CN107311385A - A kind of method for handling methylene blue waste water - Google Patents
A kind of method for handling methylene blue waste water Download PDFInfo
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- CN107311385A CN107311385A CN201710719023.1A CN201710719023A CN107311385A CN 107311385 A CN107311385 A CN 107311385A CN 201710719023 A CN201710719023 A CN 201710719023A CN 107311385 A CN107311385 A CN 107311385A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/484—Treatment of water, waste water, or sewage with magnetic or electric fields using electromagnets
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a kind of method for handling methylene blue waste water, the present invention in methylene blue waste water by adding tannic acid and zinc metal ion, add Magnaglo and flocculant again after mixing, magnetic flocculate is formed in the basic conditions, Magneto separate is carried out to magnetic flocculate through magnet, the effect purified to methylene blue waste water is reached.Beneficial effects of the present invention are：Simple to operate, decolorizing effect is notable, can effectively remove the soluble organic dyes in waste water from dyestuff and reduce the chemical oxygen consumption (COC) in water；Operating cost is low, process cycle is short, efficiency high, and technique is simple, will not produce secondary pollution after flocculation treatment, it is easy to promote.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, and in particular to a kind of method of processing methylene blue waste water.
Background technology
Methylene blue is a kind of important organic chemical synthesis dye of positive ion, is widely used in dyeing, can be used for
Fiber crops, silk fabric, the dyeing of paper and the coloring of bamboo and wood, it can also be used to the biological, dyeing of bacterial organisms and for manufacturing ink
Water and color lake etc..The extensive use of methylene blue industrially causes industrial wastewater containing methylene blue to cause other pure water bodys
Pollution.Printing and dyeing, weaving, dyestuff and the waste water that waits industry to be discharged have that water is big, complicated component, pollutant concentration are high, colourity
Deep the features such as, and with certain anti-oxidant, antibiont degradability, it has also become the important pollution sources in the major waters of China.It is organic
Not only colourity is high for waste water from dyestuff, and chemical oxygen consumption (COC) (COD) concentration is high in water, it is difficult to biodegradable, decolourizes difficult.And mostly
Number dyestuff also has toxicity, there is carcinogenic, teratogenesis and mutagenic effect.The current processing method containing organic dye waste water mainly has
Bioanalysis, Coagulation Method, oxidizing process, absorption method and membrane separation process etc..
The processing method generally existing handling process of existing organic dye waste water is cumbersome, processing time length, removal efficiency
It is low, the problem of processing cost is high.Raw material needed for flocculant or adsorbent manufacturing process used is more and expensive, preparation technology
It is complicated, the problems such as manufacturing cost is high.Waste water of the Biochemical method containing organic dyestuff is by factors such as pH value, temperature, kind of dyes
Influence, in addition sludge bulking, poly- the micelle easily reason such as disintegration so that the effect of biological treatment is not ideal enough.The operation of Coagulation Method
Costly, body refuse amount is big and dehydration is difficult, and applicable pH range is narrow, to hydrophilic dye poor processing effect.Oxidizing process into
This height, and catalyst can not reclaim, the shortcomings of conventional oxidant can also show that oxidability is not strong, there is selective oxidation,
And be readily incorporated impurity in processing procedure and cause secondary pollution.Absorption method is easily by the suspension in water, macromolecule pollutant, oil
Fat etc. influences, and adsorbent amount is big, costly.Membrane separation process is divided into electroosmose process, hyperfiltration, nano filtering process, ultrafiltration etc.,
Wherein electroosmose process, hyperfiltration, the advantage of nano filtering process are that clearance is high, can reclaim the dyestuff in waste water, and technique is simple, still
The cost of film used in itself is higher, and operating pressure is larger, causes the energy consumption of embrane method higher, have impact on its industrial applications.And pass
The ultrafiltration of system is larger due to membrane aperture, it is difficult to remove the organic pollution of low molecule amount, and removal efficiency is low.Flocculation decoloration method because
Investment cost is low, processing capacity is big, percent of decolourization is high and is widely used in the decolorization of high-concentration and high-chromaticity waste water.Existing wadding
Solidifying agent mainly has inorganic flocculating agent and the major class of organic flocculant two.Inorganic flocculating agent mainly has iron chloride, aluminum sulfate, polyaluminum sulfate
Iron etc., it has certain effect to removing the suspension in sewage, but does not have decolorization for deliquescent dyestuff in water, and
Consumption is big, efficiency is low.Organic flocculant mainly has the decolorization flocculation agent of polyacrylamide and chitosan etc., but because its price is high
Expensive, processing cost is high, and polyacrylamide has certain toxicity in itself, using being subject to certain restrictions.Due to highly concentrated high chroma
The water quality of waste water is sufficiently complex, and single flocculant is difficult to reach ideal effect, thus exploitation NEW TYPE OF COMPOSITE decolorization flocculation agent into
For the study hotspot in current water treatment field.
