A method for remediating oil-contaminated soil

A soil remediation and oil-polluted technology, applied in the field of oil-contaminated soil remediation, can solve the problems of long treatment cycle, extraction + biological method limitations, etc., and achieve the effect of convenient material collection, low production process requirements, and simple ultrasonic equipment

Active Publication Date: 2020-11-20
西安罗克环境修复有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxidation method has hidden danger of secondary pollution
Extraction+Biological is limited by its extractant
The biodegradation method is not suitable for soil with high oil content, and the treatment period is longer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for remediating oil-contaminated soil
  • A method for remediating oil-contaminated soil
  • A method for remediating oil-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for remediating oil-contaminated soil, comprising the following steps:

[0023] (1) Prepare inorganic culture medium: add NH to 100mL UP water 4 Cl 0.776g, KH 2 PO 4 0.05g, K 2 HPO 4 0.05g, CaCl 2 0.001g, MgSO 4 0.01g, adjust the pH to 6-6.5 with HCl (in the inorganic culture medium, the molar ratio of nitrogen-based compounds and phosphorus-based compounds is 10:1);

[0024] (2) production of fermented liquid: add the compound carbon source of 4% mass ratio in inorganic culture liquid, then sterilize at 121 ℃ of high temperature for 20min, inoculate the Pseudomonas aeruginosa of 1.5% (mass volume ratio) after cooling, The number of strains is 1×10 8 ~1×10 9 cells / mL (plate colony counting method), and cultured at a constant temperature for 96 hours at a temperature of 30°C and a rotation speed of 120r / min;

[0025] (3) Prepare cleaning solution: dilute the fermented solution to a mass concentration of 3% with clear water, and adjust the pH to 7-8 w...

Embodiment 2

[0031] A method for remediating oil-contaminated soil, comprising the following steps:

[0032] (1) Prepare inorganic culture medium: add NH to 100mL UP water 4 Cl 0776g, KH 2 PO 4 0.05g, K 2 HPO 4 0.05g, CaCl 2 0.001g, MgSO 4 0.01g, adjust the pH to 6-6.5 with HCl (in the inorganic culture medium, the molar ratio of nitrogen-based compounds and phosphorus-based compounds is 10:1);

[0033] (2) Production of fermented liquid: add 3% composite carbon source in mass ratio to inorganic culture liquid, then sterilize at 121° C. for 20 min, inoculate 1% (mass to volume ratio) of Pseudomonas aeruginosa after cooling, The number of strains is 1×10 8 ~1×10 9 cells / mL (plate colony counting method), and cultured at a constant temperature for 108 hours at a temperature of 30°C and a rotation speed of 120r / min;

[0034] (3) Prepare cleaning solution: dilute the fermented solution to a mass concentration of 5% with clear water, and adjust the pH to 7-8 with NAOH to form a clea...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
oil removal rateaaaaaaaaaa
Login to view more

Abstract

The invention discloses an oil contaminated soil remediation method. The method comprises the following steps: (1) preparing an inorganic culture solution; (2) adding a composite carbon source into the inorganic culture solution, performing high temperature sterilization, inoculating pseudomonas aeruginosa, and performing constant temperature culture for 96-108 h; (3) diluting a fermentation brothwith clean water and adjusting pH with NaOH to form a cleaning solution; (4) adding oil contaminated soil into the cleaning solution, and performing ultrasonic cleaning for 3-4 min at an ultrasonic frequency of 10-20 kHz; and (5) performing filtering and centrifugal separation on the mixture. The method adopts a method of "treating pollution with pollution", a pollutant is used as an inducing factor to be added into a specific culture medium, and then a produced fermentation broth acts on the pollutant. The fermentation broth production process has low requirements, obtaining of the production raw materials are convenient, no foreign microorganisms are introduced, ultrasonic equipment is simple and easy to operate, the cost for treating the oil-contaminated soil is low, and the method hasno damage to a soil structure, no secondary pollution, and high efficiency, and has significant remediation effects.

Description

technical field [0001] The invention belongs to the technical field of oil-contaminated soil remediation, and in particular relates to a method for remediating oil-contaminated soil. Background technique [0002] At present, there are about 10 million tons of oily sludge in my country that urgently need to be treated every year. The sources mainly include oily sludge produced in the process of crude oil exploitation, gathering and transportation, refining and oilfield sewage treatment. Due to the exploitation of shale gas and offshore oilfields, Its output is increasing year by year. Oily sludge is a hazardous waste. If it is not treated in time, its volatile hydrocarbons will pollute the air; second, its long-term stacking will pollute a wider range of soil and water; Mutant substances directly endanger the health of humans and animals. [0003] At present, the technologies for remediation of oil-contaminated soil mainly include: hot washing technology, thermal desorption ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/02C12N1/20C12R1/385
CPCB09C1/02C12N1/20
Inventor 马健波王楠韩斌王茹
Owner 西安罗克环境修复有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap