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Preparation method and application of magnetic biochar

A biochar and magnetic technology, applied in the field of magnetic biochar preparation, can solve the problems of easy deactivation, easy loss, and high production cost of exogenous additives, and achieve the effects of low cost, convenient recycling, and favorable reuse

Pending Publication Date: 2022-03-25
CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, the present invention provides a preparation method of magnetic biochar and its application in enhanced anaerobic process. The preparation method uses straw and scrap iron to prepare magnetic biochar, which solves the problem of exogenous additives. Problems of high production cost, easy inactivation, and easy loss, and at the same time can better improve the anaerobic effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for magnetic biochar, comprising the steps of:

[0024] S1, crushing the biological straw, washing it repeatedly with acid and water after sieving, and drying it;

[0025] S2. After cleaning the waste iron filings with water, add acid to dissolve to obtain a reaction solution; the mass volume ratio of the waste iron filings to the acid is 1:2;

[0026] S3. Add the dried biological stalks in step 1 into the reaction solution, the mass volume of the biological stalks and the reaction solution is 1:2, after fully stirring, transfer to a hydrothermal reaction kettle for hydrothermal reaction, the The reaction temperature of the hydrothermal reaction is 180°C, the reaction time is 8h, and the reacted product is sieved to obtain a solid product;

[0027] S4. The solid product is washed several times with ethanol solution, and dried at 105° C. to obtain magnetic biochar.

[0028] Add 2L of a certain pesticide wastewater with a COD concentration of 1700-1...

Embodiment 2

[0030] A preparation method for magnetic biochar, comprising the steps of:

[0031] S1, crushing the biological straw, washing it repeatedly with acid and water after sieving, and drying it;

[0032] S2. After washing the waste iron filings with water, add acid to dissolve to obtain a reaction liquid; the mass volume ratio of the waste iron filings to the acid is 1:3;

[0033] S3. Add the dried biological stalks in step 1 into the reaction solution, the mass volume of the biological stalks and the reaction solution is 3:2, and after fully stirring, transfer it to a hydrothermal reaction kettle for hydrothermal reaction. The reaction temperature of the hydrothermal reaction is 220°C, the reaction time is 6h, and the reacted product is sieved to obtain a solid product;

[0034] S4. The solid product is washed several times with ethanol solution, and dried at 105° C. to obtain magnetic biochar.

[0035] Add 2L of a certain coal gasification wastewater with a COD concentration o...

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Abstract

The invention provides a preparation method of magnetic biochar. The preparation method comprises the following steps: crushing biological straws, sieving, cleaning and drying; after the waste iron scraps are cleaned, acid is added for dissolution, and a reaction solution is obtained; adding the dried biological straw into the reaction liquid, fully stirring, carrying out hydrothermal reaction, and sieving the reacted product to obtain a solid product; and washing the solid product with an organic solution for several times, and drying to obtain the magnetic biochar. According to the method, the magnetic biochar is prepared from the straw and the scrap iron, so that the problems that an exogenous additive is high in preparation cost and easy to inactivate and lose are solved, and meanwhile, the anaerobic effect can be well improved.

Description

technical field [0001] The invention relates to the technical field of magnetic biochar, in particular to a preparation method and application of magnetic biochar. Background technique [0002] Anaerobic digestion technology is the current mainstream biochemical degradation process that can guarantee energy and energy from high-concentration organic matter. During the process of degrading pollutants and solid waste, this technology converts pollutants from liquid to harmless gas. , and is further recycled. Subsequently, the remaining and valuable inorganic salts in the remaining digested product can be recovered and reused multiple times. More importantly, the anaerobic digestion process has brought considerable economic benefits and social benefits to many people's livelihood fields due to its advantages such as wide application range, low operating energy consumption, high operating load, less residual sludge, and low nutrient requirements. benefits and environmental ben...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 刘汉飞朱昊季雨凡李双涛
Owner CHINA CONSTR IND & ENERGY ENG GRP CO LTD
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