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Method for utilizing waste water during production of stevioside

A technology of stevioside and waste water, which is applied in the preparation of sugar derivatives, sugar derivatives, and sugar derivatives. It can solve the problems of high cost and inability to use industrial production, and achieve the effects of reducing waste, protecting the environment, and saving costs.

Active Publication Date: 2012-08-29
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with the notification number CN 202038932 U proposes a stevioside production equipment capable of recovering acid and alkali waste water, which recycles acid and alkali waste liquid through a nanofiltration membrane; when the equipment recycles acid and alkali waste water, it has High cost, not suitable for industrial production, and waste water is only a shortcoming of simple recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The utilization method of waste water in the production of stevioside adopts the following process steps.

[0023] The acid wastewater from resin regeneration is adjusted to pH 6.5 by sodium hydroxide, and 100 kg of stevia leaves with a dry content of 9.6% are soaked in water with adjusted pH value, extracted twice to obtain 1500L extract, which is flocculated and filtered, and then applied to adsorption resin Adsorption is carried out, and after the adsorption resin is saturated, it is washed with deionized water of 4 times the column volume; the adsorbed resin after washing is analyzed with ethanol with a mass concentration of 72% to obtain an analysis solution; Acidic cationic resin 001×8 desalted, strongly basic anionic resin D285 decolorized; then desalted with weakly acidic cationic resin D152 and decolorized with weakly basic anionic resin D945 at a flow rate of 0.3 times the column volume per hour to obtain a stevioside solution; the stevioside solu...

Embodiment 2

[0024] Embodiment 2: The utilization method of waste water in the production of stevioside adopts the following process steps.

[0025] The alkaline waste water from resin regeneration is adjusted to pH 7.4 by hydrochloric acid, and 100 kg of stevia leaves with a dry content of 9.4% are soaked in water with adjusted pH value, extracted twice to obtain 1520L extract, which is flocculated and filtered, then applied to adsorption resin Adsorption, after the adsorption resin is saturated, rinse with deionized water of 7 times the column volume; the adsorbed resin after washing is analyzed with ethanol with a mass concentration of 76% to obtain the analysis solution; the analysis solution is too strong at 5 times the column volume per hour Acidic cationic resin 001×10 desalination, strong basic anion resin D280 decolorization; then at a flow rate of 0.8 times the column volume per hour, go through weak acidic cationic resin D150 desalination, weak basic anion resin 330 decolorizatio...

Embodiment 3

[0026] Embodiment 3: The utilization method of waste water in the production of stevioside adopts the following process steps.

[0027] The alkaline waste water from resin regeneration is adjusted to pH 7.2 by hydrochloric acid, 100 kg of stevia leaves with a dry content of 9.5% are soaked in water with adjusted pH value, extracted twice to obtain 1500L extract, and the extract is flocculated and filtered, then applied to adsorption resin for extraction Adsorption, after the adsorption resin is saturated, rinse with 3 times the column volume of deionized water; the rinsed adsorption resin is analyzed with ethanol with a mass concentration of 71% to obtain the analysis solution; the analysis solution is too strong at 6 times the column volume per hour Desalting with acidic cationic resin 001×16, decolorizing with strong basic anionic resin D280; desalting with weakly acidic cationic resin D151 and decolorizing with weakly basic anion resin D941 at a flow rate of 1 times the colu...

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Abstract

The invention discloses a method for utilizing waste water during production of stevioside. The method comprises the following process steps: (1) adjusting the pH value of acidic and alkaline waste water generated by resin regeneration to be 6 to 8 by using alkali or acid; (2) directly soaking stevia into the waste water with the pH value regulated to obtain extracting solution; (3) flocculating and filtering the extracting solution and adsorbing by using adsorption resin, washing the resin with water after adsorption; (4) analyzing the adsorption resin by using ethanol to obtain analytic solution; (5) desalinating the analytic solution by using strongly acidic cation resin for the first time and decoloring the analytic solution by using strongly alkaline anion resin for the first time; (6) desalinating the analytic solution by using weakly acidic cation resin for the second time and decoloring the analytic solution by using weakly alkaline anion resin for the second time to obtain stevioside solution; and (7) concentrating and spray-drying the stevioside solution to obtain the stevioside product. The method has the characteristics of water saving, environmental friendly, economy and low cost.

Description

technical field [0001] The invention relates to a method for reusing industrial waste water, in particular to a method for utilizing waste water in stevioside production. Background technique [0002] Stevioside is a new type of natural sweetener extracted from the Compositae herb Stevia rebaudiana, which has the characteristics of high sweetness and low calorie. Stevioside is the natural low-calorie sweetener that is closest to the taste of sucrose. Its sweetness is 200-400 times that of sucrose, but its calories are only 1 / 300 of sucrose; and it has no toxic side effects, no carcinogens, safe to eat, and can prevent High blood pressure, diabetes, obesity, heart disease and other diseases; can be widely used in food, beverage, medicine, cosmetics and other industries. [0003] At present, the main method of producing stevioside is the resin method, and its main process includes extraction, flocculation, filtration, pretreatment, adsorption, desalination, decolorization, co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C07H15/256C07H1/08
Inventor 卢庆国连运河田洪丁红梅牛志平
Owner CHENGUANG BIOTECH GRP CO LTD
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