CN103721692A - Recycling method of waste powdered activated carbon - Google Patents
Recycling method of waste powdered activated carbon Download PDFInfo
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- CN103721692A CN103721692A CN201410029229.8A CN201410029229A CN103721692A CN 103721692 A CN103721692 A CN 103721692A CN 201410029229 A CN201410029229 A CN 201410029229A CN 103721692 A CN103721692 A CN 103721692A
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Abstract
The invention discloses a recycling method of waste powdered activated carbon. According to the technical scheme, the method comprises the following steps: soaking the waste powdered activated carbon generated during the refining of sodium glutamate with a hydrochloric acid in a pickling tank so as to remove partial ash and ferric salt impurities; and adding microorganisms for biological regeneration under the action of an electric field, thus finally preparing regenerated activated carbon. As the method is used, the purpose of treating the waste powdered activated carbon during the production of the sodium glutamate is realized; the recycling of resources is realized; the production cost is decreased. Thus, the significant economic and environment-friendly benefits are obtained.
Description
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Technical field
?the present invention relates to biological activated carbon regeneration field, a kind of regeneration method of waste-powder active carbon is specifically provided.
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background technology
Active carbon claims again activated carbon black, is black powder shape or granular amorphous carbon, and it is to make raw material by the material that is master containing charcoal, the hydrophobic adsorbent making through high temperature carbonization and activation.Active carbon contains a large amount of micropores, has huge specific area, can effectively remove pigment, stink and most organic pollutants and some inorganic matter.Active carbon is a kind of carbon material adsorbing material with highly developed pore structure and very big specific area, its main performance is that molecule is had to extremely strong adsorption capacity, active carbon is widely used in a lot of fields, as the liquid phase that can be used for food industry is decoloured, remove peculiar smell etc., can be used as the part of galvanic cell, the electrode of double layer capacitor, dual-use breathing mask, the holder of natural gas and acetylene etc., active carbon can be treated wound in medical treatment, gastrointestinal disorder, Abdominal pyemia, reduce the alcohol content in blood, reduce blood fat etc.If consequent a large amount of useless charcoal is not processed, not only can cause the waste of resource, also can cause environmental pollution.Therefore, no matter from economic benefit or from environmental angle, consider, the regeneration of carrying out active carbon is all necessary.The regeneration of active carbon, recover exactly the adsorption capacity of used active carbon, make it be able to the operation of the state that reuses, Chinese scholars has been carried out a large amount of research to the regeneration of active carbon, various regenerating active carbon technologies have been proposed, as hot method of reproduction, chemicals method of reproduction, electrochemical regeneration method, Photocatalytic Regeneration method, supercritical extract method of reproduction and bio-regeneration method etc.
At present, in the production process of sodium glutamate (monosodium glutamate), glutamic acid metacrystal neutralizer enters in bleacher, add food additives sodium carbonate to neutralize, make glutamic acid change sodium glutamate completely into, add powdered active carbon to carry out decolorization adsorption, to remove the pigment and the impurity that exist in feed liquid simultaneously.Along with the carrying out of reaction, after activated carbon surface adsorbed material fills up, will lose further adsorption capacity, therefore produce upper neutralization, the laggard row plate-frame filtering that decoloured, produce discarded Powdered Activated Carbon.If the active carbon after absorption cannot reclaim, not only cause the waste of resource, also can cause secondary pollution to environment.
By the way of having adsorbed organic Regenevating Waste Activated Carbon, be by organic matter leaching, decomposition or in-situ carburization.In numerous regeneration method of active carbon, hot regeneration technology is the most ripe, but its regenerative process duration, energy consumption is high, unstable product quality.Use the method regenerated carbon of microbial degradation, pore structure and pore-size distribution capable of reducing energy consumption, to guarantee active carbon.Microbial method has been widely used in the fields such as sewage disposal, fabrication of new materials.Along with the development of modern science and technology, microbial method is applied in various fields such as food, space flight, heavy metal-polluted soil processing.The present invention uses the method for microbial bacterial agent for advanced treating active carbon, method in conjunction with the impurity in Chemical Leaching activated carbon surface and macropore is regenerated to the useless activated carbon of sodium glutamate production process, microbial degradation and solvent reclamation are organically combined, they bring into play usefulness separately, and complement each other, improve the percent reduction of waste active carbon, guaranteed the original pore structure of active carbon and pore-size distribution.
