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The Extraction of Lactic Acid from Fermentative Marigold Wastewater


The Extraction of Lactic Acid from Fermentative Marigold Wastewater 【Abstract】 As a natural yellow pigment, lutein is widely used in the human food and forage. A lot of wastewater is generate

d in this industry. It is urgent to deal with fermentative marigold wstewater for lutein industry. How to process the wastewatwer is more important. Centre on the process of fermentative marigold wstewater, used by polyaluminium chloride to flocculate, active carbon to bleach, then evaporating in the vacuum state and getting lactic acid finally. 【Key words】Marigold; Lutein; Lactic acid; Wastewater 0 Introduction Marigold is an herb of ancient medicinal repute. It grows as a wild and common garden plant throughout Europe, North America and Asia.[1] Lutein has been reported in epidemiological studies that lutein reduces the risk of some chronic diseases such as cancer, heart disease and age-related eye diseases.[2]A lot of wastewater is generated during the extraction of lutein from marigold process. lactic acid ,which contained in the wastewater, is widely used in food additives, feed sour agents and nutritional supplements.[3] 1 Materials and methods 1.1 Materials Fermentative marigold wastewater come (Heilongjiang Leader Bio-technology Co.,Ltd) Lactic acid(Content 80%-95%) , Active carbon, Polyaluminium chloride, Ca(OH)2(content≥93%) , H3PO4(AR) , N-butyl alcohol(AR) , Isopropyl ether( AR) , chloroform( AR) 1.2 Methods 1.2.1 Organic solvent extraction method Wastewater , of which the pH

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