CN102285709A - Preparation method for ecological high-efficient complex flocculating agent - Google Patents
Preparation method for ecological high-efficient complex flocculating agent Download PDFInfo
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- CN102285709A CN102285709A CN2011102314495A CN201110231449A CN102285709A CN 102285709 A CN102285709 A CN 102285709A CN 2011102314495 A CN2011102314495 A CN 2011102314495A CN 201110231449 A CN201110231449 A CN 201110231449A CN 102285709 A CN102285709 A CN 102285709A
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Abstract
The invention relates to a preparation method for an ecological high-efficient complex flocculating agent. By the preparation method, the complex flocculating agent consisting of sodium carboxymethyl cellulose and inorganic aluminum salt is prepared by using the inorganic aluminum salt as a matrix basic material. The method comprises the following steps of: 1) mixing the sodium carboxymethyl cellulose with water and stirring to obtain transparent sticky sodium carboxymethyl cellulose solution; 2) mixing the inorganic aluminum salt with water to obtain polymeric aluminum salt solution; and 3) mixing the sodium carboxymethyl cellulose solution with the polymeric aluminum salt solution, stirring, and performing a complex reaction to obtain the light yellow emulsible complex flocculating agent. The preparation method has the advantages of: good flocculation effect, no secondary pollution and high ecological safety; the preparation method is simple, has mild reaction conditions, and is easy to extend to realize industrialized production; the preparation method is high in economic performance and low in cost, has wide synthetic raw material sources and meets the requirements on recycling economy and pollution-free production; and the preparation method has a wide applicable range, is suitable for various kinds of industrial wastewater and life wastewater, and even water supply industrial water, and the using range can be further extended by regulating formula proportions.
Description
Technical field
The present invention relates to sewage disposal and feedwater field, specifically a kind of preparation method who is used for the environmental composite highly effective composite flocculation agent of trade effluent or sanitary sewage disposal and drink water purifying.
Background technology
Current, the flocculation agent of widespread use can be divided into kinds such as inorganic flocculating agent, organic floculant, microbial flocculant and composite flocculation agent in sewage disposal.Wherein inorganic flocculating agent is cheap, and flocculating effect is better, is representative with aluminium salt, molysite and polymkeric substance thereof; Alumen ustum density and intensity that molysite forms are bigger, purifying water effect is remarkable, be subjected to the water temperature impact effect little, pH value use range is wide, some former water is had treatment effect preferably, but the molysite flocculation agent not only has intensive corrodibility, to the equipment requirements height, and easy residual iron ion, make treating water have color, influence treatment effect; When processing contains the more trade effluent of sulfide, the Fe in the molysite flocculation agent
3+Be reduced into Fe
2+, and combine with sulphur and to generate FeS and Fe
2S
3Mixture, make flocculation activity forfeiture.In addition, contain a large amount of mineral ions in the water body of being handled by the mineral-type flocculation agent, excessive mineral ion not only has influence on the mouthfeel of water quality, also is unfavorable for HUMAN HEALTH, thereby needs to increase desalination, deionization technology in the water supply process.The aluminum salt flocculant flocculating effect is also good, but aluminium wherein is after each channel enters human body, by accumulating and participating in many biochemical reactions, nutritive element essential in the body and trace element displacement can be run off or deposition, hinder and damage the physiological function at each position, cause human body to occur such as clinical poisoning by aluminum illnesss such as aluminum encephalopathy, aluminium osteopathy, aluminium anaemias.Simultaneously, the toxicity of aluminium salt also shows the toxic effect to hydrobiont, plant.When the concentration of aluminium is big, also may produce detrimentally affect to the microorganism in the biological wastewater treatment process.The World Health Organization is 0.2mg/L to the limitation standard of residual aluminum content in the water, and the U.S. is decided to be 0.05mg/L, and also in provisional water quality objective in 2000, the standard value that has increased aluminium is 0.2mg/L in China.
