Method for remedying heavily oil-contaminated soil

A technology for oil pollution and soil, applied in the field of contaminated soil treatment, can solve the problems of affecting the growth of crops, the limitation of microbial or phytoremediation ability, and high cost, and achieve the effect of economical and environmental restoration, permanent elimination of pollutants, and low cost
CN108655162AActive Publication Date: 2018-10-16LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
Publication Date
2018-10-16
Patent Text Reader

Abstract

The invention discloses a method for remedying heavily oil-contaminated soil, and belongs to the technical field of polluted soil treatment. The method comprises the steps that 1, a surfactant is spread to a heavily oil-contaminated land parcel, the surface layer soil on the land parcel is shoveled away and stacked, animal excrement, crop straw, bentonite, urea and first oil decomposing bacteria are added for fermentation; 2, the land parcel with the surface layer soil shoveled away is turned over for 25-40 cm, water is evenly spread to reach the soil humidity being 50-65%, the pH of soil is adjusted to 7-10, second oil decomposing bacteria is added to the turned-over land parcel, alfalfa is planted on the turned-over land parcel, and the 2-3 crops of alfalfa are harvested and added into afermentation heap in the step 1 for fermentation; and 3, fermentation products in the step 1 are granulated in a granulation machine to form organic fertilizer to be spread to the alfalfa planting area. A bioremediation and phytoremediation cyclic degradation mode is formed, and the method is economical, environmentally friendly and good in remedying effect.
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Description

technical field

[0001] The invention relates to the technical field of contaminated soil treatment, in particular to a method for repairing heavily oil-contaminated soil. Background technique

[0002] With the rapid development of the petroleum industry, pollution and omission accidents in the process of petroleum exploration, smelting and transportation, as well as the discharge of oily wastewater have caused soil pollution problems. After petroleum enters the soil, it will destroy the soil structure. Affect the permeability of the soil, reduce the soil quality, oil stains adhere to the plant root system, form a layer of mucous film, hinder the absorption of nutrients and water by the plant root system, cause the root system to rot, and affect the growth of crops. Remediation, the dissolved gas in the oil-contaminated soil exposed to the open air will volatilize into the atmosphere, causing air pollution, and the oil-contaminated soil can flow into the water area with rainw...

Claims

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