Method for producing selenium-rich quick-acting fertilizer by using dioscorea zingiberensis wastewater

A quick-acting fertilizer and wastewater technology, applied to fertilizers made from biological waste, application, nitrogen fertilizers, etc., can solve the problems of serious pollution, COD content below 100 mg/L, backward production technology, etc., and achieve simple operation and protection Safe water quality and low manufacturing cost

Pending Publication Date: 2021-10-22
湖北佰特克生物工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmental pollution problem caused by extracting diosgenin from turmeric has always been the bottleneck of the industry
However, due to the backward production technology, the traditional acid hydrolysis process produces a large amount of high-concentration strong acidic organic wastewater, which is seriously polluted. Turmeric, known as "medicinal gold", is also known as the "king of wastewater"
About 500 tons of strong acid wastewater will be produced for every ton of saponin produced. The COD concentration in the wastewater is about 32,000 mg / liter, and its pollution level is 12 times higher than that of papermaking wastewater. After treatment, the COD content in the wastewater can be reduced to 500 to 800 mg / L or so, but this is still far below the COD content of 100 mg / L stipulated in the first-level standard for the comprehensive discharge of corporate sewage

Method used

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  • Method for producing selenium-rich quick-acting fertilizer by using dioscorea zingiberensis wastewater
  • Method for producing selenium-rich quick-acting fertilizer by using dioscorea zingiberensis wastewater
  • Method for producing selenium-rich quick-acting fertilizer by using dioscorea zingiberensis wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 A kind of method utilizing yellow ginger waste water to produce selenium-enriched quick-acting fertilizer, its steps are as follows:

[0027] The first step: turmeric acid hydrolysis: add 50 kg of industrial hydrochloric acid and a certain volume of tap water to 1 ton of fresh turmeric, until pH = 1.0, the reaction temperature is 150 ° C, the pressure is 5 atmospheres, and the time is 2 hours. After the reaction is completed, filter to obtain turmeric 0.8 tons of waste water, about 0.1 tons of dry filter residue, which is used to extract diosgenin;

[0028] The second step: add 0.2 tons of phosphate rock powder and 0.1 tons of selenium-enriched wild rapeseed whole herb dry powder to the 0.8 tons of turmeric wastewater obtained in the first step, and react under high temperature and high pressure for 2 hours at a temperature of 150°C and a pressure of 5 atmospheres. After the reaction is completed Filter to obtain 0.6 tons of filtrate;

[0029] The third st...

Embodiment 2

[0040] Embodiment 2 A kind of method utilizing yellow ginger waste water to produce selenium-enriched quick-acting fertilizer, its steps are as follows:

[0041] The first step: turmeric acid hydrolysis: add 200 kg of industrial phosphoric acid and a certain volume of tap water to 1 ton of fresh turmeric, until pH = 1.2, the reaction temperature is 150 ° C, the pressure is 5 atmospheres, and the time is 2 hours. After the reaction is completed, filter to obtain 0.8 Ton of turmeric wastewater, about 0.1 ton of dry filter residue, used to extract diosgenin;

[0042] Second step: add 0.1 ton of selenium-enriched wild rape whole herb dry powder to 0.8 tons of turmeric waste water of first step gained, high temperature and high pressure reaction 2 hours, temperature 150 ℃, pressure 5 atmospheres, filter after completion of the reaction to obtain 0.75 tons of filtrate;

[0043] The third step: in the 0.75 tons of filtrate obtained in the second step, add potassium hydroxide, potassi...

Embodiment 3

[0049] Embodiment 3 A kind of method utilizing yellow ginger waste water to produce selenium-enriched quick-acting fertilizer, its steps are as follows:

[0050] The first step: turmeric acid hydrolysis: add 50 kg of industrial sulfuric acid and a certain volume of tap water to 1 ton of fresh turmeric, until pH = 1.0, the reaction temperature is 150 ° C, the pressure is 5 atmospheres, and the time is 2 hours. After the reaction is completed, filter to obtain 0.8 Ton of turmeric wastewater, about 0.1 ton of dry filter residue, used to extract diosgenin;

[0051] The second step: add 0.2 tons of phosphate rock powder and 0.1 tons of selenium-enriched wild rapeseed whole herb dry powder to the 0.8 tons of turmeric wastewater obtained in the first step, and react under high temperature and high pressure for 2 hours at a temperature of 150°C and a pressure of 5 atmospheres. After the reaction is completed Filter to obtain 0.7 tons of filtrate;

[0052] The third step: in the 0.7 t...

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Abstract

The invention relates to the technical field of chemical fertilizer production, and particularly discloses a method for producing a selenium-rich quick-acting fertilizer by using dioscorea zingiberensis wastewater. The method comprises the following steps: hydrolyzing dioscorea zingiberensis by using phosphoric acid, sulfuric acid, nitric acid or hydrochloric acid, filtering after hydrolysis to obtain hydrolysate, and extracting diosgenin from filter residues; carrying out a high-temperature and high-pressure reaction on dioscorea zingiberensis hydrolysate, a phosphorus source and a selenium source to generate phosphoric acid, various trace element soluble salts and seleno-amino acid; adding potassium hydroxide, potassium carbonate and ammonia water into the filtrate after the reaction to neutralize a reaction system; and adding sodium selenite and strontium chloride into the neutralized solution, and carrying out a stirring reaction to obtain the selenium-rich quick-acting liquid fertilizer. According to the technology, the dioscorea zingiberensis wastewater (namely the dioscorea zingiberensis hydrolysate) is fully utilized to produce the high-quality selenium-rich quick-acting fertilizer, so that the environmental protection problem is solved, and the selenium-rich quick-acting fertilizer is produced at low cost; and based on the price advantage and the quality advantage, the selenium-rich quick-acting fertilizer replaces the quick-acting fertilizer in the market.

Description

technical field [0001] The invention relates to the technical fields of medical chemical engineering and chemical fertilizer production, and more specifically to a method for producing selenium-enriched quick-acting fertilizer by using turmeric wastewater. Background technique [0002] At present, my country has formed three major turmeric industry bases: Ankang in Shaanxi, Shiyan in Hubei and Xiangxi in Hunan. The saponin is extracted by the traditional acid hydrolysis method. The environmental pollution caused by extracting diosgenin from turmeric has always been the bottleneck of the industry. At present, the main production process of turmeric saponin is: acid hydrolysis of turmeric dry powder→alkaline neutralization→drying→gasoline or petroleum ether reflux extraction→recovery solvent→crude diosgenin. Wherein the most critical is that the acid hydrolysis operation in this technology has not been solved so far, causes the destruction of a large amount of acidic organic...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05G5/20
CPCC05B17/00C05C3/00C05G5/20C05D1/00C05D9/00C05D9/02C05F5/004C05F11/00
Inventor 董静洲雷灿董珂
Owner 湖北佰特克生物工程有限公司
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