Organic floculant comprises synthetic polymeric flocculant and natural macromolecule flocculating agent.The synthetic polymeric flocculant is representative with the polyacrylamide, and they are popular on market because flocculating effect is good, adding less.But the flocculation agent of these types has also brought very big pressure to environment in production, use and subsequent disposal, and human beings'health has been constituted obviously or potential harm.Available data shows: the synthetic organic polymer coargulator polyacrylamide that range of application is the widest, usage quantity is maximum at present is a low toxicity, though most commodity are skin irritation not, but some hydrolysis body has remaining alkalescence, repeatedly, have pungency when contacting for a long time.But synthetic cost is high and in building-up process acrylamide monomer and the toxic heavy metal carried secretly very big to human health damage, use the most of polymer in back to be difficult to by environment degradable, a large amount of accumulation and long-term existence are brought huge pressure to environment in physical environment; Small portion can be degraded to small molecules such as acrylamide monomer then is a toxic substance, has abundant to studies have shown that it is a kind ofly to poison the very strong material of nervosa, and has very strong carinogenicity, and human health is constituted a threat to.Common people's toxicological harmless daily ingested dose is 0.5mg/kg.The polyacrylamide maximum permitted concentration of U.S.'s approval is 1.0mg/L, when levels of residual monomers surpasses 0.5% (mass ratio), just should stick the label of " poisonous substance " in the packing of product of PAM.It is 0.5mg/L that Britain's regulation polyacrylamide on average adds concentration, and maximum dosage must not surpass 1mg/L, and acrylamide should be less than 0.05% at the residual volume of polymkeric substance.
Natural macromolecule flocculating agent mainly comprises natural organic high-molecular materials such as starch, tannin, polyose, chitosan class, xylogen, Mierocrystalline cellulose and gelatin, makes by chemical modification.Because the natural organic high-molecular material has nontoxic, energy safe disposal and lower-price characteristic once once causing the attention of each scientific research institution, but pure natural polyose parent material molecular weight are lower and unstable, consumption is big, and flocculating effect is not good and might produce problems such as BOD.Both at home and abroad the researchist attempts the natural polysaecharides material with organic molecule grafting such as acrylamides, and the mixture that obtains has stronger flocculating effect.But the secondary pollution of acrylamide monomer and biology toxicity problem still fail effectively to be solved, the preparation process complexity, and production cost also so greatly raises.Causing for many years can real business-like product and few in this field.
Microbial flocculant is that a class is by the special polymer meta-bolites that is difficult for the coagulation sedimentations such as solid suspended particle, somatic cells and colloidal particle of degraded in the made liquid of microorganisms.Utilize biotechnology, by microbial fermentation, extracting, refining obtaining.But the screening of existing microbial bacterial, cultivate, fermentation and extract the method for agglutinating matter and production process complexity, production cost too high, present stage mostly also is in laboratory stage, it is also unrealistic to implement extensive industrialization.
Because traditional inorganic polymer flocculant and synthetic organic polymer flocculation agent exists some inherent shortcomings, microbial flocculant is large-scale application not always also, composite flocculation agent has obtained development rapidly in recent years, especially it can overcome many deficiencies of using single flocculation agent, had the advantage of single flocculation agent concurrently, wide accommodation, to lower concentration or high-concentration waste water, colorful wastewater, various industrial sewage, sanitary wastewaters etc. all have good decontamination effect improving, can also improve organic clearance in the flocculation process, and can reduce the kish ionic concn, reduce secondary pollution.Therefore, composite flocculation agent has development prospect very widely.Natural organic high-molecular flocculant is because molecular weight is big, active group is many, structure is diversified and raw material sources are extensive, cheap, be easy to characteristics such as biological degradation, non-secondary pollution, in recent years, be used for developing novel flocculant by the lot of domestic and foreign research worker.Problems such as though inorganic flocculating agent particularly polymer inorganic flocculating agent has consumption big, and sedimentation time is slow, and is residual, cheap with become production art relatively advantage such as maturation also make it that very big application space was still arranged in today.Inorganic-natural polymer composite flocculation agent has both advantages especially concurrently, therefore also is the focus of composite flocculation agent development.
