en) * | 2017-02-21 | 2019-01-24 | Lakehead University | Use of Fly Ash in Biological Process of Wastewater Treatment Systems |
-
2020
- 2020-04-03 CN CN202010260807.4A patent/CN112340928A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1125696A (en) * | 1995-09-14 | 1996-07-03 | 王钦静 | Treatment and circulating reuse method for paper-making waste water |
| CN103466884A (en) * | 2013-09-12 | 2013-12-25 | 安徽省绿巨人环境技术有限公司 | Process for treating waste paper pulping and papermaking waste water |
| CN104445803A (en) * | 2014-10-24 | 2015-03-25 | 无锡科莱欣机电制造有限公司 | Printing and dyeing wastewater treatment system |
| CN104310720A (en) * | 2014-11-12 | 2015-01-28 | 福建农正鸿发纸业有限责任公司 | Method for treating paper-making wastewater |
| US20190024309A1 (en) * | 2017-02-21 | 2019-01-24 | Lakehead University | Use of Fly Ash in Biological Process of Wastewater Treatment Systems |
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