CN114538587A - Treatment method of water washing resin wastewater - Google Patents
Treatment method of water washing resin wastewater Download PDFInfo
- Publication number
- CN114538587A CN114538587A CN202210049057.5A CN202210049057A CN114538587A CN 114538587 A CN114538587 A CN 114538587A CN 202210049057 A CN202210049057 A CN 202210049057A CN 114538587 A CN114538587 A CN 114538587A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- polyacrylamide
- diatomite
- washing
- flocculation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to a method for treating resin washing wastewater, which comprises the following steps: pretreating the wastewater; mixing active diatomite with the pretreated wastewater to disperse the active diatomite in the wastewater; carrying out flocculation treatment on the wastewater dispersed with the active diatomite by using an inorganic flocculant; and (4) carrying out flocculation and sedimentation treatment on the wastewater after the flocculation treatment by adopting an organic flocculant. According to the invention, the active diatomite is added to participate in the flocculation process, so that the collision probability of flocculation nucleuses can be effectively increased, the flocculation effect is improved, and the COD value in the wastewater containing the resins with different concentrations is effectively reduced, thereby realizing the purification of the wastewater containing the resins with different concentrations.
Description
Technical Field
The invention relates to the technical field of 3D printing, in particular to a method for treating water washing resin wastewater.
Background
With the continuous development of additive manufacturing technology, especially the rapid development of desktop level photo-curing technology, the disadvantages of traditional solvents, such as ethanol, isopropanol or other organic solvents, cleaning the printed model become more and more prominent. On the one hand, ethanol and isopropanol, as medical supplies, have been increasingly difficult to purchase since outbreaks. On the other hand, in the environment of a home or a working room, a solvent used as a cleaning agent has certain odor and potential safety hazard. With the increasing printing size of desktop level photocuring printers, the demand of cleaning the model to the solvent is increasing, resulting in the increase of 3D printing cost.
The model printed by washing the photosensitive resin can be directly washed by water without using an organic solvent, so that the defect that the organic solvent is used as a cleaning agent at present can be avoided. However, because the water-washing photosensitive resin is composed of a photosensitizer, a monomer, an oligomer and an auxiliary agent, after the model printing is finished, part of the liquid resin adhered to the surface of the model can be washed together and dissolved in water to form a wastewater mixture, and the washed wastewater is directly discharged into the environment, so that the problem of certain environmental hazard exists.
In the wastewater mixture for washing the photosensitive resin, organic pollutants are main pollutants, the organic pollutants mainly comprise water-soluble organic matters, and part of the water-soluble organic matters contain oil-soluble organic matters, so that the pollutants in the wastewater are mainly organic pollutants with low molecular weight.
How to reduce the above-mentioned contaminants in the photosensitive resin is a difficulty in purifying the waste water from washing the photosensitive resin with water.
Disclosure of Invention
In order to solve the above problems, a first object of the present invention is to provide a method for treating resin wastewater from water washing, comprising: pretreating the wastewater; mixing active diatomite with the pretreated wastewater to disperse the active diatomite in the wastewater; carrying out flocculation treatment on the wastewater dispersed with the active diatomite by using an inorganic flocculant; and carrying out flocculation and sedimentation treatment on the wastewater after the flocculation treatment by adopting an organic flocculant so as to solve the purification problem of the photosensitive resin wastewater after washing.
In one implementation mode of the invention, the mass ratio of the active diatomite to the wastewater is (0.1-0.2): 100.
in one embodiment of the present invention, the particle size of the activated diatomaceous earth is 74 to 150 μm.
In one implementation mode of the invention, the active diatomite is prepared by the following method:
mixing diatomite and a hydrochloric acid solution, adding activated carbon, performing ultrasonic oscillation, performing solid-liquid separation, washing solid components to be neutral, drying, sequentially calcining, grinding and sieving to obtain the active diatomite.
In one implementation mode of the invention, the active carbon accounts for 5-8% of the mass of the active diatomite; and/or
The concentration of the hydrochloric acid solution is 2.5-4 mol/L, and the mass of the hydrochloric acid solution is 2-3 times of the sum of the masses of the diatomite and the activated carbon; and/or
The calcination temperature is 400-500 ℃, and the calcination time is 2-3 h.
In one implementation mode of the invention, the mass ratio of the inorganic flocculant to the wastewater is (1.0-2.0): 100.
in one implementation of the invention, the inorganic flocculant comprises at least one of polyaluminum chloride, polyferric chloride, polyaluminum sulfate and polyferric sulfate.
