CN110156288B - Treatment method of river and lake sludge - Google Patents
Treatment method of river and lake sludge Download PDFInfo
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- CN110156288B CN110156288B CN201910470321.0A CN201910470321A CN110156288B CN 110156288 B CN110156288 B CN 110156288B CN 201910470321 A CN201910470321 A CN 201910470321A CN 110156288 B CN110156288 B CN 110156288B
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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
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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
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Treatment Of Sludge (AREA)
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Abstract
The invention discloses a method for treating river and lake sludge, which is characterized in that the river and lake sludge is divided into upper layer sludge and lower layer sludge according to the water content of the sludge, wherein the upper layer sludge is matched with straws and is used for methane fermentation, the lower layer sludge is added with plant ash to adjust the pH value and is heated to kill various microorganisms, and then the lower layer sludge is added with furnace slag to prepare matrix nutrient soil which can be used for greening and effectively utilizes sludge resources; according to the method for treating the river and lake sludge, the used medicines are mainly plant ash and furnace slag, the cost is low, meanwhile, microorganisms in the sludge are inactivated by heating the sludge on the lower layer, and the period is short; in addition, the method for treating the river and lake sludge provided by the invention has simple procedures and can be used for carrying out large-scale treatment on the sludge.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a method for treating sludge in rivers and lakes.
Background
The river and lake sludge contains rich available nitrogen, phosphorus and potassium nutrient elements and organic matters, is a good organic fertilizer source, can increase soil fertility and promote plant growth, and the main methods for treating the sludge at present comprise landfill, composting, incineration, biological treatment and the like. The landfill and incineration are adopted, the energy consumption is large, the resources are wasted, and the treatment period is long although the sludge resources are effectively utilized in a composting mode. The existing biological treatment has the problems of high cost, long period and difficult large-scale treatment.
Disclosure of Invention
The present invention is intended to solve the above technical problems to some extent.
In view of the above, the invention provides a method for treating river and lake sludge, which has the advantages of low cost and short treatment time, and can realize large-scale treatment of sludge.
In order to solve the technical problems, the invention provides a method for treating river and lake sludge, which is used for treating the river and lake sludge with light pollution and is characterized in that: the method comprises the following steps:
s1, performing physical and chemical analysis on sludge, analyzing deep water content of the sludge, and determining the types of microorganisms and the content of organic matters;
s2: processing auxiliary materials, namely determining the proportion of the straws according to the types of microorganisms in the determination result in the S1, crushing the straws and removing wax;
s3: dividing the sludge into upper-layer sludge and lower-layer sludge according to the result of the deep water content of the sludge in the step S1, pumping the upper-layer sludge, uniformly mixing the upper-layer sludge with the straw treated in the step S2, and conveying the mixture to a methane tank for fermentation through a screw pump;
s4: adding plant ash into the lower-layer sludge in the step S3 to adjust the lower-layer sludge to be weakly acidic, loosening the sludge and airing;
s5: digging out the sludge, heating for 10-15 h by adopting a steam guide pipe, and doping slag to obtain the matrix nutrient soil.
Further, the laying depth of the steam guide pipe is 30-50 cm.
Further, in the step S2, the waxiness of the straws is removed by a lime milk method, and the straws are immersed in lime milk for 5-6 min and then fished out and drained.
Further, the water content of the upper layer sludge in the step S3 is more than or equal to 90%.
Further, the pH value of the sludge adjusted in the step S4 is about 4.7-5.3, and the water content of the sludge after airing is about 70%.
Further, in the step S5, the heating temperature is controlled to be 80-90 degrees, the heat source of the steam guide pipe is from the methane generated by the methane tank in the step S3, and the distance between the steam guide pipes is 50-70 cm.
Further, in step S5, the water content of the nutrient soil is about 60%, and the pH value of the nutrient soil is 5.0-7.5.
The invention has the technical effects that: according to the method for treating the river and lake sludge, the river and lake sludge is divided into upper layer sludge and lower layer sludge according to the water content of the sludge, wherein the upper layer sludge is matched with straws and is used for methane fermentation, the lower layer sludge is added with plant ash to adjust the pH value and is heated to kill various microorganisms, and then the furnace slag is added to prepare the matrix nutrient soil which can be used for greening, so that the sludge resource is effectively utilized; according to the method for treating the river and lake sludge, the used medicines are mainly plant ash and furnace slag, the cost is low, meanwhile, microorganisms in the sludge are inactivated by heating the sludge on the lower layer, and the period is short; in addition, the method for treating the river and lake sludge provided by the invention has simple procedures and can be used for carrying out large-scale treatment on the sludge.
