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Method for preparing organic fertilizer from traditional Chinese medicine residues through physicochemical treatment

A technology of traditional Chinese medicine residue and organic fertilizer, which is applied to organic fertilizers, fertilizers made from biological wastes, fertilization devices, etc. high effect

Pending Publication Date: 2022-04-22
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the existing patented technology, the preparation of organic fertilizers from traditional Chinese medicine dregs by fermentation requires the addition of excipients or inoculation of bacteria agents, a long fermentation cycle and a large amount of CH 4 , CO 2 and other greenhouse gases, it is also difficult to achieve complete harmlessness and no waste emissions
However, if it is directly added as an auxiliary material, on the one hand, the addition ratio is small, which cannot meet a large number of resource utilization needs; on the other hand, without treatment, the crops cannot be fully utilized, and it may cause poisonous effects on the crops

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In terms of mass, take 20 parts of astragalus dregs, add 80 parts of water, use a basket ball mill to wet grind, and pass through a 200-mesh sieve. Transfer to the reaction kettle, add 5 parts of 10wt% nitric acid, stir until the system is uniform, rotate at 60r / min, raise the temperature to 50°C and keep it for 0.5h, and carry out oxidation treatment. Then add 10 parts of 30wt% sodium hydroxide solution, heat up to 133°C, pressure 0.3Mpa, control the stirring speed at 60r / min, react for 2h, after cooling, add 30wt% sulfuric acid to adjust the system pH to 6.5, filter and recover the solid matter, dry to a moisture content below 30%.

Embodiment 2

[0032] In terms of mass, take 25 parts of salvia miltiorrhiza slag, add 75 parts of water, use a basket ball mill to wet grind, and pass through a 200-mesh sieve. Transfer to the reaction kettle, add 10 parts of 30wt% hydrogen peroxide, stir until the system is uniform, rotate at 80r / min, raise the temperature to 80°C and keep it for 1h, and carry out oxidation treatment. Then add 10 parts of 30wt% potassium hydroxide solution, heat up to 140°C, pressure 0.4Mpa, control the stirring speed at 70r / min, react for 1.5h, after cooling, add 30wt% phosphoric acid to adjust the pH of the system to 6.0, filter and recover the solid matter, Dry to a moisture content below 30%.

Embodiment 3

[0034] In terms of mass, take 20 parts of corydalis slag, add 80 parts of water, use a basket ball mill to wet grind, and pass through a 200-mesh sieve. Transfer to the reaction kettle, add 2 parts of 30wt% hydrogen peroxide, stir until the system is uniform, rotate at 70r / min, raise the temperature to 70°C and keep it for 0.5h, and carry out oxidation treatment. Then add 5 parts of 30wt% sodium hydroxide solution, heat up to 140°C, pressure 0.4Mpa, control the stirring speed at 70r / min, react for 1.5h, after cooling, add 30wt% citric acid to adjust the pH of the system to 5.5, filter and recover the solid matter , dried to a moisture content below 30%.

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PUM

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Abstract

The method comprises the following steps: (1) weighing the traditional Chinese medicine residues, adding water, carrying out wet grinding and sieving, transferring into a reaction kettle, adding an oxidizing agent, uniformly stirring, and carrying out primary heating reaction; (2) continuously adding an alkaline reagent into the reaction kettle, and carrying out secondary heating reaction; and (3) after the reaction is completed, cooling, adjusting the pH value of the system, precipitating, filtering, recovering solid substances, and drying to obtain the organic fertilizer. Compared with the prior art, the process has the advantages of high efficiency, no need of additional auxiliary materials, low carbon, environmental protection and the like.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of solid waste, and relates to a method for preparing organic fertilizer from traditional Chinese medicine residue. Background technique [0002] Traditional Chinese medicine residues mainly come from the production of Chinese patent medicines, raw material medicines, processing and processing of Chinese medicinal materials, and the production of light chemical products containing traditional Chinese medicines. At present, my country produces a huge amount of waste residues of Chinese medicines. According to statistics, the annual production of Chinese herbal residues exceeds 35 million tons. With the rapid development of the Chinese medicine industry, while bringing huge economic benefits, the scientific utilization of Chinese medicine waste residues is an urgent problem for Chinese medicine companies to solve. Traditional Chinese medicine waste residue has high humidity and is not e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/80C05F5/00
CPCC05F5/006C05G3/80Y02A40/20
Inventor 曹卫宇祁瑞卢啸旸房朋奚世超黄焱孟亚利
Owner SHANGHAI RES INST OF CHEM IND
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