CN108862845B - Printing and dyeing wastewater treating agent, preparation method and treatment process thereof - Google Patents

Printing and dyeing wastewater treating agent, preparation method and treatment process thereof Download PDF

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CN108862845B
CN108862845B CN201810711025.0A CN201810711025A CN108862845B CN 108862845 B CN108862845 B CN 108862845B CN 201810711025 A CN201810711025 A CN 201810711025A CN 108862845 B CN108862845 B CN 108862845B
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dyemga
tank
printing
treatment
activator
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CN108862845A (en
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朱阳光
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Nanjing Letousi High tech Materials Technology Co.,Ltd.
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Nanjing Lotus Environmental Science & Technology Co ltd
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C02F2101/308—Dyes; Colorants; Fluorescent agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used

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  • Water Supply & Treatment (AREA)
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  • Organic Chemistry (AREA)
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Abstract

The invention discloses a printing and dyeing wastewater treatment agent, a preparation method and a treatment process thereof, belonging to the technical field of sewage purification, and comprising a nano enzyme DYEMGA, an activator WRLL and an activator BOJF, wherein the activator WRLL and the activator BOJF are used for activating the nano enzyme DYEMGA; the nano enzyme DYEMGA is added with an activator before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original DYEMGA; the activator WRLL is also a desirable agent for activating the transition state dye to the activated state dye. The printing and dyeing wastewater treatment process has simple flow and low equipment investment, improves the decolorization rate and the COD removal rate: the removal rate of CODcr of the printing and dyeing wastewater is as high as 95%, the removal rate of turbidity is as high as 95%, and the removal rate of chroma is 98%.

Description

Printing and dyeing wastewater treating agent, preparation method and treatment process thereof
Technical Field
The invention relates to a printing and dyeing wastewater treating agent, a preparation method and a treatment process thereof, belonging to the technical field of sewage purification.
Background
The printing and dyeing wastewater is wastewater with large water quantity, high and variable chromaticity, large pH change, complex components and poor biodegradability, and also belongs to industrial wastewater which is difficult to treat. In recent years, with the development of chemical fiber fabrics, the rise of silk-like fabrics and the improvement of finishing requirements after printing and dyeing are realized, so that a large amount of refractory organic matters such as PVA slurry, rayon alkaline hydrolysate, novel dye, auxiliary agents and the like enter printing and dyeing wastewater, and the treatment process of the traditional wastewater poses serious challenges. The existing method for treating the printing and dyeing wastewater mainly comprises three aspects of a physical method, a chemical method and a biological method.
In the actual operation process, a physical and chemical method is adopted, namely, a coagulation coagulant aid such as ferric salt, aluminum salt and PAM is added, or the concentration and toxicity of pollutants in the printing and dyeing wastewater are reduced by adsorption, grid mesh screening and other modes, and then the wastewater enters a biochemical system for anaerobic (hydrolytic) aerobic combined treatment. However, the method has the problems of limited biochemical treatment capacity, unstable biochemical operation, high chemical sludge yield and the like. From the current situation of the wastewater treatment technology in the whole printing and dyeing industry, no substantial breakthrough exists, so the fundamental way to solve the wastewater problem lies in developing a new high-efficiency treatment material, and reducing the emission or not discharging the wastewater by combining an advanced production process, thereby effectively reducing the pollution of the printing and dyeing wastewater to the environment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a printing and dyeing wastewater treatment agent to solve the problems of high pollutant concentration, deep chromaticity, large pH change, poor biodegradability and the like in printing and dyeing wastewater.
The invention also provides a preparation method and a treatment process of the printing and dyeing wastewater treatment agent.
In order to achieve the aim, the printing and dyeing wastewater treatment agent adopted by the invention comprises a nano enzyme DYEMGA, an activator WRLL for activating the nano enzyme DYEMGA and an activator BOJF;
the nano enzyme DYEMGA is added with an activator before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original DYEMGA; the activator WRLL is also a desirable agent for activating the transition state dye to the activated state dye.
