CN105217719A - The treatment process of heavy metal chromium in a kind of leather-making waste water - Google Patents
The treatment process of heavy metal chromium in a kind of leather-making waste water Download PDFInfo
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- CN105217719A CN105217719A CN201510791744.4A CN201510791744A CN105217719A CN 105217719 A CN105217719 A CN 105217719A CN 201510791744 A CN201510791744 A CN 201510791744A CN 105217719 A CN105217719 A CN 105217719A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 44
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000011651 chromium Substances 0.000 title claims abstract description 36
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 36
- 238000011282 treatment Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910001385 heavy metal Inorganic materials 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 60
- 238000005273 aeration Methods 0.000 claims abstract description 14
- 238000000855 fermentation Methods 0.000 claims abstract description 8
- 230000004151 fermentation Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 37
- 239000000843 powder Substances 0.000 claims description 24
- 241000196324 Embryophyta Species 0.000 claims description 19
- 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
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000003801 milling Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- -1 polypropylene Polymers 0.000 claims description 7
- 241001312214 Epipremnum aureum Species 0.000 claims description 6
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical class CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 241000758797 Pterocarya Species 0.000 claims description 6
- 238000007605 air drying Methods 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- 238000003760 magnetic stirring Methods 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 239000000047 product Substances 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
- 238000007654 immersion Methods 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000010985 leather Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 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
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 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
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 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
- JNVCSEDACVAATK-UHFFFAOYSA-L [Ca+2].[S-]SSS[S-] Chemical compound [Ca+2].[S-]SSS[S-] JNVCSEDACVAATK-UHFFFAOYSA-L 0.000 description 1
- 238000011276 addition treatment Methods 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 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
- 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
- 239000003317 industrial substance 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
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction 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
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940051851 sulfurated lime Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention relates to the treatment process of heavy metal chromium in a kind of leather-making waste water, belong to technical field of waste water processing.The present invention is mainly by the mixed plant extracting solution of preparation and the pigskin processed, mixed fermentation is carried out again with some organism, and utilize ethyl acetate to extract, and be condensed into chromium treatment solution, then carry out in certain proportion mixing with chromate waste water and aeration, make wastewater surface floatability one deck oil stain and chromium is adsorbed, finally wiping oil stain off.Beneficial effect of the present invention: in waste water after treatment, contained chromium content is down to 0.4 ~ 0.5mg/L from 60 ~ 1500mg/L, and clearance reaches more than 99%, simultaneously without using chemical agent, can not cause secondary pollution to environment.
Description
Technical field
The present invention relates to the treatment process of heavy metal chromium in a kind of leather-making waste water, belong to technical field of waste water processing.
Background technology
Leather industry has become in light industry one of the high water consumption, heavy polluted industry that are only second to paper-making industry.For ox-hide process hides, every processing ox-hide leather needs water consumption 0.8 ~ 1.0t, and current China leather industry is 8000 ~ 12,000 ten thousand tons to the wastewater flow rate of environmental emission every year, accounts for 0.3% of national trade effluent total release.Leather-making technology mainly contains degreasing, deliming, eases back, chrome tanning, retanning, neutralization, the operation such as dye fixing and washing, wherein chrome tanning, retanning procedures use a large amount of containing chrome tanning agent (as chromium powder) usually, in and operation usually use a large amount of industrial chemicals (as ammonium hydrogencarbonate) containing ammonia nitrogen, produce high-concentration chromium-containing wastewater and ammonia nitrogen waste water respectively, in waste water, Cr3+ content is generally 60 ~ 1500mg/L, if in addition treatment for reuse can not cause serious pollution and waste, leather-making waste water carries out circulation and recycling has great importance.
Add unslaked lime in leather-making waste water containing sulfide, muriate and metal chromium ions, make it be formed containing sulfurated lime, calcium chloride and chromium hydroxide and calcium hydroxide mixture precipitation ground lime emulsion.The efficient recycling of leather producing chrome tanning exhausted liquid by outside the solid substance in filter method removing chroming waste liquor, also use in method for oxidation removing chroming waste liquor affect chrome tanning tan type and color, with the complex bound organic acid salt of chromic salts and protein polypeptide.In a word, aforesaid method is not there is the problems such as complicated operation, running cost is high, technique is not mature enough, there is secondary pollution exactly or the defect such as water treatment effect is not good, and does not substantially carry out Water circulation, do not meet the requirement of cleaner production.
