In situ integrated restoring system and method of petroleum polluted soil

Abstract

The invention discloses an in situ integrated restoring system and a method of petroleum polluted soil, and belongs to the technical field of petroleum polluted soil restoration. The system provided by the invention is composed of a suction well, a vacuum pump, a steam-water separation system, an oil-water separation system, a dosage pot, an injector pump, an injection well and an automatic control system. With the combination of the merits of vacuum suction and biological restoration, free-phase and high-density gas-phase pollutants in soil can be sucked and pumped in the invention; and simultaneously a surfactant reinforced biological restoration method can be adopted to accelerate the degradation or transformation and distribution of petroleum pollutants adsorbed on soil, so as to raise the in situ soil restoration efficiency, shorten the technological process, reduce the restoration cost and widen the application range of the in situ restoration technology.

Description

technical field [0001] The invention belongs to the technical field of remediation of petroleum-contaminated soil, and in particular relates to an in-situ comprehensive remediation system and method for petroleum-contaminated soil. Background technique [0002] Soil oil pollution will be caused in the process of oil extraction, smelting, use and transportation, as well as the discharge of oily wastewater and sewage irrigation; the volatilization of various petroleum products and the falling of incomplete combustion can also cause a series of soil oil pollution; underground Spills of petroleum products from storage tanks are currently the most common cause of soil and groundwater contamination. Petroleum pollutants will change the composition of soil organic matter, destroy soil structure, affect soil permeability, and hinder plant root respiration; BTEX and polycyclic aromatic hydrocarbons in petroleum have carcinogenic, mutagenic, and teratogenic effects, and can pass throu...

AI Technical Summary

Problems solved by technology

What's more, these traditional technologies can often only target a certain type of pollutants, or the treatment of a single pollutant.

For example, soil steam extraction technology and biological flushing technology can only be used for the removal of pollutants in the unsaturated zone, while pump treatment technology can only be used for the removal of dissolved pollutants in the saturated zone aquifer

In fact, due to different pollution conditions, the pollution degree of oil-contaminated soil and the nature of pollutants are quite different. At the same time, due to the limitations of various environmental conditions and technological maturity, the practicability of various treatment technologies is also limited certain restrictions

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