CN105217719B - The processing method of heavy metal chromium in a kind of leather-making waste water - Google Patents
The processing method of heavy metal chromium in a kind of leather-making waste water Download PDFInfo
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- CN105217719B CN105217719B CN201510791744.4A CN201510791744A CN105217719B CN 105217719 B CN105217719 B CN 105217719B CN 201510791744 A CN201510791744 A CN 201510791744A CN 105217719 B CN105217719 B CN 105217719B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 43
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000011651 chromium Substances 0.000 title claims abstract description 36
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 35
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 6
- 238000003672 processing method Methods 0.000 title claims abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 238000000855 fermentation Methods 0.000 claims abstract description 32
- 230000004151 fermentation Effects 0.000 claims abstract description 32
- 239000000419 plant extract Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 239000000706 filtrate Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 241000196324 Embryophyta Species 0.000 claims description 8
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical class CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 6
- 241000219000 Populus Species 0.000 claims description 6
- 241000758797 Pterocarya Species 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000003760 magnetic stirring Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000011780 sodium chloride Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- 241001312214 Epipremnum aureum Species 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 4
- 238000007605 air drying Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 3
- 125000004494 ethyl ester group Chemical group 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 239000013043 chemical agent Substances 0.000 abstract description 3
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000010985 leather Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- PMJHHCWVYXUKFD-SNAWJCMRSA-N (E)-1,3-pentadiene Chemical compound C\C=C\C=C PMJHHCWVYXUKFD-SNAWJCMRSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- ODIGIKRIUKFKHP-UHFFFAOYSA-N (n-propan-2-yloxycarbonylanilino) acetate Chemical compound CC(C)OC(=O)N(OC(C)=O)C1=CC=CC=C1 ODIGIKRIUKFKHP-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910001430 chromium ion Inorganic materials 0.000 description 1
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 1
- QFSKIUZTIHBWFR-UHFFFAOYSA-N chromium;hydrate Chemical compound O.[Cr] QFSKIUZTIHBWFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of processing method of heavy metal chromium in leather-making waste water, belong to technical field of waste water processing.Mixed plant extract solution and treated pigskin that the present invention will mainly be prepared, again mixed fermentation is carried out with some organic matters, and extracted using ethyl acetate, and it is condensed into chromium treatment fluid, then mixed in certain proportion with chromate waste water and be aerated, so that one layer of oil stain of wastewater surface floatability and adsorbing chromium, oil stain is finally wiped off.Beneficial effects of the present invention：0.4~0.5mg/L is down to from 60~1500mg/L through contained chromium content in the waste water after treatment, clearance reaches more than 99%, while without using chemical agent, secondary pollution will not be caused to environment.
Description
Technical field
The present invention relates to a kind of processing method of heavy metal chromium in leather-making waste water, belong to technical field of waste water processing.
Background technology
Leather industry is only second to one of the highly water intensive of paper-making industry, heavy polluted industry in having turned into light industry.With ox-hide process hides
As a example by, often processing an ox-hide leather needs 0.8~1.0t of water consumption, the annual waste water to environmental emission of current China's leather industry
It is 8000~120,000,000 tons to measure, and accounts for the 0.3% of national industrial wastewater total release.Leather-making technology mainly have degreasing, deliming,
Ease back, chrome tanning, retanning, neutralization, the operation such as dye fixing and washing, wherein chrome tanning, retanning procedures usually using substantial amounts of containing chromium
Tanning agent (such as chromium powder), neutralization step is produced highly concentrated respectively usually using the substantial amounts of industrial chemicals (such as ammonium hydrogencarbonate) containing ammonia nitrogen
Degree chromate waste water and ammonia nitrogen waste water, Cr in waste water3+Content is generally 60~1500mg/L, if be not subject to treatment for reuse can cause
Serious pollution and waste, leather-making waste water carries out circulation and recycling has great importance.
Quick lime is added in leather-making waste water containing sulfide, chloride and metal chromium ions, is formed it into and is contained vulcanization
Calcium, calcium chloride and chromium hydroxide and calcium hydroxide mixture precipitation ground lime emulsion.The efficient recycling of leather producing chrome tanning exhausted liquid is led to
Outside the solid content crossed during filter method removes chroming waste liquor, chrome tanning tan type is influenceed in also removing chroming waste liquor using method for oxidation
With color and the complex bound acylate of chromic salts and polypeptide.In a word, the above method is not the presence of complex operation, operation
The problems such as high cost, not mature enough technique, exactly there is the defects such as secondary pollution or water treatment effect be not good, and substantially
Water circulation is not carried out, the requirement of clean manufacturing is not met.
