Method capable of facilitating bioremediation of oil-contaminated soil

A technology for bioremediation and oil pollution, applied in the field of environmental governance, can solve problems such as difficult operation, secondary pollution, and high cost, and achieve the effects of fewer procedures, lower repair costs, and simple operation

Inactive Publication Date: 2016-03-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] Based on the problems existing in the prior art, the present invention provides a method capable of promoting biological remediation of oil-contaminated soil, which solves the problems of high cost, difficult operation, and easy secondary pollution in the remediation process of oil-contaminated soil in the prior art. technical issues

Method used

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  • Method capable of facilitating bioremediation of oil-contaminated soil
  • Method capable of facilitating bioremediation of oil-contaminated soil
  • Method capable of facilitating bioremediation of oil-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: H 2 o 2 Experiments on the effect of concentration on biomass and soluble nutrients.

[0034] The experiments were divided into two groups, a and b, both of which were carried out in 250mL reaction bottles. First, 5g of petroleum-contaminated soil samples were added, and then 5mL of citric acid-FeSO was added to the reaction bottles of group a. 4 Solution (2.9mM), add 5mL distilled water in the reaction bottle of group b experiment. Then add 30% H in the reaction flask 2 o 2 0.3mL, 0.6mL, 1.35mL, 2.7mL, 5.4mL, 7.2mL, 10.8mL. And add distilled water simultaneously to make the solution total volume of reaction system be 60mL, at this moment, H in the reaction bottle 2 o 2 The concentrations are 50mM, 100mM, 225mM, 450mM, 900mM, 1200mM, 1800mM, respectively. At the same time do not add H 2 o 2 The reaction bottle was used for the control experiment. Determination of TOC and NH in the supernatant before and after oxidation 4 + - the concentration of N...

Embodiment 2

[0035] Example 2: Effect test of bioremediation after Fenton treatment.

[0036] The experiment was also divided into two groups a and b, and the experiment was carried out in a 250mL saline bottle. Group a added 5mL of citric acid-FeSO4 solution (2.9mM), add 5mL of distilled water to group b. On the basis of embodiment 1, choose 225Mm (F 1 ), 450mM (F 2 ), 900mM (F 3 ) after Fenton treatment with three concentrations of hydrogen peroxide, the reaction bottle was placed on a shaker for 80 days of bioremediation experiments (125rmp, 25°C) (Tim, 2014). The reaction bottle was sealed with a rubber stopper and poured to Oxygenate the reaction bottle to ensure that the oxygen concentration in the reaction bottle is not lower than 10%. On the 10th day, the 20th day, the 40th day, the 60th day and the 80th day, the oil in the reaction bottle was extracted to determine the TPH, and the TOC and NH in the supernatant were measured 4 + -N, NO 2 - -N, NO 3 - -N concentration and...

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Abstract

The invention provides a method capable of facilitating bioremediation of oil-contaminated soil. Oxidation remediation is performed firstly and then bioremediation is performed on the contaminated soil. During oxidation remediation, a H2O2 solution serves as an oxidation reagent; after oxidation remediation, the soil is oxidized through the H2O2 solution to generate nutrition so as to facilitate later-stage bioremediation; during bioremediation, no extra nutrition of microorganisms is needed, and bioremediation is performed directly through self microorganisms in the contaminated soil. By means of the method, a large quantity of soluble nutrition can be released by the contaminated soil and supplied to the microorganisms through chemical oxidation, and no extra nutrient substance is needed. Therefore, the remediation cost is reduced, the operation is simple, a few steps are needed, and defects such as secondary contamination are avoided. Under the extra condition of soluble iron, a large quantity of soluble nutrition can be released, and the subsequent bioremediation is further facilitated.

Description

technical field [0001] The invention belongs to the field of environmental management, relates to the remediation of petroleum-contaminated soil, and in particular relates to a method capable of promoting bioremediation of petroleum-contaminated soil. Background technique [0002] In-situ bioremediation (ISB) is one of the main methods for treating oil-contaminated soil. Compared with in-situ chemical oxidation, it has the advantages of low cost and no secondary pollution. [0003] However, bioremediation technology takes a long time and microorganisms have certain selectivity for polluting the environment. At present, the methods to improve the bioremediation ability are mainly through the improvement of biological activity and the biodegradability of pollutants. [0004] In terms of improving biological activity, at present, it is mainly to change the soil environment by adding nutrients (such as fertilization), biological ventilation, etc. to improve the biological activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/10
Inventor 徐金兰崔祎炜王琦邓鑫
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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