In one implementation mode of the invention, the mass ratio of the organic flocculant to the wastewater is (5-10): 100.
in one implementation mode of the invention, the organic flocculant contains polyacrylamide, and the mass ratio of the polyacrylamide to the wastewater is (0.0001-0.0003): 100.
in one implementation of the invention, the polyacrylamide comprises at least one of a non-ionic polyacrylamide, a cationic polyacrylamide, an anionic polyacrylamide and an amphoteric polyacrylamide.
In one embodiment of the present invention, the pretreatment is to adjust the pH of the wastewater to 7.0 to 8.5 by a pH adjuster.
In one implementation of the invention, the pH adjusting agent comprises at least one of sodium carbonate and sodium bicarbonate.
In one implementation mode of the invention, the mass percent of the resin in the wastewater is 1-5%.
According to the treatment method of the water washing resin wastewater, the active diatomite dispersed in the wastewater is used as the core of the flocculating nucleus body to participate in the flocculation process, and the inorganic and organic flocculating agents are used in a matching manner, so that the size of the flocculating nucleus body can be controlled, the collision probability of the flocculating nucleus body is effectively increased, the flocculation effect is improved, the COD value of the wastewater containing different resin concentrations can be effectively reduced, and the purification of the wastewater containing different resin concentrations is realized.
Detailed Description
Reference will now be made in detail to embodiments of the invention, one or more examples of which are described below. Each example is provided by way of explanation, not limitation, of the invention. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used on another embodiment to yield a still further embodiment.
It is therefore intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. Other objects, features and aspects of the present invention are disclosed in or are apparent from the following detailed description. It is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only, and is not intended as limiting the broader aspects of the present invention.
The waste water of washing photosensitive resin is the waste water of the mixture of organic pollutants and inorganic pollutants, wherein, the organic pollutants comprise epoxy resin (and the modification thereof), acrylate oligomer (and the modification thereof), acrylate monomer, vinyl monomer (and the modification thereof), organic pigment, organic dye and initiator with photoinitiation effect and the like which can be cured by UV. Wherein the initiator is one or more of benzoin and derivatives thereof, benzil, alkylbenzene ketones, acyl phosphorus oxide, thioxanthone, sulfonium salts and iodonium salts. The inorganic pollutant is usually one or more of nanometer titanium dioxide and its dispersion, nanometer silicon dioxide, nanometer zinc oxide, nanometer calcium carbonate, etc.
Because the washing photosensitive resin waste water has the condition that the component proportion is different, the resin concentration is different, the photosensitive resin waste water appears easily in the purification washing: when the concentration of the resin is lower, the effective collision of flocculating nuclei is insufficient, so that the problems of low nucleation speed, small volume, low density, low removal efficiency and uncontrollable purification effect are caused; and the flocculation nucleuses are frequently collided effectively when the resin concentration is higher, the growth speed is higher, premature sedimentation occurs, the flocculation nucleuses cannot grow continuously, and instead, the problem of waste caused by repeatedly adding medicaments is solved.
In practical application, because the resin residues adhered to printed objects are different due to different sizes of the printed objects every time, and the frequency of cleaning operation is different, the problem that the purification effect is influenced because the addition amount of the flocculating agent cannot be quantitatively controlled due to the fact that the specific concentration of the resin in the wastewater cannot be determined when the photosensitive resin wastewater is purified and washed exists.
In order to at least partially solve at least one of the above technical problems, a first aspect of the present invention provides a method for treating resin wastewater for water washing, comprising: pretreating the wastewater; mixing active diatomite with the pretreated wastewater to disperse the active diatomite in the wastewater; carrying out flocculation treatment on the wastewater dispersed with the active diatomite by using an inorganic flocculant; the wastewater after flocculation treatment is subjected to flocculation sedimentation treatment by adopting an organic flocculant, wherein the active diatomite has the function of forming uniformly distributed reticular suspension in the wastewater, the chromaticity of the wastewater can be reduced due to the large specific surface area and a large number of multistage pore structures of the active diatomite and certain electropositivity of the whole particles, part of pollutants can be directly adsorbed by the active diatomite through electrostatic adsorption during dispersion treatment, and a small amount of pollutants are attracted to the surface of diatomite particles due to the potential effect to form a flocculation core taking the active diatomite as the core and continue to grow as the initial flocculation core, wherein the size and the growth speed of the flocculation core are controlled after the inorganic flocculant is added in the later period by controlling the particle size of the active diatomite and the stirring speed in the dispersion process to a certain extent, the effective collision efficiency of flocculating nucleuses can be controlled after inorganic flocculant is added at the later stage by controlling the addition amount of the active diatomite in the active diatomite dispersing process; further, after the inorganic polymeric flocculant is added, the inorganic polymeric flocculant can be hydrolyzed into a large amount of complex ions and positively charged colloids in water, the positively charged colloids adsorb pollutant microdrops and are neutralized electrically to lose stability so as to be favorable for sedimentation, and the inorganic polymeric flocculant can continue to grow on the basis of flocculating nucleuses taking the active diatomite particles as cores under the stirring action, so that the volume of the flocculating nucleuses is increased, and the sedimentation of the flocculating nucleuses is favorable; further through lasting stirring collision, the flocculation core body can grow up according to certain speed, through control dispersion stirring speed, can improve the probability that the effective collision of flocculation core body, and then improves the flocculation sedimentation effect to organic pollutant in the waste water.