Summary of the invention
The object of the invention is to solve the processing problem of waste-powder active carbon in sodium glutamate production, a kind of regeneration method of waste-powder active carbon is provided.Bio-regeneration, in the organic while of removing charcoal absorption, can also be removed the inorganic salts that are deposited on carbon surface, and the new micropore of charcoal is generated, and makes the activity of charcoal obtain basic recovery.It has significantly reduced to become to produce cost, and production process is easy and simple to handle, stable and reliable product quality.Meet the requirement of comprehensive utilization of resources, energy-saving and emission-reduction, brought huge economic benefit and environmental benefit.In order to realize the object of the invention, adopt following technical scheme:
A regeneration method for waste-powder active carbon, is characterized in that comprising the following steps:
(1) get sodium glutamate production process waste-powder active carbon, first in pickling tube, add a small amount of water, pour waste-powder active carbon into, after adding again water that charcoal is all soaked, add the hydrochloric acid solution of equal-volume 3.5-3.9 Baume degrees, soak, stir 2.5h, to remove part of ash and the molysite impurity in useless charcoal, cross leaching filter cake standby;
(2) filter cake and the water that step (1) are made are mixed to get mixed liquor, control filter cake: water (mass ratio) is 3-5:1, and adds mix bacterium agent, and dosage, for to add 50 grams, preparation by every cubic metre of mixed liquor, applies 35-40 mA/cm
2electric field, then add with the isopyknic nutrient solution of mixed liquor, reaction 16-24h.
Described nutrient solution prescription following (every liter): glucose: 5g; Urea: 2g; Ferric trichloride: 0.3g; Dipotassium hydrogen phosphate: 0.2g; Potassium dihydrogen phosphate 1.0g; Sodium nitrate 3g; Sodium phosphate 2g; Trace element mother liquor 0.5～5mL, surplus is water;
Every liter of ingredient of described micro-mother liquor is as follows: EDETATE SODIUM 2.5g, ZnSO
4.7H
2o 450mg, CoCl
2.6H
2o 225mg, MnCl
2600mg, CuSO
4.5H
2o 210mg, Na
2moO
4.2H
2o 120mg, NiCl
2.6H
2o 135 mg, H
3bO
315mg, surplus is water.
The active component that described mix bacterium agent is comprises the raw material of following weight portion:
5 parts, saccharomycete, 4 parts of pseudomonas aeruginosas, 3 parts of Paracoccus denitrificans, 3 parts of aspergillus nigers;
Described saccharomycete be specially cement rhodotorula (
rhodotorulamucilaginosa) CGMCC No:2257(is referring to document CN101220336A);
Described pseudomonas aeruginosa specifically can be pseudomonas aeruginosa (
pseudomonas aeruginosa) ATCC 15442(is for example referring to document Adaptation of Pseudomonas aeruginosa ATCC 15442 to didecyldimethylammonium bromide induces changes in membrane fatty acid composition and in resistance of cells; Journal of Applied Microbiology, 2001);
Described Paracoccus denitrificans is specially Paracoccus denitrificans (Paracoccus denitrificans) ATCC13543(referring to document Genes coding for respiratory complexes map on all three chromosomes of the Paracoccus denitrificans genome, Archives of Microbiology, 1998);
Described aspergillus niger is specially aspergillus niger (Aspergillus niger) CCTCC No:M206034; (CN1924000A)
By above saccharomycete, pseudomonas aeruginosa, Paracoccus denitrificans, aspergillus niger is all controlled at 2 × 10 according to cellar culture concentration
8individual/gram, the bacterium liquid of cultivating is mixed to get liquid bacterial agent according to mass ratio;
Get aforesaid liquid microbial inoculum and carrier and be uniformly mixed, preferably take diatomite (40-80 order) as carrier, according to microbial inoculum: the weight ratio that carrier is 3:1 is mixed.Dry: will mix material and be dried, baking temperature is 20-50 ℃, dry rear water content is 20-30%; Check, packing: by quality standard check, finished product is packed by weight, obtains solid fungicide.
(3) solution filter step 2 being made, gets filter cake, the sodium hydroxide solution cleaning active charcoal that is 5%～15% by mass concentration, and the active carbon after cleaning can obtain regenerated carbon after dewatering, being dried.
The beneficial effect that the present invention obtains:
1 bio-regeneration associating chemical method regenerated carbon of the present invention; owing to using Mixed Microbes degraded and chemical method to combine; the original pore structure of active carbon and pore-size distribution have been carried out to good protection; in production process, without poisonous and harmful substance discharge, be a resource-conserving, environmentally friendly complete set technology.
2 composite bacteria agent capables of the present invention are specially for waste-powder active carbon in sodium glutamate production, by the various bacterial classifications that can form dominant microflora, be mixed with high-efficiency microorganism preparation, by the microorganism of a large amount of this waste water of adaptation, and create an environment that is applicable to very much microbial reproduction, growth and discard in charcoal treatment system by a certain amount of being added to, accelerate the degraded of microbe, to improve the biological treatment efficiency of system, guarantee system stable operation.It contains the multiple microorganism that difficult degradation pollutant is had to good degradation capability, reasonable compatibility between each bacterial classification, symbiosis is coordinated, antagonism not mutually, active high, biomass is large, breeding is fast, large molecule, hard-degraded substance are had to good degradation effect, and compared with other processing methods, biochemical process has that energy consumption is low, treatment effect good, disposal cost is low and can not produce the features such as secondary pollution.
3 inventors pass through many experiments and show, the impact examination of the growth of microorganism metabolism of electric field action on waste-powder active carbon waste water in sodium glutamate production is very obvious, and suitable electric field action can be strengthened the growth metabolism ability in this waste water effectively.At low current density 1～10 mA/cm
2under effect, electric field does not affect substantially on the growth rate of such waste water; When current density is 35～40 mA/cm
2time, its growth rate obviously improves; Along with electric current, continue to be increased to 45～100 mA/cm
2, electric field starts to suppress the growth metabolism of corresponding microorganism, at electric current, is 200 mA/cm
2time, from 32h, there is negative growth in microorganism.
Under the invigoration effect of electric field, microbial degradation speed is promoted, thereby improves the not high weak point of current microorganisms reproduction active carbon efficiency; Active carbon after regeneration is because what adopt without high-temperature process or subsequent technique is the heat treatment of short period, and therefore loss is not very large, and adsorption capacity does not have larger reduction yet, can make active carbon life cycle extend many times than common adsorption cycle.
the specific embodiment:
A regeneration method for waste-powder active carbon, is characterized in that comprising the following steps:
(1) get sodium glutamate production process waste-powder active carbon, first in pickling tube, add a small amount of water, pour waste-powder active carbon into, after adding again water that waste-powder active carbon is all soaked, obtain mixture A, add and the hydrochloric acid solution of isopyknic 3.5 Baume degrees of mixture A, soak, stir 2.5h, to remove part of ash and the molysite impurity in waste-powder active carbon, cross leaching filter cake standby;
(2) filter cake and the water that step (1) are made are mixed to get mixed liquor, control filter cake: water (mass ratio) is 3:1, and adds mix bacterium agent, and dosage is for to add 50 grams of microbial inoculums by every cubic metre of mixed liquor, and apply current density is 35mA/cm simultaneously
2electric field, then add with the isopyknic nutrient solution of mixed liquor, reaction 16-24h.
Described nutrient solution prescription following (every liter): glucose: 5g; Urea: 2g; Ferric trichloride: 0.3g; Dipotassium hydrogen phosphate: 0.2g; Potassium dihydrogen phosphate 1.0g; Sodium nitrate 3g; Sodium phosphate 2g; Trace element mother liquor 0.5～5mL; Surplus is water;
Every liter of ingredient of described micro-mother liquor is as follows: EDETATE SODIUM 2.5g, ZnSO
4.7H
2o 450mg, CoCl
2.6H
2o 225mg, MnCl
2600mg, CuSO
4.5H
2o 210mg, Na
2moO
4.2H
2o 120mg, NiCl
2.6H
2o 135 mg, H
3bO
315mg, surplus is water.
