Composite remediation method for petroleum hydrocarbon contaminated soil

Abstract

A composite remediation method for petroleum hydrocarbon contaminated soil comprises the steps that: firstly, sampling, then culturing microorganisms through a sample, and thus obtaining a soil remediation agent; then roughly screening the soil, then piling the soil to be remediated to a remediation area, leveling and sprinkling water, keeping the soil humidity at 20%-35%, and standing for 1-3 days; spreading the soil remediation agent on the surface layer of the contaminated soil, ploughing to enable the soil remediation agent to be fully mixed with the contaminated soil, and standing for 10-15 days; then sprinkling water into the soil, sowing oilseed rape seeds, and maintaining until the oilseed rape grows into seedlings; and ploughing the contaminated soil on which the oilseed rape seedlings grow by adopting a ploughing machine, turning the oilseed rape seedlings into the contaminated soil, sowing the oilseed rape again after ploughing is completed, and sampling and detecting the soil after the oilseed rape seedlings grow into seedlings to complete soil remediation. According to the method, rhizosphere microbial communities are utilized, the soil carbon-nitrogen ratio is gradually changed through phagocytic degradation of crude oil substances, and a soil environment suitable for plant growth is restored and constructed, so that the soil toxicity is reduced.

Description

technical field [0001] The invention relates to the field of remediation of petroleum hydrocarbon-contaminated soil, in particular to a composite remediation method for petroleum hydrocarbon-contaminated soil. Background technique [0002] Pollution and omission accidents during oil exploration, smelting, use and transportation, discharge of oily wastewater, sewage irrigation, volatilization of various petroleum products, falling of incomplete combustion, relocation of abandoned well sites, chemical and refining enterprises, etc. Caused a series of soil petroleum hydrocarbon pollution problems. Some petroleum hydrocarbons have carcinogenic, teratogenic and mutagenic effects on mammals and humans after entering the animal body. Severe pollution of the soil will lead to the accumulation of certain components of petroleum hydrocarbons in the food, affecting the quality of the food, and passing through the food chain, endangering human health. [0003] Soil remediation refers ...

AI Technical Summary

Problems solved by technology

Microbial remediation technology generally has high requirements on soil temperature, moisture, and oxygen supply, and needs to introduce microorganisms to improve the degradation ability, so the cost is high and the difficulty is great