CN104370413A - Papermaking wastewater treatment method by use of modified fly ash zeolite - Google Patents
Papermaking wastewater treatment method by use of modified fly ash zeolite Download PDFInfo
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- CN104370413A CN104370413A CN201410570440.0A CN201410570440A CN104370413A CN 104370413 A CN104370413 A CN 104370413A CN 201410570440 A CN201410570440 A CN 201410570440A CN 104370413 A CN104370413 A CN 104370413A
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- coal ash
- waste water
- modified coal
- ash zeolite
- wastewater treatment
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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
- C02F1/28—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
- C02F1/66—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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
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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
Abstract
The invention relates to a papermaking wastewater treatment method by use of modified fly ash zeolite. The papermaking wastewater treatment method mainly comprises the wastewater treatment process of adjusting the PH of the wastewater, adsorbing by use of the modified fly ash zeolite, recovering fibers, adsorbing by use of the modified fly ash zeolite, and performing biodegradation. The modified fly ash zeolite adopted in the papermaking wastewater treatment method is prepared by virtue of modifier solution preparation, fly ash pulverization and modification reaction. The papermaking wastewater treatment method by use of the modified fly ash zeolite has the advantages of low cost and good wastewater treatment effect, and is advantageous for factory polarization and application.
Description
Technical field
The present invention relates to a kind of pulping wastewater treatment method using modified coal ash zeolite, belong to field of industrial waste water treatment.
Background technology
Paper industry is large, the heavy-polluted industry of water consumption, the organism (i.e. COD) of paper waste discharge accounts for China's trade effluent total amount of organic about 25%, serious environment pollution, therefore, paper making wastewater zero discharge is the production practical technique that a water saving and pollution treatment are laid equal stress on, having good economic benefit, also have obvious social benefit and environmental benefit, is also the necessary choice that paper industry realizes Sustainable development.
Paper-making industry traditional uses water rich and influential family, is also one of important source of pollution causing water pollutions.Along with expanding economy, enterprise faces the problem such as shortage of water resources, scarcity of raw material day by day, and on the other hand, water pollutions also can be caused more and more serious.The first place of current China paper-making industrial waste water quantity discharged and COD quantity discharged Jun Ju China all types of industries quantity discharged, paper industry is the most serious to the pollution of water surrounding.Paper pulp papermaking waste water mainly comprises the plain boiled water produced in cooking waste liquor (also known as black liquor), the middle section water produced in detergent bleach process and the copy paper operation that chemical method quality produces, and they all have serious pollution to environment.Therefore, how reducing the COD of paper pulp papermaking waste water, is a job with important social effect and economic benefit.
In current domestic paper mill, also do not have paper mill really to reach zero release, be generally 5% and put into discharge, what they adopted is waste water second-stage treatment, and first in either inside circulation, unnecessary water enters workshop retention basin, then pump suction coagulative precipitation tank is used, dosing precipitation process.Current water consumption per ton production about 15 cubic metres, working cost is relatively low, but still has part water periodic exhaustion.
The whole production process of pulp and paper industry needs a large amount of water, these water summarize a large amount of industry in process of production and are harmful to helpless, both cannot directly utilize, direct discharge pollutes the environment again, therefore, recycling is carried out to the waste water that pulp & paper process each stage produces, has significant economy and social value, decide the survival and development of papermaking enterprise.
Along with the development of science and technology, wastewater processing technology makes rapid progress, traditional wastewater processing technology is constantly reformed and is developed, now very right for the treatment process of paper pulp papermaking waste water, but paper mill great majority general at present remain or adopt traditional technique combined without words process and biochemical treatment.Wherein, materializing strategy has multiple method: By Bubble-floating Method, absorption method, Coagulation Method, electrolytic process, Fenton method etc., and biochemical processing method has: activated sludge process, biofiltration, biomembrance process, anaerobic biological process etc.
In paper industry, the treatment process centering water such as chemical precipitation, air-flotation process and bio-oxidation are usually adopted to process.
Current papermaking environmental protection coagulation traditional technology is just sink or materialization flocculation sediment, flocculation process clearance is higher, especially the organic pollutant of a large amount of polymer difficult degradation can be removed, this lays a good foundation for next step carries out biochemical treatment, but such process is only used in the lower waste water of load.European countries are the most advanced on materializing strategy, substantially eliminate horizontal sedimentation tank, adopt the precipitation technology that plusator, sludge blanket clarifier and high dense settling pond etc. are advanced.
