Method and plant for purifying a carbohydrate rich liquid

摘要

Described is a method for preparing a purified liquid containing carbohydrates. The method comprises the steps of: hydrolysing starch to a dextrose equivalent (DE) of 10 or above, thus obtaining a liquid of carbohydrates; removing a heavy weight sludge fraction from the light weight liquid of carbohydrates using centrifugation; filtering the remaining liquid of carbohydrates, the filter being capable of retaining coarser particles while allowing particles with a diameter less than 2 μm to pass; performing membrane separation on the filtered liquid of carbohydrates using a membrane having a pore size at 2 μm or below; and recovering a permeate stream of purified liquid containing carbohydrates. Also disclosed in a plant for performing the method.

主权项

1. A method for preparing a purified liquid containing carbohydrates, comprising the steps of:
a) hydrolysing carbohydrates to a dextrose equivalent (DE) of 10 or above, thus obtaining a liquid of carbohydrates, b) removing a heavy weight sludge fraction from a light weight liquid of carbohydrates using centrifugation, c) filtering the remaining liquid of carbohydrates using a filter, the filter being capable of retaining coarser particles while allowing particles with a diameter of 2 μm to pass wherein the opening of the filter is selected according to a height of a flow channel of a membrane used in the subsequent step, d) performing membrane separation on the filtered liquid of carbohydrates using the membrane wherein the membrane has a pore size at 2 μm or below, and e) recovering a permeate stream of purified liquid containing carbohydrates.