Summary of the invention
The technical problem that the present invention mainly solves: for processing in leather-making waste water the chromium content adding unslaked lime or remove waste water with the method for oxidation at present, but it is not good to there is treatment effect, Water circulation can not be carried out, complicated operation simultaneously, the drawback of the problems such as running cost is high, provide the treatment process of heavy metal chromium in a kind of leather-making waste water, the method is mainly by the mixed plant extracting solution of preparation and the pigskin processed, mixed fermentation is carried out again with some organism, and utilize ethyl acetate to extract, and be condensed into chromium treatment solution, then carry out in certain proportion mixing with chromate waste water and aeration, make wastewater surface floatability one deck oil stain and chromium is adsorbed, finally wipe oil stain off.In the present invention's waste water after treatment, contained chromium content is down to 0.4 ~ 0.5mg/L from 60 ~ 1500mg/L, and clearance reaches more than 99%, simultaneously without using chemical agent, can not cause secondary pollution to environment.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention:
(1) count by weight, win 40 ~ 60 parts of fresh Folium Populi Pseudo-simonii, 20 ~ 30 parts of Folium Pterocaryaes, 20 ~ 30 parts of epipremnum aureums, after being rinsed well by above-mentioned leaf clear water, being placed in massfraction is after the sodium chloride solution immersion 30 ~ 40min of 9 ~ 10%, takes out, make its natural air drying, and be placed in runner milling and be milled into 50 ~ 60 order powder;
(2) by solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, be placed in magnetic stirring apparatus stirring 20 ~ 30min that rotating speed is 150 ~ 200r/min, to be mixed complete after, lixiviate 5 ~ 6h, collects filtrate, after repeating lixiviate 3 ~ 4 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use;
(3) fresh pigskin 1 ~ 2kg is got, be placed in pulverizer after being ground into 70 ~ 80 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leave standstill 15 ~ 20min;
(4) count by weight, by 40 ~ 50 parts of cyclopentadiene, after 35 ~ 40 parts of pentanes and 15 ~ 20 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, carry out sealing and fermenting to it, controlling leavening temperature is 30 ~ 35 DEG C, until the fermented liquid in fermentor tank is pulpous state;
(5) after above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, after by ethyl acetate, 1:2 mixes by volume with filtered liquid again, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata;
(6) above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 80 ~ 85 DEG C, and after being incubated 30 ~ 40min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution;
(7) above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 40 ~ 50mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 2 ~ 3 times, leaves standstill 1 ~ 2h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.
The invention has the beneficial effects as follows:
(1) in waste water after treatment, contained chromium content is down to 0.4 ~ 0.5mg/L from 60 ~ 1500mg/L, and clearance reaches more than 99%;
(2) without using chemical agent, secondary pollution can not be caused to environment;
(3) operation steps is simple, and required cost is low.
Embodiment
First count by weight, win 40 ~ 60 parts of fresh Folium Populi Pseudo-simonii, 20 ~ 30 parts of Folium Pterocaryaes, 20 ~ 30 parts of epipremnum aureums, after being rinsed well by above-mentioned leaf clear water, being placed in massfraction is after the sodium chloride solution immersion 30 ~ 40min of 9 ~ 10%, takes out, make its natural air drying, and be placed in runner milling and be milled into 50 ~ 60 order powder; By solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, be placed in magnetic stirring apparatus stirring 20 ~ 30min that rotating speed is 150 ~ 200r/min, to be mixed complete after, lixiviate 5 ~ 6h, collects filtrate, after repeating lixiviate 3 ~ 4 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use;
Get fresh pigskin 1 ~ 2kg, be placed in pulverizer after being ground into 180 ~ 260 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leave standstill 15 ~ 20min; Count by weight again, by 40 ~ 50 parts of cyclopentadiene, after 35 ~ 40 parts of pentanes and 15 ~ 20 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, carry out sealing and fermenting to it, controlling leavening temperature is 30 ~ 35 DEG C, until the fermented liquid in fermentor tank is pulpous state; After above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, then after 1:2 mixes by volume with filtered liquid by ethyl acetate, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata; Above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 80 ~ 85 DEG C, and after being incubated 30 ~ 40min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution; Finally above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 4 ~ 5mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 2 ~ 3 times, leaves standstill 1 ~ 2h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.
