Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a treating agent for textile wastewater, which solves the problems of complex components, high content of organic substances and harmful substances, deep chromaticity, serious harm to water and the like in the textile wastewater.
The invention also provides a preparation method and a treatment process of the treating agent.
In order to achieve the aim, the invention adopts a treating agent for textile wastewater, which comprises a nano enzyme SECMGA, an activator WRLL for activating the nano enzyme SECMGA and an activator BOJF;
the nano enzyme SECMGGA is activated before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original SECMGGA; the activator WRLL is also a desirable agent for activating the transition state SECMGA to the activated state SECMGA.
As an improvement, the nano enzyme SECMGGA is a nano enzyme with oxidation catalytic activity formed by taking a composite material as a preparation carrier and compounding a purified and washed bacillus subtilis and a mild cracking product of a good activated sludge microorganism.
As an improvement, the active ingredients of the nano enzyme SECMGGA are Bacillus subtilis, hydrolytic bacteria in excellent activated sludge, fermentation bacteria, hydrogen bacteria and acetic acid bacteria, methane bacteria, sulfate reducing bacteria and mild cracking products of anaerobic protozoa.
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 treating agent for textile wastewater, which comprises the following steps:
1) preparing a composite material with a nano microspherical structure as a carrier;
2) collecting bacillus subtilis and activated sludge microorganisms which are separated, purified and cultured for several days, and synthesizing a mild method of freeze thawing and ultrasonic crushing to obtain a cracking active product of the bacteria, 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 1-4 h, performing low-frequency ultrasonic treatment, sieving with a 200-400-mesh sieve, measuring the encapsulation rate, and then loading into specific water treatment equipment.
In addition, the invention also provides a treatment process for textile wastewater, which comprises the following steps:
a) collecting the textile wastewater by a water collecting tank, intercepting paper scraps, foam paper, plastics and large-particle impurity suspended matters in the water by a coarse grating and a fine grating, further removing fine particle impurities, then entering a grit chamber, removing inorganic particles with higher density in the water, pumping into a regulating tank, and homogenizing the water quality and the water quantity;
b) the pH of the textile wastewater is high, the spinning wastewater needs neutralization treatment after homogenization so that the pH meets the treatment requirement of a treating agent, the effluent of a regulating reservoir enters a wastewater neutralization pond, and H is used when the pH of raw water is low2SO4Or HCl neutralization;
c) the effluent after the neutralization of the wastewater is pumped into a reaction tank, the treating agent is added according to a certain proportion, and the primary activation and the cyclic treatment of COD are completed in the stage, so that organic matters, toxic dyes and nitrogen and phosphorus removal are guaranteed to be removed;
d) pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a reaction tank through a sludge reflux device, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
e) after the flocculation tank is treated, the supernatant enters a subsequent conventional sewage treatment link for further treatment, the sludge enters a sludge tank for filter pressing, and finally the obtained sludge blocks are transported outside;
f) 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;
g) and collecting the residual sludge from the reaction tank and the sediments after the reaction in 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, in the step c), the specific operation of adding the treating agent into the reaction tank is as follows:
1) adding a nano enzyme SECMGGA with the volume of 0.05-1% of that of a reaction tank, then adding WRLL with the volume of 0.1-0.8% and BOJF with the volume of 0.01-0.3% of that of the reaction tank, activating the nano enzyme SECMGA by activators WRLL and BOJF for 12-48 h, and also adopting flowing water for 24h multiplied by 1-4 to realize the activation of the nano enzyme SECMGA;
2) after activation is completed, adding the nano enzyme SECMGGA and 0.02-0.08% of WRLL according to 0.005-0.08% of the treated water amount in daily life, and staying for 6-24 h.
As an improvement, the dosage of the flocculating agent added into the flocculation tank is 0-2% of that of the wastewater.
As an improvement, the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture of the polyaluminium chloride and the polyaluminium sulfate.
As an improvement, when the stirring speed in the reaction tank is lower than 200r/min, an aeration device needs to be additionally arranged in the reaction tank.
Compared with the prior art, the invention has the beneficial effects that:
1) the nano material SECMGGA particle of the invention is a nano mimic enzyme with excellent catalytic oxidation capability. The composite carrier has the characteristics of physicochemical treatment of sewage: porous adsorption, contact action, flocculation precipitation and the like; the active components of the microorganisms in the nano enzyme can effectively decompose organic matters and toxic dyes, and effectively solve the problem of unstable operation caused by easy inhibition in biochemical treatment. The use characteristics of the treating agent provided by the invention are combined, and the wastewater treatment process is improved and perfected, so that the method has an excellent pushing effect on the development of a sustainable and low-energy-consumption wastewater treatment process.
2) The invention designs the process for treating the textile wastewater by combining the basic principle of the nano enzyme, can greatly reduce the wastewater treatment cost, reduces the investment cost of enterprises on preventing and treating water environment pollution, and improves the economic benefit. The textile wastewater treatment agent nano enzyme SECMGA provided by the invention is combined with porous substance particles such as diatomite and the like, so that pollutants in the wastewater are adsorbed on the surface of the porous enzyme to be removed, and the decoloring efficiency of hydrophobic dyes is very high; the aerobic-anaerobic microorganism which is the active component compounded by the nano enzyme effectively reduces the concentration of COD and BOD; the corresponding textile wastewater treatment process has the advantages of simple flow, low equipment investment, automatic control, flexible operation and convenient management, and is suitable for large-scale use of wastewater treatment workshops of textile enterprises.
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 treating agent for textile wastewater comprises a nano enzyme SECMGGA, and an activator WRLL and an activator BOJF for activating the nano enzyme SECMGGA;
the nano enzyme SECMGGA is activated before use, and the activator WRLL and the activator BOJF are respectively required agents for activating the original SECMGGA; the activator WRLL is also a desirable agent for activating the transition state SECMGA to the activated state SECMGA.
As an improvement, the nano enzyme SECMGGA takes the composite material disclosed in the prior patent "a composite material and a preparation method and application thereof in biochemical treatment of sewage" (application number is CN201710784101.6) as a preparation carrier, and compounds the purified and washed bacillus subtilis and the mild decomposition product of excellent activated sludge microorganisms to form the nano enzyme with oxidation catalytic activity. The nano enzyme SECMGGA carrier is a composite material, is mainly prepared by combining oxides of silicon, aluminum and iron elements with clay through a special process, and is a microsphere with a porous lamellar structure, wherein the diameter range of the microsphere is 1-5000 microns.
As an improvement, the active ingredients of the nano enzyme SECMGGA are Bacillus subtilis, hydrolytic bacteria, fermentation bacteria, hydrogen bacteria, acetic acid bacteria, methane bacteria, sulfate reducing bacteria and mild lysate after domestication of anaerobic protozoa in excellent activated sludge. Preferably, bacillus subtilis and activated sludge are adopted to acclimatize the excellent flora.
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 adopts one or more of ammonium carbonate, ammonium nitrate and ammonium sulfate.
In addition, the invention also provides a preparation method of the treating agent for textile wastewater, which comprises the following steps:
1) preparing a composite material with a nano microspherical structure as a carrier;
2) collecting bacillus subtilis and activated sludge microorganisms which are separated, purified and cultured for several days, and synthesizing a mild method of freeze thawing and ultrasonic crushing to obtain a cracking active product of the bacteria, 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 1-4 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 adopting the treating agent, which comprises the following steps:
a) textile wastewater is firstly collected by a water collecting tank, then suspended matters such as paper scraps, foam paper, plastics, large-particle impurities and the like in water are intercepted by a coarse grating and a fine grating, fine particle impurities are further removed, the textile wastewater enters a grit chamber, inorganic particles with higher density in the water are removed, and the textile wastewater is pumped into a regulating tank to homogenize water quality and water quantity;
b) the PH of the spinning wastewater is high, the spinning wastewater still needs neutralization treatment after homogenization so that the PH meets the requirement of subsequent new material treatment, the effluent of a regulating reservoir enters a wastewater neutralization pond, and H is usually used when the PH of raw water is low2SO4Or HCl neutralization (to ensure the activity of nano-enzyme during reaction), and desulfurization and ash removal can be considered after adjustment;
c) the effluent after the neutralization of the wastewater is pumped into a reaction tank, the treating agent is added according to a certain proportion, and the primary activation and the cyclic treatment of COD are completed in the stage, so that organic matters, toxic dyes and nitrogen and phosphorus removal are guaranteed to be removed;
the basic reaction formula of the treating agent for textile wastewater COD degradation is as follows:
d) pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a reaction tank through a sludge reflux device, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
e) after the flocculation tank is treated, the supernatant enters a subsequent conventional sewage treatment link for further treatment, the sludge enters a sludge tank for filter pressing, and finally the obtained sludge blocks are transported outside;
f) 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;
g) and collecting the residual sludge from the reaction tank and the sediments after the reaction in 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, in the step c), the specific operation of adding the treating agent into the reaction tank is as follows:
1) adding a nano enzyme SECMGGA with the volume of 0.05-1% of that of a reaction tank, then adding WRLL with the volume of 0.1-0.8% and BOJF with the volume of 0.01-0.3% of that of the reaction tank, activating the nano enzyme SECMGA by activators WRLL and BOJF for 12-48 h, and also adopting flowing water for 24h multiplied by 1-4 to realize the activation of the nano enzyme SECMGA;
2) after activation is completed, adding the nano enzyme SECMGGA and 0.02-0.08% of WRLL according to 0.005-0.08% of the treated water amount in daily life, and staying for 6-24 h.
As an improvement, the dosage of the flocculating agent added into the flocculation tank is 0-2% of that of the wastewater. The treating agent of the invention can be used without flocculant or only with the dosage of 1/8-1/4 of the original flocculant. Removing fine suspended matters, floating matters and colloidal substances in water by chemical flocculation and sedimentation
As an improvement, the flocculant is one of polyaluminium chloride and polyaluminium sulfate or a mixture of the polyaluminium chloride and the polyaluminium sulfate.
As an improvement, when the stirring speed in the reaction tank is lower than 200r/min, an aeration device needs to be additionally arranged in the reaction tank. In addition, a PH monitoring device is also arranged in the reaction tank.
The porous structure of the SECMGA has an adsorption effect and high removal rate on chroma and turbidity.
The components of silicon, aluminum and iron oxide of the SECMGA can remove insoluble colored substances, and ensure the treatment effect and the running stability of the oxidation reduction of active ingredients.
The active component of the SECMGA, namely the bacillus subtilis, can generate a plurality of extracellular enzymes, can rapidly decompose organic matters in wastewater and promote the oxidation of sulfur dyes and nitrite; the use of the active ingredients of the aerobic-anaerobic microorganisms greatly improves the removal rate of BOD and COD.
Example 1
A treating agent for textile wastewater comprises a nano enzyme SECMGGA, and an activator WRLL and an activator BOJF for activating the nano enzyme SECMGGA, wherein the activator WRLL adopts dihydric phosphate, and the activator BOJF adopts ammonium salt;
the treating agent is prepared by 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 bacillus subtilis and activated sludge microorganisms which are separated, purified and cultured for several days, and synthesizing a mild method of freeze thawing and ultrasonic crushing to obtain a cracking active product of the bacteria, 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 for 1h at normal temperature, 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 treating agent for textile wastewater, wherein the steps 1) and 2) are the same as those in the embodiment 1;
in the step 3), the composite material with the nano microspherical structure prepared in the step 1) is dispersed into phosphate buffer solution with the pH value of 8 to form low-viscosity solution, wherein the using amount of the composite material is 1% of that of the phosphate buffer solution, then the composite material is added into the lysate obtained in the step 2), the adding amount of the lysate is 5% of that of the phosphate buffer solution, the lysate is stirred for 2 hours at normal temperature, the lysate passes through a 300-mesh net after low-frequency ultrasound, the encapsulation rate is measured, and then the lysate is loaded into specific water treatment equipment.
Example 3
A preparation method of a treating agent for textile wastewater, wherein the steps 1) and 2) are the same as those in the embodiment 1;
in the step 3), the composite material with the nano microspherical structure prepared in the step 1) is dispersed into phosphate buffer solution with the pH value of 9 to form low-viscosity solution, wherein the using amount of the composite material is 2% of that of the phosphate buffer solution, then the composite material is added into the lysate obtained in the step 2), the adding amount of the lysate is 10% of that of the phosphate buffer solution, the lysate is stirred for 4 hours at normal temperature, the lysate passes through a 400-mesh net after low-frequency ultrasound, the encapsulation rate is measured, and then the lysate is loaded into specific water treatment equipment.
Example 4
By adopting the preparation method described in example 1, the treating agent prepared by the invention is put into textile wastewater (taken from XX textile mill), and is treated according to the laboratory sewage flow, the main pollutant indexes COD, BOD and toxic dye in the wastewater are respectively measured, and the treatment effect is shown in Table 1.
TABLE 1 treatment Effect of the treating agent of the present invention on textile wastewater
The analysis table 1 shows that the textile wastewater treatment agent can effectively reduce the COD, BOD and dye content in the water, and can be effectively used for treating the wastewater of textile factories by combining with the process flow.
Example 5
With reference to the treatment process flow shown in fig. 1, the treatment process of the textile printing and dyeing wastewater comprises the following steps:
a) textile wastewater is firstly collected by a water collecting tank, then suspended matters such as paper scraps, foam paper, plastics, large-particle impurities and the like in water are intercepted by a coarse grating and a fine grating, fine particle impurities are further removed, the textile wastewater enters a grit chamber, inorganic particles with higher density in the water are removed, and the textile wastewater is pumped into a regulating tank to homogenize water quality and water quantity;
b) the PH of the spinning wastewater is high, the spinning wastewater still needs neutralization treatment after homogenization so that the PH meets the requirement of subsequent new material treatment, the effluent of a regulating reservoir enters a wastewater neutralization pond, and H is usually used when the PH of raw water is low2SO4Or HCl neutralization, with desulfurization and ash removal being considered after conditioning;
c) the effluent after the neutralization of the wastewater is pumped into a reaction tank, the treating agent is added according to a certain proportion, and the primary activation and the cyclic treatment of COD are completed in the stage, so that organic matters, toxic dyes and nitrogen and phosphorus removal are guaranteed to be removed;
the basic reaction formula of the treating agent for textile wastewater COD degradation is as follows:
wherein, the concrete operation of adding the treating agent into the reaction tank is as follows:
1) adding a nano enzyme SECMGGA with the volume of 0.05-1% of that of a reaction tank, then adding WRLL with the volume of 0.1-0.8% and BOJF with the volume of 0.01-0.3% of that of the reaction tank, activating the nano enzyme SECMGA by activators WRLL and BOJF for 12-48 h, and also adopting flowing water for 24h multiplied by 1-4 to realize the activation of the nano enzyme SECMGA;
2) after activation is completed, adding the nano enzyme SECMGGA and 0.02-0.08% of WRLL according to 0.005-0.08% of the treated water quantity in daily life, and staying for 6-24 h;
d) pumping raw water into a sedimentation tank for sedimentation, refluxing a bottom material to a reaction tank through a sludge reflux device, and feeding a supernatant liquid into a flocculation tank for subsequent treatment;
e) after the flocculation tank is treated, the supernatant enters a subsequent conventional sewage treatment link for further treatment, the sludge enters a sludge tank for filter pressing, and finally the obtained sludge blocks are transported outside;
f) 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;
g) and collecting the residual sludge from the reaction tank and the sediments after the reaction in 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.
In addition, the dosage of the flocculating agent added into the flocculation tank is 0-2% of the wastewater. The treating agent of the invention can be used without flocculant or only with the dosage of 1/8-1/4 of the original flocculant. The flocculant is one or mixture of polyaluminium chloride and polyaluminium sulfate, and the fine suspended matters, floating matters and colloid substances in water are removed by chemical flocculation and sedimentation.
When the stirring speed in the reaction tank is lower than 200r/min, an aeration device needs to be additionally arranged in the reaction tank. In addition, a PH monitoring device is also arranged in the reaction tank.
Example 6
0.2 percent of treating agent (based on the total amount of raw water) is added into the wastewater reaction tank for pretreatment, the mixture is circularly stirred for 18-24 hours, the process is normally operated according to the process of the embodiment 5, and indexes of main pollutants of various treated effluent are detected, and the results are shown in table 2.
TABLE 2 indexes of pollutants in water treated with the treating agent of the present invention
Index (I)
|
Effluent of existing process
|
The process of the invention produces water
|
CODcr removal Rate (%)
|
72
|
97
|
BOD5 removal (%)
|
39
|
100 (undetected BOD5)
|
Metal ion (%)
|
10.1
|
2.2
|
Chroma removal ratio (%)
|
80
|
99
|
Turbidity removal rate (%)
|
83
|
96 |
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 nano enzyme SECMGGA and the process have obvious textile wastewater treatment effect, each index reaches the national emission 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.