CN102992457A - Method for producing coagulant aid through utilizing cow dung - Google Patents
Method for producing coagulant aid through utilizing cow dung Download PDFInfo
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- CN102992457A CN102992457A CN201210482387XA CN201210482387A CN102992457A CN 102992457 A CN102992457 A CN 102992457A CN 201210482387X A CN201210482387X A CN 201210482387XA CN 201210482387 A CN201210482387 A CN 201210482387A CN 102992457 A CN102992457 A CN 102992457A
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Abstract
The invention provides a method for producing a coagulant aid through utilizing cow dung. According to the method, the cow dung is utilized as a main raw material, and the cow dung is subjected to a series of processing to obtain the coagulant aid which can be used for wastewater treatment. The method has the characteristics that the selected material is environment-friendly and waste recovery is realized.
Description
Technical field
The present invention relates to a kind of preparation method of coagulant aids, relate to especially and a kind ofly utilize cow dung to be the preparation method of the coagulant aids of main raw material(s).
Background technology
In water treatment method, flocculence is one of important method.Present employed flocculation agent and coagulant aids are mainly mineral compound and artificial synthetic organic materials.The inorganic flocculating agent consumption is large, easily produces secondary pollution, and the particularly extensive application of aluminium salt becomes increasingly conspicuous on the impact of environment, especially to the processing of tap water, uses in a large number aluminium salt, can cause the senile dementia sickness rate to rise.Because the artificial synthetic macromolecule organic compound of great majority is as the use of flocculation agent or coagulant aids, the monomer that remains in the water has toxicity, is detrimental to health, such as the polyacrylamide of generally using at present.The research of current emerging biological flocculant has caused people's concern, and it has effect stability, biodegradable, non-secondary pollution, the excellent characteristic such as safe and harmless.Because biological flocculant still is in conceptual phase, and industrial scale is little, cost is large, fails to be used widely at present.
Using natural materials to prepare coagulant aids is the another way that reduces the inorganic flocculating agent usage quantity, the coagulant aids that natural materials is made has effect stability, biodegradable, non-secondary pollution, the excellent characteristic such as safe and harmless equally, by the flocculation ability of increase inorganic flocculating agent, and reach the use that reduces inorganic flocculating agent.
Summary of the invention
The invention provides a kind of method of utilizing cow dung to make coagulant aids, the method utilizes cow dung to be main raw material(s), obtain being used for the coagulant aids of waste water control by cow dung being carried out a series of processing, the method have the environmental protection of drawing materials, can utilization of waste material characteristics.The method may further comprise the steps:
(1) cow dung air-dry and clearing up: the fresh cow dung that will collect is air-dry and break powdered into pieces, will do subsequently the cow dung powder and place 20% hydrochloric acid soln, stirring reaction 10～15 minutes;
(2) modification of cow dung: the triethylamine solution of first cow dung of handling well in the step (1) being put into pH13 soaked 30～40 minutes, the cow dung that to soak subsequently is positioned in 45～50 degrees centigrade the modification liquid, the modified-reaction time is 70～90 minutes, and modification liquid is a kind of in 0.5%～1% acrylic acid solution and 0.5%～1% acrylic ester solution;
(3) solid residue is removed: aforesaid liquid first with the screening of 100～120 μ m bolting silks, is removed the macrobead foreign material; Then use 30～40 μ m membrane filtrations;
(4) adjustment of pH value: use sodium-acetate with the pH regulator to 6 of the liquid that obtains in the step (3)～7;
(5) seal up for safekeeping, take care of: add 50ppm formaldehyde, then seal in plastic containers In Shade saving backup up for safekeeping.
The mass ratio that feeds intake of above-mentioned raw materials is: do cow dung: hydrochloric acid soln: triethylamine solution: modification liquid=1:(3～5): (2～4): (0.1～0.3).
Principle of the present invention is as follows: moisture more in the fresh cow dung, by mainly containing crude protein and robust fibre after air-dry, clear up by hydrochloric acid, make protein denaturation, at first soaking in triethylamine solution during with post-modification descends cellulose crystallity, the pars amorpha area change makes itself and modification liquid react subsequently, generates the hydroxyl graft polymerization of cellulose surface.
Coagulant aids of the present invention so just can be used with aluminum salt flocculant, increases the ability that catches trickle suspended particle.The throw out alumen ustum that forms is large, and sedimentation is rapid, reduces the usage quantity of aluminium salt.This product has the characteristics such as consumption is few, and it is wide, easy to use to adapt to the PH scope, safe and harmless.Prove by repetition test, can make the usage quantity of aluminium salt reduce by 75% more than by adding this biological coagulant aids.And can meet or exceed the flocculating effect of a large amount of aluminum salt flocculants of independent use.
Embodiment
Below in conjunction with example the method for utilizing cow dung to make coagulant aids of the present invention is described.
The coagulant aids of hereinafter present method of mentioning being produced is to implement like this to the experiment of the effect of aluminum salt flocculant:
At first, the usage quantity of aluminium salt is used separately in the definite former water flocculation of chamber beaker test by experiment, and the original tap water flocculation uses separately the usage quantity of aluminium salt to be generally 20～60PPM; General sewage flocculation uses separately the usage quantity of aluminium salt to be generally 80～140PPM.
Then, biological coagulant aids consumption is determined in beaker test in chamber by experiment, subtract respectively 1/4 according to aluminium salt usage quantity, 1/2,3/4 ground adds aluminium salt, then the coagulant aids that adds the different concns gradient of 0.05～1.00PPM carries out flocculating experiment, determines in order to reach the effect of independent aluminium salt usage quantity, the needed consumption of coagulant aids.
Embodiment 1
Make according to the methods below coagulant aids:
(1) cow dung air-dry and clearing up: the fresh cow dung that will collect is air-dry and break powdered into pieces, will do subsequently the cow dung powder and place 20% hydrochloric acid soln, stirring reaction 10 minutes;
(2) modification of cow dung: the triethylamine solution of first cow dung of handling well in the step (1) being put into pH13 soaked 40 minutes, the cow dung that to soak subsequently is positioned in 45 degrees centigrade the modification liquid, the modified-reaction time is 90 minutes, and modification liquid is 1% acrylic acid solution;
(3) solid residue is removed: aforesaid liquid first with the screening of 100 μ m bolting silks, is removed the macrobead foreign material; Then use 30 μ m membrane filtrations;
(4) adjustment of pH value: use sodium-acetate with the pH regulator to 6 of the liquid that obtains in the step (3)～7;
(5) seal up for safekeeping, take care of: add 50ppm formaldehyde, then seal in plastic containers In Shade saving backup up for safekeeping.
The mass ratio that feeds intake of above-mentioned raw materials is: do cow dung: hydrochloric acid soln: triethylamine solution: modification liquid=1:3:3:0.1.
Experimental result shows: for original tap water, when the aluminum salt flocculant usage quantity is that the 1/4(of independent aluminum salt flocculant usage quantity is 10PPM) time, the coagulant aids 0.8PPM that uses the method for the invention to make can reach the effect of the aluminum salt flocculant of independent use 40PPM.So just greatly reduce the use of aluminum salt flocculant, reduced aluminium residual in the water, alleviated the secondary pollution of using aluminum salt flocculant to bring.
Embodiment 2
Make according to the methods below coagulant aids:
(1) cow dung air-dry and clearing up: the fresh cow dung that will collect is air-dry and break powdered into pieces, will do subsequently the cow dung powder and place 20% hydrochloric acid soln, stirring reaction 15 minutes;
(2) modification of cow dung: the triethylamine solution of first cow dung of handling well in the step (1) being put into pH13 soaked 30～40 minutes, the cow dung that to soak subsequently is positioned in 50 degrees centigrade the modification liquid, the modified-reaction time is 70 minutes, and modification liquid is 1% acrylic ester solution;
(3) solid residue is removed: aforesaid liquid first with the screening of 100 μ m bolting silks, is removed the macrobead foreign material; Then use 30 μ m membrane filtrations;
(4) adjustment of pH value: use sodium-acetate with the pH regulator to 6 of the liquid that obtains in the step (3)～7;
(5) seal up for safekeeping, take care of: add 50ppm formaldehyde, then seal in plastic containers In Shade saving backup up for safekeeping.
The mass ratio that feeds intake of above-mentioned raw materials is: do cow dung: hydrochloric acid soln: triethylamine solution: modification liquid=1:5:4:0.3.
Experimental result shows: for original tap water, when the aluminum salt flocculant usage quantity is that the 1/4(of independent aluminum salt flocculant usage quantity is 10PPM) time, the coagulant aids 0.7PPM that uses the method for the invention to make can reach the effect of the aluminum salt flocculant of independent use 40PPM.So just greatly reduce the use of aluminum salt flocculant, reduced aluminium residual in the water, alleviated the secondary pollution of using aluminum salt flocculant to bring.
Those skilled in the art can make replacement or modification to content of the present invention according to content disclosed by the invention and the art technology of grasping; but these replacements or modification should not be considered as breaking away from the present invention's design, and these replacements or modification are all in the claimed interest field of the present invention.
Claims (3)
1. method of utilizing cow dung to make coagulant aids, the method may further comprise the steps:
(1) modification of cow dung: the triethylamine solution of first cow dung of handling well in the step (1) being put into pH13 soaked 30～40 minutes, the cow dung that to soak subsequently is positioned in 45～50 degrees centigrade the modification liquid, the modified-reaction time is 70～90 minutes, and modification liquid is a kind of in 0.5%～1% acrylic acid solution and 0.5%～1% acrylic ester solution;
(2) solid residue is removed: aforesaid liquid first with the screening of 100～120 μ m bolting silks, is removed the macrobead foreign material; Then use 30～40 μ m membrane filtrations;
(3) adjustment of pH value: use sodium-acetate with the pH regulator to 6 of the liquid that obtains in the step (3)～7;
(4) seal up for safekeeping, take care of: add 50ppm formaldehyde, then seal in plastic containers In Shade saving backup up for safekeeping.
2. the cow dung of utilizing described in the claim 1 is made the method for coagulant aids, it is characterized in that, proceeds as follows first before the modification of step (1) cow dung:
Cow dung air-dry and clearing up: the fresh cow dung that will collect is air-dry and break powdered into pieces, will do subsequently the cow dung powder and place 20% hydrochloric acid soln, stirring reaction 10～15 minutes.
3. the cow dung of utilizing described in the claim 1 is made the method for coagulant aids, it is characterized in that the mass ratio that feeds intake of above-mentioned raw materials is: do cow dung: hydrochloric acid soln: triethylamine solution: modification liquid=1:(3～5): (2～4): (0.1～0.3).
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| CN201210482387XA CN102992457A (en) | 2012-11-25 | 2012-11-25 | Method for producing coagulant aid through utilizing cow dung |
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| CN201210482387XA CN102992457A (en) | 2012-11-25 | 2012-11-25 | Method for producing coagulant aid through utilizing cow dung |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108212098A (en) * | 2018-02-01 | 2018-06-29 | 北京市畜牧业环境监测站 | A kind of cow dung resourceization preparation helps method and the application of solidifying adsorbent |
| CN110550818A (en) * | 2019-08-20 | 2019-12-10 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002101777A (en) * | 2000-07-28 | 2002-04-09 | Sansei Okada | Treatment system for livestock excreta |
| CN101037284A (en) * | 2006-03-31 | 2007-09-19 | 王绍康 | Dejecta treatment method and system |
| CN101665805A (en) * | 2009-09-18 | 2010-03-10 | 重庆工商大学 | Method for producing microbial flocculant by using aquaculture wastewater |
-
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- 2012-11-25 CN CN201210482387XA patent/CN102992457A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002101777A (en) * | 2000-07-28 | 2002-04-09 | Sansei Okada | Treatment system for livestock excreta |
| CN101037284A (en) * | 2006-03-31 | 2007-09-19 | 王绍康 | Dejecta treatment method and system |
| CN101665805A (en) * | 2009-09-18 | 2010-03-10 | 重庆工商大学 | Method for producing microbial flocculant by using aquaculture wastewater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108212098A (en) * | 2018-02-01 | 2018-06-29 | 北京市畜牧业环境监测站 | A kind of cow dung resourceization preparation helps method and the application of solidifying adsorbent |
| CN110550818A (en) * | 2019-08-20 | 2019-12-10 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
| CN110550818B (en) * | 2019-08-20 | 2021-12-07 | 生态环境部华南环境科学研究所 | Efficient biogas slurry desalting treatment process after fermentation of dairy cow breeding wastewater |
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Application publication date: 20130327 |