Detailed Description
The present invention is further described with reference to specific examples to enable those skilled in the art to better understand the present invention and to practice the same, but the examples are not intended to limit the present invention.
The invention provides a method for treating sludge in rivers and lakes, which is used for treating the sludge in the rivers and lakes with agricultural pollution and comprises the following steps:
s1, performing physical and chemical analysis on sludge, analyzing deep water content of the sludge, and determining the types of microorganisms and the content of organic matters;
s2: processing auxiliary materials, namely determining the proportion of the straws according to the types of microorganisms in the determination result in the S1, crushing the straws and removing wax;
s3: dividing the sludge into upper layer sludge and lower layer sludge according to the result of the deep water content of the sludge in the step S1, pumping the upper layer sludge, uniformly mixing the upper layer sludge with the straw treated in the step S2, and conveying the mixture to a methane tank for fermentation through a screw pump;
s4: adding plant ash into the lower-layer sludge in the step S3 to adjust the lower-layer sludge to be weakly acidic, loosening the sludge and airing;
s5: digging out the sludge, heating for 10-15 h by adopting a steam guide pipe, and doping slag to obtain the matrix nutrient soil.
And in the step S2, removing the wax from the straws by a lime milk method, immersing the straws in the lime milk for 5-6 min, and then fishing out and draining. The lime milk can destroy the cellulose of the straws, and is more beneficial to the activity of microorganisms so as to generate more methane;
wherein, the water content of the upper layer sludge in the step S3 is more than or equal to 90 percent, the fluidity of the sludge is better, and the types and the content of the microorganisms are more.
Wherein the pH value of the sludge adjusted in the step S4 is about 4.7-5.3, and the water content of the sludge after airing is about 70%. The plant ash is added and the water content is reduced by airing, so that the sludge can be loosened, the heating effect is good, and the heating energy is saved.
In the step S5, the heating temperature is controlled to be 80-90 degrees, the heat source of the steam guide pipe is from the methane generated by the methane tank in the step S3, the distance between the steam guide pipes is 50-70 cm, the laying depth of the steam guide pipe is 40-50 cm, and the sludge can be effectively heated so as to kill microorganisms in the sludge, avoid the activity of the microorganisms and generate harmful gas.
The invention provides a method for treating river and lake sludge, which is characterized in that the agricultural polluted river and lake sludge has the characteristics of high organic matter, plant nutrient and microorganism contents, but the water contents of the upper layer and the lower layer of the river and lake sludge are different, the water content of the upper layer is more, the upper layer of the river and lake sludge has certain fluidity, the upper layer of the river and lake sludge contains more microorganisms and organic matters, straws can be proportioned for fermentation, the lower layer of the sludge is deposited with a large amount of trace elements and nutrient substances required by plants, the acidity is higher, certain pathogenic bacteria are contained, the structure is compact due to the action of water pressure, the river and lake sludge cannot be directly used as substrate nutrient soil for greening, the adding amounts of plant ash and slag can be determined by controlling the pH value of the sludge, the acidity of the sludge of the middle layer and the lower layer of the sludge can be more loose.
Case one, treating a river sludge contaminated by agriculture, according to an embodiment of the present invention, comprises the following steps:
s1, performing physical and chemical analysis on sludge, analyzing deep water content of the sludge, and determining the types of microorganisms and the content of organic matters; table 1 physicochemical analysis table of river and lake sludge
TABLE 1 physicochemical analysis chart of river and lake sludge
Note: the bacteria content is more than 100/ml, more than 50/ml to 100/ml and less than 50/ml;
s2: processing auxiliary materials, namely determining the proportion of the straws according to the types of microorganisms in the determination result in the S1, crushing the straws and removing wax; and (3) determining that the upper layer sludge with the mixture ratio of 100kg is 10kg of straws, removing wax by immersing the straws in lime milk with the mass fraction of 30% for 5-6 min, and fishing out.
S3: dividing the sludge into upper layer sludge and lower layer sludge according to the result of the deep water content of the sludge in the step S1, pumping the upper layer sludge out, uniformly mixing the upper layer sludge with the straw treated in the step S2, and then conveying the mixture to a methane tank through a screw pump for fermentation;
s4: and (4) adding plant ash into the lower-layer sludge in the step (S3) to adjust the pH value of the lower-layer sludge to 5.0, loosening the sludge, and airing the sludge until the water content is 70%.
