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Preparation method and use method of inoculant used for river basin hexavalent chromium pollution treatment

A technology for pollution control and hexavalent chromium, applied in the field of chromium pollution control, can solve problems such as hereditary gene defects, allergies, and carcinogenicity, and achieve high reduction efficiency and strong removal of hexavalent chromium

Inactive Publication Date: 2017-02-01
路域生态工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hexavalent chromium is highly toxic. Hexavalent chromium is a poisonous substance for swallowing / inhalation. Skin contact may cause allergies; it is more likely to cause genetic defects, inhalation may cause cancer, and has a persistent danger to the environment.

Method used

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  • Preparation method and use method of inoculant used for river basin hexavalent chromium pollution treatment
  • Preparation method and use method of inoculant used for river basin hexavalent chromium pollution treatment
  • Preparation method and use method of inoculant used for river basin hexavalent chromium pollution treatment

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preparation example Construction

[0037] The preparation method of the bacterial strain comprises the following steps:

[0038] Step 1, preparation of fermentation raw materials: according to the mass percentage of water, preparation of fermentation raw materials, liquid molasses 5.0%, industrial glucose 1.0%, industrial yeast powder 0.5%, bran powder 3.0% (crushing requirements less than 100 mesh), malt extract 1.0% %, dipotassium hydrogen phosphate 0.3%, sodium dihydrogen phosphate 0.1%, ammonium sulfate 0.5%, magnesium sulfate 0.05%;

[0039]Step 2, sterilization: put the raw materials in step 1 into a fermenter for sterilization, the sterilization temperature is 121°C, and the sterilization time is 0.5 hours;

[0040] Step 3, fermentation: After sterilization, ferment the fermenter containing the fermentation raw materials; the fermentation temperature is controlled at 30-32°C, and the fermentation time is 96 hours. It is 1:0.5 for 24 hours, and 1:1 for 24 to 96 hours. The tank pressure of the fermenter i...

Embodiment 1

[0047] Embodiment 1. Detection basis

[0048] Determination method of hexavalent chromium in sewage:

[0049] Determination of hexavalent chromium in water quality Diphenylcarbonated dihydrazine spectrophotometric method GB7467-1987

[0050] Determination method of total chromium in sewage:

[0051] Water Quality Determination of Total Chromium Potassium Permanganate Oxidation-Diphenylcarbonate Dihydrazine Spectrophotometric Method GB7466-1987

Embodiment 2

[0052] Embodiment 2 The specific steps of the product of the present invention to process high-concentration hexavalent chromium heavy metal polluted water are as follows:

[0053] The product produced by the above method was added to 1 of the hexavalent chromium-contaminated water, and the concentration of hexavalent chromium contained in 1 of the polluted water was 1790mg / L. The volume ratio of the product to the polluted water is 2.5:100 (L / L), the pH value of the polluted water is adjusted to 7.0, the temperature of the polluted water is controlled to be 30°C, and the stirring speed is 100r / min. Concentrations of chromium and hexavalent chromium. Sampling was stopped when the concentration of Cr(VI) in the medium was lower than the detection limit.

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Abstract

The invention discloses a production method of Streptomyces puniceus strain LYzhlm (with the preservation number of CGMCC No.11773) inoculant, and a use method using the above product to treat hexavalent chromium polluted water. Experiments using the product to treat hexavalent chromium polluted water show that the product can reduce the concentration of hexavalent chromium in sewage to 0.08 mg / L from 1790 mg / L, so hexavalent chromium discharge standards are completely reached, and the removal rate is 100%. The invention also discloses a production technology of the above strain, and conditions and a method for treating the hexavalent chromium polluted water. The use method using the product to treat hexavalent chromium polluted water has the advantages of simple process, avoiding of secondary pollution generated in chemical methods, convenience in use, and wide market prospect.

Description

technical field [0001] The invention relates to the technical field of chromium pollution control, in particular to a method for preparing and using a bacterial agent for the control of hexavalent chromium pollution in watersheds. Background technique [0002] Chromium is a hard, silvery-white metal that comes in divalent, trivalent and hexavalent compounds. Chromium has a wide range of industrial uses, mainly in metal processing, electroplating, and tanning industries. Wastewater and waste gas discharged from these industries are the main sources of pollution in the watershed environment. Hexavalent chromium is highly toxic. Hexavalent chromium is a poisonous substance for swallowing / inhalation. Skin contact may cause allergies; it is more likely to cause genetic defects, inhalation may cause cancer, and has a long-lasting danger to the environment. But these are the characteristics of hexavalent chromium, chromium metal, trivalent or tetravalent chromium do not have these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C02F3/34C12R1/46C02F101/22
CPCC02F3/348C02F2101/22C12N1/20
Inventor 孙莹赵英王新民
Owner 路域生态工程有限公司