A comprehensive water-saving process for stevioside production

A stevia sugar and process technology, which is applied in the field of comprehensive water-saving technology for stevia sugar production, can solve the problems of high operating cost, incomplete removal of impurities, unfavorable environment, etc., and achieves improvement of purity and yield, production value, and water consumption. reduced effect

Active Publication Date: 2019-12-10
CHENGUANG BIOTECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the process of resin regeneration, a large amount of acid, alkali and flushing water are required, which is also one of the reasons for the consumption of stevioside production water.
The Chinese patent with the publication number CN201210130567.1 proposes a method of adjusting the pH of the acid-base wastewater produced by resin regeneration and then directly using it for stevioside extraction. The treated water contains a large amount of salt, pigments, colloids and other impurities. , which is detrimental to the normal production process and product quality of stevioside
The Chinese patent with the publication number CN201610660108.2 proposes a method for extracting stevioside after treating the adsorbed column water with a flocculant. On the one hand, this method needs to add new chemicals, and the daily operation cost is high and it is not good for the environment. On the other hand, the removal of impurities in the next column water is not thorough, and it also has adverse effects on the normal production of stevioside and product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Present embodiment stevioside production comprehensive water-saving technique is as follows:

[0021] (1) Stevia sugar extraction: 50 tons of stevia leaves (10% steviol glycoside content, 1.5% chlorogenic acid content, 0.4% flavonoid content) were extracted with 800 tons of water, flocculated and precipitated with 50 tons of flocculant solution, filtered (cleaning the plate frame After being treated with 250 tons of water, enter the adsorption resin column for adsorption, collect 1150 tons of lower column water, desorb the steviol glycosides adsorbed by the adsorption resin column, desalt, decolorize, concentrate, and spray dry to obtain 5 tons of stevioside products (purity 90%, ash content 1 %);

[0022] (2) Purification of lower column water: Collect 700 tons of lower column water with COD≤5000mg / L into the acid-base adjustment tank, adjust the pH to 6, and filter through 1000-mesh bag filter, 0.1μmPP folded filter element, and 5nm ceramic membrane Filtration, after...

Embodiment 2

[0027] Present embodiment stevioside production comprehensive water-saving technique is as follows:

[0028] (1) Stevia sugar extraction: 50 tons of stevia leaves (10% steviol glycoside content, 1.5% chlorogenic acid content, 0.4% flavonoid content) were extracted with 800 tons of water, flocculated and precipitated with 50 tons of flocculant solution, filtered (cleaning the plate frame After being treated with 250 tons of water, enter the adsorption resin column for adsorption, collect 1150 tons of lower column water, desorb the steviol glycosides adsorbed by the adsorption resin column, desalt, decolorize, concentrate, and spray dry to obtain 5 tons of stevioside products (purity 90%, ash content 1 %);

[0029] (2) Purification of lower column water: collect 700 tons of lower column water with COD≤5000mg / L into the acid-base adjustment tank, adjust the pH to 7, and then filter through a 500-mesh bag filter, 0.5μmPP folded filter element, and 50nm ceramic membrane Filtration...

Embodiment 3

[0034] Present embodiment stevioside production comprehensive water-saving technique is as follows:

[0035](1) Stevia sugar extraction: 50 tons of stevia leaves (10% steviol glycoside content, 1.5% chlorogenic acid content, 0.4% flavonoid content) were extracted with 800 tons of water, flocculated and precipitated with 50 tons of flocculant solution, filtered (cleaning the plate frame After being treated with 250 tons of water, enter the adsorption resin column for adsorption, collect 1150 tons of lower column water, desorb the steviol glycosides adsorbed by the adsorption resin column, desalt, decolorize, concentrate, and spray dry to obtain 5 tons of stevioside products (purity 90%, ash content 1 %);

[0036] (2) Purification of lower column water: Collect 700 tons of lower column water with COD≤5000mg / L into the acid-base adjustment pool, adjust the pH to 8, and filter through 300-mesh bag filter, 10μmPP melt-blown filter element, and 100nm ceramic membrane Filtration, af...

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PUM

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Abstract

The invention discloses a comprehensive water-saving process for producing stevioside. Down-column water generated in a resin adsorption step is subjected to purification treatment and a waste acid, a waste alkali and waste water, which are generated in an adsorption resin and desalting and decolorizing resin regeneration step are subjected to treatment, in the production procedure of the stevioside. According to the comprehensive water-saving process, a water extracting solution of a stevia leaf is subjected to resin adsorption; down-column waste water is subjected to rough filtration, primary filtration, ceramic film filtration, resin adsorption treatment, ozone treatment, adsorption filtration and reverse osmosis treatment in sequence to obtain purifier water which is directly used for the water extraction of the stevia leaf; abundant waste acid, waste alkali and waste water, which are produced in a resin regeneration procedure, are recycled; a water consumption is decreased by 70 percent or above; an acid consumption and an alkali consumption are decreased by 60 percent or above; meanwhile, by-products flavone and chlorogenic acid are obtained. According to the comprehensive water-saving process, a new pollutant does not be generated; no new chemical reagents are put; the quality of treated water is high; part of indexes are superior to those of underground water and municipal water; the ash content of a stevioside product can be decreased; the improvement of the purity and the yield of the product is facilitated; the industrial production value of the stevioside is improved.

Description

technical field [0001] The invention belongs to the technical field of natural plant extraction, and in particular relates to a comprehensive water-saving process for stevioside production. Background technique [0002] Stevia is a dicotyledonous plant, native to South America, and introduced in my country in the early 1980s. The leaves of stevia rebaudiana contain 6-12% steviol glycosides, which have been used to extract stevioside. Stevioside is currently the only pure natural, high-intensity sweetener known as "the third sugar source in the world". It has the advantages of low calorific value, safety and health care, and has a very broad development prospect. [0003] However, the production of stevia sugar consumes extremely serious water resources. Generally speaking, a production line that processes 40 tons of stevia leaves per day consumes more than 1,000 cubic meters of water per day. In today's increasingly severe environmental protection situation, the developmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/256C07H1/08C02F9/04C02F103/36
CPCC02F1/001C02F1/283C02F1/44C02F1/441C02F1/50C02F9/00C02F2103/36C07H1/08C07H15/256Y02A20/131
Inventor 韩文杰袁新英张俊强刘新朝李崇达
Owner CHENGUANG BIOTECH GRP CO LTD
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