In recent years, microbial film ultra-filtration technique, reverse osmosis, electrodialysis, ion exchange treatment means constantly occur.In paper industry, on the one hand because processing cost is too high, on the other hand due to paper waste complicated component, treatment technology difficulty is very large, therefore, does not still have industrialized ripe treatment technology to use so far.
Such as, Authorization Notice No. is the recoverying and utilizing method that the patent of invention of CN101186418A discloses a kind of paper-making industrial waste water, and the method is by membrane technique and Treatment of Industrial Water combine with technique, and concrete grammar comprises: micro-filtration process section, ultrafiltration technology section, and reverse osmosis membrane process section.Owing to needing first to carry out biochemical treatment, ultrafiltration technology section before micro-filtration process section, and reverse osmosis process section needs to adopt reverse osmosis membrane.Therefore, cost of water treatment is too high, in addition, quite strict to the requirement of water in the implementation process of the method, therefore, for paper waste complicated component is changeable, is difficult to industrialization.
Authorization Notice No. is the decoloring method that the patent of invention of CN1255340C discloses water in a kind of papermaking, and adopt oxygen, dioxide peroxide, and flocculation agent processes water in biochemical treatment respectively, so that obtain can the purifying waste water of reuse.But the method needs to use dioxide peroxide, its this province is exactly a kind of chemical agent forbidden gradually at present.The method needs precipitation for a long time in addition, long processing period.
It is a kind of to pulping wastewater treatment and the method for recycle that Authorization Notice No. is that the patent of invention of CN100545108C discloses, and comprises the steps such as wet pulp recovery, coagulating sedimentation, three-phase anaerobic treatment, desulfurization, Biology-iron technology process, filter-sterilized and cyclically utilizing.The present invention first carries out pre-treatment to paper waste, again Biology-iron technology process is carried out to pretreated water outlet, make active sludge form close structure, particle is tiny, specific surface area is large, dehydration property is good granule shape pastes mud, recycling A/O active sludge processing system carries out biochemical action.But the condition of three-phase anaerobic treatment is difficult to control in the method, in actual industrialization application, is difficult to the effect reaching thorough anaerobic reaction, make the flow process of whole wastewater treatment meets principle, but in practical application, water treatment effect is unsatisfactory.
Summary of the invention
In order to solve above-mentioned Problems existing, the invention discloses a kind of pulping wastewater treatment method using modified coal ash zeolite, the present invention is mainly through solid particulate matter, COD, BOD in modified coal ash zeolite treatment waste water and the limpid degree improving waste water, the cost of wastewater treatment is low, water treatment effect is better, can reach the standard of waste water recycling or discharge.
Use a pulping wastewater treatment method for modified coal ash zeolite, it is characterized in that comprising the following steps:
(1) regulate the PH of waste water: in waste water, drop into acid ion, the PH regulating waste water is 5.5 ~ 6.5;
(2) absorption of modified coal ash zeolite: be transported in the reaction tank taking up modified coal ash zeolite by the waste water of step (1) gained, waste water fully contacts with modified coal ash zeolite;
(3) fiber recovery: the waste water obtained after step (2) process is transported in fiber recovery machine and carries out fiber recovery;
(4) absorption of modified coal ash zeolite: by the waste water after step (3) fiber recovery again with modified coal ash zeolitic contact, carry out absorption reaction, remove the particulate matter of waste water, remove pigment, improve the limpid degree of waste water;
(5) biological degradation: the waste water after step (4) process is carried out biodeposition, removes COD and BOD in waste water, make waste water reach reuse or emission standard.
Described modified coal ash zeolite obtains through following steps:
A the preparation of () modifier solution: mix acidic solution, makes the pH value of acidic solution be 5 ~ 7;
(b) comminuted powder coal ash: rejected fly ash is ground, makes maximum particle diameter be not more than 1cm;
C () modified-reaction: rendered to by the flyash of step (b) gained in the modifier solution of step (a) gained, fully after reaction, filters and obtains modified coal ash zeolite.
PH is regulated to use hydrochloric acid soln in described step (1).
In described step (2) and step (4), modified coal ash zeolite and waste water react in process and constantly stir, and the reaction times is 1 ~ 2.5 hour.
Described step (3) fiber recovery uses disk fiber recoverer.