The content of the invention
Present invention mainly solves technical problem：For addition quick lime in treatment leather-making waste water at present or with oxidation
Method removes the chromium content of waste water, but it is not good to there is treatment effect, it is impossible to Water circulation is carried out, while complex operation, operating cost
A kind of the drawbacks of high the problems such as, there is provided the processing method of heavy metal chromium in leather-making waste water, the method is mainly mixed by what is prepared
Plant extraction liquid and treated pigskin are closed, then mixed fermentation is carried out with some organic matters, and extracted using ethyl acetate, and it is dense
Shorten chromium treatment fluid into, then mixed in certain proportion with chromate waste water and be aerated so that one layer of wastewater surface floatability
Oil stain simultaneously adsorbs chromium, finally wipes oil stain off.The present invention is through contained chromium content in the waste water after treatment from 60~1500mg/
L is down to 0.4~0.5mg/L, and clearance reaches more than 99%, while without using chemical agent, will not cause secondary to environment
Pollution.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention：
(1) count by weight, win 40~60 parts of fresh Poplar leaves, 20~30 parts of Folium Pterocaryaes, 20~30 parts of epipremnum aureums,
After above-mentioned leaves of plants clear water is rinsed well, 30~40min of immersion in the sodium chloride solution that mass fraction is 9~10% is placed in
Afterwards, take out, make its natural air drying, be placed in being milled into 50~60 mesh powder in grinding mill；
(2) by solid-liquid mass ratio 1:2, after the ethanol that above-mentioned powder and mass fraction are 65% is mixed, being placed in rotating speed is
In the magnetic stirring apparatus of 150~200r/min stir 20~30min, it is to be mixed after the completion of, extract 5~6h, collect filtrate, repeat
After extraction 3~4 times, merging filtrate is that can obtain mixed plant extract solution, standby；
(3) fresh 1~2kg of pigskin is taken, is placed in pulverizer after being ground into the pigskin powder of 70~80 mesh, be placed in
In above-mentioned mixed plant extract solution, wherein pigskin powder and the mass ratio of mixed plant extract solution is 1:1, it is uniformly mixed
Afterwards, 15~20min is stood；
(4) count by weight, by 40~50 parts of cyclopentadiene, 35~40 parts of pentanes and 15~20 parts of polyacrylamides are stirred
Mix after being well mixed, by solid-liquid mass ratio 1:5, add into the above-mentioned turbid liquid of mixing, after being uniformly mixed, move to fermentation tank
In, sealing and fermenting is carried out to it, fermentation temperature is controlled for 30~35 DEG C, until the zymotic fluid in fermentation tank is in pulpous state；
(5) treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank is filtered, obtain filtered fluid, then by ethyl acetate
With filtered fluid by volume 1:After 2 are mixed, pour into separatory funnel, after standing until two-phase is substantially layered, take upper strata
Ethyl acetate phase solution；
(6) above-mentioned ethyl acetate phase solution is placed in beaker, heating schedule liter is carried out with the speed of 2 DEG C/min to it
Temperature, after waiting to be warming up to 80~85 DEG C, and 30~40min of insulation, stops heating, it is naturally cooled to room temperature, it is carried out dense
Be reduced to original volume 1/2 can obtain chromium treatment fluid；
(7) chromium treatment fluid obtained above is added into leather-making waste water, 40~50mL is added in every liter of leather-making waste water
Chromium treatment fluid, after being uniformly mixed, it is aerated, aeration 2~3 times after, stand 1~2h, the meeting of leather-making waste water surface
One layer of oil stain of floating, is wiped off, you can.
The beneficial effects of the invention are as follows：
(1) 0.4~0.5mg/L is down to from 60~1500mg/L through contained chromium content in the waste water after treatment, clearance reaches
To more than 99%；
(2) without using chemical agent, secondary pollution will not be caused to environment；
(3) operating procedure is simple, required low cost.
