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Method for preparing organic fertilizer by using river course silt, and slow-release organic fertilizer

A technology of river silt and organic fertilizer, which is applied in the direction of organic fertilizer, organic fertilizer preparation, inorganic fertilizer, etc., can solve the problems of extended construction period, increased management cost, and unsuitable texture for the production of organic fertilizer, and achieves wide application fields and low production cost. low effect

Inactive Publication Date: 2019-09-06
HAIWEI ENG CONSTR CO LTD OF FIRSTHIGHWAY ENG CO LTD OF CCCC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there is no effective construction solution for the commonly used river dredging treatment. Most of the excavated silt is discarded or stored in a storage yard, which not only occupies fish ponds and cultivated land, pollutes the ocean, endangers the ecological environment, and is difficult to develop and utilize.
In addition, because the foundation is very weak, the measures of digging and drying after excavation greatly prolong the construction period, increase the management cost, and are greatly affected by weather factors.
[0003] Slow-release organic fertilizer is a kind of fertilizer that can continuously supply nutrients to plants. At present, the process of preparing slow-release organic fertilizer is complicated, and there is no process for preparing slow-release organic fertilizer for river silt.
The amount of river silt to be treated is large, and its texture is not suitable for the production of organic fertilizer as the main material alone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a method for preparing organic fertilizer from river silt, which includes the following steps:

[0043] First, the silt is excavated in the river. After preliminary screening, the silt from which impurities such as gravel are removed is collected and transported back to the treatment plant. Highly active calcium oxide (calcium oxide content is about 90%) is added, and the amount added is the quality of the silt. 0.1%, stir well and let stand for 30h.

[0044] Secondly, after preliminary draining, the general water content of the sludge is controlled to be about 75%-80%, and organic fertilizer starter is added to the sludge, and the fermenting bacteria are evenly mixed with the sludge through the throwing and turning machine, and the compound starter is added The amount is about 0.1% of the sludge mass. Stacked and fermented in summer for 5 days (temperature between 15-40℃), when the temperature reaches about 65℃, the stack will be turned and the tem...

Embodiment 2

[0047] This embodiment provides a method for preparing organic fertilizer from river silt, which includes the following steps:

[0048] First, the silt is excavated in the river. After preliminary screening, the silt from which impurities such as gravel are removed is collected and transported back to the treatment plant. Highly active calcium oxide (calcium oxide content is about 90%) is added, and the amount added is the quality of the silt. 0.5%, stir well and let stand for 20h.

[0049] Secondly, after preliminary draining, the general water content of the sludge is controlled to be about 70%-80%, and organic fertilizer starter is added to the sludge, and the fermentation bacteria are evenly mixed with the sludge through the throwing and turning machine, and the compound starter is added The amount is about 0.3% of the sludge mass. Stacked and fermented in summer for 7 days (temperature between 15-35℃), when the temperature reaches about 70℃, the stack will be turned and the t...

Embodiment 3

[0052] This embodiment provides a method for preparing organic fertilizer from river silt, which includes the following steps:

[0053] First, the silt is excavated in the river. After preliminary screening, the silt from which impurities such as gravel are removed is collected and transported back to the treatment plant. Highly active calcium oxide (calcium oxide content is about 90%) is added, and the amount added is the quality of the silt. 0.3%, stir well and let stand for 25h.

[0054] Secondly, after preliminary draining, the general water content of the sludge is controlled to be about 70%-80%, and organic fertilizer starter is added to the sludge, and the fermentation bacteria are evenly mixed with the sludge through the throwing and turning machine, and the compound starter is added The amount is about 0.1% of the sludge mass. Stacked and fermented in winter for 12 days (temperature between 0-15℃), when the temperature reaches about 65℃, turn over and cool down.

[0055] F...

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Abstract

The invention discloses a method for preparing an organic fertilizer by using river course silt, and a slow-release organic fertilizer, and relates to the technical field of silt treatment. The methodcomprises: sterilizing with a strong alkali, and fermenting, wherein preferably the strong alkali selects calcium oxide, and the calcium oxide accounts for 0.1-0.5% of the mass of silt. According tothe present invention, with the method, the organic fertilizer can be produced by using the single river course silt as the raw material without the adding of other main raw materials, and more importantly the slow-release organic fertilizer can be prepared, wherein the production cost of the organic fertilizer is low, the nutrients can meet the requirements, and the application is wide.

Description

Technical field [0001] The invention relates to the technical field of sludge treatment, and particularly relates to a method for preparing organic fertilizer from river sludge and a slow-release organic fertilizer. Background technique [0002] At present, the commonly used river dredging treatment has no effective construction solution. Most of the excavated silt is discarded or stored in a storage yard, which not only takes up fish ponds and arable land, pollutes the ocean, harms the ecological environment, and is difficult to re-develop. In addition, due to the very weak foundation foundation, the measures of digging and drying after excavation have greatly extended the construction period, increased management costs, and are greatly affected by weather factors. [0003] Slow-release organic fertilizer is a fertilizer that can continuously supply plant nutrients. At present, the process for preparing slow-release organic fertilizer is complicated, and there is no process for pr...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05F17/00
CPCC05C5/02C05D3/02C05F17/00C05F7/00C05F11/08C05C9/00Y02W30/40
Inventor 刘科刘继先尉洪利孙亚刚黄金梅
Owner HAIWEI ENG CONSTR CO LTD OF FIRSTHIGHWAY ENG CO LTD OF CCCC