As an improvement, the nanometer enzyme DYEMGA is prepared by taking a composite material as a preparation carrier and compounding a purified and washed mild cracking product of aerobic-anaerobic bacteria to form the nanometer enzyme with oxidative catalytic activity.
As an improvement, the active component of the nano enzyme DYEMGA is a mild cracking product of aerobic-anaerobic bacteria.
As an improvement, the activator WRLL adopts dihydric phosphate, and the activator BOJF adopts ammonium salt.
In addition, the invention also provides a preparation method of the printing and dyeing wastewater treatment agent, which comprises the following steps:
1) preparing a composite material with a nano microspherical structure as a carrier;
2) collecting microorganisms for separation, purification and culture for several days, and synthesizing a mild method of freeze thawing and ultrasonic crushing to obtain a cracking active product of the thallus, washing with pure water for later use, wherein the preparation process is mild and low temperature is kept;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into a phosphate buffer solution with the pH value of 6-9 to form a low-viscosity solution, wherein the using amount of the composite material is 0.2-2% of the phosphate buffer solution, adding the cracking product obtained in the step 2), the adding amount of the cracking product is 0.1-10% of the phosphate buffer solution, stirring at normal temperature for 2-4 h, passing through a 200-400-mesh net after low-frequency ultrasonic, measuring the encapsulation rate, and then loading into specific water treatment equipment.
As an improvement, the microorganism in the step 2) adopts one or more of aerobic bacteria, namely bacillus subtilis, aeromonas hydrophila and planktonic chlamydomonas; and the combination of (a) and (b),
one or more of Bacteroides, Proteus and Clostridium.
In addition, the invention also provides a treatment process of the printing and dyeing wastewater, which comprises the following steps:
1) physicochemical pretreatment of printing and dyeing wastewater
a. Collecting printing and dyeing wastewater by a water collecting tank, intercepting paper scraps, foam paper, plastics and large-particle impurity suspended matters in water by a coarse grating and a fine grating, further removing fine particle impurities, then entering a grit chamber, and removing inorganic particles with high density in water;
b. the effluent of the grit chamber enters a dyeing wastewater neutralization tank, and H is used when the pH of raw water is low2SO4Or HCl neutralization;
2) nano enzyme DYEMGA physicochemical-biochemical combined treatment
c. The effluent after the neutralization of the wastewater is pumped into a regulating tank, and the treating agent is put into the regulating tank according to a certain proportion, so that the primary activation and the circulation treatment of COD are completed in the stage;
d. entering a treatment system of a flocculation tank, removing fine suspended matters, floating matters and colloidal substances in water by chemical flocculation and sedimentation, wherein a common flocculant can be added without or with the addition amount of 1/8-1/4 below the original amount;
e. pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a regulating tank through sludge reflux equipment, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
3) subsequent treatment of printing and dyeing wastewater
f. After the flocculation tank is treated with or without a flocculating agent, the supernatant enters a subsequent conventional sewage treatment link for further treatment, sludge enters a sludge tank for filter pressing, and finally the obtained sludge block is transported outside;
g. the effluent treated by the flocculation tank enters a filter tank for temporary storage, is finally sterilized by an ultraviolet disinfection tank, and can be recycled or discharged after being detected to reach the standard;
h. and collecting the residual sludge from the regulating tank and the sediments after the reaction of the flocculation tank by a sludge collecting well, then concentrating the sludge in a sludge concentration workshop, then conveying the sludge to a sludge dewatering workshop for dewatering to obtain a sludge cake, and carrying out outward transportation treatment at regular intervals.
As an improvement, the specific operation of feeding the treating agent into the regulating tank is as follows:
1) adding nano enzyme DYEMGA accounting for 0.1-1% of the volume of the regulating tank, then adding WRLL accounting for 0.2-0.8% of the volume of the regulating tank and BOJF accounting for 0.02-0.2% of the volume of the regulating tank, activating the nano enzyme DYEMGA through activators WRLL and BOJF for 24-48 h, and activating the nano enzyme DYEMGA by adopting flowing water for 24h multiplied by 2-4;
2) after activation is finished, adding nano enzyme DYEMGA and 0.02-0.08% of WRLL according to 0.01-0.04% of the treated water amount in daily life, and staying for 12-24 h.
As an improvement, when the stirring speed in the reaction tank is lower than 200r/min, aeration gas is additionally arranged in the reaction tank; and a PH monitoring device is arranged in the reaction tank.
As an improvement, the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture of the polyaluminium chloride and the polyaluminium sulfate.
Compared with the prior art, the invention has the beneficial effects that:
1) the nanometer material DYEMGA particle belongs to mimic enzyme with excellent catalytic oxidation capacity, has a porous adsorption structure and a coagulating sedimentation effect, and has a good application effect in the field of environmental science sewage treatment. Aiming at the characteristics of printing and dyeing wastewater, the invention establishes a treatment system based on a nano enzyme as a basic principle, and effectively solves the problem of unstable operation caused by easy inhibition in biochemical treatment along with physicochemical treatment such as adsorption, flocculation and the like. The active substances in the new material for biochemical treatment are combined, the problems of organic matter decomposition, poison dye and heavy metal removal rate and the like of the printing and dyeing wastewater are effectively treated, and the wastewater treatment process is improved and perfected: the printing and dyeing wastewater is filtered, and the nano enzyme DYEMGA is used for organically decomposing pollutants, so that the harmful substances of decomposition products are reduced, the printing and dyeing wastewater is reasonably treated, and the treatment index of the printing and dyeing wastewater is really reached.
2) The invention combines the basic principle of nano enzyme, designs the process for treating the printing and dyeing wastewater, combines physicochemical and biochemical treatment methods, can greatly reduce the wastewater treatment cost, reduces the investment cost of enterprises on preventing and treating water environmental pollution, and improves the economic benefit. The printing and dyeing wastewater treatment process has simple flow and low equipment investment, improves the decolorization rate and the COD removal rate: the removal rate of CODcr of the printing and dyeing wastewater is as high as 95%, the removal rate of turbidity is as high as 95%, and the removal rate of chroma is 98%. The invention aims to realize automatic control, is flexible to operate and convenient to manage, and is suitable for large-scale use of the wastewater treatment workshop of the printing and dyeing enterprise.
Drawings
FIG. 1 is a flow chart of the printing and dyeing wastewater treatment process of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
A treatment agent for printing and dyeing wastewater comprises a nano enzyme DYEMGA, an activator WRLL and an activator BOJF, wherein the activator WRLL and the activator BOJF are used for activating the nano enzyme DYEMGA;
the nano enzyme DYEMGA is added with an activator before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original DYEMGA; the activator WRLL is also a desirable agent for activating the transition state dye to the activated state dye.
As an improvement, the nanometer enzyme DYEMGA takes a composite material disclosed in the prior patent of 'a composite material and a preparation method and application thereof in sewage biochemical treatment' (application number is CN201710784101.6) as a preparation carrier, and is compounded with a mild cracking product of purified and washed aerobic-anaerobic bacteria to form the nanometer enzyme with oxidation catalytic activity.
As an improvement, the active component of the nano enzyme DYEMGA is a mild cracking product of aerobic-anaerobic bacteria.
As a modification, the activating agent WRLL adopts dihydric phosphate, preferably one or two of sodium dihydrogen phosphate and potassium dihydrogen phosphate; the activator BOJF adopts ammonium salt, and preferably one or more of ammonium carbonate, ammonium nitrate and ammonium sulfate.
In addition, the invention also provides a preparation method of the printing and dyeing wastewater treatment agent, which comprises the following steps:
1) preparing a composite material with a nano microspherical structure as a carrier;
2) collecting the microorganism which is separated, purified and cultured for several days, preferably: domesticating and breeding a flora with a high-efficiency purification function in a laboratory, wherein the flora comprises but is not limited to one or more of aerobic bacteria, namely bacillus subtilis, aeromonas hydrophila and planktonic coccobacillus; anaerobic microorganisms, preferably one or more of Bacteroides, Proteus and Clostridium, by combining a mild freezing and thawing and ultrasonication method to obtain a lysis active product of the thallus, washing with pure water for later use, wherein the preparation process is mild and low temperature is kept;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into a phosphate buffer solution with the pH value of 6-9 to form a low-viscosity solution, wherein the using amount of the composite material is 0.2-2% of the phosphate buffer solution, adding the cracking product obtained in the step 2), the adding amount of the cracking product is 0.1-10% of the phosphate buffer solution, stirring at normal temperature for 2-4 h, passing through a 200-400-mesh net after low-frequency ultrasonic, measuring the encapsulation rate, and then loading into specific water treatment equipment.
