Ex-situ bioremediation method of soil contaminated by organic matters

Abstract

The invention relates to an ex-situ bioremediation method of soil contaminated by organic matters. The ex-situ bioremediation method comprises the following steps of: crushing and mixing the soil and mushroom residues; adding fertilizers to the soil to regulate the content of organic carbon and mineral nutrition of the soil and keep the soil moist; establishing a biological heap after the pH value of the soil is regulated; and simultaneously monitoring the temperature, humidity and oxygen content of the biological heap, and carrying out active aeration and passive aeration on the biological heap. According to the ex-situ bioremediation method of the soil contaminated by the organic matters, indigenous microorganisms of the soil are adopted to degrade organic pollutants of the soil, the steps of screening and strengthening of microorganisms are eliminated, the cost is low, the ex-situ bioremediation method is easily implemented and can be applied to small-scale industrial application, the labor investment is reduced, and the production efficiency is improved; the mushroom residues, which are generated in the production of edible mushrooms, are adequately utilized and recycled, so that not only is the pressure to the ecological environment from the mushroom residues relieved, but also the mushroom residues are adopted to accelerate the degradation of the organic pollutants of the soil and contribute to the protection of the ecological environment; and tests show that after the method is carried out for a cycle, the degradation rate of the biological degradation method on nitrobenzene reaches 99.1%, and the concentrations of polycyclic aromatic hydrocarbons such as phenanthrene, acenaphthene and naphthalene decrease below limit of detection.

Description

technical field [0001] The invention relates to an ex-situ bioremediation method for soil polluted by organic matter, and belongs to the technical field of soil remediation. Background technique [0002] Soil is an important part of the ecosystem and one of the environmental resources on which human beings depend. With the rapid development of modern industrial and agricultural production, the extensive use of chemical fertilizers and pesticides, oil wells, mine mining, and atmospheric deposition, the status quo of soil pollution continues to deteriorate. After pollutants enter the soil, they may not only enter the food chain through agricultural production, posing a serious threat to the safety of agricultural products, but also cause secondary pollution to surface water, groundwater and other water bodies, and may be ingested by the human body through various channels, endangering the health of the population. [0003] In recent years, with the acceleration of my country'...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to apply mushroom residues to the bioremediation of organic matter-contaminated soil, and provide an ex-situ bioremediation method of organic matter-contaminated soil, which can be used in industrial applications with low cost and easy operation

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