CN111592201A - Electrochemical decomposition method for sludge solid waste - Google Patents
Electrochemical decomposition method for sludge solid waste Download PDFInfo
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- CN111592201A CN111592201A CN202010468027.9A CN202010468027A CN111592201A CN 111592201 A CN111592201 A CN 111592201A CN 202010468027 A CN202010468027 A CN 202010468027A CN 111592201 A CN111592201 A CN 111592201A
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- solid waste
- sludge
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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
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
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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
- C02F11/004—Sludge detoxification
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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
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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
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sludge solid waste environment-friendly treatment, and discloses a sludge solid waste electrochemical decomposition method, which comprises the steps of sending sludge solid waste into a crusher to be treated to obtain crushed sludge solid waste; filling the crushed sludge solid waste into a sludge pit or naturally stacking; sequentially inserting a plurality of anode electrode plates and cathode electrode plates into the sludge solid waste according to the sequence of the anode plates and the cathode plates, and electrifying for a period of time at a certain voltage; and stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, decomposing, airing the storage area to be in a dry soil state, and granulating to obtain the land utilization product. The invention not only enables the sludge solid waste to be treated with high efficiency and harmlessness, but also has artificially controllable rotting and curing conditions, simple treatment facilities, partial heavy metals removal, virus killing and fire extinguishing, effectively improves the efficiency of converting the sludge solid waste into land utilization products, and reduces the secondary environmental pollution caused by other traditional methods to sludge treatment.
Description
Technical Field
The invention belongs to the technical field of sludge environment-friendly treatment, and particularly relates to a sludge solid waste electrochemical decomposition method.
Background
Sludge solid waste (sewage plant sludge, anaerobic digestion biogas residue, agricultural river sludge and the like) with the water content of 60-80% is usually subjected to a decay curing process to be utilized in land. The traditional decomposition and ripening process, aerobic composting and aerobic fermentation, aims to realize reduction and stabilization, has long time, high cost of adding auxiliary materials, can not remove heavy metals, and has poor fertilizer efficiency and pathogen killing effect.
Through the above analysis, the problems and defects of the prior art are as follows: (1) in the prior art, the treatment time of the decomposition process is too long.
(2) In the prior art, the added auxiliary materials have high cost.
(3) In the prior art, heavy metals cannot be removed.
(4) In the prior art, the obtained land utilization product has poor fertilizer efficiency.
(5) In the prior art, the pathogen killing effect is not good.
The difficulty in solving the above problems and defects is:
(1) how to reduce the treatment time of the decomposition and ripening process by the technology.
(2) How to add less auxiliary materials or even not add auxiliary materials by the technology.
(3) How to remove heavy metals by the present technique.
(4) How to enhance the fertilizer efficiency of the land utilization product by the technology.
(5) How to kill pathogens by the present technology.
The significance of solving the problems and the defects is as follows: (1) the technology reduces the processing time of the rotting and curing process, can reduce the occupied area of a rotting and curing process processing workshop, and further reduces the occupied cost.
(2) By adopting the technology, auxiliary materials are added less or even not added, so that the material cost of the decomposition process can be reduced.
(3) The technology can reduce the potential harm of heavy metals to the environment by removing the heavy metals.
(4) The fertilizer efficiency of the land use product is enhanced through the technology, and the potential harm of heavy metals to the environment can be reduced.
(5) By adopting the technology to kill the pathogens, the potential harm of the pathogens to the environment can be reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sludge solid waste electrochemical decomposition method. The electrochemical corrosion curing technology provided by the invention can utilize water in the sludge to generate hydroxyl radicals under the catalytic action of the electrode plate and the voltage, so as to oxidize and decompose refractory organic matters to form micromolecule organic matters convenient for plants to absorb, and simultaneously, due to the electromigration motion of water molecules and heavy metals, the sludge solid waste can be dehydrated to remove the heavy metals. Pathogens can also be killed due to the high temperature and strong oxidative hydroxyl radicals generated by the electrochemical process. The land use product produced by the method has better nutritive value than a biological compost product, has the advantages of short time consumption, less odor, easily controlled reaction conditions, stable treatment effect and the like, and is a novel sludge solid waste decomposition and aging improvement mode.
The invention is realized in such a way that the sludge solid waste electrochemical decomposition method comprises the following steps:
firstly, feeding sludge solid waste into a crusher to be treated to obtain sludge solid waste after crushing treatment;
step two, filling the crushed sludge solid waste into a sludge pit or naturally stacking;
inserting a plurality of anode electrode plates and cathode electrode plates into the sludge in sequence according to the order of the anode plate and the cathode plate, and electrifying for a period of time at a certain voltage;
and step four, stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, carrying out corrosion curing for 24-48 hours, air-drying the electrode plate in a storage area until the electrode plate is dry and muddy, and granulating to obtain a land utilization product.
Further, in the first step, the crushing ratio of the crusher is 3-10.
Further, in the second step, the depth of the sludge pit or the natural stack is 1-1.5 m.
Further, in the third step, the anode plate is a titanium-based iridium dioxide coating electrode, the cathode plate is a titanium electrode plate, the distance between the electrode plates is 5-15cm, the voltage is 50-200V, and the time is 30-60 min.
By combining all the technical schemes, the invention has the advantages and positive effects that: (1) the invention reduces the processing time of the decomposition process. (2) The technology does not need to add auxiliary materials. (3) The technology can remove part of heavy metals. (4) The technology enhances the fertilizer efficiency of the land utilization product. (5) The technology can kill pathogens.
The invention obtains the sludge solid waste after crushing treatment by sending the sludge solid waste into a crusher; filling the crushed sludge solid waste into a sludge pit or naturally stacking; sequentially inserting a plurality of anode electrode plates and cathode electrode plates into the sludge solid waste according to the sequence of the anode plates and the cathode plates, and electrifying for a period of time at a certain voltage; stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, carrying out corrosion curing for 24-48 hours, airing the electrode plate in a storage area until the electrode plate is dry and muddy, and granulating to obtain a land utilization product. The invention not only enables the sludge solid waste to be treated with high efficiency and harmlessness, but also has artificially controllable rotting and curing conditions, simple treatment facilities, partial heavy metals removal, virus killing and fire extinguishing, effectively improves the efficiency of converting the sludge solid waste into land utilization products, and reduces the secondary environmental pollution caused by other traditional methods to sludge treatment.
Technical effect or experimental effect of comparison. (1) Compared with the prior art, the invention reduces the processing time of the decomposition process. (2) Compared with the prior art, the invention does not need to add any auxiliary materials. (3) Compared with the prior art, the invention can remove partial heavy metals. (4) Compared with the prior art, the invention enhances the fertilizer efficiency of the land utilization product. (5) Compared with the prior art, the invention can kill pathogens.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
FIG. 1 is a flow chart of a sludge solid waste electrochemical decomposition method provided by an embodiment of the invention.
FIG. 2 is a graph showing the results of an experiment of sowing rye grass seeds in the sludge treated by the present technology.
FIG. 3 is a diagram of the dewatering of the sludge treated by the present technique according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a sludge solid waste electrochemical decomposition method, which is described in detail with reference to the accompanying drawings.
As shown in fig. 1, the electrochemical decomposition method for sludge solid waste of the invention comprises the following steps:
s101, sending the sludge solid waste into a crusher to be treated to obtain the sludge solid waste after crushing treatment.
S102, filling the crushed sludge solid waste into a sludge pit or naturally stacking.
S103, inserting a plurality of anode electrode plates and cathode electrode plates into the sludge in sequence according to the sequence of the anode plate and the cathode plate, and electrifying for a period of time at a certain voltage.
S104, stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, carrying out corrosion curing for 24-48 hours, air-drying the electrode plate in a storage area until the electrode plate is dry and muddy, and granulating to obtain a land utilization product.
The method adopts an electrochemical decomposition method, an electrode plate is inserted into a pile body of sludge with initial water content of 60-80%, the sludge is electrified at room temperature, the electric field intensity is 5-30V/cm, so that the sludge is dehydrated and heated, heavy metal is taken away from filtrate for 30-60 minutes until the temperature is raised to 60-75 ℃, the water content is reduced to below 60%, then the sludge is stacked and ventilated, decomposed and cured for 24-48 hours, a storage area is air-dried to be in a dry soil shape, and granulation is performed to obtain a land utilization product.
The invention is further described with reference to specific examples.
Example 1
The invention provides a sludge solid waste electrochemical decomposition method, which is characterized by comprising the following steps:
(1) and feeding the sludge into a crusher for treatment to obtain sludge subjected to crushing treatment, wherein the crushing ratio of the crusher is 5.
(2) And naturally stacking the crushed sludge, wherein the depth of the stacked body is 1 m.
(3) The anode plate and the cathode plate are sequentially and vertically inserted into the sludge at the plate interval of 5cm according to the sequence of the anode plate and the cathode plate, the sludge is electrified for 60min at the voltage of 50V, the virus is killed and inactivated at the temperature of about 70 ℃, the heavy metal is removed by 72 percent, the anode plate is a titanium-based iridium dioxide coating electrode, and the cathode plate is a titanium plate.
(4) And stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, decomposing and maturing for 30 hours, airing the storage area to be in a dry soil state, and granulating to obtain a land utilization product with fertilizer efficiency of nitrogen, phosphorus and potassium being more than 3%.
Example 2
The invention provides a sludge solid waste electrochemical decomposition method, which is characterized by comprising the following steps:
(1) and feeding the sludge into a crusher for treatment to obtain sludge subjected to crushing treatment, wherein the crushing ratio of the crusher is 10.
(2) And putting the crushed sludge into a container with a specific shape, wherein the depth of the container is 1.5 m.
(3) The anode plate and the cathode plate are sequentially and vertically inserted into the sludge at the plate interval of 10cm according to the sequence of the anode plate and the cathode plate, the sludge is electrified for 60min at the voltage of 100V, viruses are killed and inactivated at the temperature of about 70 ℃, and heavy metals are removed by 72 percent, the anode plate is a titanium-based iridium dioxide coating electrode, and the cathode plate is a titanium plate.
(4) And stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, carrying out decay curing for 40 hours, airing the storage area to be in a dry soil state, and granulating to obtain a land utilization product with fertilizer efficiency of nitrogen, phosphorus and potassium being more than 3%.
Example 3
The invention provides a sludge solid waste electrochemical decomposition method, which is characterized by comprising the following steps:
(1) and feeding the sludge into a crusher for treatment to obtain sludge subjected to crushing treatment, wherein the crushing ratio of the crusher is 8.
(2) And naturally stacking the crushed sludge, wherein the depth of the stacking body is 1.5 m.
(3) The anode plate and the cathode plate are sequentially and vertically inserted into the sludge at the plate interval of 15cm according to the sequence of the anode plate and the cathode plate, the sludge is electrified for 45min at the voltage of 150V, the virus is killed and inactivated at the temperature of about 70 ℃, the heavy metal is removed by 72 percent, the anode plate is a titanium-based iridium dioxide coating electrode, and the cathode plate is a titanium plate.
(4) And stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, decomposing and maturing for 30 hours, airing the storage area to be in a dry soil state, and granulating to obtain a land utilization product with fertilizer efficiency of nitrogen, phosphorus and potassium being more than 3%.
The present invention will be further described with reference to specific experiments and effects.
The results of the ryegrass seed sowing experiments of the sludge treated by the technology are shown in figure 2.
The sludge is treated by the technology, and the obtained dehydration condition is shown in figure 3.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. The electrochemical decomposition method for the sludge solid waste is characterized by comprising the following steps of:
firstly, feeding sludge solid waste into a crusher to be treated to obtain sludge solid waste after crushing treatment;
step two, filling the crushed sludge solid waste into a sludge pit or naturally stacking;
inserting a plurality of anode electrode plates and cathode electrode plates into the sludge in sequence according to the order of the anode plate and the cathode plate, and electrifying for a period of time at a certain voltage;
and step four, stopping electrifying, taking out the electrode plate, turning over the stack, ventilating, carrying out corrosion curing for 24-48 hours, air-drying the electrode plate in a storage area until the electrode plate is dry and muddy, and granulating to obtain a land utilization product.
2. The method for electrochemical decomposition of sludge solid waste according to claim 1, wherein in the first step, the crushing ratio of the crusher is 3-10.
3. The method for electrochemically decomposing sludge solid wastes according to claim 1, wherein in the second step, the depth of a sludge pit or a natural heap is 1-1.5 m.
4. The sludge solid waste electrochemical decomposition method as claimed in claim 1, wherein in the third step, the anode plate is a titanium-based iridium dioxide coating electrode, the cathode plate is a titanium electrode plate, the distance between the electrode plates is 5-15cm, the voltage is 50-200V, and the time is 30-60 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010468027.9A CN111592201A (en) | 2020-05-28 | 2020-05-28 | Electrochemical decomposition method for sludge solid waste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010468027.9A CN111592201A (en) | 2020-05-28 | 2020-05-28 | Electrochemical decomposition method for sludge solid waste |
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| CN111592201A true CN111592201A (en) | 2020-08-28 |
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| CN202010468027.9A Pending CN111592201A (en) | 2020-05-28 | 2020-05-28 | Electrochemical decomposition method for sludge solid waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117548477A (en) * | 2024-01-12 | 2024-02-13 | 自然资源部第二海洋研究所 | Sediment heavy metal pollution restoration method |
Citations (6)
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| US4226695A (en) * | 1978-10-20 | 1980-10-07 | Environmental Sciences Associates, Inc. | Electrochemical processing system |
| CN104926066A (en) * | 2015-06-09 | 2015-09-23 | 沈阳建筑大学 | Method for simultaneously realizing heavy metal harmless treatment and deep dehydration for dehydrated sludge |
| CN106064868A (en) * | 2016-07-29 | 2016-11-02 | 美的集团股份有限公司 | Sewage-treatment plant, sewage water treatment method and bio-toilet |
| CN107500815A (en) * | 2017-08-25 | 2017-12-22 | 昆明理工大学 | The aerobic low nitrogen composting method and device strengthened based on oxygen-enriched and free radical |
| TW201838936A (en) * | 2017-04-17 | 2018-11-01 | 朝陽科技大學 | Method of converting sewage sludge to improved soil material converting the sewage sludge containing heavy metals which reduces contamination |
| CN108892553A (en) * | 2018-04-02 | 2018-11-27 | 福建农林大学 | A kind of device and method of electrochemistry auxiliary organic solid waste aerobic compost |
-
2020
- 2020-05-28 CN CN202010468027.9A patent/CN111592201A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4226695A (en) * | 1978-10-20 | 1980-10-07 | Environmental Sciences Associates, Inc. | Electrochemical processing system |
| CN104926066A (en) * | 2015-06-09 | 2015-09-23 | 沈阳建筑大学 | Method for simultaneously realizing heavy metal harmless treatment and deep dehydration for dehydrated sludge |
| CN106064868A (en) * | 2016-07-29 | 2016-11-02 | 美的集团股份有限公司 | Sewage-treatment plant, sewage water treatment method and bio-toilet |
| TW201838936A (en) * | 2017-04-17 | 2018-11-01 | 朝陽科技大學 | Method of converting sewage sludge to improved soil material converting the sewage sludge containing heavy metals which reduces contamination |
| CN107500815A (en) * | 2017-08-25 | 2017-12-22 | 昆明理工大学 | The aerobic low nitrogen composting method and device strengthened based on oxygen-enriched and free radical |
| CN108892553A (en) * | 2018-04-02 | 2018-11-27 | 福建农林大学 | A kind of device and method of electrochemistry auxiliary organic solid waste aerobic compost |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117548477A (en) * | 2024-01-12 | 2024-02-13 | 自然资源部第二海洋研究所 | Sediment heavy metal pollution restoration method |
| CN117548477B (en) * | 2024-01-12 | 2024-04-09 | 自然资源部第二海洋研究所 | Sediment heavy metal pollution restoration method |
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Application publication date: 20200828 |
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