Described step (a) uses the mixing solutions of hydrochloric acid and sulfuric acid to regulate PH, and the volume ratio of hydrochloric acid and sulfuric acid is 1:1 ~ 2.
In described step (c) modified-reaction, stirring powder coal ash and modifier solution.
Principle of work of the present invention is:
(1) pH value of waste water is regulated, waste water is made to be acid, be conducive to improving the adsorptive power of modified coal ash zeolite in waste water, reach better adsorption effect, modified coal ash zeolite is by constantly stirring, fully contact with waste water, allow modified coal ash zeolite and waste water reaction 1 ~ 2.5 hour, modified coal ash zeolite reaches absorption state of saturation substantially;
(2) fiber in disk fiber recoverer recovery waste water is utilized, fiber is avoided to waste, and entering the adsorption of the waste water in disk fiber recoverer through modified coal ash zeolite, the granule foreign in waste water reduces, and is conducive to the purity improving fiber recovery;
(3) waste water after fiber recovery, again through the adsorption treatment of modified coal ash zeolite, removes SS, COD, the BOD remained in waste water and other particulate matter again, improves the limpid degree of waste water;
(4) biological degradation purifying waste water processing, removes the materials such as SS, COD, the BOD remained in waste water comparatively up hill and dale by the Degradation of bacterium, finally allows waste water reach the standard of reuse and discharge.
Beneficial effect of the present invention:
1. cost is low, and modified coal ash zeolite is the waste water conditioner that a kind of cost is very low, by stirring and regulating the pH value of waste water, reaches good water treatment effect;
2. recycled fiber, by disk fiber recoverer recycled fiber, avoids fibre resources to waste, can re-use;
3. whole treating processes is efficient, good to the treatment effect of waste water, can pour into discharge and recovery standard.
Accompanying drawing explanation
Fig. 1 is method flow schematic diagram of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further.Following embodiment should be understood only be not used in for illustration of the present invention and limit the scope of the invention.
Fig. 1 is method flow schematic diagram of the present invention, visible by reference to the accompanying drawings, the present invention mainly comprise regulate the PH of waste water, modified coal ash zeolite absorption, fiber recovery, the absorption of modified coal ash zeolite and biodegradable wastewater treatment operation, the administering method of each operation is specially:
(1) regulate the PH of waste water: in waste water, drop into acid ion, the PH regulating waste water is 5.5 ~ 6.5;
(2) absorption of modified coal ash zeolite: be transported in the reaction tank taking up modified coal ash zeolite by the waste water of step (1) gained, waste water fully contacts with modified coal ash zeolite;
(3) fiber recovery: the waste water obtained after step (2) process is transported in fiber recovery machine and carries out fiber recovery;
(4) absorption of modified coal ash zeolite: by the waste water after step (3) fiber recovery again with modified coal ash zeolitic contact, carry out absorption reaction, remove the particulate matter of waste water, remove pigment, improve the limpid degree of waste water;
(5) biological degradation: the waste water after step (4) process is carried out biodeposition, removes COD and BOD in waste water, make waste water reach reuse or emission standard.
The modified coal ash zeolite that the present invention uses obtains through following steps:
A the preparation of () modifier solution: mix acidic solution, makes the pH value of acidic solution be 5 ~ 7;
(b) comminuted powder coal ash: rejected fly ash is ground, makes maximum particle diameter be not more than 1cm;
C () modified-reaction: rendered to by the flyash of step (b) gained in the modifier solution of step (a) gained, fully after reaction, filters and obtains modified coal ash zeolite.
PH is regulated to use hydrochloric acid soln in step of the present invention (1).
In step of the present invention (2) and step (4), modified coal ash zeolite and waste water react in process and constantly stir, and the reaction times is 1 ~ 2.5 hour, and modified coal ash zeolite is fully adsorbed, the utilising efficiency of raising modified coal ash.
Step of the present invention (3) fiber recovery uses disk fiber recoverer, and disk fiber recoverer technology maturation is convenient to amendment and maintenance.
The preparation process (a) of the modified coal ash zeolite that the present invention uses uses the mixing solutions of hydrochloric acid and sulfuric acid to regulate PH, and the volume ratio of hydrochloric acid and sulfuric acid is 1:1 ~ 2, and allotment is convenient.
In preparation process (c) modified-reaction of the modified coal ash zeolite that the present invention uses, stirring powder coal ash and modifier solution.Stir and improve reaction efficiency.
