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In-situ renovation method for biomass strengthen salt-alkali contaminated soil

A technology for in-situ restoration of contaminated soil, applied in the field of environmental restoration, can solve problems such as soil compaction degradation, aggravation of pollution, loss, etc., and achieve the effects of improving fertility, easy availability of raw materials, and improving aggregate structure

Inactive Publication Date: 2008-02-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In polluted soil, the humus of the soil is lost to a certain extent, which makes the soil compacted and degraded, further aggravating the pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The oil-saline-alkali-contaminated soil in the examples is located in Zhongyuan Oilfield, Puyang, Henan, with an area of ​​11 mu. Trials were carried out in 2006. Puyang is located in the north of Henan Province, with an average annual precipitation of 500mm-600mm, which belongs to the relatively arid area of ​​Henan Province. In the examples, the salt content in the polluted soil is 4 to 10 times that of the normal cultivated land, the soil salinization of the test site is serious, and the pH reaches 9.5 in some areas. Embodiment implementation steps are as follows:

[0020] 1) Build a cofferdam with a height of about 30cm around the site to prevent the discharge of the washing brine and prevent secondary pollution to the normal cultivated land;

[0021] 2) Before mechanical plowing, add biomass degrading bacteria to waste straw and other biomass in agricultural production, wherein the bacteria is Pseudomonas aeruginosa, and the fungus is Phanerochaete chrysosporium;...

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PUM

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Abstract

The invention discloses a home position restoring method of biological reinforced alkaline polluted soil in the environmental restoring technique, which is characterized by the following: adding biological degradation bacteria in the alcaline polluted soil; using mechanic digging method to construct loose biological layer in the salt immersing course; blocking capillary phenomenon to avoid salt return phenomenon; improving the efficiency of water immersed salt; modifying the crumb structure and fertility of alcaline soil; restoring the planting ability of the soil with widely extending prospect in the pollution harnessing course.

Description

technical field [0001] The invention belongs to the technology of environmental restoration, in particular to an in-situ restoration method of biomass-enhanced saline-alkali polluted soil. Background technique [0002] Saline-alkali land pollution is one of the common types of soil pollution. At present, there are about 45 million mu of saline-alkali land in China. Due to the poor utilization of cultivated land, the salinization of cultivated land in our country is very serious. At present, the treatment of saline-alkali land mainly includes washing salt with water, covering to reduce evaporation, and bioremediation of saline-alkali soil. Water leaching salt is one of the commonly used saline-alkali land treatment methods, but the traditional water leaching salt method is prone to salt return; the reduction of evaporation by mulching has a good inhibitory effect on the salinization process of the soil, but it has a negative effect on the formed salt Alkaline soil cannot be...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10B09C1/02C12N1/20C12N1/14
Inventor 刘铮张坤花秀夫张敏莲徐圆圆
Owner CHINA PETROLEUM & CHEM CORP
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