S5: digging out the sludge treated in the step S4, heating for 10-15 h by adopting steam guide pipes, wherein the distance between the steam guide pipes is 60cm, the laying depth of the steam guide pipes is 45cm, and the heating temperature is controlled to be 80-90 degrees and then slag is doped to obtain the matrix nutrient soil.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (3)
1. A method for treating sludge in rivers and lakes, which is used for treating sludge in rivers and lakes polluted by agriculture, is characterized by comprising the following steps: the method comprises the following steps:
s1: performing physicochemical analysis and deep water content analysis on the sludge, and determining the types of microorganisms and the content of organic matters;
s2: processing auxiliary materials, namely determining the proportion of the straws according to the types of microorganisms in the determination result in the S1, crushing the straws and removing wax;
removing the waxiness of the straws by a lime milk method in the step S2, immersing the straws in lime milk for 5-6 min, and then fishing out and draining;
s3: dividing the sludge into upper-layer sludge and lower-layer sludge according to the result of the deep water content of the sludge in the step S1, pumping the upper-layer sludge, uniformly mixing the upper-layer sludge with the straw treated in the step S2, and conveying the mixture to a methane tank for fermentation through a screw pump;
s4: adding plant ash into the lower-layer sludge in the step S3 to adjust the lower-layer sludge to be weakly acidic, loosening the sludge and airing;
s5: digging out the sludge treated in the step S4, heating for 10-15 hours by adopting a steam guide pipe, controlling the heating temperature to be 80-90 ℃, enabling a heat source of the steam guide pipe to come from the methane produced by the methane tank in the step S3, enabling the distance between the steam guide pipes to be 50cm-70cm, and doping slag to obtain the matrix nutrient soil.
2. The method for treating river and lake sludge according to claim 1, wherein the laying depth of the steam conduit is 30 to 50cm.
3. The method for treating sludge in rivers and lakes according to claim 1, wherein the water content of the sludge in the upper layer in the step S3 is greater than or equal to 90%.
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| CN201910470321.0A CN110156288B (en) | 2019-05-31 | 2019-05-31 | Treatment method of river and lake sludge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910470321.0A CN110156288B (en) | 2019-05-31 | 2019-05-31 | Treatment method of river and lake sludge |
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| CN110156288A CN110156288A (en) | 2019-08-23 |
| CN110156288B true CN110156288B (en) | 2022-10-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992146A (en) * | 2014-05-04 | 2014-08-20 | 张良 | Activated sludge fertilizer |
| CN104152494A (en) * | 2014-08-20 | 2014-11-19 | 山东省农业科学院农业资源与环境研究所 | Biogas fermentation initiator and preparation method thereof |
| CN107162647A (en) * | 2017-05-05 | 2017-09-15 | 博川环境修复（北京）有限公司 | A kind of riverway sludge processing method |
| CN107601799A (en) * | 2017-11-09 | 2018-01-19 | 中建水务环保有限公司 | River bottom mud administering method on the spot |
| CN107759412A (en) * | 2017-11-17 | 2018-03-06 | 郑州大学 | A kind of biological organic fertilizer and preparation method thereof |
-
2019
- 2019-05-31 CN CN201910470321.0A patent/CN110156288B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992146A (en) * | 2014-05-04 | 2014-08-20 | 张良 | Activated sludge fertilizer |
| CN104152494A (en) * | 2014-08-20 | 2014-11-19 | 山东省农业科学院农业资源与环境研究所 | Biogas fermentation initiator and preparation method thereof |
| CN107162647A (en) * | 2017-05-05 | 2017-09-15 | 博川环境修复（北京）有限公司 | A kind of riverway sludge processing method |
| CN107601799A (en) * | 2017-11-09 | 2018-01-19 | 中建水务环保有限公司 | River bottom mud administering method on the spot |
| CN107759412A (en) * | 2017-11-17 | 2018-03-06 | 郑州大学 | A kind of biological organic fertilizer and preparation method thereof |
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Address after: 224000 21 floor, service building, 1188 Century Avenue, Yancheng City, Jiangsu. Applicant after: Yancheng Haohao Construction Engineering Co.,Ltd. Address before: 224000 21 floor, service building, 1188 Century Avenue, Yancheng City, Jiangsu. Applicant before: ZHONGYUN CONSTRUCTION SHAREHOLDING Co.,Ltd. |
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