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Biodegradation method of methyl tert-butyl ether in ground water

A technology of methyl tert-butyl ether and biodegradation, applied in the direction of contaminated groundwater/leachate treatment, water pollutants, sustainable biological treatment, etc., can solve problems such as limited lifespan, and achieve low cost and high oxygen release rate Gentle, high total oxygen release effect

Inactive Publication Date: 2012-05-23
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]2. It has high solubility in water and is not easily absorbed by the aquifer medium
[0019]Oxygen-releasing materials are used for in-situ remediation of groundwater, and their lifespan is limited. Generally, the filler has to be replaced after the grid has been in operation for 5 to 6 months (Kao C.M. , et al., Chemosphere, 2001, 44(5): 925-934)

Method used

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  • Biodegradation method of methyl tert-butyl ether in ground water
  • Biodegradation method of methyl tert-butyl ether in ground water
  • Biodegradation method of methyl tert-butyl ether in ground water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1 Preparation of permeable bioreaction grid and its application in degrading MTBE in groundwater

[0057] 1.1 Materials and instruments

[0058] Calcium peroxide: industrial grade, 40% purity, the main impurity is Ca(OH) 2 (Tianjin Chilong Chemical Co., Ltd.);

[0059] Bentonite: Natural bentonite produced in Lin'an;

[0060] Sand: natural river sand, particle size less than 2mm;

[0061] Cement: 325# ordinary slag portland cement;

[0062] NH 4 Cl: industrial grade;

[0063] K 3 PO 4 : Industrial grade;

[0064] Microorganisms: Microbial sources obtained from the oily soil of a gasoline-contaminated site in Hebei Province, using glucose as a carbon source, and obtained after cultivation.

[0065] 1.2 Permeable bioreaction grid

[0066] Weigh bentonite / CaO 2 / cement / sand (or fly ash) / water (mass percentage: 10:20:25:15:30) is placed in a container and stirred evenly; then the resulting mixture is made into cubes with a side length of 3cm, Air dry un...

Embodiment 2

[0069] Example 2 Performance Research of Concrete Materials Containing Oxygen-releasing Compounds

[0070] 2.1 Materials and Instruments

[0071] Calcium peroxide: industrial grade, 40% purity, the main impurity is Ca(OH) 2 (Tianjin Chilong Chemical Co., Ltd.);

[0072] Bentonite: Natural bentonite produced in Lin'an;

[0073] Sand: natural river sand, particle size less than 2mm;

[0074] Cement: 325# ordinary slag portland cement;

[0075] JJ-4A six-connected electric mixer.

[0076] 2.2 Preparation of two different concrete materials

[0077] 2.2.1 Preparation of concrete material 1 (without bentonite)

[0078] As shown in Table 1-1, weigh the set ratio of CaO 2 / cement / sand / water is placed in a container and stirred evenly (water can be tap water), made into cubes with a side length of 3cm, and air-dried under natural conditions.

[0079] 2.2.2 Preparation of concrete material 2 (including bentonite)

[0080] (1) As shown in Table 1-1, weigh calcium peroxide and b...

Embodiment 3

[0101] Example 3 Performance Research on Bioreaction Grid for Degrading MTBE

[0102] 3.1 Experimental instruments and materials

[0103] Oily soil: taken from a gasoline-contaminated site in Hebei;

[0104] Sand: natural river sand, particle size less than 2mm;

[0105] Oxygen-releasing material: oxygen-releasing material 2 prepared in Example 2;

[0106] Groundwater: taken from the self-prepared well of China University of Geosciences (see Table 1 for composition), pH=7.38;

[0107] Glucose: Beijing Beihua Fine Chemicals Co., Ltd.;

[0108] Sodium azide (NaN 3 ): Tianjin Yuanli Chemical Co., Ltd. (analytical pure);

[0109] Methyl tert-butyl ether (MTBE): imported chromatographically pure (US Tedia Company), content> 99%;

[0110] Tert-butanol (TBA): imported chromatographically pure (USA Tedia Company), content > 99%;

[0111] Acetone (acetone): imported chromatographically pure (U.S. Fisher Company), content> 99%;

[0112] Purified water: commercially available 550...

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Abstract

The invention relates to a biodegradation method of methyl tert-butyl ether in ground water. The invention is characterized in the following steps: utilizing the material which releases oxygen and which contains bentonite as the padding of a reaction grating or well for the aerobes to purify the ground water contaminated by the methyl tert-butyl ether. The ingredients and proportioning of the materials are: 5-20 weight percent of oxygen releasing compounds, 5-20 weight percent of bentonite, 10-30 weight percent of sand and / or coal ash, the balance being coagulant. A reaction grating or a reaction well for the aerobes are placed at the lower reaches of the pinnate body flowing on the underground water contaminated by the methyl tert-butyl ether. The reaction grating or the reaction well for the aerobes is vertical to the flow of the underground water.

Description

technical field [0001] The invention relates to a bioremediation method for polluted groundwater, in particular to a biodegradation method for methyl tert-butyl ether in groundwater. Background technique [0002] Methyl tert-butyl ether (MTBE) is a colorless, flammable volatile organic compound with a pungent odor. It is an unleaded gasoline additive with excellent anti-knock properties. Burn completely. In the late 1960s, due to the great harm of leaded gasoline to human health and the environment, it was increasingly opposed by the public and environmentalists. As a substitute for lead salts such as tetraethyl lead, MTBE can significantly reduce CO emissions in automobile exhaust, increase gasoline octane number, improve combustion efficiency, and reduce ozone generation. It was widely used in the early 1970s. MTBE is also known as Its excellent performance and low production cost have made it one of the fastest growing petrochemical products in the past 20 years. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10C02F103/06C02F101/34
CPCY02W10/10
Inventor 刘菲谢李陈鸿汉王超缪德仁刘丹丹
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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