Lactates are produced from lactic acid, a product derived from fermentation of natural carbohydrates, by adding an alkaline to a lactic acid solution. This results in an exothermic acid-alkaline reaction and will increase the temperature of the solution. The colour that is formed as a result of the temperature increase is removed using mobile filters filled with activated carbon.
Granular activated carbon (GAC) used in mobile adsorbers is a well-known technology used to remove colour from liquid solutions.
LACTATE PURIFICATION: MOBILE FILTERS
The AquaFlow™ V2 mobile adsorbers are designed and built to be suitable for use in the lactate production process. The filtration unit is a combined transport vessel and adsorption system delivered, prefilled with selected adsorbent media, to ensure cost effective purification results. The granular activated carbon arrives in a closed container ready for use and so the plant operators do not come into contact with either the fresh or saturated product.
LACTATE PURIFICATION: SOLUTIONS
Auxiliary equipment and additional services
In addition to mobile filters and different media, Jacobi Services also offers various items of auxiliary equipment and additional services, including:
Application specialists within the international Jacobi Service team can provide start-up assistance.
Isotherm testing with the user in order to compare the powdered activated carbon with granular activated carbon.
Recycling, Energy Recovery or Disposal Services
Jacobi Services offers customised reactivation ReSorb™ Solo where the spent carbon storage, reactivation and reactivated carbon conditioning are strictly separated from other customers to ensure that a customer gets their own activated carbon back.
Jacobi Services also offers spent carbon take back and virgin carbon delivery when the annual spent activated volume is too low for customised reactivation.
LACTATE PURIFICATION: PRODUCTS
ColorSorb™ H620 is a high purity, granular activated carbon, that is effective for decolourising a wide range of liquids, including foodstuffs and industrial process streams. The high mesoporosity also allows the effective removal of colour bodies and complex organic molecules and provides an excellent adsorption capacity. An important feature of this material is the supplementary washing process applied during production to reduce the level of soluble inorganics that may cause issues in acidic treatment applications. The product meets the requirements of the Food Chemical Codex. This product can be recycled by thermal reactivation, an environmentally responsible method that helps to reduce atmospheric CO₂ emissions and contributes to the sustainable use of the world’s resources.
LACTATE PURIFICATION: ION EXCHANGE RESINS
Resinex™ AD series
Several Resinex™ AD synthetic adsorbers can be used for decolourisation of food stuff together with activated carbon. Synthetic adsorbents are non-functionalised porous polymers with a styrenic or acrylic matrix. One of the major interests of synthetic adsorbers is that the adsorbed substances can be easily eluted from the matrix by using acid, caustic or organic solvent. The resin is then ready for a new service cycle. The most popular Resinex adsorbents in food processing are Resinex™ AD-3008, AD-3004 and AD-3300.
Resinex™ TPS strong base anions products can be used to remove colour in food stuff, such as cane sugar or liquid sugar. The chemical nature of the matrix and the porosity are different depending on the level of colour that needs removing. Resinex™ TPS-2207 is recommended for liquor below 200 ICUMSA, Resinex™ TPS-2300 or Resinex™ TPS-2308 for liquor between 200-800 ICUMSA, and Resinex™ TPS-2400 for liquor above 800 ICUMSA. Resins are regenerated using caustic brine or with a sucrose solution containing calcium hydroxide and chloride salts to minimise regeneration wastes.
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