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Compound biological preparation and application thereof in treatment of mercury-containing wastewater

A technology of biological preparations and fermented liquids, applied in biological water/sewage treatment, methods based on microorganisms, immobilized on/in organic carriers, etc., can solve the problem that the concentration of mercury ions cannot be reduced very low and the concentration of effluent is difficult to achieve Discharge standards, incomplete wastewater treatment and other issues, to achieve the effect of improving the adhesion of bacterial strains, reducing the amount of sludge produced, and reducing the availability

Active Publication Date: 2017-08-29
FUYANG HUAIBANG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the precipitation method is that it is easy to cause water hardening, and the wastewater containing low concentration of mercury is not completely treated, which easily leads to secondary pollution; affected by the precipitant, environmental conditions and process control parameters, the concentration of the effluent is difficult to meet the discharge standard, so it is still needs further processing
The disadvantage of the electrolysis method is that the concentration of mercury ions in the water cannot be reduced very low, the power consumption is large, the investment cost is high, and mercury vapor is easily generated, causing secondary pollution.
The disadvantage of the activated carbon adsorption method is that the supply of activated carbon is relatively tight, the regeneration equipment is less, and the regeneration cost is high.
The disadvantages of biochemical treatment are low efficiency and difficult strain selection

Method used

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  • Compound biological preparation and application thereof in treatment of mercury-containing wastewater
  • Compound biological preparation and application thereof in treatment of mercury-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A compound biological preparation, which is prepared according to the following process:

[0031] 1) Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae, Sporosporium thermophiles and Bacillus cereus were cultured on slant, shake flask seeds and fermenter respectively to obtain Pseudomonas putida fermentation broth and lichen Fermentation liquid of Bacillus cloacae, fermentation liquid of Enterobacter cloacae, fermentation liquid of Sporosporium thermophila and fermentation liquid of Bacillus cereus;

[0032] 2) The fermentation broth of Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae, Sporosporium thermophila and Bacillus cereus in a volume ratio of 4:4:3:2:2 Mix evenly to obtain a mixed fermentation liquid, and then concentrate to one-fifth of the original volume to obtain a concentrated bacterial liquid; the fermentation liquid of Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae The concentrations of the mold fermentatio...

Embodiment 2

[0037] A compound biological preparation, which is prepared according to the following process:

[0038] 1) Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae, Sporosporium thermophiles and Bacillus cereus were cultured on slant, shake flask seeds and fermenter respectively to obtain Pseudomonas putida fermentation broth and lichen Fermentation liquid of Bacillus cloacae, fermentation liquid of Enterobacter cloacae, fermentation liquid of Sporosporium thermophila and fermentation liquid of Bacillus cereus;

[0039] 2) The fermentation broth of Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae, Sporospora thermophilicus and Bacillus cereus in a volume ratio of 7:7:5:3:3 Mix evenly to obtain a mixed fermentation liquid, and then concentrate to one-fifth of the original volume to obtain a concentrated bacterial liquid; the fermentation liquid of Pseudomonas putida, Bacillus licheniformis, Enterobacter cloacae The concentrations of the mold fermentati...

Embodiment 3

[0044] The addition amount of composite biological preparation of the present invention in mercury-containing wastewater:

[0045] The wastewater treatment process includes the following steps: the mercury-containing wastewater is filtered and precipitated to remove large particles and flocs, and then the pH is adjusted to 6.8; then it enters the bioremediation tank, and the compound biological agent is added, and the treatment time is 72 hours.

[0046] Gradient test to determine the amount of compound biological preparations added:

[0047] Set two mercury concentration groups: Group 1: Hg 2+ The concentration is 30mg / L:, group 2: Hg 2+ The concentration is 60mg / L. Treatment process is with reference to embodiment 1; Mercury degradation rate=(Hg before processing 2+ Content - Hg after treatment 2+ content) / Hg before treatment 2+ Content × 100%. figure 1 In the experiment, the gradient test was set according to the addition amount of the compound biological agent per cu...

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Abstract

The invention belongs to the technical field of biology and discloses a compound biological preparation. A preparation method of the compound biological preparation includes the steps of firstly, culturing strains; secondly, evenly mixing and concentrating; thirdly, mixing, heating and stirring; fourthly, coating, crosslinking and drying. The compound biological preparation is reasonable in compatibility, strong in synergic effect, high in mercury degrading ability and capable of being used for treating mercury-containing wastewater.

Description

technical field [0001] The invention belongs to the field of biological technology, and in particular relates to a composite biological preparation and its application in treating mercury-containing wastewater. Background technique [0002] Mercury, commonly known as mercury, is the only liquid heavy metal element that exists under normal temperature and pressure conditions. Some people list mercury as one of the three most dangerous metal elements, and the U.S. Environmental Protection Agency lists mercury as one of 129 hazardous chemicals, mainly because of its high toxicity, persistence, bioaccumulation, and long-distance transmission specialty. The source of mercury in water is mainly due to the improper application of mercury treatment or the production of mercury mines, gold mines, chlor-alkali chemical plants, amalgam recovery of precious metals, non-ferrous metal smelters, pesticide factories, batteries, fluorescent tubes, and thermometers. , pharmaceuticals, cosme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C12N1/14C12N11/10C12N11/08C12N11/04C02F3/34C12R1/40C12R1/10C12R1/085C12R1/01C12R1/645C02F101/20
CPCC02F3/341C02F3/347C02F2101/20C12N1/14C12N1/20C12N11/04C12N11/08C12N11/10
Inventor 金文忠
Owner FUYANG HUAIBANG MACHINERY
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