CN101264966A - Method for removing cadmium ion from waste water by waste beer yeast absorption- deposition - Google Patents
Method for removing cadmium ion from waste water by waste beer yeast absorption- deposition Download PDFInfo
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- CN101264966A CN101264966A CNA2008100111009A CN200810011100A CN101264966A CN 101264966 A CN101264966 A CN 101264966A CN A2008100111009 A CNA2008100111009 A CN A2008100111009A CN 200810011100 A CN200810011100 A CN 200810011100A CN 101264966 A CN101264966 A CN 101264966A
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Abstract
A method for removing cadmium ions from wastewater by adsorption-precipitation with waste beer yeast comprises the steps of preparing waste beer yeast adsorbent from waste beer yeast, adding into cadmium-containing wastewater solution, adjusting pH in the range of 5-8, stirring at room temperature and stirring speed of 800-1,000 r/min, standing for 120-210 min, and removing the waste beer yeast adsorbent with adsorbed cadmium ions. The inventive method removes cadmium ions from cadmium-containing wastewater by utilizing good cadmium adsorption and good precipitation effect of waste beer yeast; has the advantages of simple process, high treatment efficiency, low cost, and no secondary pollution; and is very important for controlling cadmium-containing wastewater pollution.
Description
Technical field
The present invention relates to a kind of method of removing cadmium ion in the cadmium wastewater, especially a kind of method of utilizing waste beer yeast to handle the low waste water of concentration of cadmium ions.
Background technology
Cadmium wastewater is one of trade effluent that environmental pollution is the most serious, harm is maximum, and cadmium and compound thereof are widely used in aspects such as plating, pigment, stabilizer for plastics, silver-cadmium cell and alloy.Along with the increase of industrial cadmium consumption, the pollution of cadmium also is on the rise.Cadmium is the very strong heavy metal of a kind of toxicity, enters to form the poisoning of accumulation property behind the human body, and China national environmental law regulation cadmium is a pollutant.
The method of the processing cadmium wastewater that adopts has chemical method and physico-chemical processes at present, chemical method mainly is divided into neutralization precipitation method, sulphide precipitation and ferrite process, it is low that the neutralization precipitation method has processing costs, advantage of simple technology, but this method sediment weight is big, go out water hardness height, speed of response is slow, and can cause secondary pollution; Sulphide precipitation is easy to control, and cadmium clearance height, but the sediment water ratio that this method produces is low, forms secondary pollution, and vulcanizing agent price height are difficult to widespread use industrial; Ferrite process can not cause secondary pollution, but this method is wayward, and can not reclaim heavy metal separately.Physico-chemical processes mainly is divided into ion exchange method and membrane separation process, and the shortcoming of ion exchange method is the resin vulnerable to pollution, the process cost height; Membrane separation process technology is simple, but invests higherly, and fenestra easily stops up, these drawbacks limit the extensive use of this method.
When concentration of cadmium ions in the waste water was low, all there was the relative higher shortcoming with process cost of material cost in above method, has a strong impact on economic benefit, can't satisfy the demand of preserving the ecological environment.
Summary of the invention
The purpose of this invention is to provide a kind of is raw material with the waste beer yeast that produces in the beer brewing process, make sorbent material through simple washing pre-treatment, utilize waste beer yeast to the favourable absorption of cadmium and itself sedimentation effect preferably, cadmium ion in the waste water is adsorbed and precipitates in liquid, reach the method for removing cadmium ion composition in the waste water.
The technical scheme of present method is:
1, preparation of adsorbent: in clear water, add waste beer yeast, add-on is 2.5%～5% of a Total Water, speed with 600r/min stirs 10min, and with the speed centrifugation 8min of 5000r/min, the solid phase after the centrifugation is promptly as the waste beer yeast sorbent material then.
2, adsorption test: the waste beer yeast sorbent material is placed waste water, and add-on is 28～50g/L, and adjusting the pH value is 5～8, at room temperature, and with speed whip attachment 30～60min of 800～1000r/min.The waste water solution that forms after absorption finished is removed the waste beer yeast sorbent material through 15000r/min centrifugation 5min, gets the concentration that clear liquid is measured cadmium ion in the water, calculates the adsorption rate Q of cadmium ion.Calculation formula is
Q＝(1-C/C
0)×100％
In the formula, C is the concentration of cadmium ion in the original solution, mg/L, C
0Be the concentration through the cadmium ion in the solution after the centrifugation, mg/L.
3, precipitation test: the waste water solution after absorption finished staticly settles 120～210min.The upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated the solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculate deposition rate P.Calculation formula is
P＝G
2/(G
1+G
2)×100％
In the formula, G
1And G
2Be respectively the weight of having adsorbed the waste beer yeast of cadmium ion in the upper strata stillness of night and the throw out, mg.
4, calculate the clearance M of cadmium ion in the waste water.Calculation formula is:
M＝P×Q×100％
Advantage of the present invention is that settling velocity is fast, good separating effect, and starting material are the wine brewing waste, and wide material sources are with low cost, just can be used as heavy metal absorbent through simple water treatment, and waste beer yeast is dead thalline, and than the stable performance of viable bacteria body, adaptive faculty is strong.This method is efficient, environmental protection, cheapness, non-secondary pollution.
Embodiment
The invention process adopts Electroplate Factory's cadmium wastewater, and concentration of cadmium ions is 26mg/L in the waste water.
The invention process adopts the HCl or the NaOH aqueous solution to regulate waste water ph.
It is raw material that the invention process adopts the waste beer yeast that produces in the beer brewing process, the making method of waste beer yeast sorbent material is: add waste beer yeast in clear water, add-on is 2.5%～5% of a Total Water, speed with 600r/min stirs 10min, with the speed centrifugation 8min of 5000r/min, the solid phase after the centrifugation is promptly as the waste beer yeast sorbent material then.
Waste beer yeast sorbent material consumption in the invention process is the mass concentration of centrifugation solid phase in every liter of waste water.
Embodiment 1 is in the waste water of 26mg/L at concentration of cadmium ions, add the waste beer yeast sorbent material, consumption is 28g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 30min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 90.27%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 99.81%.The clearance of cadmium is 90.10%.
Embodiment 2 is in the waste water of 26mg/L at concentration of cadmium ions, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 30min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 95.75%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 99.81%.The clearance of cadmium is 95.57%.
Embodiment 3 is in the waste water of 26mg/L at concentration of cadmium ions, add the waste beer yeast sorbent material, consumption is 50g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 30min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 96.36%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 99.81%.The clearance of cadmium is 96.18%.
Embodiment 4 is in the waste water of 26mg/L at concentration of cadmium ions, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 5, with the speed whip attachment 30min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 96.00%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 95.77%.The clearance of cadmium is 91.94%.
Embodiment 5 is in the waste water of 26mg/L at concentration of cadmium ions, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 50min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 96.55%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 98.13%.The clearance of cadmium is 94.75%.
Embodiment 6 is in the waste water of 26mg/L at cadmium ion content, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 8, with the speed whip attachment 30min of 800r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 94.72%; Staticly settle 210min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 99.81%.The clearance of cadmium ion is 94.54%.
Embodiment 7 is in the waste water of 26mg/L at cadmium ion content, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 30min of 1000r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 96.59%; Staticly settle 120min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 89.16%.The clearance of cadmium ion is 86.12%.
Embodiment 8 is in the waste water of 26mg/L at cadmium ion content, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 50min of 1000r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 97.35%; Staticly settle 160min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 93.92%.The clearance of cadmium ion is 91.43%.