Specific embodiment
Count by weight first, win 40~60 parts of fresh Poplar leaves, 20~30 parts of Folium Pterocaryaes, 20~30 parts are green
Trailing plants, after above-mentioned leaves of plants clear water is rinsed well, be placed in the sodium chloride solution that mass fraction is 9~10% immersion 30~
After 40min, take out, make its natural air drying, be placed in being milled into 50~60 mesh powder in grinding mill；By solid-liquid mass ratio 1:2, will
After above-mentioned powder mixes with the ethanol that mass fraction is 65%, it is placed in the magnetic stirring apparatus that rotating speed is 150~200r/min and stirs
Mix 20~30min, it is to be mixed after the completion of, extract 5~6h, collect filtrate, after repeating extraction 3~4 times, merging filtrate is that can obtain
Mixed plant extract solution, it is standby.
Fresh 1~2kg of pigskin is taken, is placed in pulverizer after being ground into the pigskin powder of 180~260 mesh, be placed in
In above-mentioned mixed plant extract solution, wherein pigskin powder and the mass ratio of mixed plant extract solution is 1:1, it is uniformly mixed
Afterwards, 15~20min is stood；Count by weight again, by 40~50 parts of cyclopentadiene, 35~40 parts of pentanes and 15~20 parts poly- third
After dilute acid amides is uniformly mixed, by solid-liquid mass ratio 1:5, add into the above-mentioned turbid liquid of mixing, after being uniformly mixed, move
Into fermentation tank, sealing and fermenting is carried out to it, control fermentation temperature for 30~35 DEG C, until the zymotic fluid in fermentation tank is in slurry
Shape；Treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank is filtered, obtain filtered fluid, then by ethyl acetate and filtered fluid
By volume 1:After 2 are mixed, pour into separatory funnel, after standing until two-phase is substantially layered, take the ethyl acetate on upper strata
Phase solution；Above-mentioned ethyl acetate phase solution is placed in beaker, heating schedule intensification is carried out with the speed of 2 DEG C/min to it,
After waiting to be warming up to 80~85 DEG C, and 30~40min of insulation, stop heating, it is naturally cooled to room temperature, it is concentrated into
The 1/2 of original volume can obtain chromium treatment fluid；Finally chromium treatment fluid obtained above is added into leather-making waste water, every liter
The chromium treatment fluid of 4~5mL is added in leather-making waste water, after being uniformly mixed, it is aerated, after being aerated 2~3 times, stand 1
~2h, leather-making waste water surface can float one layer of oil stain, be wiped off, you can.
Example 1
Count by weight first, win 60 parts of fresh Poplar leaves, 20 parts of Folium Pterocaryaes, 20 parts of epipremnum aureums, by above-mentioned plant
After leaf clear water is rinsed well, it is placed in after soaking 40min in the sodium chloride solution that mass fraction is 10%, takes out, makes its nature
Air-dry, be placed in being milled into 180 mesh powder in grinding mill；By solid-liquid mass ratio 1:2, it is 65% by above-mentioned powder and mass fraction
Ethanol mixing after, be placed in the magnetic stirring apparatus that rotating speed is 200r/min and stir 30min, it is to be mixed after the completion of, extract 6h, receive
Collection filtrate, after repeating to extract 4 times, merging filtrate is that can obtain mixed plant extract solution, standby；Fresh pigskin 2kg is taken, by it
After being placed in pulverizer the pigskin powder for being ground into 80 mesh, be placed in above-mentioned mixed plant extract solution, wherein pigskin powder with
The mass ratio of mixed plant extract solution is 1:1, after being uniformly mixed, stand 20min；Count by weight again, by 50 parts of rings
After pentadiene, 35 parts of pentanes and 15 parts of polyacrylamides are uniformly mixed, by solid-liquid mass ratio 1:5, add to above-mentioned and mix
Close in turbid liquid, after being uniformly mixed, move in fermentation tank, sealing and fermenting is carried out to it, control fermentation temperature for 35 DEG C, until
Zymotic fluid in fermentation tank is in pulpous state；Treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank filtered, obtain filtered fluid,
Again by ethyl acetate and filtered fluid by volume 1:After 2 are mixed, pour into separatory funnel, stand until two-phase is substantially layered
Afterwards, the ethyl acetate phase solution on upper strata is taken；Above-mentioned ethyl acetate phase solution is placed in beaker, to it with the speed of 2 DEG C/min
Rate carries out heating schedule intensification, waits to be warming up to 85 DEG C, and after being incubated 40min, stops heating, it is naturally cooled to room temperature, right
What it be concentrated into original volume 1/2 can obtain chromium treatment fluid；Finally chromium treatment fluid obtained above is added to process hides
In waste water, the chromium treatment fluid of 5mL is added in every liter of leather-making waste water, after being uniformly mixed, it is aerated, be aerated 3 times
Afterwards, 2h is stood, leather-making waste water surface can float one layer of oil stain, be wiped off, you can.The present invention is through contained in the waste water after treatment
Chromium content is down to 0.5mg/L from 1500mg/L, and clearance reaches 99.99%.