The active component of described mix bacterium agent comprises the raw material of following weight portion:
5 parts, saccharomycete, 4 parts of pseudomonas aeruginosas, 3 parts of Paracoccus denitrificans, 3 parts of aspergillus nigers;
Described saccharomycete be specially cement rhodotorula (
rhodotorula mucilaginosa) CGMCC No:2257(is referring to document CN101220336A);
Described pseudomonas aeruginosa specifically can be pseudomonas aeruginosa (
pseudomonas aeruginosa) ATCC 15442(is for example referring to document Adaptation of Pseudomonas aeruginosa ATCC 15442 to didecyldimethylammonium bromide induces changes in membrane fatty acid composition and in resistance of cells; Journal of Applied Microbiology, 2001);
Described Paracoccus denitrificans is specially Paracoccus denitrificans (Paracoccus denitrificans) ATCC13543(referring to document Genes coding for respiratory complexes map on all three chromosomes of the Paracoccus denitrificans genome, Archives of Microbiology, 1998);
Described aspergillus niger is specially aspergillus niger (Aspergillus niger) CCTCC No:M206034; (CN1924000A)
By above saccharomycete, pseudomonas aeruginosa, Paracoccus denitrificans and aspergillus niger are according to cellar culture, and concentration is all controlled at 2 × 10
8individual/gram, the bacterium liquid of cultivating is mixed to get liquid bacterial agent according to mass ratio;
Get aforesaid liquid microbial inoculum and carrier and be uniformly mixed, preferably take diatomite (40-80 order) as carrier, according to microbial inoculum: the weight ratio that carrier is 3:1 is mixed.Dry: will mix material and be dried, baking temperature is 20-50 ℃, dry rear water content is 20-30%; Check, packing: by quality standard check, finished product is packed by weight, obtains solid fungicide.
(3) solution filter step (2) reaction being obtained, gets filter cake, the sodium hydroxide solution cleaning active charcoal that is 15% by mass concentration, and the active carbon after cleaning can obtain regenerated carbon after dewatering, being dried.
The final active carbon specific area obtaining of embodiment 1 is 1118.5m
2/ g, iodine sorption value is 808.1mg/g, and methylene blue adsorption value is 210.5mg/g, and regeneration rate is 90%.
Quality to active carbon before and after reclaiming is analyzed, as shown in table 1 below:
Table 1
| Project | New charcoal | Charcoal after reclaiming |
| Outward appearance | Black fine powder | Black fine powder |
| Differentiate | Be positive reaction | Be positive reaction |
| Decolorizing ability (0.1g de-0.15% is without the blue liquid of waterside first) ml ,≤ | 10.0 | 10.0 |
| Molysite (%)≤ | 0．10 | 0.10 |
| Heavy metal (%)≤ | 0.003 | 0．003 |
| Water-soluble residue | 0.32 | 0.39 |
| Sulfide | Reactionless | Reactionless |
Hulunbuir Northeast Fufeng Biotechnology Co., Ltd. produces 200000 tons of sodium glutamates per year, and technique produces 5000 tons of waste-powder active carbons.Adopt after regenerating active carbon of the present invention, after the treated regeneration of waste-powder active carbon producing in production process, be back to sodium glutamate production cycle utilization, annual cost-saving nearly 4,000 ten thousand yuan, and avoided the secondary pollution of waste-powder active carbon, brought significant economy, society and environmental benefit.
