CN111940471A - Method for reducing organic matter content in solid waste - Google Patents
Method for reducing organic matter content in solid waste Download PDFInfo
- Publication number
- CN111940471A CN111940471A CN202010933166.4A CN202010933166A CN111940471A CN 111940471 A CN111940471 A CN 111940471A CN 202010933166 A CN202010933166 A CN 202010933166A CN 111940471 A CN111940471 A CN 111940471A
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- China
- Prior art keywords
- solid waste
- persulfate
- mass
- hydrogen peroxide
- ferrous sulfate
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- 239000002910 solid waste Substances 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000005416 organic matter Substances 0.000 title claims abstract description 10
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 57
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 27
- 239000004568 cement Substances 0.000 claims abstract description 17
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 10
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 10
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims description 34
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 24
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000002245 particle Substances 0.000 claims description 17
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 230000001590 oxidative effect Effects 0.000 abstract description 5
- 239000012265 solid product Substances 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract 1
- 238000005303 weighing Methods 0.000 description 18
- 230000015556 catabolic process Effects 0.000 description 11
- 238000006731 degradation reaction Methods 0.000 description 11
- 239000003814 drug Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000009270 solid waste treatment Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/20—Agglomeration, binding or encapsulation of solid waste
- B09B3/25—Agglomeration, binding or encapsulation of solid waste using mineral binders or matrix
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a method for reducing the organic matter content of solid waste, belonging to the field of solid waste removal treatment. According to the invention, hydrogen peroxide or ferrous sulfate is used for activating persulfate to generate sulfate radical, then the strong oxidizing property of the sulfate radical is used for oxidizing and decomposing organic matters in the solid waste, so that the purpose of safe landfill is achieved, and finally the solid waste is wrapped by cement, so that the harmful cost in the solid waste is not easy to leach out, the stability of a solid product is increased, and the landfill safety is further improved. The method for reducing the organic matter content of the solid waste has the advantages of good treatment effect on the solid waste, simple operation, short treatment period, high efficiency, low cost and easy industrial application.
Description
Technical Field
The invention belongs to the field of solid waste treatment, and particularly relates to a method for reducing the content of organic matters in solid waste.
Background
With the rapid development of the industry, some solid wastes with high organic content are generated in the industrial production process. The solid waste has high organic matter content, and if the solid waste is directly buried, soil is polluted, and part of organic pollutants in the solid waste is transferred to a water body due to leaching of rainwater and migration of underground water, so that secondary pollution is caused.
Currently, solid waste with high organic content is generally treated by microbial degradation or incineration. The microbial degradation mainly utilizes microorganisms to carry out biochemical reaction to degrade organic matters of the solid waste, and the method has long treatment time and low efficiency. The incineration disposal is mainly characterized in that solid wastes and other dangerous wastes are mixed according to furnace conditions and are incinerated and disposed in landfills through incineration systems such as a rotary kiln and a secondary combustion chamber, and the method needs to reasonably select a mixing scheme, so that the method has certain loss on equipment, is relatively complex to operate and has high disposal cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a method for reducing the content of organic matters in solid waste so as to simplify the treatment process, shorten the treatment period, improve the treatment efficiency and reduce the treatment cost.
To achieve the above object, the present invention provides a method for reducing organic matter content of solid waste, comprising the steps of:
(1) adding persulfate and water into the solid waste, and uniformly stirring;
(2) adding hydrogen peroxide or ferrous sulfate, stirring uniformly, or standing or stirring for reaction after stirring uniformly;
(3) adding cement to cure.
The method adopts a chemical reaction method to reduce the content of organic matters in the solid waste, utilizes hydrogen peroxide or ferrous sulfate to activate persulfate so as to generate sulfate radical, then utilizes the strong oxidizing property of the sulfate radical to degrade the organic matters in the solid waste, and finally wraps the solid waste by cement so as to ensure that harmful components in the solid waste are not easy to leach out and increase the stability of solid products. The method has the advantages of simple operation, short treatment period, high efficiency and low cost.
As a preferred embodiment of the method of the present invention, the steps (1) to (2) are repeated 1 or more times before the step (3) is performed. The steps (1) to (2) can be repeated according to the content of organic matters in the solid waste so as to improve the degradation rate of the organic matters; compared with the method that persulfate and hydrogen peroxide or persulfate and ferrous sulfate are added into the solid waste once and added in batches, the method can ensure that the persulfate is activated better by the hydrogen peroxide or the ferrous sulfate, so that the degradation rate of organic matters is higher.
As a preferred embodiment of the method of the present invention, the total mass of the persulfate is 5% to 50% of the mass of the solid waste. When the total mass of the persulfate is less than 5% of the mass of the solid waste, the degradation effect of the organic matters is not obvious, and the degradation requirement cannot be met; when the total mass of the persulfate is higher than 50% of the mass of the solid waste, the cost of the medicament is high, and the residual excessive persulfate can cause the increase of the content of organic matters and influence the degradation effect, so the treatment effect and the production cost are comprehensively considered, and the total mass of the persulfate is selected to be 5% -50% of the mass of the solid waste.
As a preferred embodiment of the process of the present invention, in the step (1), the ratio of the persulfate to the water is 0.5 to 1.5mol: 1L.
In a preferred embodiment of the method of the present invention, in the step (1), the persulfate is at least one of potassium persulfate and sodium persulfate.
As a preferred embodiment of the method of the present invention, in the step (1), the persulfate and water are added to the solid waste in the form of a persulfate solution. Therefore, persulfate and solid waste can be mixed more fully, and the degradation of organic matters is facilitated.
As a preferred embodiment of the method of the present invention, the ferrous sulfate is ferrous sulfate heptahydrate, and the total mass of the ferrous sulfate heptahydrate is 2 to 26% of the mass of the solid waste. When the total mass of the ferrous sulfate heptahydrate is less than 2% of the mass of the solid waste, the degradation effect of organic matters is not obvious; when the total mass of the ferrous sulfate heptahydrate is higher than 26% of the mass of the solid waste, the cost of the medicament is too high, and the degradation effect of organic matters is not obviously improved, so that the degradation effect and the production cost are comprehensively considered, and the total mass of the ferrous sulfate heptahydrate is selected to be 2-26% of the mass of the solid waste.
As a preferred embodiment of the process of the invention, the total mass of hydrogen peroxide in the hydrogen peroxide solution is between 0.45% and 7.5% of the mass of the solid waste. When the total mass of hydrogen peroxide in the hydrogen peroxide solution is less than 0.45 percent of the mass of the solid waste, the persulfate activation effect is poor; when the total mass of the hydrogen peroxide in the hydrogen peroxide is higher than 7.5% of the mass of the solid waste, a Fenton reaction emits a large amount of heat, so that the total mass of the hydrogen peroxide in the hydrogen peroxide is selected to be 0.45% -7.5% of the mass of the solid waste in consideration of the treatment effect and safety.
As a preferred embodiment of the method of the invention, the mass of said cement is between 5% and 80% of the mass of said solid waste. When the mass of the cement is less than 5% of the mass of the solid waste, the strength of the cured body after curing is too low, and the curing effect is not good; when the mass of the cement is higher than 80% of the mass of the solid waste, the cost of the medicament is too high, and the pH value of a solidified body is easily over-standard, so that the solidification effect and the solidification cost are comprehensively considered, and the mass of the cement is selected to be 5% -80% of the mass of the solid waste.
As a preferred embodiment of the method of the present invention, the particle size of the solid waste is less than 60 mm. The solid waste is crushed to the particle size of less than 60mm, so that the solid waste is fully contacted with the medicament (namely persulfate and hydrogen peroxide or ferrous sulfate), and organic matters in the solid waste are fully degraded.
In a preferred embodiment of the method of the present invention, in the step (2), the reaction is performed by stirring and then standing or stirring, and the reaction time is 5min or more to allow the reaction to proceed sufficiently.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, hydrogen peroxide or ferrous sulfate is used for activating persulfate to generate sulfate radical, and then the strong oxidizing property of the sulfate radical is used for oxidizing and decomposing organic matters in the solid waste, so that the purpose of safe landfill is achieved, and finally the solid waste is wrapped by cement, so that the harmful cost in the solid waste is not easy to leach out, the stability of a solid product is increased, and the landfill safety is further improved; the method for reducing the organic matter content of the solid waste has the advantages of good treatment effect on the solid waste, simple operation, short treatment period, high efficiency, low cost and easy industrial application.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 10g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 14mL of hydrogen peroxide (the mass concentration of hydrogen peroxide is 30%, and the density is 1.11g/mL) into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) 20g of cement was added for curing.
Example 2
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 16g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 20mL of hydrogen peroxide (with the mass concentration of hydrogen peroxide being 30%) into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) weighing 10g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(5) adding 14mL of hydrogen peroxide (with the mass concentration of hydrogen peroxide being 30%) into the solid waste, stirring uniformly, and standing for reaction for 5 min;
(6) 40g of cement was added for curing.
Example 3
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 16g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 8g of ferrous sulfate heptahydrate into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) weighing 10g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(5) adding 5g of ferrous sulfate heptahydrate into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(6) 40g of cement was added for curing.
Example 4
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 10g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 2.73mL of hydrogen peroxide (with the mass concentration of hydrogen peroxide being 30%) into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) 10g of cement was added for curing.
Example 5
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 10g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 0.5mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 4g of ferrous sulfate heptahydrate into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) 50g of cement was added for curing.
Example 6
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 60g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1.5mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 27.27mL of hydrogen peroxide (with the mass concentration of hydrogen peroxide being 30%) into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) weighing 40g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(5) adding 18.18mL of hydrogen peroxide (with the mass concentration of hydrogen peroxide being 30%) into the solid waste, stirring uniformly, and standing for reaction for 5 min;
(6) 100g of cement was added for curing.
Example 7
This embodiment is an embodiment of the method for reducing organic content of solid waste of the present invention, and the method for reducing organic content of solid waste of this embodiment comprises the following steps:
(1) weighing 200g of solid waste, and crushing the solid waste into particles with the particle size less than 60 mm;
(2) weighing 70g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1.5mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(3) adding 36.4g of ferrous sulfate heptahydrate into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(4) weighing 30g of potassium peroxodisulfate, dissolving the potassium peroxodisulfate into 1mol/L solution by water, adding the solution into the solid waste, and uniformly stirring;
(5) adding 15.6g of ferrous sulfate heptahydrate into the solid waste, uniformly stirring, and standing for reaction for 5 min;
(6) 160g of cement was added for curing.
Examples of effects
The organic matter content and the solidification rate before and after the solid waste treatment in examples 1 to 7 were measured, and the results are shown in table 1. The calculation formula of the organic matter curing rate is as follows:
TABLE 1 statistics of treatment effectiveness
In examples 6 and 7, excessive persulfate is adopted, and the persulfate remained after curing interferes with the detection of the organic matters, so that the content of the detected organic matters is higher than the actual value.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A method of reducing the organic matter content of solid waste, the method comprising the steps of:
(1) adding persulfate and water into the solid waste, and uniformly stirring;
(2) adding hydrogen peroxide or ferrous sulfate, stirring uniformly, or standing or stirring for reaction after stirring uniformly;
(3) adding cement to cure.
2. The method of claim 1, wherein steps (1) - (2) are repeated more than 1 time before step (3) is performed.
3. The method according to claim 1 or 2, wherein the total mass of the persulfate is 5-50% of the mass of the solid waste.
4. The method according to claim 1 or 2, wherein in the step (1), the ratio of the persulfate to the water is 0.5-1.5mol: 1L.
5. The method according to claim 1 or 2, wherein in the step (1), the persulfate is at least one of potassium persulfate and sodium persulfate, and the persulfate and water are added to the solid waste in the form of a persulfate solution.
6. The method according to claim 1 or 2, wherein the ferrous sulfate is ferrous sulfate heptahydrate, and the total mass of the ferrous sulfate heptahydrate is 2-26% of the mass of the solid waste.
7. A method according to claim 1 or 2, characterized in that the total mass of hydrogen peroxide in the hydrogen peroxide solution is 0.45-7.5% of the mass of the solid waste.
8. A method according to claim 1 or 2, characterized in that the mass of cement is 5-80% of the mass of solid waste.
9. The method according to claim 1 or 2, wherein the particle size of the solid waste is less than 60 mm.
10. The method according to claim 1 or 2, wherein in the step (2), the reaction is performed by standing or stirring after stirring uniformly, and the reaction time is 5min or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010933166.4A CN111940471A (en) | 2020-09-07 | 2020-09-07 | Method for reducing organic matter content in solid waste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010933166.4A CN111940471A (en) | 2020-09-07 | 2020-09-07 | Method for reducing organic matter content in solid waste |
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