In some embodiments, the size of the particle size of the active diatomite affects the growth of the flocculating core body, which has an important influence on the wastewater treatment effect, the particle size of the active diatomite is 74-150 μm, and the aim is to control the particle size of the active diatomite within a certain range, so that the growth speed of the flocculating core body is as consistent as possible when organic matters and colloids are dispersedly adsorbed, the flocculating core body is synchronously settled, meanwhile, the adhesion of the flocculating core body is improved, the inner part of the flocculating core body is tighter, and the weight of the flocculating core body is increased.
In some embodiments, the resin in the wastewater refers to a photosensitive resin used for 3D printing models, the wastewater refers to wastewater generated after cleaning the 3D printing models, the mass percentage of the photosensitive resin in the wastewater is 1% to 5%, specifically, 2% or 3%, and for wastewater containing photosensitive resins with different concentrations, the collision efficiency of flocculating nuclei can be regulated and controlled through the composite action of active diatomite and inorganic and organic flocculants, so that the flocculation effect of organic pollutants in the wastewater is increased.
In some embodiments, pretreatment refers to adjusting the pH of wastewater to 7.0-8.5 by a pH adjusting agent so that the flocculant performs optimal flocculation or sedimentation.
In some embodiments, the pH adjusting agent comprises at least one of sodium carbonate and sodium bicarbonate, and is non-toxic, non-hazardous, and non-polluting to the environment.
In some embodiments, in order to achieve better flocculation effect, the mass ratio of the active diatomite to the wastewater is (0.1-0.2): 100, in particular, can be 0.15: 100, through the input of control activity diatomaceous earth, can realize carrying out effective flocculation to the organic pollutant of different concentrations in the resin wastewater of washing, improve the flocculation effect of pollutant in the waste water.
In some embodiments, the activated diatomaceous earth is prepared by:
mixing diatomite and a hydrochloric acid solution, adding activated carbon, performing ultrasonic oscillation, performing solid-liquid separation, washing solid components to be neutral, drying, sequentially calcining, grinding and sieving to obtain the active diatomite.
Specifically, the hydrochloric acid solution is added to remove and modify impurities blocking the microporous structures of the diatomite and the activated carbon, so that the surface hydroxyl groups are protonated and positively charged, the electrostatic adsorption force and the positive electricity of the particle surface are increased, potential pairing with pollutants is facilitated, and the integral Zeta potential absolute value of the wastewater is reduced.
In some embodiments, the concentration of the hydrochloric acid solution is 2.5-4 mol/L, and the mass of the hydrochloric acid solution is 2-3 times of the sum of the masses of the diatomite and the activated carbon.
Furthermore, the added active carbon can not only increase the adsorption capacity of the diatomite, but also be beneficial to improving the heat resistance of the diatomite, and can ensure that the diatomite keeps the stability of the microporous structure at the temperature of more than 400 ℃ and the structure is not damaged in a large scale after being heated.
In some specific embodiments, the activated carbon accounts for 5-8% of the mass of the activated diatomite, the calcining temperature is 400-500 ℃, and the calcining time is 2-3 hours.
In some embodiments, the inorganic flocculant comprises at least one of polyaluminium chloride, polyferric chloride, polyaluminium sulfate and polyferric sulfate, and in addition to the function of using the active diatomite as a flocculation core to perform flocculation core growth, the inorganic flocculant can also generate adsorption bridging action through electrostatic attraction, van der waals force, hydrogen bonds and the like to gradually connect adjacent flocculation cores into a larger whole, so that the flocculation cores are settled under the action of gravity. .
