Magnetic biochar suitable for loading bacillus as well as preparation method and application of magnetic biochar

A technology of bacillus and biochar, applied in the field of biochar preparation and environmental protection, can solve the problems of difficulty in functioning, poor treatment effect, unfavorable secondary utilization, etc., to improve activity and quantity, facilitate adhesion and proliferation, and improve pore structure rich effect

Active Publication Date: 2020-05-29
湖南创清环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microbial treatment is a process of efficiently degrading harmful substances in wastewater by using cultured and domesticated wastewater degrading bacteria under suitable degradation conditions, thereby reducing the content of COD, BOD, etc. in wastewater, but microbial treatment still exists. Microbial activity and adaptability are low, and it is difficult to play a role in a heavily polluted environment; immobilized microbial remediation is a type of microbial remediation, which uses physical or chemical methods to fix free microorganisms in an area and maintain a high degree of enrichment and activity , to meet the application of biotechnology
Application number CN20160555834.8 proposes a method for preparing activated carbon loaded with microorganisms. The surface of activated carbon is loaded with 80% microorganisms, but the microorganisms are all loaded on the surface of activated carbon, which has poor mechanical strength and difficult recovery, which is not conducive to secondary utilization; application number CN20101082869.3 proposes a filler for carrying microorganisms, but the preparation cost of the microbial carrier filler is relatively high, and the filler will cause secondary pollution to the environment; the pH value of the above wastewater is low, within the range of 3-4, and the COD is relatively high but Phosphorus concentration is very low. Due to the low content of N and P in this kind of wastewater, the ratio of C, N and P to maintain the biological function is out of balance. C, N, P ratio to maintain the normal operation of the process
However, this method will not only increase the operating cost, but also if the dosage is insufficient, the treatment effect will be poor, and if the dosage is too large, the phosphorus content of the effluent will increase.

Method used

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  • Magnetic biochar suitable for loading bacillus as well as preparation method and application of magnetic biochar
  • Magnetic biochar suitable for loading bacillus as well as preparation method and application of magnetic biochar
  • Magnetic biochar suitable for loading bacillus as well as preparation method and application of magnetic biochar

Examples

Experimental program
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Effect test

Embodiment 1

[0036]Collect the corn cob, cut the corn cob into about 1cm flake structure with a knife, add the corn cob to the pre-prepared 20mL mixed solution at a mass volume ratio of 1:3g / mL (the solute of the mixed solution includes the following components: 20.0 mg of magnesium sulfate, 2.0 g of disodium hydrogen phosphate, 1.2 g of potassium dihydrogen phosphate, and 0.8 g of ammonium nitrate), shake on a shaker at 40° C. for 24 hours, carry out low-temperature structure penetration, and dry after shaking to obtain modified corncobs; Add water to the modified corn cob to make a concentration of 0.5g / mL, put it into a hydrothermal reaction kettle, and carbonize it in an oven at 180°C for 5 hours to prepare biochar, wash it with distilled water until it is neutral, and then dry it. Ratio 1:30mL was added to 50wt% ferric chloride solution for activation treatment, the mixture was shaken on a shaker at room temperature for 24 hours to carry out structure penetration, after shaking, it was...

Embodiment 2

[0045] Collect the corn cob, cut the corn cob into about 1cm flake structure with a knife, add the corn cob to the pre-prepared 20mL mixed solution at a mass volume ratio of 1:4g / mL (the solute of the mixed solution includes the following components: 25.0 mg of magnesium sulfate, 2.5 g of disodium hydrogen phosphate, 1.5 g of potassium dihydrogen phosphate, and 1.0 g of ammonium nitrate), shake on a shaker at 70° C. for 20 hours, carry out low-temperature structure penetration, and dry after shaking to obtain modified corncobs; Add water to the modified corn cob to make a concentration of 0.5g / mL, put it into a hydrothermal reactor, and carbonize it in an oven at 250°C for 5 hours to prepare biochar, wash it with distilled water until it is neutral, and then dry it. Ratio 1:40mL was added to 50wt% ferric chloride solution for activation treatment, the mixture was shaken on a shaker at room temperature for 24 hours to carry out structure penetration, after shaking, it was dried ...

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Abstract

The invention discloses a preparation method of magnetic biochar suitable for loading bacillus. The method includes the following steps: (1) adding corncobs into a mixed solution, performing shaking on a shaker at 40-70 DEG C for structural infiltration, performing drying to obtain modified corncobs, and performing hydrothermal carbonization to prepare biochar for standby application; and (2) mixing the biochar and a soluble iron salt solution, performing shaking at room temperature on a shaker for structural infiltration, performing drying to obtain modified biochar, and performing roasting at high temperature in a weakly oxidizing atmosphere to obtain the magnetic biochar. The method uses the corncobs as raw materials, the corncobs are subjected to low-temperature mixed infiltration through the mixed solution containing a plurality of microelements, high-temperature hydrothermal carbonization is performed, power provided by two-stage evaporation of moisture is used to enrich the porestructure of the biochar, the microelements penetrate into pores to be retained, the obtained biochar with a rich pore structure and rich nutrient elements is infiltrated by the soluble iron salt, and roasting is performed in the protective atmosphere to obtain the magnetic biochar.

Description

technical field [0001] The invention belongs to the technical field of biochar preparation and environmental protection, and relates to a magnetic biochar suitable for carrying bacillus, a preparation method thereof and an application in wastewater purification. Background technique [0002] In my country, the wastewater from agricultural and sideline product processing industry, food processing industry and beverage manufacturing industry accounts for about 10%. There is a continuous increasing trend, and discharge into rivers will pollute water bodies, cause severe eutrophication of water bodies, and lead to red tides and other phenomena. Microbial treatment is a process of efficiently degrading harmful substances in wastewater by using cultured and domesticated wastewater degrading bacteria under suitable degradation conditions, thereby reducing the content of COD, BOD, etc. in wastewater, but microbial treatment still exists. Microbial activity and adaptability are low, ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C12N11/14C01B32/05C02F3/34C12R1/07C02F103/32
CPCC12N11/14C01B32/05C02F3/34C02F2103/325
Inventor周南徐凤娟雷继雨粟一峰周智
Owner湖南创清环境技术有限公司