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Biological ferrous sulfide and uranium-polluted underground water treatment permeation reaction wall based on same

A technology of osmosis reaction wall and biological iron sulphur, applied in biological water/sewage treatment, polluted groundwater/leachate treatment, water/sludge/sewage treatment, etc., can solve the problem of low removal efficiency of heavy metals and low product stability , poor adaptability and other problems, to achieve the effect of increasing the amount of groundwater intercepted, high degree of automation, and easy operation

Inactive Publication Date: 2016-08-03
NANHUA UNIV
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  • Description
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Problems solved by technology

[0007] Another object of the present invention is to provide a biosulfur-iron composite material. The biosulfide-iron composite material of the present invention contains a variety of bacteria in a balanced ecological relationship, which solves the problems of poor adaptability of single microorganisms, low product stability and removal efficiency of heavy metals in the past. low level problem

Method used

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  • Biological ferrous sulfide and uranium-polluted underground water treatment permeation reaction wall based on same
  • Biological ferrous sulfide and uranium-polluted underground water treatment permeation reaction wall based on same
  • Biological ferrous sulfide and uranium-polluted underground water treatment permeation reaction wall based on same

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preparation example Construction

[0040] The preparation method of biosulfur iron composite material provided by the invention specifically comprises the following steps:

[0041] Step 1: Using the anaerobic sludge to obtain the complex flora liquid in the fermentation medium through the method of enrichment-screening-enrichment. Fermentation medium: 2g / lMgSO 4 , 5g / l sodium citrate, 1g / l CaSO 4 , 1g / lNH 4 Cl, 0.5g / lK 2 HPO 4 , 3.5g / l sodium lactate, 1g / l yeast extract, 2ml / l 5% ferrous ammonium sulfate (FAS) solution. Adjust the pH of the medium to 7.5 and sterilize in an autoclave at 121° C. for 20 minutes, and add ferrous ammonium sulfate after autoclaving.

[0042] Step 2: Configure a compound culture medium containing complex flora containing carbon and nitrogen sources and inorganic elements, adjust the pH of the medium to 7.5 and sterilize it in an autoclave at 121°C for 20 minutes, and add ferrous ammonium sulfate after autoclaving to prevent ferrous Iron ions oxidize at high temperatures. The c...

Embodiment 1

[0057] Embodiment 1: Preparation of biological sulfur iron composite material

[0058] The complex flora was isolated and enriched from the anaerobic sludge sample from the lotus pond bottom of Nanhua University.

[0059] Configure fermentation medium: 2g / lMgSO 4 , 5g / l sodium citrate, 1g / l CaSO 4 , 1g / lNH 4 Cl, 0.5g / lK 2 HPO 4 , 3.5g / l sodium lactate, 1g / l yeast extract, 2ml / l 5% ferrous ammonium sulfate (FAS) solution. Adjust the pH of the medium to 7.5 and sterilize in an autoclave at 121° C. for 20 minutes. After autoclaving, add ferrous ammonium sulfate, because ferrous ions are easily oxidized at high temperatures.

[0060] The complex flora is a facultative anaerobic bacteria, which can reduce sulfur oxides such as sulfate, sulfite, thiosulfate, and elemental sulfur into hydrogen sulfide. In the medium with ferrous salts, the liquid The culture medium turned black completely; while the solid medium had black colonies in the presence of ferrous iron salts. In this...

Embodiment 2

[0067] The present invention provides a kind of bio-iron sulfur composite material, comprising ferrous sulfide and the composite flora combined on the ferrous sulfide, the ratio of the number of the composite flora to the ferrous sulfate per unit mass is 4×10 7 , the composite flora includes Desulfovibrio, Clostridium, Citrobacter, Trichococcus, Acinetobacter, Pseudomonas, Geobacter, Desulfurispora and Sulfurospirillum. The composite flora includes 15 parts of Desulfovibrio, 9 parts of Clostridium, 1 part of Citrobacter, 0.2 part of Leuconostoc, 0.05 part of Acinetobacter, 0.02 part of Pseudomonas, 0.02 part of Geobacter, desulfurization Bacillus 0.01 part, sulfurmonas 0.01 part.

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Abstract

The invention discloses a biological ferrous sulfide composite material which comprises ferrous sulfide and synthetic bacteria bonded to the ferrous sulfide .The ratio of the number of microorganisms of the synthetic bacteria to the ferrous sulfate of unit mass is 3.3*107-5*107 cfu / mg .The synthetic bacteria mainly comprise Desulfovibrio and Clostridium .The invention further discloses a uranium-polluted underground water treatment permeation reaction wall based on the biological ferrous sulfide .The uranium-polluted underground water treatment permeation reaction wall comprises a reaction well and a reaction medium .The reaction well is arranged in soil containing uranium-polluted underground water and located on an underground water flowing path, and the top of the reaction well is flush with the ground and provided with an upward first opening .The reaction medium is arranged in the reaction well and is the biological ferrous sulfide composite material .The prepared material and the device have high removal rate for uranium in water, secondary pollution is avoided, regenerability is good, and the requirements of current underground water uranium-polluted permeation reaction wall materials are met.

Description

technical field [0001] The invention belongs to the field of environment and groundwater treatment, and in particular relates to a biosulfide and a osmotic reaction wall based on it for treating uranium-contaminated groundwater. Background technique [0002] In the past few decades, due to the extensive development of uranium mining and enriched uranium processing industry, a large amount of uranium pollution in groundwater has been caused. Although the activity of the radionuclide uranium is low, its long half-life, large amount of waste, and wide distribution pose a long-term potential hazard to the environment. The harm of uranium is mainly manifested in its heavy metal chemical toxicity and radioactive radiation. When it enters the human body, it mainly accumulates in the liver, kidney and bones. Depending on the dose, it can cause acute or chronic poisoning, induce various diseases, cause liver damage and induce cancer. [0003] The migration and dispersion of nuclide...

Claims

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Application Information

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IPC IPC(8): C02F3/34G21F9/18C02F103/06C02F101/20
CPCC02F3/34C02F2101/20C02F2103/06G21F9/18
Inventor 曾涛涛谢水波周玉林廖伟祝鹏烽李仕友初雨薇
Owner NANHUA UNIV
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