CN105540724A - Novel compound decolorant and wastewater decolorizing treatment method applying same - Google Patents
Novel compound decolorant and wastewater decolorizing treatment method applying same Download PDFInfo
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- CN105540724A CN105540724A CN201610045696.9A CN201610045696A CN105540724A CN 105540724 A CN105540724 A CN 105540724A CN 201610045696 A CN201610045696 A CN 201610045696A CN 105540724 A CN105540724 A CN 105540724A
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/547—Tensides
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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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/12—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing nitrogen
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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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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides novel compound decolorant and a wastewater decolorizing treatment method applying the same. The novel compound decolorant is reasonable in component, wide in raw material source, low in application cost, high in decolorizing efficiency, good in decolorizing effect, high in safety, environmentally friendly, wide in applicability and capable of being applied to multiple fields and has extremely high popularization value. The wastewater decolorizing treatment method applying the same is reasonable, simple and convenient to apply.
Description
Technical field
The invention belongs to water treatment field, particularly, relate to a kind of NEW TYPE OF COMPOSITE discoloring agent, and apply the waste water decoloring treatment process of this NEW TYPE OF COMPOSITE discoloring agent.
Background technology
The water resources in the sizable area of current China is all in tension, and the problem of water resources shortage is severe gradually.Meanwhile, water pollutions has become more and more concerned problem, and waste water (sewage) processing pressure is also increasing.How to solve nervous and waste water (sewage) process of water resources and become a social concern being badly in need of solving.
But, a large amount of organic pollutants and pathogenic agent is contained in industrial sewage (waste water) and sanitary sewage (waste water), if not treated just discharge or process not thoroughly cause discharge not up to standard, harm will be produced to surrounding environment water body, and the healthy of people can be had a strong impact on.So strict process must be carried out to reduce the impact on environment, water body as far as possible to it.
Wherein, the decolouring link of sewage (waste water) is one of study hotspot problem of water treatment field always, Chinese patent CN104692471A provides a kind of preparation method of industrial discoloring agent, utilize silica gel of powder and spent pickle liquor as raw material, but its security of this discoloring agent is difficult to be protected, application limitation is larger simultaneously.Chinese patent CN104475036A provides the preparation method of a kind of industrial sewage waste water decoloring agent, Dyhard RU 100 and formaldehyde is utilized to be main raw material, prepare Dicyandiamine-formaldehyde condensation product as discoloring agent, but, Dicyandiamine-formaldehyde condensation product has acid and certain corrodibility, there is certain toxicity, stability and poor stability simultaneously, for tap water, food, medicine and other fields, there is many limitation.In addition, application number be 2003101155707 Chinese patent disclose the agent of a kind of Compound Water process oxidative decoloration, decoloured by the oxygenant such as hydrogen peroxide, ozone, its method mainly through chemical oxidation is decoloured, the oxide compound that easy formation is unfavorable to environment and human body is not beneficial, also easily causes chemical residue.In addition, also need to use complicated equipment and airtight space, reveal and also can cause serious social danger.
Summary of the invention
Goal of the invention: in order to overcome above deficiency, the invention provides a kind of NEW TYPE OF COMPOSITE discoloring agent and applies the waste water decoloring treatment process of this NEW TYPE OF COMPOSITE discoloring agent.
Technical scheme: in order to overcome the deficiencies in the prior art, the invention provides a kind of NEW TYPE OF COMPOSITE discoloring agent,
In components by weight percent, comprise following component:
Hair-keratin 30-50 part
Chitosan 15-20 part
Gac 5-10 part
Cats product 1-3 part
Atlapulgite 10-20 part
Anti-incrustation corrosion inhibitor 2-5 part.