Summary of the invention
The objective of the invention is at above-mentioned existing problems, provide a kind of economy, non-secondary pollution particularly to reduce the preparation method of the ecologic type high efficient composite flocculation agent of the ecological risk that causes because of aluminium by the usage quantity that reduces aluminium.
Technical solution of the present invention:
A kind of preparation method of environmental composite highly effective composite flocculation agent, with Xylo-Mucine and inorganic aluminate is raw material, water is as solvent, and inorganic aluminate is made the composite flocculation agent of being made up of Xylo-Mucine and inorganic aluminate as the parent base substance, and step is as follows:
1) preparation of carboxymethylcellulose sodium solution:
Xylo-Mucine is mixed with water, under 35 ℃～60 ℃ temperature, fully stir, make transparent sticking shape carboxymethylcellulose sodium solution;
2) preparation of polyaluminium salts solution:
With inorganic aluminate and the mixed polyaluminium salts solution that gets of water;
3) preparation of composite flocculation agent:
Under the high-speed stirring heated condition, with carboxymethylcellulose sodium solution and polymeric aluminum salt solution mix, in temperature is to stir under 35 ℃ of-95 ℃ of conditions, stirring velocity is 100 rev/mins～600 rev/mins, churning time is 5-60 minute, be under 40 ℃ of-80 ℃ of conditions in temperature then, carried out complex reaction 1～12 hour, make faint yellow emulsus composite flocculation agent.
The blending ratio of described Xylo-Mucine and water is that every gram Xylo-Mucine adds water 25～100mL.
Described inorganic aluminate is Tai-Ace S 150, aluminum chloride or aluminum nitrate.
The aluminium in the described inorganic aluminate and the mass ratio of water are 1: 10-800.
The aluminium in the described polyaluminium salts and the mass ratio of Xylo-Mucine are 1: 1-35.
Described faint yellow emulsus composite flocculation agent carries out making solid after the drying.
The present invention has the following advantages:
1. flocculating effect is good.Its reason be the flocculation initial stage by the carboxymethyl cellulose chain on bonded aluminium salt with positive charge by compression double electric layer process flocculation pollutants in waste water, be rich in the mixture subsequently that polyhydric Mierocrystalline cellulose macromolecular chain performance net is caught and the characteristic of building bridge makes that molecule and contaminants form big flocs unit in the water body, again because the molecular weight height of mixture, floc settlement speed is faster than existing like product, be in particular in: handle sanitary sewage with polymerize aluminum chloride in the prior art and compare, flocculating effect of the present invention is equivalent to 1-2.5 times of common commercially available flocculant poly aluminum chloride.
2. applied widely.Be applicable to various industrial sewage and sanitary wastewater, even the drinking water source of water supply industry, and can further enlarge use range by adjusting formula rate.
3. ecological security is good.The present invention is the polymeric flocculant that is made by industrial Xylo-Mucine of common building and aluminium salt, distinctive poly-hydroxy and inorganic aluminate are compound in the carboxymethyl cellulose, change aluminum ions combining form, the concentration of active aluminum is reduced greatly, the probability of small organic contamination deposits yields free radical reduces greatly in the aluminium salt ion catalysis water body, reduces to greatest extent even has eliminated aluminium salt toxicity.
4. non-secondary pollution.The employing Xylo-Mucine is a raw material, and the flocculation agent residue is easy to do not had the secondary pollution problem by the microbiological deterioration in the environment.
5. the preparation method is simple.This method is not high to equipment requirements, the reaction conditions gentleness, and making processes is simple, and different according to process object and sewage character are suitably adjusted formula rate, reach best treatment effect.Be easy to carry out industrialization, obtain economic profit.
