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Method for removing heavy metals in traditional Chinese medicine residues

A technology of traditional Chinese medicine dregs and heavy metals, which is applied in the preparation of organic fertilizers, fertilizers made from biological wastes, applications, etc., can solve the problems of high treatment costs, secondary pollution, etc., achieve low cost, reduce environmental hazards, and reduce heavy metals. The effect of high removal rate

Pending Publication Date: 2021-02-05
TIANJIN UNIV OF TRADITIONAL CHINESE MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, heavy metal removal methods mainly include electrokinetic technology, chemical extraction, supercritical fluid extraction, plant extraction, etc., but these methods have problems such as high processing costs and possible secondary pollution.

Method used

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  • Method for removing heavy metals in traditional Chinese medicine residues
  • Method for removing heavy metals in traditional Chinese medicine residues
  • Method for removing heavy metals in traditional Chinese medicine residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]A method for removing heavy metals from traditional Chinese medicine slag, including the following steps:

[0042]Preparation of bacterial inoculum: Take 8 mL of anaerobic digested sludge from a municipal sewage treatment plant, add 1000 mL of nutrient solution, 20 g of starch, and anaerobic culture at 32°C for 18 days under sealed and stirring conditions to prepare an inoculum.

[0043]Preparation of traditional Chinese medicine residue: Take 2kg of traditional Chinese medicine residue from a pharmaceutical factory, and quantitatively detect and analyze the solid and liquid phase heavy metal content and chemical form distribution of the medicine residue, and then dry the traditional Chinese medicine residue and crush it to within 1.0cm.

[0044]Detection method of heavy metal content and chemical form distribution in solid and liquid phase of medicine residue: Take 0.25g of traditional Chinese medicine residue sample and add 2mL 30% hydrogen peroxide solution (H2O2), 6mL concentrated ...

Embodiment 2

[0049]A method for removing heavy metals from traditional Chinese medicine slag, including the following steps:

[0050]Preparation of bacterial inoculum: Take 8 mL of anaerobic digested sludge from a municipal sewage treatment plant, add 1000 mL of nutrient solution, 20 g of starch, and anaerobic culture at 31°C for 20 days under sealed and stirring conditions to prepare an inoculum.

[0051]Preparation of traditional Chinese medicine residue: Take 2kg of traditional Chinese medicine residue from a pharmaceutical factory, and quantitatively detect and analyze the solid and liquid phase heavy metal content and chemical form distribution of the medicine residue, and then dry the traditional Chinese medicine residue and crush it to within 1.0cm.

[0052]Detection method of heavy metal content and chemical form distribution in solid and liquid phase of medicine residue: Take 0.25g of traditional Chinese medicine residue sample and add 2mL 30% hydrogen peroxide solution (H2O2), 6mL concentrated ...

Embodiment 3

[0057]A method for removing heavy metals from traditional Chinese medicine slag, including the following steps:

[0058]Preparation of bacterial inoculum: Take 8 mL of anaerobic digested sludge from a municipal sewage treatment plant, add 1000 mL of nutrient solution, 20 g of starch, and under sealed and stirring conditions, anaerobic culture at 33°C for 19 days to prepare an inoculum.

[0059]Preparation of traditional Chinese medicine residue: Take 2kg of traditional Chinese medicine residue from a pharmaceutical factory, and quantitatively detect and analyze the solid and liquid phase heavy metal content and chemical form distribution of the medicine residue, and then dry the traditional Chinese medicine residue and crush it to within 1.0cm.

[0060]Detection method of heavy metal content and chemical form distribution in solid and liquid phase of medicine residue: Take 0.25g of traditional Chinese medicine residue sample and add 2mL 30% hydrogen peroxide solution (H2O2), 6mL concentrated...

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Abstract

The invention provides a method for removing heavy metals in traditional Chinese medicine residues, and belongs to the technical field of traditional Chinese medicine residue treatment, wherein the method comprises the following steps: 1) mixing the traditional Chinese medicine residues, sludge and water, and carrying out anaerobic fermentation for 30-50 days to obtain an anaerobic digestion material; and 2) inoculating thiobacillus ferrooxidans into the anaerobic digestion material, carrying out microbiological leaching culture for 8-12 days, carrying out solid-liquid separation, and collecting a solid-phase component, namely the traditional Chinese medicine residues with the heavy metals removed. According to the method, after the traditional Chinese medicine residues, sludge and water are mixed and subjected to anaerobic digestion, thiobacillus ferrooxidans is used for microbial leaching culture, direct action of the thiobacillus ferrooxidans or indirect action of metabolites of thethiobacillus ferrooxidans generates oxidation, reduction, complexation, adsorption, dissolution and other reactions, and the heavy metals are dissolved out from the solid phase of the medicine residues and enters a liquid phase; the purpose of removal of the heavy metals in traditional Chinese medicine residues is achieved by dehydration; the method is simple to operate, low in cost and high in heavy metal removal rate.

Description

Technical field[0001]The invention belongs to the technical field of traditional Chinese medicine slag treatment, and particularly relates to a method for removing heavy metals in traditional Chinese medicine slag.Background technique[0002]In recent years, with the country's strong support for China's pharmaceutical industry, Chinese medicine pharmaceutical companies have grown rapidly. At the same time, the annual emissions of Chinese medicine residues have also doubled. According to statistics, the annual discharge of traditional Chinese medicine residue reaches 30 million tons. Traditional Chinese medicine slag has many sources, such as the processing and processing of Chinese herbal medicines in hospitals and pharmacies, the production of Chinese patent medicines, the production of raw materials, the processing of Chinese medicinal materials, and the production of light chemical products containing Chinese medicines in Chinese medicine companies. Among them, Chinese medicines pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05F17/20C05F17/80
CPCC05F5/006C05F17/20C05F17/80C05G3/80C05F7/00C05F11/08Y02W30/40
Inventor 刘岩李正
Owner TIANJIN UNIV OF TRADITIONAL CHINESE MEDICINE