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Alkaline river sludge-based garden greening soil and preparation method thereof

A technology for river silt and landscaping, which is applied in botany equipment and methods, planting substrates, and organic fertilizer preparation, etc. It can solve the problems of high pH of dehydrated silt, high drying cost, and landscaping soil that cannot meet the requirements of green planting soil indicators, etc. problems, to achieve the effect of reducing disposal costs, promoting solidification and dispersion, and reducing the amount of solid waste landfill and outbound treatment

Pending Publication Date: 2021-07-23
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an alkaline river silt-based landscaping green plant for the problems of high cost of deep drying of silt, high pH of dehydrated silt, and failure to meet the requirements of landscaping soil when directly used as landscaping soil. It can co-process a large amount of river sludge and furfural slag, and at the same time solidify the heavy metals and salt ions in the sludge. The green planting soil obtained meets the main control index technical requirements of landscaping soil, and the preparation method involved is simple and low in cost, which is of great importance. economic and environmental benefits

Method used

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  • Alkaline river sludge-based garden greening soil and preparation method thereof
  • Alkaline river sludge-based garden greening soil and preparation method thereof
  • Alkaline river sludge-based garden greening soil and preparation method thereof

Examples

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Effect test

Embodiment 1

[0035] An alkaline river silt-based landscaping soil, the preparation method of which comprises the steps of:

[0036] 1) Weigh each raw material according to the ratio, each raw material and its dosage are: 800 kg of alkaline river sludge, 20 kg of furfural residue, 115 kg of straw powder, 5 kg of fermented and decomposed straw powder residue, and 60 kg of chitosan;

[0037] 2) Place the weighed alkaline river sludge in a planetary disc mixer, add furfural slag, stir and mix for 30 seconds, then add straw powder, adjust the C / N ratio of the obtained mixed material to 25.6, and stir and mix for 30 seconds;

[0038] 3) Add chitosan and decomposed straw powder to the mixed material obtained in step 2); stir and mix for 30 seconds, place it in a well-ventilated outdoor at a temperature of 15-30°C, carry out composting and fermentation for 10 days, turn the pile once every 4 days, and collect The samples were tested for temperature, pH value and electrical conductivity, and the ri...

Embodiment 2

[0040]An alkaline river silt-based landscaping soil, the preparation method of which comprises the steps of:

[0041] 1) Weigh each raw material according to the proportion, each raw material and its dosage are: 700 kg of alkaline river sludge, 40 kg of furfural residue, 200 kg of straw powder, 10 kg of fermented and decomposed straw powder residue, and 50 kg of chitosan;

[0042] 2) Place the weighed alkaline river sludge in a planetary disc mixer, add furfural slag, stir and mix for 30 seconds, then add straw powder, adjust the C / N ratio of the obtained mixed material to 26.4, and stir and mix for 30 seconds;

[0043] 3) Add chitosan and decomposed straw powder to the mixed material obtained in step 2); stir and mix for 30 seconds, place it under well-ventilated natural conditions (temperature is 15-30° C.) for composting and fermentation for 10 days, and turn the pile once every 4 days. Samples were collected for temperature, pH and conductivity testing, and the river silt-...

Embodiment 3

[0045] An alkaline river silt-based landscaping soil, the preparation method of which comprises the steps of:

[0046] 1) Weigh each raw material according to the proportion, each raw material and its dosage are: 650 kg of alkaline river sludge, 60 kg of furfural residue, 190 kg of straw powder, 20 kg of fermented and decomposed straw powder residue, and 80 kg of chitosan;

[0047] 2) Place the weighed alkaline river silt in a planetary disc mixer, add furfural slag, stir and mix for 30 seconds, then add straw powder, adjust the C / N ratio of the obtained mixed material to 26.1, and stir and mix for 30 seconds;

[0048] 3) Add chitosan and decomposed straw powder to the mixed material obtained in step 2); stir and mix for 30 seconds, place it under well-ventilated natural conditions (temperature is 15-30° C.) for composting and fermentation for 10 days, and turn the pile once every 4 days. Samples were collected for temperature, pH and conductivity testing, and the river silt-b...

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Abstract

The invention discloses river sludge-based garden greening soil, which comprises the following components in percentage by mass: 60-85% of alkaline river sludge, 2-10% of furfural residues, 10-30% of straw powder, 0.5-2% of fermented and decomposed straw powder residues and 5-8% of chitosan. The furfural residues, the straw powder, the fermented and decomposed straw powder residues and the chitosan are introduced into the alkaline river sludge, so that modification of the river sludge and synergistic absorption of agricultural solid wastes such as the furfural residues and the straw powder can be synchronously realized, heavy metals and salt ions in the sludge can be solidified, the obtained greening planting soil meets the technical requirements of main control indexes of landscaping soil, and the related preparation method is simple and relatively low in cost, and has important economic and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of landscaping and solid waste comprehensive utilization, and in particular relates to an alkaline river mud-based garden green planting soil and a preparation method thereof. Background technique [0002] River dredging leads to a large amount of silt accumulation, occupying a large amount of land and easily causing environmental pollution. my country's dredging sludge disposal technology is still dominated by landfill and composting. With the development of ecological civilization construction, harmless treatment and resource utilization of sludge will be the inevitable choice of sludge disposal technology in the future. The landscaping green planting soil prepared from silt resources is an effective means to absorb the accumulated silt in a large amount. In the process of comprehensive improvement of the water environment, a part of the water body silt has the characteristics of no heavy metal pollution,...

Claims

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Application Information

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IPC IPC(8): A01G24/10A01G24/22A01G24/30A01G24/00C05G3/80
CPCA01G24/10A01G24/22A01G24/30A01G24/00C05G3/80C05F5/006C05F7/00C05F11/00C05F17/20C05F17/80
Inventor 黄文海闵红平石稳民彭冠平聂怀军江东邱震寰秦雄陈安明何媛王民珉张文赵皇
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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