In some specific embodiments, the mass ratio of the inorganic flocculant to the wastewater is (1.0-2.0): 100, and further may be (0.015 to 2.0): 100, so as to improve the collision probability of the flocculating nucleuses and achieve better flocculation effect.
In some embodiments, the organic flocculant comprises polyacrylamide, and specifically, the organic flocculant is added into the wastewater in the form of a polyacrylamide solution, and the polyacrylamide performs adsorption bridging and net catching effects on residual pollutant molecular droplets and micelles by virtue of the bulky molecular structure of the polyacrylamide, so that flocculation and sedimentation of flocculation nuclei into sludge are completed.
In some embodiments, the polyacrylamide accounts for 0.02-0.04% of the mass of the polyacrylamide solution, and is used as an organic flocculant, and the polyacrylamide can be added into the wastewater to settle flocculates, so that the purification of organic matters in the wastewater is realized.
In some embodiments, the polyacrylamide solution comprises 5-10% of the total mass of the wastewater to achieve better settling of the flocs formed by the addition of the activated diatomaceous earth and the inorganic flocculant.
In some embodiments, the polyacrylamide comprises at least one of a non-ionic polyacrylamide, a cationic polyacrylamide, an anionic polyacrylamide, and an amphoteric polyacrylamide.
In some specific embodiments, the content of acrylamide in the polyacrylamide is less than 0.05%, the amount of the residual acrylamide in the treated water is less than 0.05% (drinking water treatment standard), and the polyacrylamide accounts for about 0.0001% to 0.0003% of the total system, and the AM monomer (acrylamide) can be metabolized in time without harm to the environment through physical, biological and photochemical degradation of the natural environment.
Embodiments of the present invention will be described in detail with reference to examples.
Example 1
This embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse is in the waste water, further adopts polyaluminium chloride to carry out flocculation treatment to the washing photosensitive resin waste water that has dispersed active diatomaceous earth, adopts anionic polyacrylamide to carry out the flocculation and sedimentation treatment as organic flocculant to the waste water after the flocculation treatment again, and concrete processing method includes following step: preparation of activated diatomaceous earth: taking 100g of diatomite, adding 5g of activated carbon powder, adding 200g of hydrochloric acid solution with the concentration of 2.0mol, ultrasonically vibrating for 6 hours, washing to be neutral, and drying. Calcining at 450 deg.C for 2 hr, cooling to room temperature, grinding, and sieving with 100 mesh sieve to obtain activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a fixed quantitative speed to prepare a polyacrylamide solution, wherein the polyacrylamide is anionic polyacrylamide in parts by mass, the dosage of the polyacrylamide is 0.02 percent of the total amount of the polyacrylamide solution, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a drawing wire.
A wastewater treatment step: 100g of the photosensitive resin wastewater mixture is taken, wherein the mass ratio of the resin is 1.0%. Sodium bicarbonate was added to adjust the pH to 7.5. 0.1g of activated diatomaceous earth was added, and the mixture was dispersed with stirring at 100rpm for 1 minute. 1.0g of polyaluminum chloride was added thereto, and the mixture was stirred and dispersed for 3 minutes at a stirring speed of 500 rpm. And adding a polyacrylamide solution, adding 5 mass parts of the wastewater mixture, stirring at the speed of 100rpm for 5 minutes, and standing and settling for 60 minutes. Taking clear liquid for determination. The pH value of the treated wastewater is 7.5, and the COD value is 40% of that of the untreated wastewater.
Example 2
This embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse in washing photosensitive resin waste water, further adopts polymeric ferric chloride to carry out flocculation treatment to the washing photosensitive resin waste water that disperses active diatomaceous earth, adopts anion type polyacrylamide as organic flocculant to carry out flocculation sedimentation treatment to the waste water after flocculation treatment, and concrete processing method includes the following step:
preparation of activated diatomaceous earth: taking 100g of diatomite, adding 5g of activated carbon powder, adding 200g of hydrochloric acid solution with the concentration of 3.5mol, ultrasonically vibrating for 6 hours, washing to be neutral, and drying. Calcining at 400 ℃ for 2 hours, cooling to room temperature, grinding, and sieving with a 120-mesh sieve to obtain the activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative constant speed to prepare a polyacrylamide solution, wherein the polyacrylamide is anionic polyacrylamide, the dosage of the polyacrylamide is 0.01 percent of the total amount of the polyacrylamide solution in parts by mass, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of the photosensitive resin wastewater mixture is taken, wherein the mass ratio of the resin is 2.0%. Sodium carbonate was added to adjust the pH to 8.0. 0.15g of activated diatomaceous earth was added thereto, and the mixture was dispersed for 1 minute with stirring at 120 rpm. 1.0g of polyferric chloride was added thereto and dispersed for 3 minutes with stirring at 550 rpm. And adding a polyacrylamide solution, adding 5 mass parts of the wastewater mixture, stirring at 80rpm for 5 minutes, and standing and settling for 60 minutes. Taking the clear liquid for determination. The pH value of the treated wastewater is 8.0, and the COD value is 45% of that of the untreated wastewater.
