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Formula for repairing river and lake sludge and method for preparing green plant soil by using formula

A sludge and formula technology, applied in the field of soil treatment, can solve the problems of limited immobilization of harmful heavy metals and single effect of mud cake resource utilization, and achieve the effect of improving the disposal rate

Inactive Publication Date: 2020-09-01
ROAD ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the immobilization effect of the solidified material on the heavy metal harmful substances in the sludge is limited and the resource utilization effect of the mud cake is single

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of method utilizing river and lake silt to prepare green planting soil, comprises the following steps:

[0019] Remove the impurities in the river and lake silt, measure its water content, obtain the dry basis mass of the river and lake silt, calculate the dry basis mass in the river and lake silt, stir and mix the river and lake silt with the formula at a mass ratio of 1:0.1, The formula is added into a twin-shaft mixer through a screw meter and stirred and mixed with river and lake silt;

[0020] Dehydration and consolidation, dehydration and consolidation are carried out with a plate and frame filter press, and the dehydration rate is 40m 3 / h to get a mud cake with a pH value of 7.0 to 9.0;

[0021] The mud cake is stirred and crushed by a double-shaft mixer, and mixed with nutrients at a mass ratio of 1:0.02, and nutrients are added to the mud cake to obtain green plant soil.

[0022] Wherein, the mass fraction ratio of each component of the formula is: 15...

Embodiment 2

[0024] A kind of method utilizing river and lake silt to prepare green planting soil, comprises the following steps:

[0025] Remove the impurities in the river and lake silt, measure its water content, and obtain the dry basis mass of the river and lake silt, calculate the dry basis mass in the river and lake silt, mix the river and lake silt with the formula according to the mass ratio of 1:0.15, The formula is added into a twin-shaft mixer through a screw meter and stirred and mixed with river and lake silt;

[0026] Dehydration and consolidation, dehydration and consolidation are carried out with a plate and frame filter press, and the dehydration rate is 40m 3 / h to get a mud cake with a pH value of 7.0 to 9.0;

[0027] The mud cake is stirred and crushed by a double-shaft mixer, and mixed with nutrients at a mass ratio of 1:0.03, and nutrients are added to the mud cake to obtain green plant soil.

[0028] Wherein, the mass fraction ratio of each component of the formul...

Embodiment 3

[0030] A kind of method utilizing river and lake silt to prepare green planting soil, comprises the following steps:

[0031] Remove the impurities in the river and lake silt, measure its water content, obtain the dry basis mass of the river and lake silt, calculate the dry basis mass in the river and lake silt, mix the river and lake silt with the formula according to the mass ratio of 1:0.12, The formula is added into a twin-shaft mixer through a screw meter and stirred and mixed with river and lake silt;

[0032] Dehydration and consolidation, dehydration and consolidation are carried out with a plate and frame filter press, and the dehydration rate is 40m 3 / h to get a mud cake with a pH value of 7.0 to 9.0;

[0033] The mud cake is stirred and crushed by a double-shaft mixer device, and mixed with nutrients at a mass ratio of 1:0.01, and nutrients are added to the mud cake to obtain green plant soil.

[0034] Wherein, the mass fraction ratio of each component of the for...

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PUM

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Abstract

The invention discloses a formula for removing heavy metals in river and lake sludge. The formula comprises the following components in percentage by mass: 15.5 to 25 percent of calcareous material; 0to 11 percent of siliceous material; 38 to 40 percent of sulfate; 5 to 10 percent of gypsum; 1 to 4 percent of carbonate; 16.3 to 26 percent of hydroxide; 5 to 15.2 percent of humic acid; 4.5 to 10 percent of sulfite; and 3.8 to 8.6 percent of chitosan. The invention further provides a method for preparing green plant soil from river and lake sludge. With the formula and the method adopted, the heavy metals in the river and lake sludge can be effectively removed.

Description

technical field [0001] The invention relates to the technical field of soil treatment. More specifically, the invention relates to a formula for repairing river and lake silt and a method for preparing green plant soil using the formula. Background technique [0002] Sludge treatment is the process of treating, solidifying, dehydrating, stabilizing, drying or incinerating sludge. In the prior art, solidification materials are usually used to treat river and lake sludge. The solidification materials can fix harmful substances (heavy metal ions) in the sludge, and can remove harmful bacteria, BOD, COD, phosphorus and other components that pollute water quality in the sludge. The treated mud cake is mainly disposed of by landfill. However, the immobilization effect of the solidified material on the heavy metal harmful substances in the sludge is limited and the resource utilization effect of the mud cake is single. Contents of the invention [0003] It is an object of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/122C02F11/00A01G24/10A01G24/20C02F101/20
CPCC02F11/122C02F11/00C02F11/008A01G24/10A01G24/20C02F2103/007C02F2101/20
Inventor 邹迪季光明胡芳程润喜周欢李天映邓龙余康明
Owner ROAD ENVIRONMENT TECH