Technique means disclosed in the present invention program is not limited only to the technique means disclosed in above-mentioned technique means, also comprises the technical scheme be made up of above technical characteristic arbitrary combination.
Claims (7)
1. use a pulping wastewater treatment method for modified coal ash zeolite, it is characterized in that comprising the following steps:
(1) regulate the PH of waste water: in waste water, drop into acid ion, the PH regulating waste water is 5.5 ~ 6.5;
(2) absorption of modified coal ash zeolite: be transported in the reaction tank taking up modified coal ash zeolite by the waste water of step (1) gained, waste water fully contacts with modified coal ash zeolite;
(3) fiber recovery: the waste water obtained after step (2) process is transported in fiber recovery machine and carries out fiber recovery;
(4) absorption of modified coal ash zeolite: by the waste water after step (3) fiber recovery again with modified coal ash zeolitic contact, carry out absorption reaction, remove the particulate matter of waste water, remove pigment, improve the limpid degree of waste water;
(5) biological degradation: the waste water after step (4) process is carried out biodeposition, removes COD and BOD in waste water, make waste water reach reuse or emission standard.
2. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 1, is characterized in that described modified coal ash zeolite obtains through following steps:
A the preparation of () modifier solution: mix acidic solution, makes the pH value of acidic solution be 5 ~ 7;
(b) comminuted powder coal ash: rejected fly ash is ground, makes maximum particle diameter be not more than 1cm;
C () modified-reaction: rendered to by the flyash of step (b) gained in the modifier solution of step (a) gained, fully after reaction, filters and obtains modified coal ash zeolite.
3. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 1, is characterized in that regulating PH to use hydrochloric acid soln in described step (1).
4. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 1, to it is characterized in that in described step (2) and step (4) that modified coal ash zeolite and waste water react in process and constantly stir, the reaction times is 1 ~ 2.5 hour.
5. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 1, is characterized in that described step (3) fiber recovery uses disk fiber recoverer.
6. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 2, it is characterized in that described step (a) uses the mixing solutions of hydrochloric acid and sulfuric acid to regulate PH, the volume ratio of hydrochloric acid and sulfuric acid is 1:1 ~ 2.
7. the pulping wastewater treatment method of use modified coal ash zeolite according to claim 2, is characterized in that in described step (c) modified-reaction, stirring powder coal ash and modifier solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410570440.0A CN104370413A (en) | 2014-10-24 | 2014-10-24 | Papermaking wastewater treatment method by use of modified fly ash zeolite |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410570440.0A CN104370413A (en) | 2014-10-24 | 2014-10-24 | Papermaking wastewater treatment method by use of modified fly ash zeolite |
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| CN104370413A true CN104370413A (en) | 2015-02-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692593A (en) * | 2015-02-28 | 2015-06-10 | 江苏高科物流科技股份有限公司 | Treatment method applied to industrial wastewater |
| LU500847B1 (en) | 2021-11-11 | 2023-05-11 | Kolicevo Karton D O O | Use of hydrophilic zeolites in the production of cellulose-based (cardboard) packaging |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306849A (en) * | 2008-07-03 | 2008-11-19 | 山东轻工业学院 | Modification process of fly ash zeolite and wastewater treatment process for paper making |
| CN102923880A (en) * | 2012-10-26 | 2013-02-13 | 陕西科技大学 | Technology for increasing number of recycle of papermaking white water |
-
2014
- 2014-10-24 CN CN201410570440.0A patent/CN104370413A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306849A (en) * | 2008-07-03 | 2008-11-19 | 山东轻工业学院 | Modification process of fly ash zeolite and wastewater treatment process for paper making |
| CN102923880A (en) * | 2012-10-26 | 2013-02-13 | 陕西科技大学 | Technology for increasing number of recycle of papermaking white water |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692593A (en) * | 2015-02-28 | 2015-06-10 | 江苏高科物流科技股份有限公司 | Treatment method applied to industrial wastewater |
| LU500847B1 (en) | 2021-11-11 | 2023-05-11 | Kolicevo Karton D O O | Use of hydrophilic zeolites in the production of cellulose-based (cardboard) packaging |
| EP4180573A1 (en) | 2021-11-11 | 2023-05-17 | Kemijski Institut | Use of zeolites with low molar ratio of si to ai in the production of cellulose-based (cardboard) packaging |
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Application publication date: 20150225 |