Study on the influence of the so-called filtration enzyme action on the membrane filtration process of wheat starch hydrolysates

Starch hydrolysates were prepared by enzymatic hydrolysis with a -amylase and mixture of glucoamylase and pullulanase. Additionally the so-called filtration enzyme action (lysophospholipase) was introduced for starch hydrolysates production. Enzymatic hydrolysates were purified on filtration unit (Amicon) equipped with polysulfonic membrane with molecular cut-off size 10 kDa. The comparison of the filterability for the starch hydrolysates obtained by the use of the so-called filtration enzyme action or without its action was carried. Properties of feed and permeate (content of proteins, colour substances and transmittance value) were evaluated. The results indicated that the additional action of the so-called filtration enzyme in production of starch hydrolysates was influenced on the increase of filtration rate but was not effected on quality of filtrates.

Although microfiltration of wheat starch hydrolysates is a difficult process, it can be improved to some degree by application of socalled filtration enzymes. The result proved that the use of lysophospholipase has profitable influence on their filtration rate of wheat starch hydrolysates and improve their quality, namely their proteins and colour compounds are reduced.