Integrated method for high organic silt high-efficiency dehydration and nutrient soil preparation

A technology of organic matter and nutrient soil, applied in the direction of organic fertilizers, inorganic fertilizers, calcium fertilizers, etc., can solve the problems of difficult dehydration, complicated process, long cycle, etc., and achieve the effects of enhanced dehydration efficiency, rich nutrient elements, and enhanced fertility

Inactive Publication Date: 2017-06-20
JIANGSU ZHONGYI ECOLOGICAL SOIL INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an integrated method for high-efficiency dehydration of high-organic sludge and preparation of nutrient soil, which solves the technical problems of difficulty in dehydration, long cycle, complicated process and low efficiency in the production of high-fertility nutrient soil in the prior art

Method used

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  • Integrated method for high organic silt high-efficiency dehydration and nutrient soil preparation
  • Integrated method for high organic silt high-efficiency dehydration and nutrient soil preparation
  • Integrated method for high organic silt high-efficiency dehydration and nutrient soil preparation

Examples

Experimental program
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Effect test

example 1

[0046] After flocculation and sedimentation, the high water content sludge has a solid content of 20% and an organic matter content of 10%. Phosphate rock powder with a mass ratio of 8% is added, and the mud mixer is rapidly stirred for 5 minutes to mix evenly to obtain the first sludge mixture material.

[0047] Add 6% dry crushed straw and 3% furfural slag to the first sludge mixture, stir rapidly for 6 minutes, and mix evenly to obtain the second sludge mixture.

[0048] Add quicklime with a mass ratio of 3% to the second sludge mixture material, stir rapidly for 5 minutes, and mix evenly to obtain a third sludge mixture material.

[0049] The prepared third mud mixture material was added to a plate and frame filter press for dehydration treatment, the filter press time was controlled at 30 minutes, and the water content of the mud cake obtained after dehydration was 33%.

[0050] The low water content mud cake obtained by pressure filtration is mixed with humus with a mass...

example 2

[0054] After flocculation and sedimentation, the high water content sludge has a solid content of 23% and an organic matter content of 12%. Phosphate rock powder with a mass ratio of 9% is added, and the mud mixer is stirred rapidly for 5 minutes to mix evenly to obtain the first sludge mixture material.

[0055] Add 7% dry and pulverized straw and 2% furfural slag to the first sludge mixture, stir rapidly for 7 minutes, and mix evenly to obtain the second sludge mixture.

[0056] Add quicklime with a mass ratio of 2% to the second sludge mixture material, stir rapidly for 5 minutes, and mix evenly to obtain a third sludge mixture material.

[0057] The prepared third mud mixture material was added to a plate and frame filter press for dehydration treatment, the filter press time was controlled at 32 minutes, and the water content of the mud cake obtained after dehydration was 31%.

[0058] The low water content mud cake obtained by pressure filtration is mixed with humus with...

example 3

[0062] After flocculation and sedimentation, the high water content sludge has a solid content of 28% and an organic matter content of 11%. Phosphate rock powder with a mass ratio of 10% is added, and the mud mixer is stirred rapidly for 5 minutes to mix evenly to obtain the first sludge mixture material.

[0063] Add 8% dry crushed straw and 2% furfural slag in mass ratio to the first sludge mixture material, stir rapidly for 8 minutes, and mix evenly to obtain the second sludge mixture material.

[0064] Add quicklime with a mass ratio of 1% to the second sludge mixture material, stir rapidly for 5 minutes, and mix evenly to obtain a third sludge mixture material.

[0065] The prepared third mud mixture material is added to a plate and frame filter press for dehydration treatment, the filter press time is controlled at 35 minutes, and the water content of the mud cake obtained after dehydration is 30%.

[0066] The low water content mud cake obtained by pressure filtration i...

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Abstract

Belonging to the technical field of environmental geotechnical engineering, the invention discloses an integrated method for high organic silt high-efficiency dehydration and nutrient soil preparation. The method includes: adding 8%-10% by mass of ground phosphate rock into silt subjected to flocculating setting, and performing stirring to obtain a first silt mixture; adding 6%-8% by mass of dried crushed straw and 2%-4% of dried furfural residue into the first silt mixture, and performing stirring to obtain a second silt mixture; adding 1%-3% by mass of quick lime into the second silt mixture, and performing stirring to obtain a third silt mixture; subjecting the third silt mixture to dehydration treatment so as to obtain a mud cake; and mixing the mud cake with humus and kitchen garbage, and then performing crushing. The method provided by the invention synthesizes the integrated processing steps of high organic silt high-efficiency dehydration and nutrient soil preparation enhances the dehydration efficiency and is based on organic silt nutrient soil fertility, and the obtained nutrient soil has nutrient content close to the national organic fertilizer standard.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to an integrated method for high-efficiency dehydration of high-organic sludge and preparation of nutrient soil. Background technique [0002] In order to improve the water quality of lakes and ensure the normal flood discharge capacity of rivers, my country carries out large-scale river and lake dredging projects every year, resulting in a large amount of engineering silt. The dehydration and disposal of these silts has always been a big engineering problem. At present, the vast majority of dredged silt in China is directly discarded in landfill or low-lying areas after dehydration. position" situation. [0003] Due to the impact of domestic wastewater, river sludge generally has a high organic matter content, and dehydration is difficult. Under normal filter press conditions, the water content of the mud cake produced is above 40%, and it is difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B17/00C05G3/00C05G3/80C05D3/02C05F5/006C05F7/00C05F9/00C05F11/00C05F11/02
Inventor 陈亿军刘磊孔赟薛强奉向东
Owner JIANGSU ZHONGYI ECOLOGICAL SOIL INST
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