Embodiment 9 is in the waste water of 26mg/L at cadmium ion content, add the waste beer yeast sorbent material, consumption is 40g/L, at ambient temperature, regulating the pH value is 7, with the speed whip attachment 60min of 1000r/min, the waste water solution that forms after absorption finished is through 15000r/min centrifugation 5min, remove the waste beer yeast sorbent material, get the concentration that clear liquid is measured cadmium ion in the water, the adsorption rate of calculating cadmium ion is 97.58%; Staticly settle 200min, the upper strata stillness of night and throw out respectively through 15000r/min centrifugation 5min, are separated solid phase that the back produces and dry, weigh under 50 ℃ respectively, calculating deposition rate is 95.64%.The clearance of cadmium ion is 93.33%.
Claims (2)
1, a kind of waste beer yeast absorption-deposition is removed the method for cadmium ion in the waste water, it is characterized in that: in containing the waste water of cadmium ion, add the waste beer yeast sorbent material, the consumption of sorbent material is every liter of waste water 28～50g, be under 5～8 the condition in room temperature and pH value, stir 30～60min with the speed of 800～1000r/min; Waste water after absorption finished staticly settles 120～210min, removes the waste beer yeast sorbent material that is adsorbed with cadmium ion.
2, waste beer yeast absorption-deposition according to claim 1 is removed the method for cadmium ion in the waste water, it is characterized in that waste beer yeast preparation of adsorbent method: in clear water, add waste beer yeast, add-on is 2.5%～5% of a Total Water, speed with 600r/min stirs 10min, with the speed centrifugation 8min of 5000r/min, the solid phase after the centrifugation is promptly as the waste beer yeast sorbent material then.
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|---|---|---|---|
| CNA2008100111009A CN101264966A (en) | 2008-04-18 | 2008-04-18 | Method for removing cadmium ion from waste water by waste beer yeast absorption- deposition |
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|---|---|---|---|
| CNA2008100111009A CN101264966A (en) | 2008-04-18 | 2008-04-18 | Method for removing cadmium ion from waste water by waste beer yeast absorption- deposition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228823A (en) * | 2011-04-26 | 2011-11-02 | 中南民族大学 | Modified beer waste yeast adsorbent, preparation method and application thereof |
| CN103011439A (en) * | 2011-09-20 | 2013-04-03 | 无锡尚德太阳能电力有限公司 | Cadmium-containing wastewater treatment method |
| CN104560804A (en) * | 2014-12-25 | 2015-04-29 | 洪湖市添瑞生物制品厂 | Mixed microbial agent for soil remediation, and preparation method and application thereof |
| CN110054357A (en) * | 2019-04-23 | 2019-07-26 | 陈淡宁 | The comprehensive processing method of heavy metal and organic pollution water body |
| CN111518696A (en) * | 2020-03-17 | 2020-08-11 | 徐州工程学院 | Preparation method and application of microbial soil remediation agent |
| CN111925950A (en) * | 2020-03-17 | 2020-11-13 | 徐州工程学院 | High-cadmium-resistance strain and separation and screening method thereof |
-
2008
- 2008-04-18 CN CNA2008100111009A patent/CN101264966A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102228823A (en) * | 2011-04-26 | 2011-11-02 | 中南民族大学 | Modified beer waste yeast adsorbent, preparation method and application thereof |
| CN103011439A (en) * | 2011-09-20 | 2013-04-03 | 无锡尚德太阳能电力有限公司 | Cadmium-containing wastewater treatment method |
| CN104560804A (en) * | 2014-12-25 | 2015-04-29 | 洪湖市添瑞生物制品厂 | Mixed microbial agent for soil remediation, and preparation method and application thereof |
| CN110054357A (en) * | 2019-04-23 | 2019-07-26 | 陈淡宁 | The comprehensive processing method of heavy metal and organic pollution water body |
| CN111518696A (en) * | 2020-03-17 | 2020-08-11 | 徐州工程学院 | Preparation method and application of microbial soil remediation agent |
| CN111925950A (en) * | 2020-03-17 | 2020-11-13 | 徐州工程学院 | High-cadmium-resistance strain and separation and screening method thereof |
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Open date: 20080917 |