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Preparation method of biochar-like matter used for heavy metal contaminated soil repair

A technology of polluted soil and biochar, applied in the direction of soil conditioning materials, chemical instruments and methods, applications, etc., can solve the problems of adsorption performance and stability limitations, limited surface adsorption sites, etc., and achieve the elimination of mobile pollution and soil fertility. Long-lasting and long-lasting effects that promote positive succession

Inactive Publication Date: 2015-02-25
上海玉仑应用微生物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, due to the certain distribution and surface adsorption of biochar, biochar is also gradually used as an adsorbent. However, the surface adsorption sites of biochar itself are very limited, so its adsorption performance and stability are greatly limited.

Method used

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  • Preparation method of biochar-like matter used for heavy metal contaminated soil repair

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Embodiment 1

[0029] A method for preparing biochar-like for remediation of heavy metal polluted soil, using the following steps:

[0030] (1) Raw material pretreatment:

[0031] a. Remove raw materials, including plastic, metal and bone impurities in animal and plant residues, vegetable waste or kitchen wet waste;

[0032] b. The primary sorted raw materials enter the crusher, and after crushing, the particle size of the raw materials is 2 to 3 cm;

[0033] c. The crushed material enters the press machine, and after being pressed, the moisture content of the material is 45% to 60%;

[0034] (2) Mixed inoculation of materials with bacterial liquid: use a mixer to stir, and mix the bacterial liquid and the pretreated raw materials evenly in a weight ratio of 1:1000. The bacterial liquid used is Bacillus cereus, adipose Bacillus and Aspergillus nidulans are composed of composite bacterial liquid according to the ratio of bacterial liquid volume of 1:1:1, and the bacterial content is 1-9×10 ...

Embodiment 2

[0043] A method for preparing biochar-like for remediation of heavy metal polluted soil, using the following steps:

[0044] (1) Raw material pretreatment:

[0045] a. Remove plastic, metal and bone impurities from animal and plant residues, vegetable farm waste or kitchen wet waste;

[0046] b. The primary sorted raw materials enter the crusher, and after crushing, the particle size of the raw materials is 2cm;

[0047] c. The crushed material enters the squeezer, and after being squeezed, the moisture content of the material is 45%;

[0048] (2) mixed inoculation of material bacterial liquid: use a mixer to stir, and the bacterial liquid and the pretreated raw material are mixed evenly in a ratio of 1: 1000 by weight. The bacterial liquid used in this embodiment is Bacillus cereus, Composite bacterial liquid composed of Geobacillus stearothermophilus and Aspergillus nidulans according to the ratio of bacterial liquid volume of 1:1:1, with a bacterial content of 1×10 12 pc...

Embodiment 3

[0054] A method for preparing biochar-like for remediation of heavy metal polluted soil, using the following steps:

[0055] (1) Raw material pretreatment:

[0056] a. Remove plastic, metal and bone impurities from animal and plant residues, vegetable farm waste or kitchen wet waste;

[0057] b. The primary sorted raw materials enter the crusher, and after crushing, the particle size of the raw materials is 3cm;

[0058] c. The crushed material enters the press machine, and after pressing, the moisture content of the material is 60%;

[0059] (2) mixed inoculation of material bacterial liquid: use a mixer to stir, and the bacterial liquid and the pretreated raw material are mixed evenly in a ratio of 1: 1000 by weight. The bacterial liquid used in this embodiment is Bacillus cereus, Composite bacterial liquid composed of Geobacillus stearothermophilus and Aspergillus nidulans according to the ratio of bacterial liquid volume of 1:1:1, with a bacterial content of 9×10 12 a / m...

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Abstract

The invention relates to a preparation method of a biochar-like matter used for heavy metal contaminated soil repair, the method includes pretreatment of raw materials, mixed inoculation of raw material bacteria liquid, low temperature pyrolysis and charring, crushing, screening and other steps, the biochar-like matter is prepared from one or more of plant and animal residues, food market garbage or kitchen wet waste as the raw materials, and compared with the existing technology such as replacement, electrokinetic remediation, complexation leaching, steam extraction, oxidation reduction electric mechanical repair and the like, the biochar-like matter adopts in-situ remediation technology, and has the advantages of low manufacturing and implementation cost, stability and the like.

Description

technical field [0001] The invention belongs to the field of biological fermentation, and in particular relates to a method for preparing biochar for remediation of heavy metal polluted soil. Background technique [0002] In my country, a large amount of biomass such as straw and rice husk is burned and wasted every year, which will not only bring pollution hazards to the environment, but also cause waste and loss of bio-energy. In recent years, with the gradual implementation of pyrolysis technology in my country, the recycling of waste biomass and energy regeneration have been realized. However, while renewable energy and chemicals are obtained through biomass pyrolysis technology, a large amount of by-product, biochar, is also produced. How to make full and reasonable use of biochar and how to turn waste into treasure is an urgent problem to be solved. So far, biochar has been widely used in agriculture, such as soil improvement and soil restoration. In addition, due to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C09K17/02
CPCB01J20/20B01J20/28004C09K17/04
Inventor 冯坤范
Owner 上海玉仑应用微生物研究所
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