Example 3
The embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse is in washing photosensitive resin waste water, further adopts polyaluminium sulfate to carry out flocculation treatment to the washing photosensitive resin waste water that has dispersed active diatomaceous earth, adopts cationic polyacrylamide as organic flocculant to carry out settlement treatment to the waste water after flocculation treatment, and concrete processing method includes the following step:
preparation of activated diatomaceous earth: taking 100g of diatomite, adding 8g of activated carbon powder, adding 220g of hydrochloric acid solution with the concentration of 4.0mol, ultrasonically oscillating for 6 hours, washing to be neutral, and drying. Calcining at 500 deg.C for 2 hr, cooling to room temperature, grinding, and sieving with 200 mesh sieve to obtain activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative fixed speed to prepare a polyacrylamide solution, wherein the polyacrylamide is cationic polyacrylamide, the dosage of the polyacrylamide is 0.015 percent of the total amount of the polyacrylamide solution in parts by mass, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of a high-concentration water-washing photosensitive resin wastewater mixture was taken, wherein the mass ratio of the resin was 5.0%. Sodium bicarbonate was added to adjust the pH to 9.0. 0.15g of activated diatomaceous earth was added thereto, and the mixture was dispersed for 1 minute with stirring at 100 rpm. 1.0g of polyaluminium sulfate was added thereto, and the mixture was stirred and dispersed for 3 minutes at a stirring speed of 500 rpm. And adding a polyacrylamide solution, adding 8 mass parts of the wastewater mixture, stirring at 50rpm for 5 minutes, and standing and settling for 60 minutes. Taking the clear liquid for determination. The pH value of the treated wastewater is 9.0, and the COD value is 49% of that of the untreated wastewater.
Example 4
This embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse is in washing photosensitive waste water, further adopts polyferric sulfate to carry out flocculation treatment to the washing photosensitive resin waste water that has dispersed active diatomaceous earth, adopts non-ionic type polyacrylamide to carry out the flocculation and sedimentation treatment as organic flocculant to the waste water after the flocculation treatment again, and concrete processing method includes following step:
preparation of activated diatomaceous earth: taking 100g of diatomite, adding 5g of activated carbon powder, adding 200g of hydrochloric acid solution with the concentration of 2.5mol, ultrasonically vibrating for 6 hours, washing to be neutral, and drying. Calcining at 450 deg.C for 2 hr, cooling to room temperature, grinding, and sieving with 200 mesh sieve to obtain activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative constant speed to prepare a polyacrylamide solution, wherein the polyacrylamide is nonionic polyacrylamide, the dosage of the polyacrylamide is 0.02 percent of the total amount of the polyacrylamide solution in parts by mass, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of the photosensitive resin wastewater mixture is taken, wherein the mass ratio of the resin is 2.0%. Sodium carbonate was added to adjust the pH to 8.5. 0.15g of activated diatomaceous earth was added thereto, and the mixture was dispersed for 1 minute with stirring at 150 rpm. 1.0g of polyferric sulfate was added, stirred and dispersed for 3 minutes at a stirring speed of 600 rpm. And adding a polyacrylamide solution, adding 10 mass parts of the wastewater mixture, stirring at the speed of 150rpm for 3 minutes, and standing and settling for 60 minutes. Taking the clear liquid for determination. The pH value of the treated wastewater is 8.5, and the COD value is 56% of that of the untreated wastewater.
