Membrane Technology for Gardenia Yellow Pigment Purification & Concentration
Membrane separation technology offers a low-temperature, food-grade solution for gardenia yellow pigment refining. Combined with MF, UF and NF membranes, the process accomplishes clarification, impurity removal and concentration of crude gardenia extract in one integrated system. It effectively separates crocin from geniposide, pectin and macromolecular impurities, avoiding thermal damage to pigment active substances seen in traditional evaporation methods. The cross-flow tubular membrane equipment supports continuous production with convenient CIP cleaning, raising pigment recovery rate, improving color value and reducing energy and wastewater costs. It is an ideal technical upgrade for natural gardenia yellow manufacturers.
Nanofiltration Membrane for Organic Acid Concentration and Desalination
Organic acids represented by citric acid, lactic acid and gluconic acid are widely used in food additives, pharmaceutical raw materials and biodegradable polymer industries. Traditional purification routes rely on calcium salt precipitation, acidification and multi-effect evaporation, which bring high chemical consumption, heavy waste residue and high energy input. Nanofiltration, as a pressure-driven membrane process between ultrafiltration and reverse osmosis, possesses selective interception characteristics: it retains organic acid molecules while allowing monovalent inorganic ions to penetrate the membrane. This technology can realize simultaneous concentration and desalination of organic acid fermentation broth under low-temperature conditions, cutting down the consumption of lime and sulfuric acid, and reducing the burden of subsequent evaporation. This article elaborates the separation mechanism, system composition, operating parameters, fouling control and industrial applicatio