NEW TYPE OF COMPOSITE discoloring agent of the present invention, component is reasonable, production is simple, is easy to produce, and this NEW TYPE OF COMPOSITE bleaching agent bleaching efficiency is high, good decolorizing effect, and security is high, and suitability is wide, may be used for multiple fields, has high promotional value.Wherein, a large amount of-COOH ,-NH is contained in hair-keratin
2,-OH isopolarity group also containing a large amount of peptide bonds (-CONH-) on main chain, and form is unbodied loose micelle.Under suitable condition, they and dye ions and intermolecularly produce electrostatic attraction, hydrogen bond, Van der Waals force and hydrophobic forces, thus absorbing dye or be embedded in micelle by dyestuff, reach the object of color in removing waste water through flocculation, coagulation.And chitosan raw material sources are wide, and environmental protection, have in structure be easy to modify-OH and-NH
2deng group, can be used as flocculation agent, sorbent material is applied to sewage disposal.Pollution substance in cats product and water is affine, adsorb and form hydrogen bond, and flocculate electronegative colloid, turbidity removal, decolouring.In it and surface charge, to make between particle easily to assemble, layering, strengthen the dehydration rate of mud, destroy emulsion; Can also in and thalline surface charge, make thalline assemble, layering; Can also chelating removing heavy metal ion.And the scale-inhibiting properties that anti-incrustation corrosion inhibitor is excellent, effectively can control the generation of incrustation scale; Also there is good corrosion inhibition.In addition, atlapulgite odorless, tasteless, nontoxic, absorption property is very strong, can be adsorbed with color substance, organic substance.
Further, above-mentioned NEW TYPE OF COMPOSITE discoloring agent, described hair-keratin is modification poultry feather Keratin sulfate or human hair's Keratin sulfate.The raw material sources of hair-keratin are wide, and environmental protection, utilization of waste material, turns waste into wealth, and application cost is low.
Further, above-mentioned NEW TYPE OF COMPOSITE discoloring agent, described cats product is cationic polyacrylamide or polymine.Wherein, cationic polyacrylamide has defecate and purify, sedimentation promotes, filter all multiactions such as promotion and thickening, and stable performance; And polymine has high absorbability, high tack and high-cation, good decolorizing effect.
Further, above-mentioned NEW TYPE OF COMPOSITE discoloring agent, described anti-incrustation corrosion inhibitor is poly aspartic acid and/or poly-epoxy succinic acid.The biological degradability of poly aspartic acid, poly-epoxy succinic acid is good, be environmentally friendly raw material, final degraded product is environmental sound.
Preferred as one of the present invention, above-mentioned NEW TYPE OF COMPOSITE discoloring agent, described gac is active carbon powder.Contact area is large, absorption, good decolorizing effect.
Further, above-mentioned NEW TYPE OF COMPOSITE discoloring agent, described active carbon powder is the active carbon powder by 300-500 mesh sieve.Good decolorizing effect.
The present invention also provides a kind of waste water decoloring treatment process applying described NEW TYPE OF COMPOSITE discoloring agent, comprises the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 20-50g NEW TYPE OF COMPOSITE discoloring agent;
(3) under room temperature condition, pH to 5-7 is regulated;
(4), after stirring 30-45min, 60-90min is left standstill;
(5) filter, complete desolventing technology.
The waste water decoloring treatment process of application NEW TYPE OF COMPOSITE discoloring agent of the present invention, method is reasonable, and simply, application is convenient, and the water after process can carry out discharging or recycling, the environmental disruption avoiding direct discharging of waste water to cause and human injury.Water recycling after process can reduce application cost, simultaneously can effective saving water resource.
Further, the waste water decoloring treatment process of above-mentioned application NEW TYPE OF COMPOSITE discoloring agent, stirring velocity is 200-500r/min.Be easy to realize, and it is low to consume energy.
Further, the waste water decoloring treatment process of above-mentioned application NEW TYPE OF COMPOSITE discoloring agent, described waste water comprises trade effluent or sanitary wastewater.Application Areas is wide, can apply various wastewater.
Further, the waste water decoloring treatment process of above-mentioned application NEW TYPE OF COMPOSITE discoloring agent, uses hydrochloric acid and/or sodium hydroxide to regulate pH.Application is convenient, and application cost is low.
Beneficial effect: compared with prior art, the present invention has the following advantages: NEW TYPE OF COMPOSITE discoloring agent of the present invention, and its component is reasonable, and raw material sources are wide, application cost is low, decolorizing efficiency is high, good decolorizing effect, and security is high, environmental protection, suitability is wide, may be used for multiple fields, has high promotional value.The waste water decoloring treatment process of application NEW TYPE OF COMPOSITE discoloring agent of the present invention, method is reasonable, and simply, application is convenient.
Embodiment
By several specific embodiment, will illustrate the present invention further below, these embodiments, just in order to describe the problem, are not a kind of restriction.
Embodiment 1
A decoloration treatment method for applicable industry waste water, comprises the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 20g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Modification poultry feather Keratin sulfate 30 parts
Chitosan 15 parts
Gac 5 parts
Cationic polyacrylamide 1 part
Atlapulgite 10 parts
Poly aspartic acid 2 parts;
Wherein, described gac is the active carbon powder by 300 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 5;
(4), with the speed of 200r/min, after stirring 30min, 60min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 2
Apply a decoloration treatment method for sanitary wastewater, comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 50g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Human hair's keratin 50 part
Chitosan 20 parts
Gac 10 parts
Polymine 3 parts
Atlapulgite 20 parts
Poly-epoxy succinic acid 5 parts;
Wherein, described gac is the active carbon powder by 500 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 7;
(4), with the speed of 500r/min, after stirring 45min, 90min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 3
Apply a decoloration treatment method for sanitary wastewater, comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 30g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Human hair's Keratin sulfate 30 parts
Chitosan 18 parts
Gac 8 parts
Polymine 1 part
Atlapulgite 15 parts
Poly aspartic acid 2 parts
Poly-epoxy succinic acid 3 parts;
Wherein, described gac is the active carbon powder by 400 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 6;
(4), with the speed of 400r/min, after stirring 35min, 80min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 4
A decoloration treatment method for applicable industry waste water, comprises the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 40g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Modification poultry feather keratin 50 part
Chitosan 16 parts
Gac 9 parts
Cationic polyacrylamide 3 parts
Atlapulgite 18 parts
Poly-epoxy succinic acid 2 parts;
Wherein, described gac is the active carbon powder by 400 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 7;
(4), with the speed of 300r/min, after stirring 40min, 70min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 5
A decoloration treatment method for applicable industry waste water, comprises the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 45g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Modification poultry feather Keratin sulfate 40 parts
Chitosan 17 parts
Gac 7 parts
Cationic polyacrylamide 2 parts
Atlapulgite 19 parts
Poly aspartic acid 5 parts;
Wherein, described gac is the active carbon powder by 500 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 6;
(4), with the speed of 450r/min, after stirring 38min, 65min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 6
Apply a decoloration treatment method for sanitary wastewater, comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 35g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Human hair's Keratin sulfate 40 parts
Chitosan 18 parts
Gac 9 parts
Polymine 2 parts
Atlapulgite 17 parts
Poly aspartic acid 1 part
Poly-epoxy succinic acid 1 part;
Wherein, described gac is be the active carbon powder by 300 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 5;
(4), with the speed of 350r/min, after stirring 30min, 85min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 7
A decoloration treatment method for applicable industry waste water, comprises the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 25g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Modification poultry feather Keratin sulfate 35 parts
Chitosan 19 parts
Gac 6 parts
Cationic polyacrylamide 3 parts
Atlapulgite 12 parts
Poly aspartic acid 3 parts;
Wherein, described gac is the active carbon powder by 300 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 5;
(4), with the speed of 250r/min, after stirring 30min, 75min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 8
Apply a decoloration treatment method for sanitary wastewater, comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 39g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Human hair's Keratin sulfate 45 parts
Chitosan 15 parts
Gac 10 parts
Polymine 2 parts
Atlapulgite 14 parts
Poly-epoxy succinic acid 4 parts;
Wherein, described gac is the active carbon powder by 400 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 7;
(4), with the speed of 500r/min, after stirring 45min, 80min is left standstill;
(5) filter, complete desolventing technology.
Embodiment 9
Apply a decoloration treatment method for sanitary wastewater, comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 30g NEW TYPE OF COMPOSITE discoloring agent;
Described NEW TYPE OF COMPOSITE discoloring agent, in components by weight percent, comprises following component:
Modification poultry feather Keratin sulfate 30 parts
Chitosan 20 parts
Gac 5 parts
Polymine 2 parts
Atlapulgite 13 parts
Poly aspartic acid 1 part
Poly-epoxy succinic acid 2 parts;
Wherein, described gac is the active carbon powder by 500 mesh sieves;
(3) under room temperature condition, hydrochloric acid and/or sodium hydroxide is used to regulate pH to 6;
(4), with the speed of 200r/min, after stirring 45min, 90min is left standstill;
(5) filter, complete desolventing technology.
The above is only several embodiments of invention, and it should be pointed out that for those skilled in the art, under the prerequisite not departing from inventive principle, can also make some improvement, these improvement also should be considered as protection scope of the present invention.
Claims (10)
1. a NEW TYPE OF COMPOSITE discoloring agent, is characterized in that: in components by weight percent, comprises following component:
Hair-keratin 30-50 part
Chitosan 15-20 part
Gac 5-10 part
Cats product 1-3 part
Atlapulgite 10-20 part
Anti-incrustation corrosion inhibitor 2-5 part.
2. NEW TYPE OF COMPOSITE discoloring agent according to claim 1, is characterized in that: described hair-keratin is modification poultry feather Keratin sulfate or human hair's Keratin sulfate.
3. NEW TYPE OF COMPOSITE discoloring agent according to claim 1, is characterized in that: described cats product is cationic polyacrylamide or polymine.
4. NEW TYPE OF COMPOSITE discoloring agent according to claim 1, is characterized in that: described anti-incrustation corrosion inhibitor is poly aspartic acid and/or poly-epoxy succinic acid.
5. NEW TYPE OF COMPOSITE discoloring agent according to claim 1, is characterized in that: described gac is active carbon powder.
6. NEW TYPE OF COMPOSITE discoloring agent according to claim 5, is characterized in that: described active carbon powder is the active carbon powder by 300-500 mesh sieve.
7. the waste water decoloring treatment process of the NEW TYPE OF COMPOSITE discoloring agent of application according to any one of claim 1-6, is characterized in that: comprise the following steps:
(1) waste water is gathered, collect after grille well pre-treatment;
(2) by every m
3waste water calculates, and adds 20-50g NEW TYPE OF COMPOSITE discoloring agent;
(3) under room temperature condition, pH to 5-7 is regulated;
(4), after stirring 30-45min, 60-90min is left standstill;
(5) filter, complete desolventing technology.
8. the waste water decoloring treatment process of application NEW TYPE OF COMPOSITE discoloring agent according to claim 7, is characterized in that: described stirring velocity is 200-500r/min.
9. the waste water decoloring treatment process of application NEW TYPE OF COMPOSITE discoloring agent according to claim 7, is characterized in that: described waste water comprises trade effluent or sanitary wastewater.
10. the waste water decoloring treatment process of application NEW TYPE OF COMPOSITE discoloring agent according to claim 7, is characterized in that: use hydrochloric acid and/or sodium hydroxide to regulate pH.
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| CN201610045696.9A CN105540724B (en) | 2016-01-25 | 2016-01-25 | A kind of NEW TYPE OF COMPOSITE decolorising agent and its waste water decoloring processing method using NEW TYPE OF COMPOSITE decolorising agent |
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| CN201610045696.9A CN105540724B (en) | 2016-01-25 | 2016-01-25 | A kind of NEW TYPE OF COMPOSITE decolorising agent and its waste water decoloring processing method using NEW TYPE OF COMPOSITE decolorising agent |
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Cited By (5)
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| CN109319905A (en) * | 2018-10-22 | 2019-02-12 | 新疆环境工程技术有限责任公司 | Decolorising agent for dyeing and printing sewage |
| CN110255780A (en) * | 2019-07-23 | 2019-09-20 | 武汉轻工大学 | A kind for the treatment of of dyeing/printing wastewaters and processing method |
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| CN108046440A (en) * | 2017-12-14 | 2018-05-18 | 张松 | A kind of bath sewage cleanser and its preparation method and application |
| CN108404875A (en) * | 2018-03-28 | 2018-08-17 | 齐鲁工业大学 | A kind of preparation method of ox hair protein sponge sorbing material for tanning dyeing waste liquid |
| CN108404875B (en) * | 2018-03-28 | 2020-11-06 | 齐鲁工业大学 | Preparation method of cow hair protein sponge adsorbing material for tanning dyeing waste liquid |
| CN108751561A (en) * | 2018-08-13 | 2018-11-06 | 浏阳市亿臻燃油有限公司 | A kind of oily wastewater regeneration cycle processing method and its system |
| CN109319905A (en) * | 2018-10-22 | 2019-02-12 | 新疆环境工程技术有限责任公司 | Decolorising agent for dyeing and printing sewage |
| CN110255780A (en) * | 2019-07-23 | 2019-09-20 | 武汉轻工大学 | A kind for the treatment of of dyeing/printing wastewaters and processing method |
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