In addition, the invention also provides a treatment process of the printing and dyeing wastewater, which comprises the following steps:
1) physicochemical pretreatment of printing and dyeing wastewater
a. Collecting printing and dyeing wastewater by a water collecting tank, intercepting paper scraps, foam paper, plastics and large-particle impurity suspended matters in water by a coarse grating and a fine grating, further removing fine particle impurities, then entering a grit chamber, and removing inorganic particles with high density in water;
b. the effluent of the grit chamber enters a dyeing wastewater neutralization tank, and H is used when the pH of raw water is low2SO4Or HCl neutralization;
2) nano enzyme DYEMGA physicochemical-biochemical combined treatment
c. The effluent after the neutralization of the wastewater is pumped into a regulating tank, and the treating agent is put into the regulating tank according to a certain proportion, so that the primary activation and the circulation treatment of COD are completed in the stage;
the basic reaction formula of the treatment agent for the COD degradation of the printing and dyeing wastewater is as follows:
Figure BDA0001716598830000051
the concrete operation of throwing the treating agent into the regulating tank is as follows:
1) adding nano enzyme DYEMGA accounting for 0.1-1% of the volume of the regulating tank, then adding WRLL accounting for 0.2-0.8% of the volume of the regulating tank and BOJF accounting for 0.02-0.2% of the volume of the regulating tank, activating the nano enzyme DYEMGA through activators WRLL and BOJF for 24-48 h, and activating the nano enzyme DYEMGA by adopting flowing water for 24h multiplied by 2-4;
2) after activation is finished, adding nano enzyme DYEMGA and 0.02-0.08% of WRLL according to 0.01-0.04% of the treated water amount in daily life, and staying for 12-24 h;
d. entering a treatment system of a flocculation tank, removing fine suspended matters, floating matters and colloidal substances in water by chemical flocculation and sedimentation, wherein a common flocculant can be added without or with the addition amount of 1/8-1/4 below the original amount;
e. pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a regulating tank through sludge reflux equipment, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
3) subsequent treatment of printing and dyeing wastewater
f. After the flocculation tank is treated with or without a flocculating agent, the supernatant enters a subsequent conventional sewage treatment link for further treatment, sludge enters a sludge tank for filter pressing, and finally the obtained sludge block is transported outside;
g. the effluent treated by the flocculation tank enters a filter tank for temporary storage, is finally sterilized by an ultraviolet disinfection tank, and can be recycled or discharged after being detected to reach the standard;
h. and collecting the residual sludge from the regulating tank and the sediments after the reaction of the flocculation tank by a sludge collecting well, then concentrating the sludge in a sludge concentration workshop, then conveying the sludge to a sludge dewatering workshop for dewatering to obtain a sludge cake, and carrying out outward transportation treatment at regular intervals.
As an improvement, when the stirring speed in the reaction tank is lower than 200r/min, aeration gas is additionally arranged in the reaction tank; and a PH monitoring device is arranged in the reaction tank.
As an improvement, the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture of the polyaluminium chloride and the polyaluminium sulfate. And removing fine suspended matters, floating matters and colloidal substances in the water by chemical flocculation sedimentation.
Example 1
A treatment agent for printing and dyeing wastewater comprises a nano enzyme DYEMGA, an activator WRLL and an activator BOJF, wherein the activator WRLL and the activator BOJF are used for activating the nano enzyme DYEMGA; the activator WRLL adopts dihydric phosphate, and the activator BOJF adopts ammonium salt;
the preparation method of the printing and dyeing wastewater treatment agent comprises the following steps:
1) the composite material with a nano microspherical structure is prepared to be used as a carrier of the invention by adopting the prior patent of 'a composite material and a preparation method and application thereof in biochemical treatment of sewage' (the application number is CN 201710784101.6); e.g. adopt
a) 100 g of sodium silicate, 30 g of clay (from Wanhong mining Co., Ltd., Qingdao), 30 g of iron oxide (Fe)2O3) 30 g of alumina (Al)2O3) 10ml of concentrated hydrochloric acid (commercially available) are uniformly mixed and reacted for 6 hours in a closed manner at 120 ℃;
b) uniformly mixing the reaction product obtained in the step a), introducing nitrogen at 100 ℃, and continuously blowing the nitrogen for 30 minutes;
c) calcining the product obtained in the step b) at high temperature of 650 ℃ in air for 30 minutes;
d) filling the calcined product in the step c) into steam, and hydrating at high temperature and high pressure (3 atmospheric pressure, 120 ℃);
e) carrying out microwave drying treatment on the hydration product in the step d);
f) ultrasonically crushing the product after the microwave drying treatment, and sieving the product by a 320-mesh sieve to obtain the final required material;
2) collecting separated, purified and cultured microorganisms for several days, and domesticating and breeding aerobic bacteria bacillus subtilis and aeromonas hydrophila with efficient purification function in a laboratory; the method comprises the following steps of (1) obtaining a cracking active product of thalli by a mild method of bacillus bacteroides and proteus and comprehensive freeze thawing and ultrasonic crushing, washing with pure water for later use, wherein the preparation process is mild and low temperature is kept;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into phosphate buffer solution with the pH value of 6 to form low-viscosity solution, wherein the using amount of the composite material is 0.2% of the phosphate buffer solution, then adding the lysate obtained in the step 2), the adding amount of the lysate is 0.1% of the phosphate buffer solution, stirring at normal temperature for 2h, passing through a 200-mesh net after low-frequency ultrasound, measuring the encapsulation rate, and then loading into specific water treatment equipment.
Example 2
A preparation method of a printing and dyeing wastewater treatment agent comprises the following steps:
1) the composite material with a nano microspherical structure is prepared to be used as a carrier of the invention by adopting the prior patent of 'a composite material and a preparation method and application thereof in biochemical treatment of sewage' (the application number is CN 201710784101.6); e.g. adopt
a) 100 g of sodium silicate, 30 g of clay (from Wanhong mining Co., Ltd., Qingdao), 30 g of iron oxide (Fe)2O3) 30 g of alumina (Al)2O3) 10ml of concentrated hydrochloric acid (commercially available) are uniformly mixed and reacted for 6 hours in a closed manner at 120 ℃;
b) uniformly mixing the reaction product obtained in the step a), introducing nitrogen at 100 ℃, and continuously blowing the nitrogen for 30 minutes;
c) calcining the product obtained in the step b) at high temperature of 650 ℃ in air for 30 minutes;
d) filling the calcined product in the step c) into steam, and hydrating at high temperature and high pressure (3 atmospheric pressure, 120 ℃);
e) carrying out microwave drying treatment on the hydration product in the step d);
f) ultrasonically crushing the product after the microwave drying treatment, and sieving the product by a 320-mesh sieve to obtain the final required material;
2) collecting separated, purified and cultured microorganisms for several days, and domesticating and breeding aerobic bacteria, namely bacillus subtilis, aeromonas hydrophila and sphaerotheca plankton with high-efficiency purification function in a laboratory; anaerobic microorganisms, bacteroides, proteus and clostridium, obtaining a cracking active product of the thallus by a mild method of comprehensive freeze thawing and ultrasonic crushing, washing with pure water for later use, and keeping the preparation process mild and low temperature;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into a phosphate buffer solution with the pH value of 8 to form a low-viscosity solution, wherein the using amount of the composite material is 1% of that of the phosphate buffer solution, adding the lysate obtained in the step 2), the adding amount of the lysate is 5% of that of the phosphate buffer solution, stirring at normal temperature for 3h, passing through a 300-mesh net after low-frequency ultrasound, measuring the encapsulation rate, and then loading into specific water treatment equipment.
Example 3
A preparation method of a printing and dyeing wastewater treatment agent comprises the following steps:
1) the composite material with a nano microspherical structure is prepared to be used as a carrier of the invention by adopting the prior patent of 'a composite material and a preparation method and application thereof in biochemical treatment of sewage' (the application number is CN 201710784101.6); e.g. adopt
a) 100 g of sodium silicate, 30 g of clay (from Wanhong mining Co., Ltd., Qingdao), 30 g of iron oxide (Fe)2O3) 30 g of alumina (Al)2O3) 10ml of concentrated hydrochloric acid (commercially available) are uniformly mixed and reacted for 6 hours in a closed manner at 120 ℃;
b) uniformly mixing the reaction product obtained in the step a), introducing nitrogen at 100 ℃, and continuously blowing the nitrogen for 30 minutes;
c) calcining the product obtained in the step b) at high temperature of 650 ℃ in air for 30 minutes;
d) filling the calcined product in the step c) into steam, and hydrating at high temperature and high pressure (3 atmospheric pressure, 120 ℃);
e) carrying out microwave drying treatment on the hydration product in the step d);
f) ultrasonically crushing the product after the microwave drying treatment, and sieving the product by a 320-mesh sieve to obtain the final required material;
2) collecting separated, purified and cultured microorganisms for several days, and domesticating and breeding aerobic bacteria bacillus subtilis and planktonic chlamydomonas with high-efficiency purification function in a laboratory; the method comprises the following steps of (1) obtaining a cracking active product of thallus by a mild method of bacillus bacteroides and clostridium by comprehensive freeze thawing and ultrasonic crushing, washing with pure water for later use, wherein the preparation process is mild and low temperature is kept;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into a phosphate buffer solution with the pH value of 9 to form a low-viscosity solution, wherein the using amount of the composite material is 2% of that of the phosphate buffer solution, adding the lysate obtained in the step 2), the adding amount of the lysate is 10% of that of the phosphate buffer solution, stirring at normal temperature for 4h, passing through a 400-mesh screen after low-frequency ultrasound, measuring the encapsulation rate, and then loading into specific water treatment equipment.
Example 4
By the preparation method described in example 1, the treatment agent prepared by the invention is added into printing and dyeing wastewater (taken from XX printing and dyeing mills), after treatment in a laboratory, main pollutant indexes COD, BOD and toxic dye in the wastewater are respectively measured and analyzed, and the main indexes are shown in the following table 1.
TABLE 1 treatment Effect of the treating agent of the present invention on printing and dyeing wastewater
COD removal Rate (%) BOD5 removal (%) Chroma removal ratio (%) Turbidity removal rate (%)
Water outlet by common process 76 64 70 50
The process of the invention produces water 95 88 91 93
The data show that the printing and dyeing wastewater treatment agent can effectively reduce the COD, BOD and dye content in the water, and the effect is far better than that of the existing common treatment process. The process flow combined with the method can be effectively used for treating the printing and dyeing wastewater of textile factories.
Example 5
A process for treating printing and dyeing wastewater, as shown in figure 1, comprises the following steps:
1) physicochemical pretreatment of printing and dyeing wastewater
a. Collecting printing and dyeing wastewater by a water collecting tank, intercepting paper scraps, foam paper, plastics and large-particle impurity suspended matters in water by a coarse grating and a fine grating, further removing fine particle impurities, then entering a grit chamber, and removing inorganic particles with high density in water;
b. the effluent of the grit chamber enters a dyeing wastewater neutralization tank, and H is used when the pH of raw water is low2SO4Or HCl neutralization;
2) nano enzyme DYEMGA physicochemical-biochemical combined treatment
c. The effluent after the neutralization of the wastewater is pumped into a regulating tank, and the treating agent is put into the regulating tank according to a certain proportion, so that the primary activation and the circulation treatment of COD are completed in the stage;
the basic reaction formula of the treatment agent for the COD degradation of the printing and dyeing wastewater is as follows:
Figure BDA0001716598830000101
the concrete operation of throwing the treating agent into the regulating tank is as follows:
1) adding nano enzyme DYEMGA accounting for 0.1-1% of the volume of the regulating tank, then adding WRLL accounting for 0.2-0.8% of the volume of the regulating tank and BOJF accounting for 0.02-0.2% of the volume of the regulating tank, activating the nano enzyme DYEMGA through activators WRLL and BOJF for 24-48 h, and activating the nano enzyme DYEMGA by adopting flowing water for 24h multiplied by 2-4;
2) after activation is finished, adding nano enzyme DYEMGA and 0.02-0.08% of WRLL according to 0.01-0.04% of the treated water amount in daily life, and staying for 12-24 h;
d. entering a treatment system of a flocculation tank, removing fine suspended matters, floating matters and colloidal substances in water by chemical flocculation and sedimentation, wherein a common flocculant can be added without or with the addition amount of 1/8-1/4 below the original amount;
e. pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a regulating tank through sludge reflux equipment, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
3) subsequent treatment of printing and dyeing wastewater
f. After the flocculation tank is treated with or without a flocculating agent, the supernatant enters a subsequent conventional sewage treatment link for further treatment, sludge enters a sludge tank for filter pressing, and finally the obtained sludge block is transported outside;
g. the effluent treated by the flocculation tank enters a filter tank for temporary storage, is finally sterilized by an ultraviolet disinfection tank, and can be recycled or discharged after being detected to reach the standard;
h. and collecting the residual sludge from the regulating tank and the sediments after the reaction of the flocculation tank by a sludge collecting well, then concentrating the sludge in a sludge concentration workshop, then conveying the sludge to a sludge dewatering workshop for dewatering to obtain a sludge cake, and carrying out outward transportation treatment at regular intervals.
As an improvement of the embodiment, when the stirring speed in the reaction tank is lower than 200r/min, aeration gas is added in the reaction tank; and a PH monitoring device is arranged in the reaction tank.
As an improvement, the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture of the polyaluminium chloride and the polyaluminium sulfate. And removing fine suspended matters, floating matters and colloidal substances in the water by chemical flocculation sedimentation.
Example 6
And (3) adding a treating agent accounting for 0.5 percent of the total mass of the raw water into the wastewater adjusting tank for pretreatment, circularly stirring for 24-36 hours, normally operating according to the flow of the embodiment 5, and detecting indexes of main pollutants of various treated effluent, wherein the results are shown in Table 2.
TABLE 2 indexes of pollutants in water treated by the treatment process of the present invention
Index (I) Raw water Effluent of existing process The treatment process of the invention produces effluent
CODcr removal Rate (%) 2500～3500(ppm) 70 95
BOD5 removal (%) 500～700(ppm) 31 Not detected out
Metal ion (%) 23 11.5 3.2
Chroma removal ratio (%) — 83 98
Turbidity removal rate (%) — 88 95
As shown in Table 2, the treatment agent and the related process thereof of the invention can significantly reduce COD, BOD and metal ions which are main pollutants, and have significant effect on the treatment of chromaticity and turbidity. The nanometer enzyme DYEMGA and the process have very obvious treatment effect on printing and dyeing wastewater, all indexes of the nanometer enzyme DYEMGA reach the national discharge standard, the preparation method is simple, the treatment equipment is simplified, and the process has higher economic benefit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. A treatment agent for printing and dyeing wastewater is characterized by comprising a nano enzyme DYEMGA, an activator WRLL for activating the nano enzyme DYEMGA and an activator BOJF;
the nano enzyme DYEMGA is added with an activator before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original DYEMGA; the activator WRLL is also a desired agent for activating the transition state DYEMGA to the activated state DYEMGA;
the nanometer enzyme DYEMGA is prepared by taking a composite material as a preparation carrier and compounding a mild cracking product of purified and washed aerobic-anaerobic bacteria to form nanometer enzyme with oxidation catalytic activity;
the active component of the nano enzyme DYEMGA is a mild cracking product of aerobic-anaerobic bacteria;
the activator WRLL adopts dihydric phosphate, and the activator BOJF adopts ammonium salt;
the printing and dyeing wastewater treatment agent adopts nano enzyme DYEMGA prepared by a preparation method comprising the following steps:
1) preparing a composite material with a nano microspherical structure as a carrier;
2) collecting microorganisms for separation, purification and culture for several days, and synthesizing a mild method of freeze thawing and ultrasonic crushing to obtain a cracking active product of the thallus, washing with pure water for later use, wherein the preparation process is mild and low temperature is kept; the microorganism adopts one or more of aerobic bacteria, namely bacillus subtilis, aeromonas hydrophila and planktonic chlamydomonas; and, one or more of Bacteroides, Proteus and Clostridium;
3) dispersing the composite material with the nano micro-spherical structure prepared in the step 1) into a phosphate buffer solution with the pH value of 6-9 to form a low-viscosity solution, wherein the using amount of the composite material is 0.2-2% of the phosphate buffer solution, adding the cracking product obtained in the step 2), the adding amount of the cracking product is 0.1-10% of the phosphate buffer solution, stirring at normal temperature for 2-4 h, passing through a 200-400-mesh net after low-frequency ultrasonic, measuring the encapsulation rate, and then loading into specific water treatment equipment.