Example 2
Count by weight first, win 40 parts of fresh Poplar leaves, 30 parts of Folium Pterocaryaes, 30 parts of epipremnum aureums, by above-mentioned plant
After leaf clear water is rinsed well, it is placed in after soaking 40min in the sodium chloride solution that mass fraction is 10%, takes out, makes its nature
Air-dry, be placed in being milled into 260 mesh powder in grinding mill；By solid-liquid mass ratio 1:2, it is 65% by above-mentioned powder and mass fraction
Ethanol mixing after, be placed in the magnetic stirring apparatus that rotating speed is 200r/min and stir 30min, it is to be mixed after the completion of, extract 6h, receive
Collection filtrate, after repeating to extract 4 times, merging filtrate is that can obtain mixed plant extract solution, standby；Fresh pigskin 1kg is taken, by it
After being placed in pulverizer the pigskin powder for being ground into 70 mesh, be placed in above-mentioned mixed plant extract solution, wherein pigskin powder with
The mass ratio of mixed plant extract solution is 1:1, after being uniformly mixed, stand 15min；Count by weight again, by 40 parts of rings
Pentadiene, 40 parts of pentanes and, after 20 parts of polyacrylamides are uniformly mixed, by solid-liquid mass ratio 1:5, add to above-mentioned and mix
Close in turbid liquid, after being uniformly mixed, move in fermentation tank, sealing and fermenting is carried out to it, control fermentation temperature for 30 DEG C, until
Zymotic fluid in fermentation tank is in pulpous state；Treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank filtered, obtain filtered fluid,
Again by ethyl acetate and filtered fluid by volume 1:After 2 are mixed, pour into separatory funnel, stand until two-phase is substantially layered
Afterwards, the ethyl acetate phase solution on upper strata is taken；Above-mentioned ethyl acetate phase solution is placed in beaker, to it with the speed of 2 DEG C/min
Rate carries out heating schedule intensification, waits to be warming up to 80 DEG C, and after being incubated 35min, stops heating, it is naturally cooled to room temperature, right
What it be concentrated into original volume 1/2 can obtain chromium treatment fluid；Finally chromium treatment fluid obtained above is added to process hides
In waste water, the chromium treatment fluid of 5mL is added in every liter of leather-making waste water, after being uniformly mixed, it is aerated, be aerated 2 times
Afterwards, 1h is stood, leather-making waste water surface can float one layer of oil stain, be wiped off, you can.The present invention is through contained in the waste water after treatment
Chromium content is down to 0.4mg/L from 60mg/L, and clearance reaches 99.3%.
Example 3
Count by weight first, win 45 parts of fresh Poplar leaves, 25 parts of Folium Pterocaryaes, 30 parts of epipremnum aureums, by above-mentioned plant
After leaf clear water is rinsed well, it is placed in after soaking 35min in the sodium chloride solution that mass fraction is 8%, takes out, makes its natural wind
It is dry, it is placed in being milled into 200 mesh powder in grinding mill；By solid-liquid mass ratio 1:2, it is 65% by above-mentioned powder and mass fraction
Ethanol mixing after, be placed in and 25min stirred in the magnetic stirring apparatus that rotating speed is 150~200r/min, it is to be mixed after the completion of, extraction
5h, collects filtrate, and after repeating to extract 3 times, merging filtrate is that can obtain mixed plant extract solution, standby；Take fresh pigskin
1kg, is placed in pulverizer after being ground into the pigskin powder of 75 mesh, is placed in above-mentioned mixed plant extract solution, wherein pig
Skin powder is 1 with the mass ratio of mixed plant extract solution:1, after being uniformly mixed, stand 17min；Count by weight again,
By 45 parts of cyclopentadiene, after 35 parts of pentanes and 20 parts of polyacrylamides are uniformly mixed, by solid-liquid mass ratio 1:5, add extremely
In the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentation tank, sealing and fermenting is carried out to it, control the fermentation temperature to be
32 DEG C, until the zymotic fluid in fermentation tank is in pulpous state；Treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank filtered,
Filtered fluid, then by ethyl acetate and filtered fluid by volume 1:After 2 are mixed, pour into separatory funnel, stand until two
Mutually substantially take the ethyl acetate phase solution on upper strata after layering；Above-mentioned ethyl acetate phase solution is placed in beaker, to it with 2
DEG C/speed of min carries out heating schedule intensification, waits to be warming up to 82 DEG C, and after being incubated 35min, stop heating, make its natural cooling
To room temperature, to it be concentrated into the 1/2 of original volume and can obtain chromium treatment fluid；Finally chromium treatment fluid obtained above is added
Enter into leather-making waste water, the chromium treatment fluid of 5mL added in every liter of leather-making waste water, after being uniformly mixed, it is aerated,
After aeration 2 times, 1h is stood, leather-making waste water surface can float one layer of oil stain, be wiped off, you can.The present invention is through useless after treatment
Contained chromium content is down to 0.4mg/L from 65mg/L in water, and clearance reaches 99.4%.