The content of the invention
In order to solve prior art presence deficiency, the invention provides it is a kind of handle methylene blue waste water method and its
Preparation method and application.The method for the processing methylene blue waste water that the present invention is made
It is an object of the invention to provide a kind of method for handling methylene blue waste water.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, the processing methylene blue waste water
Method comprise the following steps：
(1) tannic acid and zinc salt are added separately to mix and react in methylene blue waste water；
(2) reactant obtained in step (1) is adjusted into pH to 9-10 with alkaline aqueous solution, mixes and react to form blueness
Sediment；
(3) Magnaglo is added in the reactant obtained into step (2) and flocculant carries out flocculation sediment；
(4) flocculation sediment obtained in step (3) is separated and removed using magnet, completed to methylene blue waste water
Processing.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, it is described in step (1)
The concentration of methylene blue waste water is below 100mg/L；The tannic acid is vegatable tannin acid.The effective content of tannic acid is
80wt%, that is, the tannic acid added is mixture, and its tannic acid contained is 80wt%.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, it is single described in step (1)
The addition of peaceful acid is the tannic acid that 0.078-0.098mmol is added into every liter of methylene blue waste water.It is preferred that, every liter of methylene
0.088mmol tannic acid is added in base indigo plant waste water, or, 150mg tannic acid is directly added into every liter of methylene blue waste water
Solid matter.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, zinc described in step (1)
Salt is zinc chloride, zinc sulfate or zinc nitrate, and the addition of the zinc salt is addition 0.8mmol zinc in every liter of methylene blue waste water
Salt.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, alkali described in step (2)
Property the aqueous solution be sodium hydrate aqueous solution, the concentration of the sodium hydrate aqueous solution is 40%.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, described in step (3)
Magnaglo is ferroferric oxide powder.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, described in step (3)
Flocculant is ferric trichloride, ferric sulfate, bodied ferric sulfate, poly-ferric chloride, aluminum sulfate or polyaluminium sulfate.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, described in step (3)
The addition of Magnaglo is addition 1.25g Magnaglos in every liter of methylene blue waste water；The addition of the flocculant is every
Rise and 3.5mmol flocculants are added in methylene blue waste water.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, it is described in step (3)
Flocculation sediment is first to carry out whipping process, then carries out standing process, and the speed of the stirring is 150-200r/min, the stirring
Time be 10s-30s, time of the standing is 30s-50s.
According to the method for the processing methylene blue waste water of the embodiment of the present invention, wherein, it is described in step (4)
Magnet is permanent magnet or electromagnet.
Heretofore described tannic acid, zinc chloride, ferric trichloride, that ferroso-ferric oxide can be configured to finite concentration is water-soluble
Content in solution, can also be converted into the solids quality needed for every liter by liquid, directly add in proportion into solution above-mentioned solid
Body material.The addition of such as tannic acid is addition 0.088mmol or useless to every liter of methylene blue in every liter of methylene blue waste water
150mg tannic acid solid matters are directly added in water.
