FIELD: food industry.
SUBSTANCE: method involves girasol tubers milling, extraction and juice separation. Then obtained juice is subjected to sequential ultrafiltration on AP-2 semi-fibre filters with pores sized 1.2 - 1.8×10-6 m and AP-6 filters with pores sized 0.2 - 0.4×10-6 m. The produced concentrate with dry substances content equal to 20-22% is cleared on ion-exchange columns till inulin content in the concentrate is equal to 20-21%. Before extraction one performs pulp blanching at a temperature of 70±2°C during 15 minutes. Extraction with water is performed with usage of vibration impact, oscillation frequency f=6.6-23 Hz and amplitude A=5 mm during 30-60 min. According to the more preferable version, milled raw material mixing with water during extraction is performed with water duty equal to 1:4.
EFFECT: invention allows to increase inulin yield, reduce its colourity and decrease expenditures.
2 cl, 1 tbl, 3 ex
