Method for strengthening organic contaminated site remediation by combining room temperature thermal desorption with biological stack

A technology of organic pollution and remediation methods, applied in the field of soil remediation, can solve the problems of atmospheric environment pollution, secondary pollution, low removal efficiency, etc., and achieve the effects of high removal efficiency, short adaptation period and improved mobility

Active Publication Date: 2020-04-14
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, bio-piles are generally treated in the open air, and volatile organic compounds are likely to pollute the atmospheric environment. In the process of open-air bio-piles, the microbial degradation activity and the mobility of organic matter are greatly affected by weather changes, and the removal efficiency is low.
In addition, the polluted area of ​​organically polluted sites in China is relatively large, and there are many contaminated soil sites. The transportation cost of ex-situ restoration is high, and secondary pollution is likely to be caused during transportation.

Method used

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  • Method for strengthening organic contaminated site remediation by combining room temperature thermal desorption with biological stack
  • Method for strengthening organic contaminated site remediation by combining room temperature thermal desorption with biological stack
  • Method for strengthening organic contaminated site remediation by combining room temperature thermal desorption with biological stack

Examples

Experimental program
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Embodiment approach

[0063] According to a preferred embodiment of the present invention, the gas collection unit 2 is arranged on the top of the inner wall of the air-supported membrane structure unit 1, to collect the pollutants in the solar greenhouse,

[0064] The gas collection unit 2 includes an induced draft fan and a gas collection pipeline connected in sequence.

[0065] In the present invention, the volatile organic matter in the enclosed area can be effectively collected and sucked by setting the gas collection unit, which improves the concentration difference of soil-air organic pollutants and promotes the soil-air mass transfer of organic pollutants. Specifically, the air-supported membrane structure unit makes the temperature in the greenhouse rise, which breaks the chemical bonds between the organic pollutant molecules and the soil particles, resulting in an increase in the concentration of organic matter in the soil gas, while the concentration of organic matter in the air is collec...

Embodiment 1

[0159] Follow the steps below for organic contaminated site remediation:

[0160] (1) Build a sun shed with a size of 50×25㎡, a ceiling height of 5m, doors on both sides, and hardened ground. The sunshine greenhouse is composed of an air film structure unit, a gas collection unit, an exhaust gas treatment unit and a detection unit. Among them, the air film structure unit is a steel structure frame, and the five-sided light-transmitting material is made of glass fiber reinforced plastics; the gas collection unit is mainly composed of an induced draft fan and a gas collection pipe, with a power of 5.5kw and an air volume of 7000m 3 / h. The gas processing unit is set outside the greenhouse and connected to the air duct of the gas collection unit, including a dust collector and an activated carbon adsorption device. The detection unit is set inside the greenhouse, specifically a fixed PID detector and a wall-mounted combustible gas alarm to monitor the concentration of indoor vo...

Embodiment 2

[0171] The method used in this example is similar to Example 1, the difference is that in step (2), pig manure and microbial agent are dissolved in water, both are added at 1.0% of the weight of the polluted soil, and the water content is adjusted to 18%.

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Abstract

The invention discloses a remediation method for an organic contaminated site. The method comprises the following steps: step 1, constructing a sunlight greenhouse; step 2, preprocessing the soil of an organic contaminated site; step 3, carrying out biological stack treatment on the preprocessed soil; and step 4, carrying out quality control on the biological stack so as to carry out soil remediation. According to the invention, the sunlight greenhouse is constructed in the original range of the organic contaminated site; the biological stack is placed in the sunlight greenhouse and is subjected to the biological stack treatment; heat gathered in the sunlight greenhouse is used for promoting volatilization of volatile organic matters in soil, secondary pollution is avoided, meanwhile, a microbial agent and a nutritional agent are added into contaminated soil to promote degradation and conversion of adsorbed organic matters, the pollutant removal efficiency is high, the remediation effect is good, no pollution is caused to the atmosphere, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for strengthening organic pollution site remediation by normal temperature thermal analysis combined with biological piles. Background technique [0002] Organic pollution in soil is caused by leakage due to human factors in the process of mining, transportation, processing, and storage, which changes the physical and chemical properties of the soil and the structure of biological communities, and enters the biosphere through enrichment, causing harm to humans, animals and plants. lives are threatened. In recent years, chemical companies have relocated, and the organic pollutants in the soil of the leftover sites have seriously exceeded the standard, which has affected the secondary development and utilization of the land. Therefore, site pollution restoration is imminent. [0003] In the prior art, physical methods (gas phase extraction, soil replacement metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10B09C1/06B09C1/00B08B15/00B01D53/04
CPCB01D53/04B08B15/00B09C1/00B09C1/06B09C1/10B09C2101/00A01G9/246Y02E50/30Y02A40/25A01G9/14B09C1/08
Inventor 何小松席北斗郑一鸣单光春赵航正刘洪宝
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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