6. economic performance is good, and cost is low.Xylo-Mucine and inorganic aluminate are synthesis material of the present invention, and the source is wide, and price is low.
Embodiment
The present invention is described in more detail below by embodiment.
Embodiment 1:
A kind of preparation method of environmental composite highly effective composite flocculation agent, step is as follows:
1) getting 1 gram Xylo-Mucine adds 25mL water and fully mixes and be made into carboxymethylcellulose sodium solution;
2) get polymerize aluminum chloride 5 grams, contain aluminium 0.667 gram, add 100mL water and be made into polyaluminium salts solution;
3), under 70 ℃ of temperature condition, slowly polyaluminium salts solution is joined in the carboxymethylcellulose sodium solution 300 rev/mins of magnetic agitation, stir and got mixed solution in 30 minutes, then mixed solution was put under 40 ℃ of water bath condition complex reaction 3 hours, faint yellow milk, i.e. product flocculating agent A.
Embodiment 2:
A kind of preparation method of environmental composite highly effective composite flocculation agent, step is as follows:
1) getting 1 gram Xylo-Mucine adds 25mL water and fully mixes and be made into carboxymethylcellulose sodium solution;
2) get polymerize aluminum chloride 5 grams, contain aluminium 0.667 gram, add 100mL water and be made into polyaluminium salts solution;
3), under the 80 ℃ of conditions of heating, slowly carboxymethylcellulose sodium solution is joined in the polyaluminium salts solution 300 rev/mins of magnetic agitation, stir and got mixed solution in 15 minutes, then mixed solution was placed under 50 ℃ of water bath condition complex reaction 5 hours, faint yellow milk, i.e. product flocculating agent B.
Embodiment 3:
A kind of preparation method of environmental composite highly effective composite flocculation agent, step is as follows:
1) getting 4 gram Xylo-Mucines adds 100mL water and fully mixes and be made into carboxymethylcellulose sodium solution;
2) get polymerize aluminum chloride 2 grams, contain aluminium 0.267 gram, add 40mL water and be made into polyaluminium salts solution;
3) 200 rev/mins of magnetic agitation, under the 70 ℃ of conditions of heating, slowly carboxymethylcellulose sodium solution is joined in the polyaluminium salts solution, stir and got mixed solution in 15 minutes; Then mixed solution was placed under 50 ℃ of water bath condition complex reaction 3 hours, faint yellow milk, i.e. product flocculation agent C.
Embodiment 4:
A kind of preparation method of environmental composite highly effective composite flocculation agent, step is as follows:
1) getting 1 gram Xylo-Mucine adds 25mL water and fully mixes and be made into carboxymethylcellulose sodium solution;
2) get polymerize aluminum chloride 10 grams, contain aluminium 0.155 gram, add 100mL water and be made into polyaluminium salts solution;
3) 200 rev/mins of magnetic agitation, heat under 80 ℃ of conditions, slowly polyaluminium salts solution is joined in the carboxymethylcellulose sodium solution, stir and got mixed solution in 20 minutes; Then mixed solution was placed under 40 ℃ of water bath condition complex reaction 5 hours, faint yellow milk, i.e. product flocculation agent D.
The Performance Detection of this composite flocculation agent:
With kaolin suspension liquid simulated wastewater, get the 1000mL simulated wastewater in each beaker, choose the muddy degree of simulated wastewater, pH value, wastewater temperature, stirring velocity, five factors of flocculant dosage, the design orthogonal test, use the coagulation test stirrer to test respectively to embodiment product A, B, C, D, after all test back simulated wastewaters leave standstill 20min, get, carry out water quality analysis apart from the supernatant liquor at liquid level 30mm place.Its absorbancy is in the detection that λ=the 540nm place carries out, and measures turbidity simultaneously.
For the transparence clearance of four kinds of example products, best flocculation scheme is as follows, and the transparence clearance can reach 60%-90%.
