Improvement of the technological procedure for starch isolation

Abstract

Starch is a very important, naturally renewable and relatively inexpensive raw material. Since the current industrial production establishes demands pertaining starch quality, a greater attention has been paid to development and improvement of existing technological procedures for starch isolation. This paper describes the following two procedures for starch isolation, developed and improved by our research: wet milling of maize bran and starch alkaline extraction from seeds of amaranth (Amaranthus cruentus). The implementation of maize bran wet milling into the existing technology of maize wet milling processing led to the total starch yield increase. In order to produce starch form seeds of amaranth different procedures of alkaline extraction and combined procedures of alkaline steeping and enzymic treatments have been used.

Skrob je veoma važan prirodno obnovljiv i relativno jevtin sirovinski materijal. Pošto moderna industrija postavlja odrešene zahteve u pogledu njegovog kvaliteta, razvoju novih i unapređenju postojećih tehnoloških postupaka za dobijanje škroba pridaje se sve veći značaj. U ovom radu su opisana dva, u našim istraživanjima razvijena i unapređena, postupka za dobijanje škroba: mokro mlevenje kukuruznih mekinja i alkalna ekstrakcija škroba iz semena vrste Amaranthus cruentus. Primenom mokrog mlevenja kukuruznih mekinja u postojeće tehnologije skrobarske prerade kukuruza postiže se povećanje ukupnog prinosa škroba. Za dobijanje škroba iz semena vrste Amaranthus cruentus primenjeni su različiti postupci alkalne ekstrakcije i kombinovani postupci alkalnog močenja i enzimskog tretmana.