A Composting Method for Restoring Petroleum Hydrocarbon Contaminated Soil Using Biogas Slurry

A technology of contaminated soil and petroleum hydrocarbons, applied in the field of soil remediation, can solve the problems of heavy workload, high cost, and low efficiency, and achieve the effect of low cost, reduced remediation cost, and simple treatment method

Active Publication Date: 2020-12-08
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high cost, low efficiency, and heavy workload in the restoration of petroleum-contaminated soil, and make full use of the nutrients and microbial groups in the anaerobic fermentation liquid, the present invention provides a compost that uses biogas slurry to repair petroleum-hydrocarbon-contaminated soil method

Method used

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  • A Composting Method for Restoring Petroleum Hydrocarbon Contaminated Soil Using Biogas Slurry
  • A Composting Method for Restoring Petroleum Hydrocarbon Contaminated Soil Using Biogas Slurry

Examples

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Effect test

Embodiment 1

[0036] Take a petroleum hydrocarbon-contaminated soil in Beijing, the petroleum hydrocarbon content in the soil is 1729mg / kg, remove large particles such as stones and plants, crush and sieve, and pass through a 2mm sieve; air-dry it, the ventilation rate is 50-100mL / min, and its moisture content is adjusted. 10-15%.

[0037] Take the biogas slurry after anaerobic fermentation, remove impurities such as large particles, and adjust the pH of the filtered liquid to 7.

[0038] Add 4.5L of biogas slurry to 18.65kg of petroleum hydrocarbon-contaminated soil, add 4.42kg of rice husk, stir evenly and place it in the open space for composting. Another group was set up with water instead of biogas slurry as a control. Wherein the water content is adjusted to 45%, and the C / N is adjusted to 18:1. Until the end of composting, it is regarded as the restoration stop.

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Abstract

A composting method for restoring petroleum hydrocarbon contaminated soil through biogas liquid comprises the following steps that (1) the biogas liquid is added into the petroleum hydrocarbon contaminated soil and fully stirred; and (2) under the natural condition, composting, water replenishing and periodical turning are conducted. According to the composting method, the biogas liquid can be reused after anaerobic fermentation, the treating cost of the biogas liquid is reduced, resource utilization is achieved, petroleum pollutants are reduced, the soil fertility is improved, and the toxicity of the soil is reduced. The composting method has the advantages that operation is easy and convenient, the degradation efficiency is high, the influence on the environment is low, and secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the field of soil remediation, and in particular relates to a composting method for remediating petroleum hydrocarbon-contaminated soil by using biogas slurry. Background technique [0002] In recent years, with the development and demand of the national economy, the supply of petroleum products has continued to increase. In the process of oil extraction, storage, transportation, and refining, a large amount of crude oil enters the soil, causing soil pollution, which further affects the growth of crops or plants. According to statistics, the area of ​​oil-contaminated soil in my country has reached 100,000 mu, and it is still growing. Therefore, oil pollution has become a prominent problem in soil environmental protection, posing a serious threat to the ecological environment and human health. [0003] At present, the remediation methods for oil-contaminated soil mainly include physical methods, chemical methods and biologica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
CPCB09C1/10
Inventor 何小松赵昕宇席北斗王晓伟李丹张慧
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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