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
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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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