Example 5
This embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse is in washing photosensitive waste water, further adopts polyaluminium chloride to carry out flocculation treatment to the washing photosensitive resin waste water that has dispersed active diatomaceous earth, adopts amphoteric polyacrylamide to carry out flocculation and sedimentation treatment as organic flocculant to the waste water after the flocculation treatment again, and concrete processing method includes following step:
preparation of activated diatomaceous earth: taking 100g of diatomite, adding 5g of activated carbon powder, adding 250g of hydrochloric acid solution with the concentration of 3.5mol, ultrasonically vibrating for 6 hours, washing to be neutral, and drying. Calcining at 400 ℃ for 2 hours, cooling to room temperature, grinding, and sieving with a 150-mesh sieve to obtain the activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative constant speed to prepare a polyacrylamide solution, wherein the polyacrylamide is amphoteric polyacrylamide, the dosage of the polyacrylamide is 0.015 percent of the total amount of the polyacrylamide solution in parts by weight, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of the photosensitive resin wastewater mixture is taken, wherein the mass ratio of the resin is 2.0%. Sodium carbonate was added to adjust the pH to 7.0. 0.12g of activated diatomaceous earth was added thereto, and the mixture was dispersed for 1 minute with stirring at 180 rpm. 1.0g of polyaluminum chloride was added thereto, and the mixture was stirred and dispersed for 3 minutes at a stirring speed of 500 rpm. And adding a polyacrylamide solution, adding 5 mass parts of the wastewater mixture, stirring at the speed of 150rpm for 3 minutes, and standing and settling for 60 minutes. Taking the clear liquid for determination. The pH value of the treated wastewater is 7.0, and the COD value is 52% of that of the untreated wastewater.
Example 6
This embodiment adopts active diatomaceous earth and washing photosensitive resin waste water to mix for active diatomaceous earth homodisperse is in washing photosensitive waste water, further adopts polyaluminium chloride to carry out flocculation treatment to the washing photosensitive resin waste water that has dispersed active diatomaceous earth, adopts amphoteric polyacrylamide to subside the processing as organic flocculant to the waste water after flocculation treatment again, and concrete processing method includes following step:
preparation of activated diatomaceous earth: taking 100g of diatomite, adding 8g of activated carbon powder, adding 200g of hydrochloric acid solution with the concentration of 3.5mol, ultrasonically vibrating for 6 hours, washing to be neutral, and drying. Calcining at 500 deg.C for 2 hr, cooling to room temperature, grinding, and sieving with 200 mesh sieve to obtain activated diatomite.
Preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative constant speed to prepare a polyacrylamide solution, wherein the polyacrylamide is anionic polyacrylamide, the dosage of the polyacrylamide is 0.02 percent of the total amount of the polyacrylamide solution in parts by mass, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of a high-concentration water-washing photosensitive resin wastewater mixture was taken, wherein the mass ratio of the resin was 5.0%. Sodium bicarbonate was added to adjust the pH to 7.5. 0.15g of activated diatomaceous earth was added thereto, and the mixture was dispersed for 1 minute with stirring at 200 rpm. 1.0g of polyferric chloride was added thereto and dispersed for 3 minutes with stirring at 550 rpm. And adding a polyacrylamide solution, adding 8 mass parts of the wastewater mixture, stirring at 80rpm for 3 minutes, and standing and settling for 60 minutes. Taking clear liquid for determination. The pH value of the treated wastewater is 7.5, and the COD value is 58% of that of the untreated wastewater.
Comparative example 1
The comparative example adopts polyaluminium chloride to carry out flocculation treatment on the water-washed photosensitive resin wastewater, and then adopts anionic polyacrylamide as an organic flocculant to carry out flocculation sedimentation treatment on the wastewater after the flocculation treatment, and the specific treatment method comprises the following steps:
preparing a polyacrylamide solution: taking quantitative purified water, stirring at a quantitative constant speed to prepare a polyacrylamide solution, wherein the polyacrylamide is anionic polyacrylamide, the dosage of the polyacrylamide is 0.02 percent of the total amount of the polyacrylamide solution in parts by mass, the stirring speed is 150-200rpm, and the stirring time is 30-60 minutes until the polyacrylamide is completely dissolved in water to form a wiredrawing shape.
A wastewater treatment step: 100g of the photosensitive resin wastewater mixture is taken, wherein the mass ratio of the resin is 1.0%. Sodium bicarbonate was added to adjust the pH to 7.5. 1.0g of polyaluminum chloride was added thereto, and the mixture was stirred and dispersed for 3 minutes at a stirring speed of 500 rpm. And adding a polyacrylamide solution, adding 5 mass parts of the wastewater mixture, stirring at the speed of 100rpm for 5 minutes, and standing and settling for 60 minutes. Taking the clear liquid for determination. The pH value of the treated wastewater is 7.5, and the COD value is 69 percent of that of the untreated wastewater.
Comparative example 2
The mass ratio of the resin in comparative example 1 was adjusted to 3.0%, and the others were not changed. The pH value of the treated wastewater is 7.5, and the COD value is 72 percent of that of the untreated wastewater.
Comparative example 3
The mass ratio of the resin in comparative example 1 was adjusted to 5.0%, and the others were not changed. The pH value of the treated wastewater is 7.5, and the COD value is 85% of that of the untreated wastewater.
According to the embodiments 1 to 6, the invention can effectively regulate and control the flocculation speed of the organic pollutants in the resin wastewater with different concentrations through the composite action of the active diatomite and the inorganic flocculant, can effectively flocculate and settle the organic pollutants in the water-washing photosensitive resin wastewater with different concentrations, has high flocculation efficiency, does not need to input the flocculant for multiple times, and can effectively reduce the COD value in the wastewater to 40 to 58 percent of that of untreated water. In comparative examples 1 to 3, the COD value in the wastewater is still more than 69% of that in the untreated wastewater, which is obtained by treating the wastewater containing the resins with different concentrations only by using the inorganic flocculant and the organic flocculant. That is, the flocculation effect of organic pollutants in the water-washed photosensitive resin wastewater is effectively improved through the compounding effect of the active diatomite and the inorganic flocculant, the COD value of the wastewater is effectively reduced, and the wastewater purification effect is good; through the volume nucleus growth speed of the flocculation nucleus body in the control waste water purification process, the collision efficiency of the flocculation body is improved, the operation steps of waste water purification can be simplified, and the waste water purification efficiency is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A method for treating resin washing wastewater is characterized by comprising the following steps:
pretreating the wastewater;
mixing active diatomite with the pretreated wastewater to disperse the active diatomite in the wastewater;
carrying out flocculation treatment on the wastewater dispersed with the active diatomite by using an inorganic flocculant;
and (4) carrying out flocculation and sedimentation treatment on the wastewater after the flocculation treatment by adopting an organic flocculant.
2. The method for treating resin washing wastewater according to claim 1, wherein the mass ratio of the activated diatomite to the wastewater is (0.1-0.2): 100.
3. the method for treating resin waste water from washing according to claim 1, wherein the particle size of the activated diatomaceous earth is 74 to 150 μm.
4. The method for treating resin wastewater according to any one of claims 1 to 3, wherein the activated diatomaceous earth is prepared by:
mixing diatomite and a hydrochloric acid solution, adding activated carbon, performing ultrasonic oscillation, performing solid-liquid separation, washing solid components to be neutral, drying, sequentially calcining, grinding and sieving to obtain the active diatomite.
5. The method for treating resin wastewater according to claim 4, wherein the mass ratio of activated carbon to diatomaceous earth is (5-8): 92-95).
The concentration of the hydrochloric acid solution is 2.5-4 mol/L, and the mass of the hydrochloric acid solution is 2-3 times of the sum of the masses of the diatomite and the activated carbon; and/or
The calcination temperature is 400-500 ℃, and the calcination time is 2-3 h;
the mesh number of the sieve is 100-200 meshes.
6. The method for treating resin washing wastewater according to claim 1, wherein the mass ratio of the inorganic flocculant to the wastewater is (1.0-2.0): 100.
7. the method for treating resin wastewater according to claim 6, wherein the inorganic flocculant comprises at least one of polyaluminium chloride, polyferric chloride, polyaluminium sulfate and polyferric sulfate.
8. The method for treating resin washing wastewater according to claim 7, wherein the mass ratio of the organic flocculant to the wastewater is (5-10): 100; and/or
The organic flocculant contains polyacrylamide, and the mass ratio of the polyacrylamide to the wastewater is (0.0001-0.0003): 100.
9. the method for treating resin waste water from water washing according to claim 8, wherein the polyacrylamide comprises at least one of nonionic polyacrylamide, cationic polyacrylamide, anionic polyacrylamide and amphoteric polyacrylamide.
10. The method for treating resin washing wastewater according to claim 1, wherein the pretreatment is to adjust the pH of the wastewater to 7.0 to 8.5 by a pH adjusting agent.
11. The method for treating resin waste water washing according to claim 10, wherein the pH adjuster comprises at least one of sodium carbonate and sodium bicarbonate.
