CN111253177A - Method for preparing compound organic fertilizer by using river sludge - Google Patents
Method for preparing compound organic fertilizer by using river sludge Download PDFInfo
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- CN111253177A CN111253177A CN201911390593.6A CN201911390593A CN111253177A CN 111253177 A CN111253177 A CN 111253177A CN 201911390593 A CN201911390593 A CN 201911390593A CN 111253177 A CN111253177 A CN 111253177A
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- river sludge
- river
- sludge
- organic fertilizer
- heavy metals
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Health & Medical Sciences (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Mechanical Engineering (AREA)
- Fertilizers (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for preparing a compound organic fertilizer by using river sludge, which comprises the following steps: s1, a step of acquiring river sludge; s2 is used for pretreating river sludge; s3 is used for carrying out dehydration treatment on the river sludge; s4, removing heavy metals in the river sludge; s5 is used for fermenting the river sludge to form organic fertilizer. The method for preparing the compound organic fertilizer by using the river sludge removes the heavy metals in the river sludge, and then performs fermentation treatment, thereby forming the organic fertilizer, changing the river sludge into valuables, and having low production cost and high sludge utilization rate.
Description
Technical Field
The invention relates to the technical field of environmental engineering, in particular to a method for preparing a compound organic fertilizer by using river sludge.
Background
In the prior art, a large amount of sludge exists in a polluted river, and the river sludge is treated in the prior art, and the sludge is only salvaged or sucked in a twisting way, so that the river sludge is cleaned; the cleaned sludge is generally dried and discarded. If a method is adopted, the salvaged or the winched sludge is treated to form the organic fertilizer rich in organic nutrients, so that the sludge can be recycled, the manufacturing cost is low, and the waste can be changed into valuable.
Disclosure of Invention
The invention aims to provide a method for preparing a compound organic fertilizer by using river sludge.
The method for preparing the compound organic fertilizer by using the river sludge provided by the invention comprises the following steps: s1, a step of acquiring river sludge; s2 is used for pretreating river sludge; s3 is used for carrying out dehydration treatment on the river sludge; s4, removing heavy metals in the river sludge; s5 is used for fermenting the river sludge to form organic fertilizer.
The step of S1 for obtaining river sludge may be: s111, carrying out underwater detection net-pulling type processing on the river channel; and S112, fishing the river bottom sludge by using a river sludge fishing ship. The step of S1 for obtaining river sludge may further be: s121, carrying out underwater detection net-pulling type processing on the river channel; s122, utilizing floating body type cutter suction dredging equipment to cutter suction the river sediment, thereby obtaining the river sludge. The S2 is used for preprocessing the river sludge and comprises the following steps: s21 precipitation treatment; a step for settling the river sludge by standing the river sludge in a settling tank for 9 hours; s22, sending the river sludge settled at the bottom of the sedimentation tank into an anaerobic regulation tank for anaerobic reaction so as to carry out anaerobic regulation; s23, sending the river sludge subjected to anaerobic regulation into a biological reaction filter for biological reaction treatment; s24, sending the river sludge after the biological reaction treatment into a filter tank for filtration treatment. And the step of S3 for dehydrating the river sludge is to send the river sludge into a water washing filter press for water washing and filter pressing treatment so as to obtain a mud cake with the water content of 15-45%. The S4 step for removing heavy metals in river sludge comprises the following steps: planting plants for absorbing heavy metals on the river sludge; or a fine pipe network is arranged in the river sludge and distributed in the whole sludge, and the solution for dissolving the heavy metals is sent to each part of the river sludge through the pipe network; or in the river sludge breeding, organisms capable of absorbing heavy metals are cultured; or pumping the river sludge into the acidic wastewater to separate heavy metals; or continuously spraying the river sludge by using an acidic solution so as to dissolve the heavy metals by using the acidic solution; or the continuous cleaning solid-liquid separation filter is used for cleaning the river sludge. The S5 is used for fermenting the river sludge to form an organic fertilizer, and comprises the following steps: s51, diluting and proportioning the biological fermentation inoculum and the solid auxiliary materials according to the proportion of 1:50, and uniformly mixing to form a diluted fermentation agent; the solid auxiliary material is sawdust or straw; s52, fully and uniformly mixing the diluted leavening agent with the river sludge from which the heavy metals are removed; s53, standing the river sludge mixed with the diluted leaven in a fermentation tank, turning over the sludge for 1 time every 24 hours to keep the temperature at 65 ℃, and moving the river sludge out of the fermentation tank for airing after 10 days to form the compound organic fertilizer.
