CN110194572A - A kind of method of polyacrylamide in degradation domestic sludge - Google Patents
A kind of method of polyacrylamide in degradation domestic sludge Download PDFInfo
- Publication number
- CN110194572A CN110194572A CN201910511303.2A CN201910511303A CN110194572A CN 110194572 A CN110194572 A CN 110194572A CN 201910511303 A CN201910511303 A CN 201910511303A CN 110194572 A CN110194572 A CN 110194572A
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- Prior art keywords
- domestic sludge
- polyacrylamide
- degradation
- fermentation
- temperature
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to it is a kind of degradation domestic sludge in polyacrylamide method, this method comprises: by moisture content be 80%-85% domestic sludge and smashed stalk be by weight 1:1 ratio investment fermentation cauldron in after, be added MOF-Ti, hot fermentation bacterium；The temperature of fermentation cauldron is maintained at 90 DEG C -110 DEG C, start fermentation cauldron and carries out high-temperature stirring and the 2h-3h that ferments, domestic sludge after fermentation is laid on ground and carries out Temperature fall, dehydration, up to the innoxious domestic sludge after decomposition, this method have it is easy to operate, degradation quickly, simple process, it is low in cost, it has broad application prospects in terms of the domestic sludge processing containing polyacrylamide.
Description
Technical field
The present invention relates to a kind of methods of polyacrylamide in environmental technology field, in particular to degradation domestic sludge.
Background technique
At present for domestic sludge processing method mainly with bury based on, but in domestic sludge polyacrylamide flocculation
Afterwards, the sludge that moisture content is 80%-85% is up to 2 years or more in the time of nature natural decomposition, and in degradation process
Stench can be generated, due to the high domestic sludge substantial amounts of moisture content, placement region is caused to take up a large area, is gathered in stacking process
Acrylamide slow mechanical degradation (heat, machinery), chemical degradation (hydrolysis, oxidation and catalysis oxidation) in the environment of nature
And biodegrade, various oligomer and the hypertoxic acrylamide monomer with neurotoxicity are ultimately generated, to the area of storage
Environment causes secondary pollution.How polyacrylamide is rapidly decomposed into small molecule or simple innoxious molecular structure,
So that it is in the soil environment of investment, it, can be with natural decomposition at CO by 2-3 months2、H2O, nitrate forms innoxious place
It manages into and is an urgent problem to be solved currently.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of methods of polyacrylamide in degradation domestic sludge, can
Handle the polyacrylamide in sludge.
In order to solve the above technical problems, one technical scheme adopted by the invention is that: it provides in a kind of degradation domestic sludge
The method of polyacrylamide, it is characterised in that follow these steps to carry out: a, the domestic sludge and powder that are 80%-85% by moisture content
Stalk after broken is put into fermentation cauldron by weight the ratio of 1:1, the MOF- that then investment weight ratio is 0.003% respectively
Ti, the hot fermentation bacterium that weight ratio is 0.001%；B, the temperature of fermentation cauldron is maintained at 90 DEG C -110 DEG C, starting fermentation cauldron into
Domestic sludge after fermentation is finally laid on ground and carries out Temperature fall, dehydration, i.e., by row high-temperature stirring and the 2h-3h that ferments
Domestic sludge after must decomposing.
As a preferred technical solution of the present invention, the MOF-Ti is Mitsubishi's mirror-type knot of the organic ligand containing carboxyl
Structure, central metallic ions Ti.
As a preferred technical solution of the present invention, when temperature is 90 DEG C in step b, the half-life period of polyacrylamide is
2.6h can effectively kill the anaerobic bacteria in sludge, sludge does not generate stench so that treated at 90 DEG C or more.
As a preferred technical solution of the present invention, the hot fermentation bacterium in step a is microorganism, through microorganism pair
The demand of C, N element in domestic sludge carry out absorption capture, retain effective element, and no longer regroup to form propylene
The product of amide forms harmless treatment.
Polyacrylamide it is destructurized after, lose its water absorbing capacity, and then accelerate the speed of moisture evaporation therein,
In the environment of natural temperature is 25 DEG C, the moisture content of sludge can be reduced to 20% hereinafter, forming minimizing after 1-2 days
Processing.
The beneficial effects of the present invention are: present invention application luminous energy conversion method and hot fermentation method combine, destroy first poly-
C-C key, c h bond, the C-N key of acrylamide lead to the molecular chain rupture of polymer, form polymer chain radical, Jin Eryin
Free polymer readical chemical reaction is sent out, so that the molecular weight of polymer and molecular structure is changed, principle is to pass through light energy
Conversion destroys the electronics pair of the hydrogen bond of free radical, oxygen key, allows polymer to form unstable state, to destroy amide base junction
Structure does not generate the monomer of acrylamide in natural degradation, accelerates the decomposition rate of polymer, to destroy polyacrylamide
Its moisture content is reduced to 20% hereinafter, in turn after natural sunlight exposure 1-2 days to the absorptivity of water by structure, reduction
Reach the target of minimizing；Then sorption enhanced is carried out using the nutritional need to the C-N in sludge of microorganism, promotes poly- third
The conversion of acrylamide is completed to domestic sludge minimizing, innoxious processing.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
A kind of method of polyacrylamide in degradation domestic sludge, comprising:
(1) domestic sludge of moisture content 80%-85% and smashed stalk are matched with weight ratio for the ratio of 1:1
Material puts into the material prepared in fermentation cauldron.
(2) by the MOF-Ti of weight ratio 0.003%, fermentation cauldron is put into.
(3) it by the zymophyte of weight ratio 0.001%, is activated after twenty minutes, is put into fermentation cauldron with water.
(4) temperature setting in fermentation cauldron is fermented at 100 DEG C of minimum temperature, is 2h during fermentation, during fermentation
The temperature of fermentation cauldron maintains 90 DEG C -110 DEG C.
(5) start mixing plant during fermenting, be stirred, progress ventilating oxygen is primary within every 20 minutes.
(6) by product after fermentation, tiling irradiates in the sun, maintains the temperature on 25 DEG C or more of ground and carry out
Cooling and dewatering for 24 hours, obtains harmless treatment domestic sludge.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright description is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (4)
1. a kind of method of polyacrylamide in degradation domestic sludge, it is characterised in that follow these steps to carry out:
A, by moisture content be 80%-85% domestic sludge and smashed stalk be by weight 1:1 ratio put into fermentation cauldron
In, MOF-Ti, hot fermentation bacterium is added；
B, the temperature of fermentation cauldron is maintained at 90 DEG C -110 DEG C, starting fermentation cauldron carries out high-temperature stirring and the 2h-3h that ferments, and will ferment
Domestic sludge after the completion, which is laid on ground, carries out Temperature fall, dehydration to get the innoxious domestic sludge after decomposition.
2. the method for polyacrylamide in a kind of degradation domestic sludge according to claim 1, it is characterised in that: described
MOF-Ti is Mitsubishi's mirror-type structure of the organic ligand containing carboxyl, central metallic ions Ti.
3. the method for polyacrylamide in a kind of degradation domestic sludge according to claim 1, it is characterised in that: described
The weight ratio of MOF-Ti is 0.003%.
4. the method for polyacrylamide in a kind of degradation domestic sludge according to claim 1, it is characterised in that: the height
The zymogenic weight ratio of temperature is 0.001%, and is activated with water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910511303.2A CN110194572A (en) | 2019-06-13 | 2019-06-13 | A kind of method of polyacrylamide in degradation domestic sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910511303.2A CN110194572A (en) | 2019-06-13 | 2019-06-13 | A kind of method of polyacrylamide in degradation domestic sludge |
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| Publication Number | Publication Date |
|---|---|
| CN110194572A true CN110194572A (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910511303.2A Pending CN110194572A (en) | 2019-06-13 | 2019-06-13 | A kind of method of polyacrylamide in degradation domestic sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112680480A (en) * | 2021-01-04 | 2021-04-20 | 同济大学 | Anaerobic fermentation method for organic solid waste |
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| CN112680480A (en) * | 2021-01-04 | 2021-04-20 | 同济大学 | Anaerobic fermentation method for organic solid waste |
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Application publication date: 20190903 |