Method for removing pesticide residue and heavy metal residue out of lentinan by using resin adsorption method

Abstract

The invention relates to the technical field of environmental protection, and particularly relates to a method for removing pesticide residue and heavy metal residue out of lentinan by using a resin adsorption method. The method is characterized in that a process route is as follows: mushroom selection, cleaning, extraction, passing through a resin column, filtration, concentration, alcohol precipitation, recovery of ethanol, spray drying of precipitate, mixing and sub-packaging; the technical data of final products are as follows: moisture is less than or equal to 5.0%, polysaccharide content is more than or equal to 50.0%, lead is less than or equal to 0.1ppm, cadmium is less than or equal to 0.1ppm, and mercury is less than or equal to 0.1ppm; pesticide residues: hexachloro-cyclohexane soprocide is less than or equal to 0.01ppm, quintozene is less than or equal to 0.01ppm, Dichlorodiphenyl Trichloroethane is less than or equal to 0.01ppm, ash content is less than or equal to 4.0%, and mesh number is more than or equal to 100; microbiological indicators: total bacterial count is less than or equal to 1000 / g, saccharomycetes are less than or equal to 50 / g, mildew is less than or equal to 50 / g, and pathogenic bacteria cannot be detected. The resin column uses HPD500 type adsorption resin. The spray drying temperatures are as follows: the inlet temperature is 205 DEG C, and the outlet temperature is 80 DEG C. By adopting the adsorption resin for removing harmful ingredients out of mushroom, the polysaccharide content is increased, the color, aroma and taste of the mushroom cannot be destroyed, and the product quality of polysaccharides is improved.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a resin adsorption method for removing lentinan pesticide residues and heavy metal residues. Background technique [0002] Edible and medicinal fungal polysaccharides are called "Biological Response Modifiers" (BRM for short), which exist in fungal hyphae, fruiting bodies and their fermentation broths, and are composed of more than 10 monosaccharides linked by glycosidic bonds. It is a high molecular polymer with complex biological activities and functions, the most important of which is immunomodulatory activity. At present, edible and medicinal fungal polysaccharides have been widely used in the clinical treatment of immunodeficiency diseases, autoimmune diseases and tumors. It has various pharmacological effects such as radiation and anti-ulcer, so it is called an important biological effect regulator. The study of edible and medicinal fungal polysaccharides...

AI Technical Summary

Problems solved by technology

Among them, mycelium fermentation cannot guarantee the original color and fragrance of shiitake mushrooms; while the content of polysaccharides processed by water extraction and alcohol precipitation process is low, it is difficult to ensure the quality of polysaccharides, and at the same time, it is impossible to remove heavy metals and pesticide residues in polysaccharides