Vegatable tannin is also plant polyphenol, is the secondary metabolites of complicated relatively higher plant, is widely distributed in plant
It is interior, containing the more frequently seen plants of tannin more than 800 kinds, the high plant of more than 300 kind tannin contents is had found in China, is a class point
The important natural products that cloth is wide, wide in variety, quantity is big.Each construction unit of tannin molecule is by polycyclic aromatic core and activity
Functional group constitutes, and its active function groups includes：Phenolic hydroxyl group, hydroxyl, carboxyl etc..Due to having various active functional group in molecule,
Vegatable tannin has hydrophily, surface-active, ion-exchange capacity, complexing power and absorption dispersibility etc., therefore it can make
It is applied for flocculant, dirt dispersion agent, corrosion inhibiter, ion exchange resin in water process.Tannin can be with protein, many
Sugar, nonionic surfactant, metal ion (particularly heavy metallic salt) combine and produce precipitation；In addition, the tannin aqueous solution has half
The property of colloidal solution, threshing is negatively charged, and with electric potential, and tannin is natural macromolecular material in itself, and volume is big, holds
Flocculation sediment gets off in Yi Congshui, therefore, it is possible to applied to drinking water, waste water and Industrial Wastewater Treatment.The structure of known tannic acid
In contain substantial amounts of hydrophilic radical phenolic hydroxyl group, these groups have good to dye of positive ion molecule and heavy metal ion etc.
Compatibility, this mechanism for handling waste water from dyestuff with flocculence is consistent.
The method of the processing methylene blue waste water of the present invention, by adding certain density in methylene blue dye wastewater
Tannic acid and certain density special metal ion, add a certain amount of Magnaglo and flocculant again after being sufficiently stirred for,
It is sufficiently mixed under alkalescence condition and is allowed to form flocculate, producing efficient absorption with water Methylene Blue dye molecule acts on forming steady
Fixed magnetic flocculate, carries out Magneto separate to magnetic flocculate through magnet, methylene blue dye molecules is carried out only so as to reach
The effect of change.
Tannic acid and the tannin acid metal complex of divalence zinc metal ion formation, in the basic conditions, for cation
Coloured groups in waste water from dyestuff and colorful wastewater produce Electrostatic Absorption, make dye molecule or the de- steady formation graininess of colored group
Colored sediment.
The inventive method is implemented at normal temperatures, and handling process is simple and convenient to operate, cost is low, non-secondary pollution and technique
Combination is convenient, easily realizes automation mechanized operation and easy to spread.
The method of the processing methylene blue waste water of the present invention, can be played and other flocculants or adsorbent (organic high score
Son and metal ion) same effect, separative efficiency is high, reduces secondary pollution risk.
Beneficial effects of the present invention are：The method of the processing methylene blue waste water of the present invention, simple to operate, decolorizing effect shows
Write, can effectively remove the soluble organic dyes in waste water from dyestuff and reduce the chemical oxygen consumption (COC) in water (COD)；
The aqueous solution after flocculation treatment, the percent of decolourization of methylene blue waste water reaches more than 97%, chemical oxygen consumption (COC) (COD)
Clearance reaches more than 75%；
The method of the processing methylene blue waste water of the present invention, operating cost is low, process cycle is short, efficiency high, technique is simple,
Secondary pollution will not be produced after flocculation treatment, it is easy to promote.
In the method for the processing methylene blue waste water of the present invention, a certain amount of Magnaglo and flocculant such as tri-chlorination are added
Iron, ferric sulfate, polyiron sulfate, aluminum sulfate, aluminium chloride etc., can be with colored sediment formation magnetic flocculate, will using magnetic force
Sediment and water quick separating, the flocculate dewatering speed that sub-argument comes out are fast, and ferroferric oxide powder therein can be reclaimed again
And reuse, save input cost.
This method can remove chemical oxygen consumption (COC) (COD) concentration in the organic matter in waste water from dyestuff, reduction waste water simultaneously.
The biodegradable removal of tannic acid remained in water after processing, will not produce other harm to water body.
Embodiment
Technical scheme and effect are described in further details with reference to specific embodiment.
Instrument and chemical reagent are commercially available in the present invention, and each raw material used in the present invention is all that industry universal is former
Material.
