CN112209509A - Wastewater treatment agent and preparation method thereof - Google Patents
Wastewater treatment agent and preparation method thereof Download PDFInfo
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- CN112209509A CN112209509A CN202010832538.4A CN202010832538A CN112209509A CN 112209509 A CN112209509 A CN 112209509A CN 202010832538 A CN202010832538 A CN 202010832538A CN 112209509 A CN112209509 A CN 112209509A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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Abstract
The invention discloses a wastewater treatment agent which comprises the following components in percentage by weight: 25-30% of activated carbon, 10-20% of nanoparticles, 10-25% of flocculant, 2-8% of microbial bacteria, 5-10% of zinc dihydrogen phosphate, 1-5% of hypochlorous acid, 5-10% of ferrosilicon copolymer, 1-5% of citric acid and 1-5% of ferrous sulfate. The invention also discloses a preparation method of the wastewater treatment agent. The wastewater treatment agent obtained by the preparation method has obvious COD and BOD removal rate and obvious effect, and is suitable for wide popularization.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a wastewater treatment agent and a preparation method thereof.
Background
With the development of society, the great discharge of industrial sewage and urban wastewater brings great challenges to the environment. Ammonia nitrogen and COD are mainly derived from domestic sewage and industrial wastewater. The waste water generated in different environments has great differences in ammonia nitrogen, COD content, pH value and conductivity, so that the waste water treatment agent and the water treatment method which are suitable for multiple industries are difficult to exist. The concentration of ammonia nitrogen and COD in the domestic sewage is lower, and the discharge requirement can be met through proper biochemical treatment. The ammonia nitrogen and COD concentration in the industrial wastewater is high, the source is wide, and the ammonia nitrogen content of the wastewater discharged by different production plants is greatly different. The high-concentration ammonia nitrogen wastewater mainly comes from the industries of petrochemical industry, nonferrous metal chemical metallurgy, chemical fertilizer, fine chemical industry, pharmaceutical chemical industry, meat processing, breeding and the like. Ammonia nitrogen is an important factor causing water eutrophication, and the discharge amount and toxicity are high; and COD can cause the deterioration of the water quality of the natural water body and destroy the water body balance. Both of them have great harm to water environment and are difficult to treat.
The existing water treatment agents can be divided into two types: the first is a chemical with a definite molecular structural formula and a compound name, which is a part of fine chemicals; the other is a water treatment agent compound formula product (hereinafter referred to as a 'compound product'), which has no definite molecular structural formula and compound name and is named by the characteristics of the application and the performance (usually called as a brand). One often refers to the first class of products as specialty water treatment agents and the second class of products as specialty water treatment agents. The water treatment agent plays a significant role in the water treatment process. The existing water treatment products mainly comprise scale inhibitors, corrosion inhibitors, bactericides, cleaning agents, pre-filming agents, chelating agents, dispersing agents and other series products, and a plurality of products are often matched for use to enable sewage to be better treated. Most of the current products are mainly compound products.
For example, a Chinese patent with the application number of CN201710565025.X discloses a wastewater treatment agent and a wastewater treatment method thereof, and the wastewater treatment process is easy to control, the treatment period is short, and the treatment effect is obviously improved by adjusting the formulas of a corrosion inhibitor, a scale inhibitor, a bactericide and a flocculating agent and adding an auxiliary agent; the wastewater treatment agent consists of a corrosion inhibitor, a scale inhibitor, a bactericide, a flocculating agent and an auxiliary agent; the corrosion inhibitor comprises sodium polyphosphate, calcium gluconate, alkyl epoxy carboxylic acid sodium, potassium iodide and gelatin; the scale inhibitor comprises trisodium phosphate, tannin, sodium humate, sulfonic acid copolymer and TH-0100 type reverse osmosis scale inhibitor; the bactericide comprises potassium permanganate, didodecyldimethylbenzyl tin ammonium chloride and nano zinc oxide; the flocculating agent comprises lignin, chitosan, quaternary amine type cationic starch, polyaluminium chloride, polyferric sulfate and diatomite; the auxiliary agents include: polyaspartic acid and alkyl epoxy carboxylate; experimental results show that the wastewater treatment reagent has a good effect.
If the application number is as follows: the Chinese patent of CN201811610323.7 discloses an industrial wastewater treating agent, a preparation method and an application method thereof, wherein the treating agent is prepared from the following raw materials in parts by weight: 40-50 parts of activated clay, 15-22 parts of coal gangue, 3-7 parts of hazelnut shell activated carbon, 5-8 parts of activated sludge, 5-8 parts of microcrystalline cellulose, 9-11 parts of microbial inoculum, 6-10 parts of fulvic acid, 5-9 parts of modified ash moss, 0.5-2 parts of polyacrylamide and 900 parts of aqueous agent 700-. The invention also discloses a preparation method and application of the industrial wastewater treatment agent. The industrial wastewater treating agent prepared by the invention can be used for debugging industrial wastewater and treating sudden accidents, and toxic and harmful substances in the wastewater treated by the wastewater treating agent can be greatly reduced, so that the capability of microorganisms adapting to the industrial wastewater is enhanced.
Most of the wastewater treatment agents used by the existing wastewater treatment agents cause secondary pollution to the environment, and in addition, the existing wastewater treatment agents are generally higher in price, so that the development of the environmental protection industry of China is hindered. Based on the above-mentioned revelation of the prior art, the inventor of the present invention is based on the practice experience and professional knowledge that are abundant for many years in the design and manufacture of such products, and actively conducts innovative research to construct a wastewater treatment agent and a preparation method thereof, which can effectively improve the prior art. The inventor of the invention finally creates the invention with practical value after continuous research and design and repeated trial and improvement.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art and provide a wastewater treatment agent and a preparation method thereof. The wastewater treatment agent can effectively remove pollutants in wastewater, and has no secondary pollution; the preparation method is simple, easy to operate and suitable for industrial production.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
The invention provides a wastewater treatment agent which comprises the following components in percentage by weight: 25-30% of activated carbon, 10-20% of nanoparticles, 10-25% of flocculant, 2-8% of microbial bacteria, 5-10% of zinc dihydrogen phosphate, 1-5% of hypochlorous acid, 5-10% of ferrosilicon copolymer, 1-5% of citric acid and 1-5% of ferrous sulfate.
The wastewater treatment agent comprises the following components in percentage by weight: 28% of activated carbon, 15% of nanoparticles, 21% of flocculant, 5% of microbial bacteria, 8% of zinc dihydrogen phosphate, 3% of hypochlorous acid, 10% of ferrosilicon copolymer, 5% of citric acid and 5% of ferrous sulfate.
The wastewater treatment agent, wherein the nanoparticles are selected from any one of nano aluminum oxide, nano aluminum nitride, nano titanium dioxide, nano shell powder, nano graphene and nano montmorillonite or a mixture thereof.
The wastewater treatment agent, wherein the flocculant is selected from any one of aluminum sulfate, aluminum chloride, ferric sulfate and ferric chloride or a mixture thereof.
The wastewater treatment agent, wherein the flocculant is selected from any one of polyaluminium chloride, polyaluminium sulfate, polyferric chloride and polyferric sulfate or a mixture thereof.
The wastewater treatment agent, wherein the microorganism is prepared from the following strains by volume percent: 40-60% of pseudomonas menbergii, 20-30% of flavobacterium brucellosis and 20-30% of ochrobactrum anthropi.
The wastewater treatment agent, wherein the ferrosilicon copolymer is sodium silicate and ferrate according to a molar ratio of 3: 2 is polymerized.
The wastewater treatment agent, wherein the ferrate is potassium ferrate or sodium ferrate.
The present invention also provides a method for preparing a wastewater treatment agent, comprising the steps of:
s1, preparing a ferrosilicon copolymer: sodium silicate and ferrate are mixed according to a molar ratio of 3: 2, mixing uniformly to obtain a silicon-iron copolymer;
s2, preparing microbial bacteria: uniformly mixing pseudomonas mengoldii, flavobacterium brucellosis and ochrobactrum in a volume ratio of (40-60) to (20-30) to prepare a microbial liquid mixture;
s3, dispersing the activated carbon and the nanoparticles in deionized water according to the weight ratio of (25-30): (10-20) and performing ultrasonic dispersion on an ultrasonic instrument for 20-30 min, slowly heating the reaction system to 60-65 ℃, continuously stirring for reaction for 4-6 h, after the reaction is completed, centrifuging the reaction system to collect a lower-layer precipitate, washing the lower-layer precipitate for 2-3 times by using ethanol, then performing vacuum drying on the lower-layer precipitate, and crushing and grinding the lower-layer precipitate to the particle size of 100-200 meshes to obtain mixed powder;
s4, adding the mixed powder prepared in the step S3 into 0.1-0.5M HCl solution, then adding a flocculating agent, zinc dihydrogen phosphate, hypochlorous acid, citric acid and ferrous sulfate in nitrogen atmosphere, stirring and reacting for 20-30 min at 45-50 ℃, cooling to room temperature, dropwise adding 0.1-0.3M NaOH solution to adjust the pH value to 6-7, then adding a microbial liquid mixture and a ferrosilicon copolymer, and continuously stirring and reacting for 40-50 min in nitrogen atmosphere to obtain the wastewater treatment agent.
The preparation method comprises the step S4, wherein the flocculating agent, the zinc dihydrogen phosphate, the hypochlorous acid, the citric acid and the ferrous sulfate are mixed according to the weight ratio of (10-25): 5-10): 1-5: (1-5).
By the technical scheme, the invention at least has the following advantages: the wastewater treatment agent disclosed by the invention can play a role in coordination by compounding the raw materials, not only can continuously treat wastewater with higher concentration, but also obviously reduces the contents of COD, BOD and SS in the treated wastewater, and can repeatedly recycle produced water; the wastewater treatment agent disclosed by the invention does not generate secondary pollutants in the whole application process, so that the pollution problem of industrial production wastewater is solved; the wastewater treatment agent disclosed by the invention is simple in preparation process, good in treatment effect, stable in performance and good in effluent quality; effectively reduces the cost of water treatment, and has good economic benefit and wide social benefit.
In conclusion, the special wastewater treatment agent and the preparation method thereof have good treatment effect on pollutants in wastewater and have no secondary pollution. The method has the advantages and practical value, does not have similar design publication or use in the similar products and methods, is innovative, has larger improvement on the method or the function, has multiple enhanced efficacies compared with the prior products, is more practical and has wide industrial application value, and is a novel, improved and practical new design.
The foregoing is merely an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and the following is a detailed description of preferred embodiments of the present invention.
Detailed Description
In order to make the technical means, innovative features, objectives and effects of the present invention easily understood and appreciated, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the wastewater treatment agent disclosed by the invention, the wastewater treatment agent comprises the following components in percentage by weight: 25-30% of activated carbon, 10-20% of nanoparticles, 10-25% of flocculant, 2-8% of microbial bacteria, 5-10% of zinc dihydrogen phosphate, 1-5% of hypochlorous acid, 5-10% of ferrosilicon copolymer, 1-5% of citric acid and 1-5% of ferrous sulfate; preferably, 28% of activated carbon, 15% of nanoparticles, 21% of flocculant, 5% of microbial bacteria, 8% of zinc dihydrogen phosphate, 3% of hypochlorous acid, 10% of ferrosilicon copolymer, 5% of citric acid and 5% of ferrous sulfate.
According to the wastewater treatment agent, preferably, the nanoparticles are selected from any one of nano aluminum oxide, nano aluminum nitride, nano titanium dioxide, nano shell powder, nano graphene and nano montmorillonite or a mixture thereof.
According to the wastewater treatment agent, preferably, the flocculating agent is selected from any one of aluminum sulfate, aluminum chloride, ferric sulfate and ferric chloride or a mixture thereof.
According to the wastewater treatment agent, preferably, the flocculating agent is selected from any one of polyaluminium chloride, polyaluminium sulfate, polyferric chloride and polyferric sulfate or a mixture of the polyaluminium chloride, the polyaluminium sulfate and the polyferric sulfate.
According to the wastewater treatment agent, the microorganism bacteria are preferably prepared from the following bacterial strains in percentage by volume: 40-60% of pseudomonas menbergii, 20-30% of flavobacterium brucellosis and 20-30% of ochrobactrum anthropi.
According to the wastewater treatment agent, preferably, the ferrosilicon copolymer is sodium silicate and ferrate according to a molar ratio of 3: 2 is polymerized.
According to the wastewater treatment agent, preferably, the ferrate is potassium ferrate or sodium ferrate.
A method for preparing a wastewater treatment agent according to the present invention comprises the steps of:
s1, preparing a ferrosilicon copolymer: sodium silicate and ferrate are mixed according to a molar ratio of 3: 2, mixing uniformly to obtain a silicon-iron copolymer;
s2, preparing microbial bacteria: uniformly mixing pseudomonas mengoldii, flavobacterium brucellosis and ochrobactrum in a volume ratio of (40-60) to (20-30) to prepare a microbial liquid mixture;
s3, dispersing the activated carbon and the nanoparticles in deionized water according to the weight ratio of (25-30): (10-20) and performing ultrasonic dispersion on an ultrasonic instrument for 20-30 min, slowly heating the reaction system to 60-65 ℃, continuously stirring for reaction for 4-6 h, after the reaction is completed, centrifuging the reaction system to collect a lower-layer precipitate, washing the lower-layer precipitate for 2-3 times by using ethanol, then performing vacuum drying on the lower-layer precipitate, and crushing and grinding the lower-layer precipitate to the particle size of 100-200 meshes to obtain mixed powder;
s4, adding the mixed powder prepared in the step S3 into 0.1-0.5M HCl solution, then adding a flocculating agent, zinc dihydrogen phosphate, hypochlorous acid, citric acid and ferrous sulfate in nitrogen atmosphere, stirring and reacting for 20-30 min at 45-50 ℃, cooling to room temperature, dropwise adding 0.1-0.3M NaOH solution to adjust the pH value to 6-7, then adding a microbial liquid mixture and a ferrosilicon copolymer, and continuously stirring and reacting for 40-50 min in nitrogen atmosphere to obtain the wastewater treatment agent.
According to the preparation method of the invention, preferably, the flocculant, zinc dihydrogen phosphate, hypochlorous acid, citric acid and ferrous sulfate in the step S4 are in a weight ratio of (10-25): 5-10): 1-5: (1-5).
Example 1
Preparing a silicon iron copolymer: sodium silicate and sodium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 50:20:30 to prepare a microbial liquid mixture.
According to the weight parts, 28 parts of activated carbon and 15 parts of nano aluminum oxide are dispersed in deionized water and ultrasonically dispersed for 30 min on an ultrasonic instrument, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 5 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are dried in vacuum, and the lower-layer precipitates are crushed and ground to the particle size of 100-200 meshes, so that mixed powder is obtained.
Adding the prepared mixed powder into 0.3M HCl solution, then adding 21 parts of polyaluminium sulfate, 8 parts of zinc dihydrogen phosphate, 3 parts of hypochlorous acid, 5 parts of citric acid and 5 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 25 min at 50 ℃, cooling to room temperature, then dropwise adding 0.3M NaOH solution to adjust the pH to 6-7, then adding 5 parts of microbial liquid mixture and 10 parts of ferrosilicon copolymer, and continuously stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 2
Preparing a silicon iron copolymer: sodium silicate and sodium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 50:20:30 to prepare a microbial liquid mixture.
According to the weight parts, 30 parts of activated carbon and 10 parts of nano aluminum oxide are dispersed in deionized water and ultrasonically dispersed for 30 min on an ultrasonic instrument, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 5 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are dried in vacuum, and the lower-layer precipitates are crushed and ground to the particle size of 100-200 meshes, so that mixed powder is obtained.
Adding the prepared mixed powder into 0.3M HCl solution, then adding 25 parts of ferric chloride, 5 parts of zinc dihydrogen phosphate, 1 part of hypochlorous acid, 5 parts of citric acid and 3 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 25 min at 50 ℃, cooling to room temperature, then dropwise adding 0.3M NaOH solution to adjust the pH to 6-7, then adding 8 parts of microbial liquid mixture and 5 parts of ferrosilicon copolymer, and continuously stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 3
Preparing a silicon iron copolymer: sodium silicate and potassium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 50:20:30 to prepare a microbial liquid mixture.
According to the weight parts, 28 parts of activated carbon and 20 parts of nano aluminum nitride are dispersed in deionized water and ultrasonically dispersed on an ultrasonic instrument for 30 min, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 5 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are dried in vacuum, and the lower-layer precipitates are crushed and ground to the particle size of 100 meshes and 200 meshes, so that mixed powder is obtained.
Adding the prepared mixed powder into 0.3M HCl solution, then adding 25 parts of ferric chloride, 10 parts of zinc dihydrogen phosphate, 5 parts of hypochlorous acid, 5 parts of citric acid and 1 part of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 25 min at 50 ℃, cooling to room temperature, then dropwise adding 0.3M NaOH solution to adjust the pH to 6-7, then adding 2 parts of microbial liquid mixture and 10 parts of ferrosilicon copolymer, and continuously stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 4
Preparing a silicon iron copolymer: sodium silicate and potassium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 50:20:30 to prepare a microbial liquid mixture.
According to the weight parts, 30 parts of activated carbon and 20 parts of nano aluminum nitride are dispersed in deionized water and ultrasonically dispersed for 30 min on an ultrasonic instrument, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 5 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are dried in vacuum, and the lower-layer precipitates are crushed and ground to the particle size of 100 meshes and 200 meshes, so that mixed powder is obtained.
Adding the prepared mixed powder into 0.3M HCl solution, then adding 18 parts of ferric chloride, 10 parts of zinc dihydrogen phosphate, 3 parts of hypochlorous acid, 5 parts of citric acid and 3 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 25 min at 50 ℃, cooling to room temperature, then dropwise adding 0.3M NaOH solution to adjust the pH to 6-7, then adding 5 parts of microbial liquid mixture and 8 parts of ferrosilicon copolymer, and continuously stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 5
Preparing a silicon iron copolymer: sodium silicate and potassium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 60:20:20 to prepare a microbial liquid mixture.
According to the weight portion, 25 portions of activated carbon and 15 portions of nano aluminum nitride are dispersed in deionized water and are ultrasonically dispersed for 25 min on an ultrasonic instrument, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 4 h, after the reaction is completed, the reaction system is centrifuged to collect the lower-layer precipitate, the lower-layer precipitate is washed for 2-3 times by ethanol, then the lower-layer precipitate is vacuum-dried, and is crushed and ground to the particle size of 100-200 meshes, so that the mixed powder is obtained.
Adding the prepared mixed powder into 0.5M HCl solution, then adding 20 parts of polyaluminum chloride, 8 parts of zinc dihydrogen phosphate, 3 parts of hypochlorous acid, 5 parts of citric acid and 5 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 30 min at 45 ℃, cooling to room temperature, then dropwise adding 0.2M NaOH solution to adjust the pH to 6-7, then adding 5 parts of microbial solution mixture and 10 parts of ferrosilicon copolymer, and continuing stirring and reacting for 45 min under nitrogen atmosphere, thus obtaining the wastewater treatment agent.
Example 6
Preparing a silicon iron copolymer: sodium silicate and potassium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 60:30:10 to prepare a microbial liquid mixture.
According to the weight parts, 30 parts of activated carbon and 10 parts of nano titanium dioxide are dispersed in deionized water and ultrasonically dispersed for 30 min on an ultrasonic instrument, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 4 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are dried in vacuum, and the crushed and ground particles are 100-mesh and 200-mesh, so that mixed powder is obtained.
Adding the prepared mixed powder into 0.1M HCl solution, then adding 25 parts of polyaluminum chloride, 5 parts of zinc dihydrogen phosphate, 1 part of hypochlorous acid, 5 parts of citric acid and 3 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 20 min at 50 ℃, cooling to room temperature, dropwise adding 0.1M NaOH solution to adjust the pH to 6-7, then adding 8 parts of microbial solution mixture and 5 parts of ferrosilicon copolymer, and continuously stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 7
Preparing a silicon iron copolymer: sodium silicate and sodium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunaeus, flavobacterium brucellosis and ochrobactrum according to the volume ratio of 50:25:25 to prepare a microbial liquid mixture.
According to the weight parts, 28 parts of activated carbon and 20 parts of nano titanium dioxide are dispersed in deionized water and ultrasonically dispersed on an ultrasonic instrument for 25 min, then the reaction system is slowly heated to 65 ℃, the stirring reaction is continued for 6 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are subjected to vacuum drying, and the lower-layer precipitates are crushed and ground to the particle size of 100 meshes and 200 meshes to obtain mixed powder.
Adding the prepared mixed powder into 0.3M HCl solution, then adding 25 parts of polyaluminium sulfate, 10 parts of zinc dihydrogen phosphate, 5 parts of hypochlorous acid, 5 parts of citric acid and 1 part of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 20 min at 45 ℃, cooling to room temperature, then dropwise adding 0.1M NaOH solution to adjust the pH to 6-7, then adding 2 parts of microbial liquid mixture and 10 parts of ferrosilicon copolymer, and continuously stirring and reacting for 40 min under nitrogen atmosphere to obtain the wastewater treatment agent.
Example 8
Preparing a silicon iron copolymer: sodium silicate and sodium ferrate are mixed according to a molar ratio of 3: 2, uniformly mixing to obtain the ferrosilicon copolymer.
Preparing a microbial strain: uniformly mixing pseudomonas menbrunnensis, flavobacterium gibsonii and ochrobactrum anthropi according to the volume ratio of 40:30:30 to prepare a microbial liquid mixture.
According to the weight parts, 30 parts of activated carbon and 20 parts of nano titanium dioxide are dispersed in deionized water and ultrasonically dispersed on an ultrasonic instrument for 25 min, then the reaction system is slowly heated to 60 ℃, the stirring reaction is continued for 4 h, after the reaction is completed, the reaction system is centrifuged to collect lower-layer precipitates, ethanol is used for washing for 2-3 times, then the lower-layer precipitates are subjected to vacuum drying, and the lower-layer precipitates are crushed and ground to the particle size of 100 meshes and 200 meshes to obtain mixed powder.
Adding the prepared mixed powder into 0.1M HCl solution, then adding 18 parts of polyaluminum chloride, 10 parts of zinc dihydrogen phosphate, 3 parts of hypochlorous acid, 5 parts of citric acid and 3 parts of ferrous sulfate under nitrogen atmosphere, stirring and reacting for 30 min at 50 ℃, cooling to room temperature, then dropwise adding 0.1M NaOH solution to adjust the pH to 6-7, then adding 5 parts of microbial solution mixture and 8 parts of ferrosilicon copolymer, and continuing stirring and reacting for 50min under nitrogen atmosphere to obtain the wastewater treatment agent.
Test example 1 evaluation of wastewater treatment Effect of wastewater treatment agent
Test subjects: waste water discharged from paper mills.
Test drugs: the wastewater treatment agents of examples 1 to 8.
The test method comprises the following steps: the content change conditions of indexes such as COD, BOD, SS and metal ions of suspended matters in the wastewater before and after treatment are measured and specifically shown in Table 1.
TABLE 1 Change in pollution indexes before and after treatment
| Item | Input amount | COD | BOD | SS | pH | Color intensity |
| Waste water sample | -- | 3500 | 2100 | 1020 | 12.5 | 117 |
| Example 1 | 80 | 75 | 15 | 62 | 7.2 | 25 |
| Example 2 | 80 | 79 | 17 | 65 | 7.5 | 27 |
| Example 3 | 80 | 80 | 16 | 69 | 7.1 | 36 |
| Example 4 | 80 | 87 | 15 | 70 | 6.9 | 34 |
| Example 5 | 80 | 78 | 15 | 68 | 7.2 | 29 |
| Example 6 | 80 | 78 | 17 | 65 | 7.9 | 30 |
| Example 7 | 80 | 85 | 20 | 69 | 8.1 | 36 |
| Example 8 | 80 | 86 | 16 | 68 | 6.9 | 33 |
As can be seen from the results in Table 1, the wastewater treatment agent of the present invention has a good pollution treatment effect, high COD and BOD removal rates, and significantly improved other pollution indexes before and after treatment.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The waste water treatment agent comprises the following components in percentage by weight: 25-30% of activated carbon, 10-20% of nanoparticles, 10-25% of flocculant, 2-8% of microbial bacteria, 5-10% of zinc dihydrogen phosphate, 1-5% of hypochlorous acid, 5-10% of ferrosilicon copolymer, 1-5% of citric acid and 1-5% of ferrous sulfate.
2. The wastewater treatment agent according to claim 1, wherein the wastewater treatment agent comprises the following components in percentage by weight: 28% of activated carbon, 15% of nanoparticles, 21% of flocculant, 5% of microbial bacteria, 8% of zinc dihydrogen phosphate, 3% of hypochlorous acid, 10% of ferrosilicon copolymer, 5% of citric acid and 5% of ferrous sulfate.
3. The wastewater treatment agent according to claim 1, wherein the nanoparticles are selected from any one of nano aluminum oxide, nano aluminum nitride, nano titanium dioxide, nano shell powder, nano graphene, nano montmorillonite or a mixture thereof.
4. A wastewater treatment agent according to claim 1, wherein the flocculating agent is selected from any one of aluminium sulphate, aluminium chloride, ferric sulphate, ferric chloride or mixtures thereof.
5. The wastewater treatment agent according to claim 1, wherein the flocculant is selected from any one of polyaluminium chloride, polyaluminium sulfate, polyferric chloride, polyferric sulfate or a mixture thereof.
6. A wastewater treatment agent according to claim 1, wherein the microbial bacteria are prepared from the following species in volume percent: 40-60% of pseudomonas menbergii, 20-30% of flavobacterium brucellosis and 20-30% of ochrobactrum anthropi.
7. The wastewater treatment agent according to claim 1, wherein the ferrosilicon copolymer is sodium silicate and ferrate in a molar ratio of 3: 2 is polymerized.
8. The wastewater treatment agent of claim 7, wherein the ferrate is potassium ferrate or sodium ferrate.
9. A method of preparing the wastewater treatment agent of any of claims 1 to 8, comprising the steps of:
s1, preparing a ferrosilicon copolymer: sodium silicate and ferrate are mixed according to a molar ratio of 3: 2, mixing uniformly to obtain a silicon-iron copolymer;
s2, preparing microbial bacteria: uniformly mixing pseudomonas mengoldii, flavobacterium brucellosis and ochrobactrum in a volume ratio of (40-60) to (20-30) to prepare a microbial liquid mixture;
s3, dispersing the activated carbon and the nanoparticles in deionized water according to the weight ratio of (25-30): (10-20) and performing ultrasonic dispersion on an ultrasonic instrument for 20-30 min, slowly heating the reaction system to 60-65 ℃, continuously stirring for reaction for 4-6 h, after the reaction is completed, centrifuging the reaction system to collect a lower-layer precipitate, washing the lower-layer precipitate for 2-3 times by using ethanol, then performing vacuum drying on the lower-layer precipitate, and crushing and grinding the lower-layer precipitate to the particle size of 100-200 meshes to obtain mixed powder;
s4, adding the mixed powder prepared in the step S3 into 0.1-0.5M HCl solution, then adding a flocculating agent, zinc dihydrogen phosphate, hypochlorous acid, citric acid and ferrous sulfate in nitrogen atmosphere, stirring and reacting for 20-30 min at 45-50 ℃, cooling to room temperature, dropwise adding 0.1-0.3M NaOH solution to adjust the pH value to 6-7, then adding a microbial liquid mixture and a ferrosilicon copolymer, and continuously stirring and reacting for 40-50 min in nitrogen atmosphere to obtain the wastewater treatment agent.
10. The method as claimed in claim 9, wherein the flocculating agent, zinc dihydrogen phosphate, hypochlorous acid, citric acid and ferrous sulfate in the step S4 are in a weight ratio of (10-25): 5-10): 1-5: (1-5): 1-5.
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