Claims (1)
1. in a kind of leather-making waste water heavy metal chromium processing method, it is characterised in that specific preparation process is：
(1) count by weight, win 40~60 parts of fresh Poplar leaves, 20~30 parts of Folium Pterocaryaes, 20~30 parts of epipremnum aureums will be upper
State after leaves of plants clear water rinses well, be placed in after soaking 30~40min in the sodium chloride solution that mass fraction is 9~10%,
Take out, make its natural air drying, be placed in being milled into 50~60 mesh powder in grinding mill；
(2) by solid-liquid mass ratio 1:2, after the ethanol that above-mentioned powder and mass fraction are 65% is mixed, be placed in rotating speed for 150~
In the magnetic stirring apparatus of 200r/min stir 20~30min, it is to be mixed after the completion of, extract 5~6h, collect filtrate, repeat extraction 3
After~4 times, merging filtrate is that can obtain mixed plant extract solution, standby；
(3) fresh 1~2kg of pigskin is taken, is placed in pulverizer after being ground into the pigskin powder of 180~260 mesh, be placed in
In the mixed plant extract solution stated, wherein pigskin powder and the mass ratio of mixed plant extract solution is 1:1, it is uniformly mixed
Afterwards, 15~20min is stood；
(4) count by weight, by 40~50 parts of cyclopentadiene, 35~40 parts of pentanes and 15~20 parts of polyacrylamide stirrings are mixed
After closing uniformly, by solid-liquid mass ratio 1:5, add in the above-mentioned turbid liquid of mixing, after being uniformly mixed, in moving to fermentation tank,
Sealing and fermenting is carried out to it, fermentation temperature is controlled for 30~35 DEG C, until the zymotic fluid in fermentation tank is in pulpous state；
(5) treat after the completion of above-mentioned fermentation, the fermentate in fermentation tank is filtered, obtain filtered fluid, then by ethyl acetate and mistake
Filtrate by volume 1:After 2 are mixed, pour into separatory funnel, after standing until two-phase is substantially layered, take the acetic acid on upper strata
Ethyl ester phase solution；
(6) above-mentioned ethyl acetate phase solution is placed in beaker, heating schedule intensification is carried out with the speed of 2 DEG C/min to it,
After waiting to be warming up to 80~85 DEG C, and 30~40min of insulation, stop heating, it is naturally cooled to room temperature, it is concentrated into
The 1/2 of original volume can obtain chromium treatment fluid；
(7) chromium treatment fluid obtained above is added into leather-making waste water, is added in every liter of leather-making waste water at the chromium of 4~5mL
Reason liquid, after being uniformly mixed, is aerated to it, after being aerated 2~3 times, stands 1~2h, and leather-making waste water surface can float one
Layer oil stain, is wiped off, you can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791744.4A CN105217719B (en) | 2015-11-17 | 2015-11-17 | The processing method of heavy metal chromium in a kind of leather-making waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791744.4A CN105217719B (en) | 2015-11-17 | 2015-11-17 | The processing method of heavy metal chromium in a kind of leather-making waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105217719A CN105217719A (en) | 2016-01-06 |
| CN105217719B true CN105217719B (en) | 2017-06-20 |
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