12. The method for treating resin washing wastewater according to any one of claims 1 to 11, wherein the mass percentage of the resin in the wastewater is 1% to 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049057.5A CN114538587A (en) | 2022-01-17 | 2022-01-17 | Treatment method of water washing resin wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210049057.5A CN114538587A (en) | 2022-01-17 | 2022-01-17 | Treatment method of water washing resin wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114538587A true CN114538587A (en) | 2022-05-27 |
Family
ID=81670965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210049057.5A Pending CN114538587A (en) | 2022-01-17 | 2022-01-17 | Treatment method of water washing resin wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114538587A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116495943A (en) * | 2023-06-19 | 2023-07-28 | 福州市规划设计研究院集团有限公司 | Sewage treatment method by utilizing compound diatomite and A2O technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6325936B1 (en) * | 1998-09-11 | 2001-12-04 | Fuji Jukogyo Kabushiki Kaisha | Process for treating waste water containing a resin |
| JP2004249182A (en) * | 2003-02-19 | 2004-09-09 | Yanmar Co Ltd | Waste liquid treatment method adapted at time of production of photosensitive resin plate |
| CN105731739A (en) * | 2016-05-07 | 2016-07-06 | 长春工业大学 | Comprehensive treatment method for wastewater generated by ABS resin production |
-
2022
- 2022-01-17 CN CN202210049057.5A patent/CN114538587A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6325936B1 (en) * | 1998-09-11 | 2001-12-04 | Fuji Jukogyo Kabushiki Kaisha | Process for treating waste water containing a resin |
| JP2004249182A (en) * | 2003-02-19 | 2004-09-09 | Yanmar Co Ltd | Waste liquid treatment method adapted at time of production of photosensitive resin plate |
| CN105731739A (en) * | 2016-05-07 | 2016-07-06 | 长春工业大学 | Comprehensive treatment method for wastewater generated by ABS resin production |
Non-Patent Citations (3)
| Title |
|---|
| 卢楠: "微污染水强化混凝试验研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑(月刊)》 * |
| 扬宇翔等: "硅藻土比表面的研究", 《南京大学学报(自然科学版)》 * |
| 谢立勇: "《农业自然资源导论》", 28 February 2019, 中国农业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116495943A (en) * | 2023-06-19 | 2023-07-28 | 福州市规划设计研究院集团有限公司 | Sewage treatment method by utilizing compound diatomite and A2O technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107140719B (en) | Method for strengthening algae coagulation by using nitrogen-doped titanium dioxide and simultaneously degrading algae-containing sediment under visible light | |
| Vigneshwaran et al. | Optimization of sustainable chitosan/Moringa. oleifera as coagulant aid for the treatment of synthetic turbid water–A systemic study | |
| CN107098453B (en) | Algae removal coagulant for strengthening algae coagulation and simultaneously degrading algae-containing sediment under visible light, and preparation method and application thereof | |
| CN114538587A (en) | Treatment method of water washing resin wastewater | |
| CN105858848A (en) | Clarificant and preparation method thereof | |
| Lee et al. | Improvement of flocculation efficiency of water treatment by using polymer flocculants | |
| CN110272107A (en) | A kind of waste-water treatment efficient composite flocculation agent and its application | |
| CN102408145B (en) | Composite flocculant and use thereof | |
| Karnena et al. | Alum, Chitin and Sago as coagulants for the optimization of process parameters focussing on coagulant dose and mixing speed | |
| CN108059224B (en) | Compound flocculant for treating industrial wastewater | |
| KR20150106073A (en) | Compostion and method for treating waste water | |
| WO2014126081A1 (en) | Method for treating development wastewater from color filter production step | |
| CN113104900A (en) | Composite polyaluminum ferric chloride flocculating dephosphorization agent and preparation method thereof | |
| JP4272122B2 (en) | Coagulated water treatment method and apparatus | |
| CN107473350A (en) | A kind of sewage disposal precipitating reagent | |
| CN111807483A (en) | Flocculation and sterilization dual-function water treatment agent and preparation method thereof | |
| JP2003093804A (en) | Purification agent for turbid wastewater and sludge | |
| JP2004154726A (en) | Flocculant for waste water treatment | |
| WO2004045740A1 (en) | Purification agent for wastewater and sludge water | |
| Bhattacharya | A fundamental perspective on polyelectrolyte coagulants and flocculants in water treatment | |
| CN115057499B (en) | Urban sewage treatment agent and preparation method thereof | |
| CN114853135B (en) | Treatment method of high-efficiency coagulation-assisting ultra-low turbidity water | |
| WO2016158632A1 (en) | Flocculant for treating waste water, and method for flocculation treatment of waste water | |
| Iyer et al. | Polyelectrolyte Coagulants and Flocculants in Wastewater Treatment: A Fundamental Perspective | |
| CN110540270A (en) | Preparation method of efficient domestic sewage treatment agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |