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Soil deep barrier repair technology and application thereof

A soil and deep layer technology, applied in the field of soil remediation, can solve the problems of heavy soil workload and cumbersome formation of barrier layers in saline-alkali land, and achieve the effects of simple operation, removal of barrier effect, and low cost

Pending Publication Date: 2022-04-05
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the formation of the saline-alkali barrier layer is too cumbersome, and the workload of excavating the surface soil of the saline-alkali soil is large, so as to provide a deep soil barrier restoration technology and its application

Method used

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  • Soil deep barrier repair technology and application thereof
  • Soil deep barrier repair technology and application thereof
  • Soil deep barrier repair technology and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment provides a deep soil barrier restoration technology, comprising the following steps,

[0047] 1. Prepare the bacteria solution: based on the total volume of the bacteria solution, mix with water at the dosage of Bacillus Pasteurella bacteria powder 20g / L, ammonium sulfate 15g / L, and urea 10g / L, and use 0.1mol / L dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0048] 2. Prepare calcium ion solution: prepare calcium chloride aqueous solution at a concentration of 0.05mol / L;

Embodiment 2

[0051] This embodiment provides a deep soil barrier restoration technology, comprising the following steps,

[0052]1. Prepare bacterial solution: based on the total volume of the bacterial solution, mix it with water at the dosage of 20g / L of ordinary Desulfovibrio bacterial powder, 15g / L of ammonium sulfate, and 10g / L of urea, and use 0.1mol / L of dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0053] 2. Prepare calcium ion solution: prepare calcium chloride solution at a concentration of 0.05mol / L;

[0054] 3. On the soil to be repaired, according to the depth of 10m, 0.75m 3 Bacterial liquid and 0.75m 3 The calcium ion solution was laterally injected into it, the distance between the injection positions was 1.5m, and a barrier layer was formed after 28d.

Embodiment 3

[0056] This embodiment provides a deep soil barrier restoration technology, comprising the following steps,

[0057] 1. Prepare the bacterial solution: based on the total volume of the bacterial solution, mix with water at the dosage of Thiobacillus denitrificans bacteria powder 20g / L, ammonium sulfate 15g / L, and urea 10g / L, and use 0.1mol / L dilute Sulfuric acid and dilute ammonia water adjusted the pH of the culture medium to 7.5, and fermented and cultured at 35°C for 24 hours to obtain a carbonate mineralizing bacteria liquid;

[0058] 2. Prepare calcium ion solution: prepare calcium chloride solution at a concentration of 0.05mol / L;

[0059] 3. On the soil to be repaired, according to the depth of 10m, 0.75m 3 Bacterial liquid and 0.75m 3 The calcium ion solution was laterally injected into it, the distance between the injection positions was 1.5m, and a barrier layer was formed after 28d.

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Abstract

The invention belongs to the technical field of soil remediation, and particularly relates to a soil deep barrier remediation technology and application thereof. The invention provides a soil deep barrier repair technology which comprises the following steps: injecting a carbonate mineralizing bacteria solution and a calcium ion solution into soil to be repaired according to a preset depth to form a barrier layer. According to the method, the carbonate mineralizing bacteria solution and the calcium ion solution are respectively and horizontally injected into the appointed deep soil, so that calcium carbonate is synthesized by microorganisms in the deep soil, a compact calcium carbonate interlayer with an extremely low permeability coefficient is formed, high-salt underground water at the lower layer is effectively prevented from moving upwards, and the low-salt state of surface soil is further maintained. The transverse barrier layer can be built only by injecting the liquid material at the specified depth of the soil, excavation is not needed, the cost is lower, operation is simpler and more convenient, and surface soil can be prevented from salinization for a long time after barrier.

Description

technical field [0001] The invention belongs to the technical field of soil repair, and in particular relates to a deep soil barrier repair technology and its application. Background technique [0002] Saline-alkali land refers to the general designation of various types of soils that contain high concentrations of soluble salt ions and have adversely affected the physical, chemical, and biological characteristics of the soil and plant growth. Saline-alkali land is one of the most important low-yielding farmland types, and improving its cultivated land quality and productivity level is of great significance to improving the quality of cultivated land. At the same time, the control and development of saline-alkali land can effectively improve cultivated land resources and expand the space for agricultural development. [0003] At present, the improvement and control of saline-alkali land mainly includes four methods: physical, chemical, water conservancy, and biological. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B77/00C09K17/40
Inventor 王祺桂毅李嘉晨刘亚茹郭丽莉熊静李书鹏杨旭魏宁
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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