For the turbidity removal rate of four kinds of example products, best flocculation scheme is as follows, and turbidity removal rate can reach 50%-85%.
Claims (6)
1. the preparation method of an environmental composite highly effective composite flocculation agent, it is characterized in that: with Xylo-Mucine and inorganic aluminate is raw material, water is as solvent, and inorganic aluminate is made the composite flocculation agent of being made up of Xylo-Mucine and inorganic aluminate as the parent base substance, and step is as follows:
1) preparation of carboxymethylcellulose sodium solution:
Xylo-Mucine is mixed with water, under 35 ℃ ~ 60 ℃ temperature, fully stir, make transparent sticking shape carboxymethylcellulose sodium solution;
2) preparation of polyaluminium salts solution:
With inorganic aluminate and the mixed polyaluminium salts solution that gets of water;
3) preparation of composite flocculation agent:
Under the high-speed stirring heated condition, with carboxymethylcellulose sodium solution and polymeric aluminum salt solution mix, in temperature is to stir under 35oC-95oC condition, stirring velocity is 100 rev/mins ~ 600 rev/mins, churning time is 5-60 minute, be under 40 ℃ of-80 ℃ of conditions in temperature then, carried out complex reaction 1 ~ 12 hour, make faint yellow emulsus composite flocculation agent.
2. according to the preparation method of the described environmental composite highly effective composite flocculation agent of claim 1, it is characterized in that: the blending ratio of described Xylo-Mucine and water is that every gram Xylo-Mucine adds water 25 ~ 100mL.
3. according to the preparation method of the described environmental composite highly effective composite flocculation agent of claim 1, it is characterized in that: described inorganic aluminate is Tai-Ace S 150, aluminum chloride or aluminum nitrate.
4. according to the preparation method of the described environmental composite highly effective composite flocculation agent of claim 1, it is characterized in that: the aluminium in the described inorganic aluminate and the mass ratio of water are 1:10-800.
5. according to the preparation method of the described environmental composite highly effective composite flocculation agent of claim 1, it is characterized in that: the aluminium in the described polyaluminium salts and the mass ratio of Xylo-Mucine are 1:1-35.
6. according to the preparation method of the described environmental composite highly effective composite flocculation agent of claim 1, it is characterized in that: described faint yellow emulsus composite flocculation agent carries out making solid after the drying.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633340A (en) * | 2012-04-23 | 2012-08-15 | 北京化工大学 | Green environment-friendly flocculant and method for preparing same |
| CN105461081A (en) * | 2015-12-09 | 2016-04-06 | 天津大港油田滨港集团博弘石油化工有限公司 | Composite flocculant for treating oilfield sewage and preparation method thereof |
| CN111498968A (en) * | 2020-05-07 | 2020-08-07 | 绵津环保科技(上海)有限公司 | Biodegradable settling agent and preparation method thereof |
| CN115410465A (en) * | 2022-11-01 | 2022-11-29 | 世纪亿康（天津）医疗科技发展有限公司 | Blood simulation liquid for simulating coagulation process |
-
2011
- 2011-08-12 CN CN 201110231449 patent/CN102285709B/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 孙玉等: "味精生产废水絮凝沉淀实验研究", 《辽宁城乡环境科技》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633340A (en) * | 2012-04-23 | 2012-08-15 | 北京化工大学 | Green environment-friendly flocculant and method for preparing same |
| CN105461081A (en) * | 2015-12-09 | 2016-04-06 | 天津大港油田滨港集团博弘石油化工有限公司 | Composite flocculant for treating oilfield sewage and preparation method thereof |
| CN111498968A (en) * | 2020-05-07 | 2020-08-07 | 绵津环保科技(上海)有限公司 | Biodegradable settling agent and preparation method thereof |
| CN115410465A (en) * | 2022-11-01 | 2022-11-29 | 世纪亿康（天津）医疗科技发展有限公司 | Blood simulation liquid for simulating coagulation process |
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| CN102285709B (en) | 2013-06-05 |
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