The method for preparing the compound organic fertilizer by using the river sludge removes the heavy metals in the river sludge, and then performs fermentation treatment, thereby forming the organic fertilizer, changing the river sludge into valuables, and having low production cost and high sludge utilization rate.
Drawings
FIG. 1 is a schematic flow chart of a method for producing a compound organic fertilizer by using river sludge according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the steps of pre-treating river sludge according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a fermentation treatment step of river sludge according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, this embodiment provides a method for producing a compound organic fertilizer by using river sludge, including the following steps:
s1, a step of acquiring river sludge;
s2 is used for pretreating river sludge;
s3 is used for carrying out dehydration treatment on the river sludge;
s4, removing heavy metals in the river sludge;
s5 is used for fermenting the river sludge to form organic fertilizer.
The technical personnel in the field can understand that the method for manufacturing the compound organic fertilizer by using the river sludge provided by the embodiment removes the heavy metals in the river sludge, and then performs fermentation treatment, so that the organic fertilizer is formed, the river sludge is changed into things of value, the production cost is low, and the sludge utilization rate is high.
The step of S1 for obtaining river sludge includes:
s111, carrying out underwater detection net-pulling type processing on the river channel; the technical personnel in the field can understand that the underwater detection net-pulling type treatment is carried out on the river before the river garbage is obtained, a large amount of garbage waste and large-volume harmful substances can be cleaned firstly, so that the river sludge with high utilization rate can be obtained at the later stage;
and S112, fishing the river bottom sludge by using a river sludge fishing ship.
The step of S1 for obtaining river sludge may further include:
s121, carrying out underwater detection net-pulling type processing on the river channel; the technical personnel in the field can understand that the underwater detection net-pulling type treatment is carried out on the river before the river garbage is obtained, a large amount of garbage waste and large-volume harmful substances can be cleaned firstly, so that the river sludge with high utilization rate can be obtained at the later stage;
s122, utilizing floating body type cutter suction dredging equipment to cutter suction the river sediment, thereby obtaining the river sludge.
As shown in fig. 2, the S2 is a step for pretreating river sludge, including:
s21, standing the river sludge in a sedimentation tank for 9 hours so as to carry out sedimentation treatment on the river sludge;
s22, sending the river sludge settled at the bottom of the sedimentation tank into an anaerobic regulation tank for anaerobic reaction so as to carry out anaerobic regulation;
s23, sending the river sludge subjected to anaerobic regulation into a biological reaction filter for biological reaction treatment;
s24, sending the river sludge after the biological reaction treatment into a filter tank for filtration treatment.
And the step of S3 for dehydrating the river sludge is to send the river sludge into a water washing filter press for water washing and filter pressing treatment so as to obtain a mud cake with the water content of 15-45%.
The step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s41 planting plants for absorbing heavy metals on the river sludge;
the step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s42 fine pipe networks are arranged in the river sludge and distributed in the whole sludge, and the solution for dissolving heavy metals is sent to all parts of the river sludge through the pipe networks.
The step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s43 breeding heavy metal absorbing organisms such as earthworms in river sludge.
The step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s44, pumping the river sludge into the acidic wastewater to separate heavy metals;
the step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s45, continuously spraying the river sludge with an acidic solution, so that the heavy metals are dissolved by the acidic solution;
the step of removing heavy metals in the river sludge by using the S4 can comprise the following steps:
s46 the river sludge is cleaned by the continuous cleaning solid-liquid separation filter.
As shown in fig. 3, the step S5 of fermenting the river sludge to form organic fertilizer includes:
s51, diluting and proportioning the biological fermentation inoculum and the solid auxiliary materials according to the proportion of 1:50, and uniformly mixing to form a diluted fermentation agent; the solid auxiliary material can be sawdust or straw;
s52, fully and uniformly mixing the diluted leavening agent with the river sludge from which the heavy metals are removed;
s53, standing the river sludge mixed with the diluted leaven in a fermentation tank, turning over the sludge for 1 time every 24 hours to keep the temperature at 65 ℃, and moving the river sludge out of the fermentation tank for airing after 10 days to form the compound organic fertilizer.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (12)
1. A method for preparing a compound organic fertilizer by using river sludge is characterized by comprising the following steps:
s1, a step of acquiring river sludge;
s2 is used for pretreating river sludge;
s3 is used for carrying out dehydration treatment on the river sludge;
s4, removing heavy metals in the river sludge;
s5 is used for fermenting the river sludge to form organic fertilizer.
2. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 1, wherein the step of S1 for obtaining the river sludge comprises:
s111, carrying out underwater detection net-pulling type processing on the river channel;
and S112, fishing the river bottom sludge by using a river sludge fishing ship.
3. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 1, wherein the step of S1 for obtaining the river sludge comprises:
s121, carrying out underwater detection net-pulling type processing on the river channel;
s122, utilizing floating body type cutter suction dredging equipment to cutter suction the river sediment, thereby obtaining the river sludge.
4. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 2 or 3, wherein the step of S2 for pretreating the river sludge comprises the following steps:
s21 precipitation treatment; a step for settling the river sludge by standing the river sludge in a settling tank for 9 hours;
s22, sending the river sludge settled at the bottom of the sedimentation tank into an anaerobic regulation tank for anaerobic reaction so as to carry out anaerobic regulation;
s23, sending the river sludge subjected to anaerobic regulation into a biological reaction filter for biological reaction treatment;
s24, sending the river sludge after the biological reaction treatment into a filter tank for filtration treatment.
5. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 4, wherein the step S3 for dehydrating the river sludge is to send the river sludge into a water washing filter press to carry out water washing filter press treatment so as to obtain a mud cake with water content of between 15% and 45%.
6. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: plants for absorbing heavy metals are planted on the river sludge.
7. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: fine pipe networks are arranged in the river sludge and distributed in the whole sludge, and the solution for dissolving the heavy metals is sent to all parts of the river sludge through the pipe networks.
8. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: the organisms capable of absorbing heavy metals are cultured in sludge in a river channel.
9. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: pumping the river sludge into the acidic wastewater to separate heavy metals.
10. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: and continuously spraying the river sludge by using an acidic solution, so that the heavy metal is dissolved by using the acidic solution.
11. The method for preparing the compound organic fertilizer by using the river sludge as claimed in claim 5, wherein the step of S4 for removing the heavy metals in the river sludge comprises the steps of: and cleaning the river sludge by using a continuous cleaning solid-liquid separation filter.
12. The method for preparing the compound organic fertilizer by using the river sludge according to claim 5, wherein the step of S5 for fermenting the river sludge to form the organic fertilizer comprises the following steps:
s51, diluting and proportioning the biological fermentation inoculum and the solid auxiliary materials according to the proportion of 1:50, and uniformly mixing to form a diluted fermentation agent; the solid auxiliary material is sawdust or straw;
s52, fully and uniformly mixing the diluted leavening agent with the river sludge from which the heavy metals are removed;
s53, standing the river sludge mixed with the diluted leaven in a fermentation tank, turning over the sludge for 1 time every 24 hours to keep the temperature at 65 ℃, and moving the river sludge out of the fermentation tank for airing after 10 days to form the compound organic fertilizer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911390593.6A CN111253177A (en) | 2019-12-30 | 2019-12-30 | Method for preparing compound organic fertilizer by using river sludge |
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| CN201911390593.6A CN111253177A (en) | 2019-12-30 | 2019-12-30 | Method for preparing compound organic fertilizer by using river sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979357A (en) * | 2021-02-26 | 2021-06-18 | 华东师范大学重庆研究院 | Method for adsorbing and removing heavy metals in green organic fertilizer |
| CN113831191A (en) * | 2021-11-02 | 2021-12-24 | 长江河湖建设有限公司 | Composite organic fertilizer prepared by recycling river sludge and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112979357A (en) * | 2021-02-26 | 2021-06-18 | 华东师范大学重庆研究院 | Method for adsorbing and removing heavy metals in green organic fertilizer |
| CN113831191A (en) * | 2021-11-02 | 2021-12-24 | 长江河湖建设有限公司 | Composite organic fertilizer prepared by recycling river sludge and preparation method thereof |
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Application publication date: 20200609 |