What more than enumerate is only best specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, can also have many distortion.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (3)
1. a regeneration method for waste-powder active carbon, is characterized in that comprising the following steps:
(1) get waste-powder active carbon, first in pickling tube, add a small amount of water, pour waste-powder active carbon into, add again water to make all wetting mixture A that obtains of waste-powder active carbon, add the hydrochloric acid solution with the isopyknic 3.5-3.9 Baume degrees of mixture A, soak, stir 2.5h, cross leaching filter cake standby;
(2) filter cake and the water that step (1) are made are mixed to get mixed liquor according to mass ratio 3-5:1, add mix bacterium agent, and dosage, for to add 50 grams, preparation by every cubic metre of mixed liquor, applies 35-40mA/cm
2electric field, then add with the isopyknic nutrient solution of mixed liquor, reaction 16-24h;
Described nutrient solution prescription is every liter: glucose: 5g; Urea: 2g; Ferric trichloride: 0.3g; Dipotassium hydrogen phosphate: 0.2g; Potassium dihydrogen phosphate 1.0g; Sodium nitrate 3g; Sodium phosphate 2g; Trace element mother liquor 0.5～5mL; Surplus is water;
The active component of described mix bacterium agent comprises the raw material of following weight portion:
5 parts, saccharomycete, 4 parts of pseudomonas aeruginosas, 3 parts of Paracoccus denitrificans, 3 parts of aspergillus nigers;
(3) solution filter step (2) reaction being obtained, gets filter cake, and with 5%～15% sodium hydroxide solution cleaning active charcoal, the active carbon after cleaning can obtain regenerated carbon after dewatering, being dried.
2. method according to claim 1, is characterized in that, every liter of ingredient of described micro-mother liquor is as follows: EDETATE SODIUM 2.5g, ZnSO
4.7H
2o 450mg, CoCl
2.6H
2o 225mg, MnCl
2600mg, CuSO
4.5H
2o 210mg, Na
2moO
4.2H
2o 120mg, NiCl
2.6H
2o 135 mg, H
3bO
315mg, surplus is water.
3. according to the method described in claim 1-2, it is characterized in that,
Described saccharomycete be cement rhodotorula (
rhodotorula mucilaginosa) CGMCC No:2257;
Described pseudomonas aeruginosa be preferably pseudomonas aeruginosa (
pseudomonas aeruginosa) ATCC 15442;
Described Paracoccus denitrificans is preferably Paracoccus denitrificans (Paracoccus denitrificans) ATCC13543;
Described aspergillus niger is preferably aspergillus niger (Aspergillus niger) CCTCC No:M206034;
By above saccharomycete, pseudomonas aeruginosa, the concentration of Paracoccus denitrificans and aspergillus niger is all controlled at about 2 × 10
8individual/gram, then according to mass ratio, be mixed to get liquid bacterial agent; Get liquid bacterial agent and diatomite is uniformly mixed, according to liquid bacterial agent: the weight ratio that carrier is 3:1 is mixed, the dry mix bacterium agent of preparing.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911133A (en) * | 2015-06-25 | 2015-09-16 | 华南理工大学 | Pseudomonas aeruginosa and application |
| CN104941580A (en) * | 2015-06-03 | 2015-09-30 | 河南新大新材料股份有限公司 | Method for recycling and treating active carbon used for decolouring silicon wafer cutting fluid |
| CN105503481A (en) * | 2016-01-23 | 2016-04-20 | 黑龙江省农业科学院植物脱毒苗木研究所 | Manufacturing method of probiotic carbon powder for diced potato seed coating |
| CN105598158A (en) * | 2016-01-28 | 2016-05-25 | 中南大学 | Phosphorus-based biochar material, and preparation and application thereof |
| CN107986276A (en) * | 2017-12-21 | 2018-05-04 | 齐齐哈尔龙江阜丰生物科技有限公司 | A kind of crystal sugar decoloration active carbon regeneration technology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104941580A (en) * | 2015-06-03 | 2015-09-30 | 河南新大新材料股份有限公司 | Method for recycling and treating active carbon used for decolouring silicon wafer cutting fluid |
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| CN104911133B (en) * | 2015-06-25 | 2018-06-19 | 华南理工大学 | A kind of pseudomonas aeruginosa and application |
| CN105503481A (en) * | 2016-01-23 | 2016-04-20 | 黑龙江省农业科学院植物脱毒苗木研究所 | Manufacturing method of probiotic carbon powder for diced potato seed coating |
| CN105598158A (en) * | 2016-01-28 | 2016-05-25 | 中南大学 | Phosphorus-based biochar material, and preparation and application thereof |
| CN107986276A (en) * | 2017-12-21 | 2018-05-04 | 齐齐哈尔龙江阜丰生物科技有限公司 | A kind of crystal sugar decoloration active carbon regeneration technology |
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