Example 1
First count by weight, win 60 parts of fresh Folium Populi Pseudo-simonii, 20 parts of Folium Pterocaryaes, 20 parts of epipremnum aureums, after above-mentioned leaf clear water is rinsed well, be placed in massfraction be 10% sodium chloride solution soak 40min after, take out, make its natural air drying, and be placed in runner milling and be milled into 180 order powder; By solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, being placed in rotating speed is that the magnetic stirring apparatus of 200r/min stirs 30min, to be mixed complete after, lixiviate 6h, collect filtrate, after repetition lixiviate 4 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use; Get fresh pigskin 2kg, be placed in pulverizer after being ground into 80 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leaves standstill 20min; Count by weight again, by 50 parts of cyclopentadiene, after 35 parts of pentanes and 15 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, carry out sealing and fermenting to it, controlling leavening temperature is 35 DEG C, until the fermented liquid in fermentor tank is pulpous state; After above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, then after 1:2 mixes by volume with filtered liquid by ethyl acetate, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata; Above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 85 DEG C, and after being incubated 40min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution; Finally above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 5mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 3 times, leaves standstill 2h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.In the present invention's waste water after treatment, contained chromium content is down to 0.5mg/L from 1500mg/L, and clearance reaches 99.99%.
Example 2
First count by weight, win 40 parts of fresh Folium Populi Pseudo-simonii, 30 parts of Folium Pterocaryaes, 30 parts of epipremnum aureums, after above-mentioned leaf clear water is rinsed well, be placed in massfraction be 10% sodium chloride solution soak 40min after, take out, make its natural air drying, and be placed in runner milling and be milled into 260 order powder; By solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, being placed in rotating speed is that the magnetic stirring apparatus of 200r/min stirs 30min, to be mixed complete after, lixiviate 6h, collect filtrate, after repetition lixiviate 4 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use; Get fresh pigskin 1kg, be placed in pulverizer after being ground into 70 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leaves standstill 15min; Count by weight again, by 40 parts of cyclopentadiene, 40 parts of pentanes and, after 20 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, sealing and fermenting is carried out to it, controlling leavening temperature is 30 DEG C, until the fermented liquid in fermentor tank is pulpous state; After above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, then after 1:2 mixes by volume with filtered liquid by ethyl acetate, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata; Above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 80 DEG C, and after being incubated 35min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution; Finally above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 5mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 2 times, leaves standstill 1h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.In the present invention's waste water after treatment, contained chromium content is down to 0.4mg/L from 60mg/L, and clearance reaches 99.3%.
Example 3
First count by weight, win 45 parts of fresh Folium Populi Pseudo-simonii, 25 parts of Folium Pterocaryaes, 30 parts of epipremnum aureums, after above-mentioned leaf clear water is rinsed well, be placed in massfraction be 8% sodium chloride solution soak 35min after, take out, make its natural air drying, and be placed in runner milling and be milled into 200 order powder; By solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, being placed in rotating speed is that the magnetic stirring apparatus of 150 ~ 200r/min stirs 25min, to be mixed complete after, lixiviate 5h, collects filtrate, after repeating lixiviate 3 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use; Get fresh pigskin 1kg, be placed in pulverizer after being ground into 75 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leaves standstill 17min; Count by weight again, by 45 parts of cyclopentadiene, after 35 parts of pentanes and 20 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, carry out sealing and fermenting to it, controlling leavening temperature is 32 DEG C, until the fermented liquid in fermentor tank is pulpous state; After above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, then after 1:2 mixes by volume with filtered liquid by ethyl acetate, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata; Above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 82 DEG C, and after being incubated 35min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution; Finally above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 5mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 2 times, leaves standstill 1h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.In the present invention's waste water after treatment, contained chromium content is down to 0.4mg/L from 65mg/L, and clearance reaches 99.4%.
