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Sludge compost heavy metal passivation microbial agent as well as production method and application thereof

A heavy metal and bacterial agent technology, applied in the field of passivation bacterial agents, can solve the problems of the influence of attapulgite on the adsorption capacity, the poor microstructure of the carrier matrix, and the impact on the passivation effect of heavy metals, etc.

Active Publication Date: 2020-05-22
山西宁邦生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention claimed in this patent is to modify attapulgite loaded with iron. However, the modification step is only through surface activation and then iron-loading treatment. This method has a limited impact on the specific surface area of ​​attapulgite after calcination, and The ideal specific surface area cannot be obtained and has limited influence on the adsorption capacity of attapulgite
[0006] It can be seen that the passivating agent obtained by the current technology may have a complicated preparation process, or have the problem of poor microstructure of the carrier matrix obtained, which will affect the passivation effect of the passivating agent on heavy metals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of sludge composting heavy metal passivation bacterial agent, described passivation bacterial agent comprises by weight: heat desulfurization bacillus (Thermodesulfobacterium commune) YSRA-1 (DSM2178) 10%, bacillus 4%, modified biochar balance, Wherein the modified biochar includes 95% biochar and 5% nano silicon dioxide loaded in the pores of the biochar. Prepared as follows:

[0054] 1) drying and pulverizing the biomass material;

[0055] 2) Take the pulverized biomass material and heat it up to 500°C for anoxic carbonization for 0.5h, cool it, and grind it to get biochar. The pore size distribution of the biochar produced by testing is roughly, the micropores below 2nm account for 21%, 2- Small pores of 10nm accounted for 18%, mesopores of 10-30nm accounted for 41%, and large pores above 30nm accounted for 20%;

[0056] 3) Add the above-mentioned biochar into the mixed solution of tetraethyl orthosilicate and ethanol, stir evenly, heat up to 40°C, add the m...

Embodiment 2

[0066] A kind of sludge composting heavy metal passivation bacterial agent, described passivation bacterial agent comprises by weight: heat desulfurization bacillus (Thermodesulfobacterium commune) YSRA-1 (DSM2178) 14%, bacillus 6%, modified biochar balance, Wherein the modified biochar includes 92% biochar and 8% nano-silica loaded in the pores of the biochar. Prepared as follows:

[0067] 1) drying and pulverizing the biomass material;

[0068] 2) Take the pulverized biomass material and heat it up to 550°C for anoxic carbonization for 1 hour, cool it, grind it, and get biochar. The pore size distribution of the biochar produced by testing is roughly, the micropores below 2nm account for 15%, 2-10nm The small pores accounted for 14%, the 10-30nm medium pores accounted for 41%, and the large pores above 30nm accounted for 30%;

[0069] 3) Add the above-mentioned biochar into the mixed solution of tetraethyl orthosilicate and ethanol, stir evenly, heat up to 60°C, add the mi...

Embodiment 3

[0079] A kind of sludge composting heavy metal passivation bacterial agent, described passivation bacterial agent comprises by weight: Archaeoglobus fulgidus (Archaeoglobus fulgidus) VC 16 (DSM 4304) 13%, bacillus 5%, modified biochar balance , wherein the modified biochar includes 93% biochar and 7% nano-silica loaded in the pores of the biochar. Prepared as follows:

[0080] 1) drying and pulverizing the biomass material;

[0081] 2) Take the pulverized biomass material and heat it up to 530°C for anoxic carbonization for 1 hour, cool it, and grind it to obtain biochar. The pore size distribution of the biochar produced by testing is roughly, the micropores below 2nm account for 20%, 2-10nm The small pores accounted for 17%, the 10-30nm medium pores accounted for 39%, and the large pores above 30nm accounted for 24%;

[0082] 3) Add the above-mentioned biochar into the mixed solution of tetraethyl orthosilicate and ethanol, stir evenly, heat up to 60°C, add the mixed solut...

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Abstract

The invention provides a sludge compost heavy metal passivation microbial agent as well as a production method and application thereof. The passivation microbial agent comprises the following components in parts by weight: 10-16% of thermophilic sulfate reducing bacteria, and 4-6% of bacillus, with the balance being modified charcoal. The modified charcoal comprises 90 to 95 percent of charcoal and 5 to 10 percent of nano silicon dioxide loaded in pore channels of the charcoal; the average pore diameter of the modified charcoal is 6 to 9 nm; the specific surface area is 422-495 m<2> / g. In thesludge compost heavy metal passivation microbial agent obtained by the scheme, the fixation rate of microorganisms is 80-85%, the content of active heavy metal Cr is reduced by 85% or above, the amount of active Cu is reduced by 87% or above, and the amount of active Cd is reduced by 84% or above.

Description

technical field [0001] The invention relates to a passivation bacterial agent, its production method and application, in particular to a heavy metal passivation bacterial agent for sludge composting, its production method and application. Background technique [0002] Sludge is a complex aggregate, containing a large amount of pollutants, a small amount of pathogenic microorganisms, heavy metal ions and parasite eggs and other harmful substances. In particular, the content of heavy metals in industrial sewage is very high, and the proportion of industrial sewage is large. No edema treated by sewage plants has 70-90% of heavy metals transferred to sludge through precipitation or adsorption, and 85-95% of them will be attached to On the biological mass in the sludge, due to the poor mobility of heavy metals, when the sludge reaches the soil, most of the heavy metals will gather on the soil surface, and the heavy metals with good bioavailability will be absorbed by plants and e...

Claims

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Application Information

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IPC IPC(8): C05F17/20C05G3/00C05F11/08C12N1/20C12R1/01
CPCC05G3/00C05F11/08C12N1/20Y02W30/40
Inventor 李波余震杨飞
Owner 山西宁邦生物科技有限公司
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