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Sulfate reducing bacteria embedded particle for treating ionic rare earth mine wastewater as well as preparation method and application thereof

A technology for ionic rare earths and mine wastewater, applied in the direction of microorganism-based methods, biochemical equipment and methods, chemical instruments and methods, etc., can solve the problems that affect the application effect and the carbon source has not been processed, so as to make up for the poor mechanical properties , Solve the poor application effect and reduce the inhibition effect

Active Publication Date: 2020-08-11
JIANGXI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN109626577A discloses a graphene oxide-enhanced anammox granule and a preparation method thereof. A block-shaped embedding granule is made by using graphene oxide strengthening through particle embedding technology, which is more suitable for industrial batch production. However, during use Additional carbon sources are also required
CN110697907A discloses an immobilized composite flora material and its preparation method. Polyvinyl alcohol and sodium alginate are used as the outer embedding agent, and corn stalks are added to the outer layer to provide carbon sources for denitrifying bacteria, but the carbon sources have not been processed , affecting its practical application effect

Method used

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  • Sulfate reducing bacteria embedded particle for treating ionic rare earth mine wastewater as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare enhanced immobilized sulfate-reducing bacteria-embedded granules as follows:

[0045] (1) First, carry out anaerobic enrichment culture on the screened sulfate-reducing bacteria to obtain a sulfate-reducing bacteria enrichment solution; the sulfate-reducing bacteria enrichment solution and sterile water are made into an anaerobic hanging film according to the mass ratio of 1:9 liquid; adding granular nanometer zero-valent iron biochar into the anaerobic membrane-hanging liquid, and membrane-hanging for 4-7 days to obtain membrane-hanging biochar balls;

[0046] (2) Carry out enrichment culture of complex molds to obtain mold enrichment liquid; add mold enrichment liquid into sterile water at a ratio of 1:9 to obtain composite mold film-hanging liquid; Add 3-5g H-type mordenite to 100ml, keep the aerobic state for 3-7 days, and obtain the membrane-forming zeolite;

[0047] (3) Rinse and dry the slow-release carbon source with alkali after modification; the coate...

Embodiment 2

[0053] The steps are the same as in Example 1, the difference is that the mass ratio of the film-coated zeolite and the modified slow-release carbon source is 3:200; 3:14.

Embodiment 3

[0055] The artificial wetland simulation system in the laboratory is used, and the vertical flow wetland and the surface flow wetland are set in series. The middle and lower layers of the wetland matrix are filled with the sulfate-reducing bacteria-embedded particles prepared in Example 1 with a volume ratio of 30%. Artificial simulation of heavy metal lead-ammonium sulfate complex pollution is adopted, in which the concentration of lead influent is 10mg / L, the concentration of ammonium sulfate influent is set at 900mg / L, the temperature is set at 25-35°C, the hydraulic retention time is set at 72h, and appropriate supplement carbon source. The wetland system first operates at 10% influent concentration for 15 days, then at 30% influent concentration for 15 days, and then at 70% influent concentration for 15 days. After the system is stabilized, run continuously for 3 months with 100% influent concentration. During the whole test period, every 2 days, the water was taken out ...

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Abstract

The invention relates to the field of water environment protection, in particular to sulfate reducing bacteria embedded particles for treating ionic rare earth mine wastewater as well as a preparationmethod and an application of the sulfate reducing bacteria embedded particles, and solves the problem that sulfate reducing bacteria in SRB treatment acid mine wastewater are poisoned by heavy metalsand insufficient carbon sources to influence the practical application effect. The embedded particle is of a multi-layer structure and is sequentially composed of a sulfate reducing bacteria biofilmculturing charcoal layer, a composite hydrolase slow-release carbon source layer, an adsorption layer and a cross-linking layer from inside to outside. The invention provides an embedded particle integrated double hydrolysis catalysis system, the release of a slow-release carbon source can be accelerated, an anaerobic environment required by reaction is provided, the toxic action of heavy metals and acid radical ions on sulfate reducing bacteria is reduced, the practical application effect is improved, and sulfate radicals and heavy metal ions in acidic mine wastewater and ionic rare earth mine wastewater can be effectively reduced.

Description

technical field [0001] The invention relates to the field of water environment protection, in particular to a sulfate-reducing bacteria-embedded particle for treating ionic rare earth mine wastewater, a preparation method and application. Background technique [0002] Sulfate-reducing bacteria (SRB) are a type of anaerobic reducing bacteria that can use organic carbon to reduce sulfate ions under anaerobic conditions to produce S 2- ion, S 2- The ions and heavy metals in the water produce sulfide precipitation, and at the same time produce alkaline substances to increase the pH, and at the same time achieve the removal of sulfate ions and heavy metal ions. The SRB method has significant advantages in acid mine drainage (Acid Mine Drainage, AMD). The SRB method has the advantages of low cost, strong applicability, and no secondary pollution. [0003] However, there are obvious deficiencies in using SRB to treat mine wastewater. Heavy metals are generally toxic to microorgan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C12N11/14C12N11/10C12N11/084C02F101/10C02F101/20C12R1/885C12R1/66
CPCC02F3/345C02F3/347C02F2101/101C02F2101/20C02F2305/06C12N11/10C12N11/14C12N11/084Y02A40/22
Inventor 辛在军吴永明孙小艳邓觅姚忠王玺洋李亮李晓辉游海林陈艺超
Owner JIANGXI ACADEMY OF SCI
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