Embodiment 1
A kind of method for handling methylene blue waste water, comprises the following steps：
(1) the methylene blue waste water 80ml for taking concentration to be 100mg/L is placed in beaker；
(2) addition concentration is 40g/L tannin aqueous acid 0.3ml in the solution first obtained to step (1) and concentration is
20g/L solder(ing)acid 0.4ml, at room temperature, 30s are stirred with 150r/min rotating speed, are well mixed, obtain dyestuff water-soluble
Liquid；
(3) pH of the aqueous dye solutions obtained with sodium hydroxide (NaOH) aqueous solution regulating step (2) that concentration is 40%
To 9,30s is stirred with 150r/min rotating speed, treats to form stable blue particle shape flocculate in solution；
(4) added in the aqueous solution with blue particle shape flocculate obtained again to step (3) in 1.25g/L ratio
Ferroso-ferric oxide (Fe3O4) powder 0.1g and concentration is 920g/L ferric trichlorides (Fecl3) aqueous solution 0.05ml, then be with concentration
40% sodium hydroxide (NaOH) adjusts wastewater pH to 9, stirs 30s with 150r/min rotating speed, stands after 30s, utilize magnet
Flocculate can realize flocculate from the aqueous solution after magnetic separation, 5min and efficiently separated.
Tannin aqueous acid used needs storage under matching while using, normal temperature to be not to be exceeded 12 hours, and storage for a long time can be single
Peaceful acid can be hydrolyzed, and influence treatment effect.
The aqueous solution after flocculation treatment, methylene blue solution percent of decolourization reaches more than 97%, and chemical oxygen consumption (COC) (COD) is gone
Except rate reaches more than 75%.
Embodiment 2
A kind of method for handling methylene blue waste water, comprises the following steps：
(1) the aqueous solution of methylene blue 80ml for taking concentration to be 100mg/L is placed in beaker.
(2) addition concentration is 40g/L tannin aqueous acid 0.3ml in the solution first obtained to step (1) and concentration is
20g/L solder(ing)acid 0.4ml, at room temperature, 30s are stirred with 200r/min rotating speed, are well mixed, obtain dyestuff water-soluble
Liquid.
(3) the aqueous dye solutions pH to 9-10 obtained with the NaOH aqueous solution regulating step (2) that concentration is 40%, with
200r/min rotating speed stirring 30s, after stable blue particle shape flocculate is formed in solution.
(4) ferroso-ferric oxide (Fe is added in 1.25g/L ratio in the aqueous solution obtained again to step (3)3O4) powder
0.1g and concentration are 920g/L ferric trichlorides (Fecl3) aqueous solution 0.05ml, then with concentration be 40% sodium hydroxide (NaOH)
PH to 9-10 is adjusted, 30s is stirred with 200r/min rotating speed, is stood after 30s, magnetic separation is carried out to flocculate using magnet,
Flocculate can be realized from the aqueous solution and efficiently separated after 1min.
Tannin aqueous acid used needs storage under matching while using, normal temperature to be not to be exceeded 12 hours, and storage for a long time can be single
Peaceful acid can be hydrolyzed, and influence treatment effect.
The assay method of indices：
Percent of decolourization is determined：Absorbance measuring instrument is ultraviolet-visible spectrophotometer, is existed using AAS
Set wavelength as measurement methylene blue waste water at 502nm before treatment after absorbance, percent of decolourization is calculated by formula.
Chemical oxygen consumption (COC) is determined：Using the determination method of national standard GB11914-89 CODs to methylene before and after the processing
COD (COD) in blue waste water is measured, and the COD (COD) for calculating methylene blue waste water before and after the processing is dense
Degree.
Water treatment effect such as table 1：
The water treatment effect parameter lookup table of table 1
As can be seen from Table 1, using the embodiment of the present invention 2 processing methylene blue waste water method, methylene blue goes
Except rate is 97.5%, chemical oxygen consumption (COC) clearance is 75.6%.
Embodiment 3
A kind of method for handling methylene blue waste water, comprises the following steps：
(1) the aqueous solution of methylene blue 80ml for taking concentration to be 50mg/L is placed in beaker；
(2) addition concentration is 40g/L tannin aqueous acid 0.3ml in the solution first obtained to step (1) and concentration is
20g/L solder(ing)acid 0.4ml, at room temperature, 30s are stirred with 150-200r/min rotating speed, are well mixed, obtain dyestuff water
Solution；
(3) with concentration for 40% the obtained aqueous dye solutions pH of sodium hydroxide (NaOH) aqueous solution regulating step (2) extremely
9-10,30s is stirred with 150-200r/min rotating speed, after stable blue particle shape flocculate is formed in solution；
(4) ferroso-ferric oxide (Fe is added in 1.25g/L ratio in the aqueous solution obtained again to step (3)3O4) powder
0.1g and concentration are 920g/L ferric trichlorides (Fecl3) aqueous solution 0.05ml, then adjust wastewater pH with the NaOH that concentration is 40%
To 9-10,2min is stirred with 150-200r/min rotating speed, stood after 30s, magnetic separation, 1- are carried out to flocculate using magnet
Flocculate can be realized from the aqueous solution and efficiently separated after 5min.
Tannin aqueous acid used needs storage under matching while using, normal temperature to be not to be exceeded 12 hours, and storage for a long time can be single
Peaceful acid can be hydrolyzed, and influence treatment effect.
The assay method of indices：
Percent of decolourization is determined：Absorbance measuring instrument is ultraviolet-visible spectrophotometer, is existed using AAS
Set wavelength as measurement methylene blue waste water at 502nm before treatment after absorbance, percent of decolourization is calculated by formula.
Chemical oxygen consumption (COC) is determined：Using the determination method of national standard GB11914-89 CODs to methylene before and after the processing
COD (COD) in blue waste water is measured, and the COD (COD) for calculating methylene blue waste water before and after the processing is dense
Degree.
The water treatment effect parameter lookup table of table 2
As can be seen from Table 2, using the embodiment of the present invention 3 processing methylene blue waste water method, methylene blue goes
Except rate is 97.8%, chemical oxygen consumption (COC) clearance is 77.5%.
Contrast experiment's example
A kind of method for handling methylene blue waste water, comprises the following steps：
(1) the aqueous solution of methylene blue 80ml for taking concentration to be 100mg/L is placed in beaker.
(2) it is 40g/L tannin aqueous acid 0.3ml to add concentration in the solution first obtained to step (1), without chlorination
Zinc, at room temperature, 30s is stirred with 150-200r/min rotating speed, is well mixed, obtains aqueous dye solutions.
(3) with concentration for 40% the obtained aqueous dye solutions pH of sodium hydroxide (NaOH) aqueous solution regulating step (2) extremely
9-10,30s is stirred with 150-200r/min rotating speed.
(4) ferroso-ferric oxide (Fe is added in 1.25g/L ratio in the aqueous solution obtained again to step (3)3O4) powder
0.1g and concentration are 920g/L ferric trichlorides (Fecl3) aqueous solution 0.05ml, then with concentration be 40% sodium hydroxide (NaOH)
The aqueous solution adjusts wastewater pH to 9-10, stirs 2min with 150-200r/min rotating speed, stands after 30s, using magnet to flocculation
Thing carries out magnetic separation, and methylene blue solution percent of decolourization is the chemical oxygen consumption (COC) rise in 0, waste water.
Tannin aqueous acid used needs storage under matching while using, normal temperature to be not to be exceeded 12 hours, and storage for a long time can be single
Peaceful acid can be hydrolyzed, and influence treatment effect.
The assay method of indices：
Percent of decolourization is determined：Absorbance measuring instrument is ultraviolet-visible spectrophotometer, is existed using AAS
Set wavelength as measurement methylene blue waste water at 502nm before treatment after absorbance, percent of decolourization is calculated by formula.
Chemical oxygen consumption (COC) is determined：Using the determination method of national standard GB11914-89 CODs to methylene before and after the processing
COD (COD) in blue waste water is measured, and the COD (COD) for calculating methylene blue waste water before and after the processing is dense
Degree.
The water treatment effect parameter lookup table of table 3
It can be seen from upper table 3 contrast experiment example without zinc chloride when, the percent of decolourization of methylene blue dye wastewater and
Clearance is zero, and this explanation is not when having zinc ion, and with metal ion substitution reaction, nothing can not occur for the phenolic hydroxyl group of tannic acid
Method formation tannic acid zinc metal complex；Also precipitation adsorption can not be produced in the basic conditions and is produced with methylene blue molecule quiet
Electro Sorb, it is impossible to make methylene blue molecule depart from from the aqueous solution and be effectively separated.Chemical oxygen consumption (COC) in waste water is
Increase, is due to that addition tannic acid is produced, due to not with zinc chloride formation metal complex, it is impossible to formation precipitate and from water
In separate, cause the increase of water body organism content.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. it is a kind of handle methylene blue waste water method, it is characterised in that the method for the processing methylene blue waste water include with
Lower step：
(1) tannic acid and zinc salt are added separately to mix and react in methylene blue waste water；
(2) reactant obtained in step (1) is adjusted into pH to 9-10 with alkaline aqueous solution, mixes and react to form blue precipitate
Thing；
(3) Magnaglo is added in the reactant obtained into step (2) and flocculant carries out flocculation sediment；
(4) flocculation sediment obtained in step (3) is separated and removed using magnet, complete the place to methylene blue waste water
Reason.
2. the method for processing methylene blue waste water according to claim 1, it is characterised in that in step (1), the methylene
The concentration of base indigo plant waste water is below 100mg/L；The tannic acid is vegatable tannin acid.
3. the method for processing methylene blue waste water according to claim 1, it is characterised in that tannin described in step (1)
The addition of acid is addition 0.088mmol tannic acid in every liter of methylene blue waste water.
4. the method for processing methylene blue waste water according to claim 1, it is characterised in that zinc salt described in step (1)
For zinc chloride, zinc sulfate or zinc nitrate, the addition of the zinc salt is addition 0.9mmol zinc salts in every liter of methylene blue waste water.
5. the method for processing methylene blue waste water according to claim 1, it is characterised in that alkaline described in step (2)
The aqueous solution is sodium hydrate aqueous solution, and the concentration of the sodium hydrate aqueous solution is 40%.
6. the method for processing methylene blue waste water according to claim 1, it is characterised in that the magnetic described in step (3)
Property powder be ferroferric oxide powder.
7. the method for processing methylene blue waste water according to claim 1, it is characterised in that the wadding described in step (3)
Agent is coagulated for ferric trichloride, ferric sulfate, bodied ferric sulfate, poly-ferric chloride, aluminum sulfate or polyaluminium sulfate.
8. according to the method for the processing methylene blue waste water described in claim 1, it is characterised in that the magnetic described in step (3)
The addition of powder is addition 1.25g Magnaglos in every liter of methylene blue waste water；The addition of the flocculant is every liter of Asia
3.5mmol flocculants are added in methyl blue waste water.
9. the method for processing methylene blue waste water according to claim 1, it is characterised in that in step (3), the flocculation
Be precipitated as first carrying out whipping process, then carry out standing process, the speed of the stirring is 150-200r/min, the stirring when
Between be 10s-30s, time of the standing is 30s-50s.
10. the method for processing methylene blue waste water according to claim 1, it is characterised in that in step (4), the magnetic
Iron is permanent magnet or electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710719023.1A CN107311385B (en) | 2017-08-21 | 2017-08-21 | Method for treating methylene blue wastewater |
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| US20050158840A1 (en) * | 2002-03-21 | 2005-07-21 | Council Of Scientific And Industrial Research | Biological process for colour reduction of pulp and paper effluent |
| CN101723501A (en) * | 2009-12-08 | 2010-06-09 | 哈尔滨工业大学 | Coagulation method for processing water body containing plant polyphenol tannate |
| CN105601057A (en) * | 2016-03-22 | 2016-05-25 | 湖南大学 | Method for treating methylene blue-containing wastewater |
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| US20050158840A1 (en) * | 2002-03-21 | 2005-07-21 | Council Of Scientific And Industrial Research | Biological process for colour reduction of pulp and paper effluent |
| CN101723501A (en) * | 2009-12-08 | 2010-06-09 | 哈尔滨工业大学 | Coagulation method for processing water body containing plant polyphenol tannate |
| CN105601057A (en) * | 2016-03-22 | 2016-05-25 | 湖南大学 | Method for treating methylene blue-containing wastewater |
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| J.SANCHEZ-MARTIN ET AL: "Novel tannin-based adsorbent in removing cationic dye (Methylene Blue) from aqueous solution.Kinetics and equilibrium studies", 《JOURNAL OF HAZARDOUS MATERIALS》 * |
| 谢彩锋等: "甘蔗混合汁单宁无硫澄清脱色机理的研究", 《甘蔗糖业》 * |
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