2. The treatment process of the printing and dyeing wastewater is characterized by comprising the following steps:
1) physicochemical pretreatment of printing and dyeing wastewater
a. Collecting printing and dyeing wastewater by a water collecting tank, intercepting paper scraps, foam paper, plastics and large-particle impurity suspended matters in water by a coarse grating and a fine grating, further removing fine particle impurities, then entering a grit chamber, and removing inorganic particles with high density in water;
b. the effluent of the grit chamber enters a dyeing wastewater neutralization tank, and H is used when the pH of raw water is low2SO4Or HCl neutralization;
2) nano enzyme DYEMGA physicochemical-biochemical combined treatment
c. The effluent after the neutralization of the wastewater is pumped into a regulating tank, and the treating agent in claim 1 is added into the regulating tank according to a certain proportion, so that the primary activation and the circulation treatment of COD are completed in the stage;
d. entering a treatment system of a flocculation tank, removing fine suspended matters, floating matters and colloidal substances in water by chemical flocculation and sedimentation, wherein a common flocculant can be added without or with the addition amount of 1/8-1/4 below the original amount;
e. pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a regulating tank through sludge reflux equipment, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
3) subsequent treatment of printing and dyeing wastewater
f. After the flocculation tank is treated with or without a flocculating agent, the supernatant enters a subsequent conventional sewage treatment link for further treatment, sludge enters a sludge tank for filter pressing, and finally the obtained sludge block is transported outside;
g. the effluent treated by the flocculation tank enters a filter tank for temporary storage, is finally sterilized by an ultraviolet disinfection tank, and can be recycled or discharged after being detected to reach the standard;
h. and collecting the residual sludge from the regulating tank and the sediments after the reaction of the flocculation tank by a sludge collecting well, then concentrating the sludge in a sludge concentration workshop, then conveying the sludge to a sludge dewatering workshop for dewatering to obtain a sludge cake, and carrying out outward transportation treatment at regular intervals.
3. The process for treating printing and dyeing wastewater according to claim 2, wherein the specific operations of adding the treating agent into the regulating tank are as follows:
1) adding nano enzyme DYEMGA accounting for 0.1-1% of the volume of the regulating tank, then adding WRLL accounting for 0.2-0.8% of the volume of the regulating tank and BOJF accounting for 0.02-0.2% of the volume of the regulating tank, activating the nano enzyme DYEMGA through activators WRLL and BOJF for 24-48 h, and also adopting flowing water for 24h x (2-4) to realize the activation of the nano enzyme DYEMGA;
2) after activation is finished, adding nano enzyme DYEMGA and 0.02-0.08% of WRLL according to 0.01-0.04% of the treated water amount in daily life, and staying for 12-24 h.
4. The process for treating printing and dyeing wastewater according to claim 2, wherein when the stirring speed in the reaction tank is lower than 200r/min, aeration is added to the reaction tank; and a pH monitoring device is arranged in the reaction tank.
5. The process for treating printing and dyeing wastewater according to claim 2, wherein the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture thereof.
CN201810711025.0A 2018-07-03 2018-07-03 Printing and dyeing wastewater treating agent, preparation method and treatment process thereof Active CN108862845B (en)

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