Claims (1)
1. the treatment process of heavy metal chromium in leather-making waste water, is characterized in that concrete preparation process is:
(1) count by weight, win 40 ~ 60 parts of fresh Folium Populi Pseudo-simonii, 20 ~ 30 parts of Folium Pterocaryaes, 20 ~ 30 parts of epipremnum aureums, after being rinsed well by above-mentioned leaf clear water, being placed in massfraction is after the sodium chloride solution immersion 30 ~ 40min of 9 ~ 10%, takes out, make its natural air drying, and be placed in runner milling and be milled into 50 ~ 60 order powder;
(2) by solid-liquid mass ratio 1:2, after the ethanol being 65% by above-mentioned powder and massfraction mixes, be placed in magnetic stirring apparatus stirring 20 ~ 30min that rotating speed is 150 ~ 200r/min, to be mixed complete after, lixiviate 5 ~ 6h, collects filtrate, after repeating lixiviate 3 ~ 4 times, merging filtrate can obtain mixed plant extracting solution, for subsequent use;
(3) fresh pigskin 1 ~ 2kg is got, be placed in pulverizer after being ground into 180 ~ 260 object pigskin powder, be placed in above-mentioned mixed plant extracting solution, wherein the mass ratio of pigskin powder and plant mixed extract is 1:1, after being uniformly mixed, leave standstill 15 ~ 20min;
(4) count by weight, by 40 ~ 50 parts of cyclopentadiene, after 35 ~ 40 parts of pentanes and 15 ~ 20 parts of polypropylene milling amine are uniformly mixed, by solid-liquid mass ratio 1:5, be added in the turbid liquid of above-mentioned mixing, after being uniformly mixed, move in fermentor tank, carry out sealing and fermenting to it, controlling leavening temperature is 30 ~ 35 DEG C, until the fermented liquid in fermentor tank is pulpous state;
(5) after above-mentioned fermentation completes, the fermented product in fermentor tank is filtered, obtains filtered liquid, after by ethyl acetate, 1:2 mixes by volume with filtered liquid again, pour in separating funnel, leave standstill until after the obvious layering of two-phase, get the ethyl acetate phase solution on upper strata;
(6) above-mentioned ethyl acetate phase solution is placed in beaker, with the speed of 2 DEG C/min, heating schedule intensification is carried out to it, wait to be warming up to 80 ~ 85 DEG C, and after being incubated 30 ~ 40min, stop heating, make it naturally cool to room temperature, 1/2 of original volume is concentrated into it and can obtains chromium treatment solution;
(7) above-mentioned obtained chromium treatment solution is added in leather-making waste water, adds the chromium treatment solution of 4 ~ 5mL in the leather-making waste water of often liter, after being uniformly mixed, aeration is carried out to it, after aeration 2 ~ 3 times, leaves standstill 1 ~ 2h, the floating one deck oil stain of leather-making waste water surface meeting, is wiped off.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107282008A (en) * | 2017-06-07 | 2017-10-24 | 常州市卜诺赛机电技术有限公司 | A kind of preparation method of biomass heavy-metal adsorption material |
| CN109289793A (en) * | 2018-11-29 | 2019-02-01 | 运城学院 | The method for handling and preparing PM2.5 adsorbent of saltouing is assisted using ultrasonic wave |
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| JPH1177028A (en) * | 1997-09-04 | 1999-03-23 | Mitsubishi Nuclear Fuel Co Ltd | Processing of chromium-containing wastewater |
| CN101284700A (en) * | 2008-04-11 | 2008-10-15 | 四川大学 | Treatment of heavy metal and organic matter in water with bio- adsorbent prepared from mushroom |
| CN102849859A (en) * | 2012-09-27 | 2013-01-02 | 西安石油大学 | Method for preparing multifunctional water treatment agent derived from pomegranate bark extract |
| US20140116949A1 (en) * | 2012-10-31 | 2014-05-01 | General Electric Company | Adsorbent composition by a green process and a process for toxic metal ion removal |
| CN103102019A (en) * | 2013-03-01 | 2013-05-15 | 西安石油大学 | Persimmon peel/leaf extract modification and application thereof to oil field water treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107282008A (en) * | 2017-06-07 | 2017-10-24 | 常州市卜诺赛机电技术有限公司 | A kind of preparation method of biomass heavy-metal adsorption material |
| CN109289793A (en) * | 2018-11-29 | 2019-02-01 | 运城学院 | The method for handling and preparing PM2.5 adsorbent of saltouing is assisted using ultrasonic wave |
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