Bài viết Nghiên cứu chiết dầu và thu nhận đường từ bã cà phê trình bày khai thác những sản phẩm có giá trị như dầu và đường có hoạt tính sinh học từ bã cà phê, góp phần nâng cao hiệu quả kinh tế của ngành công nghiệp cà phê đồng thời góp phần giải quyết vấn đề ô nhiễm môi trường. | 28 Trường Đại học Nông Lâm TP. Hồ Chí Minh Evaluating the extraction of oil and sugars from spent coffee grounds Hanh M. Ho2 Ha L. N. Tran2 Truc T. T. Tran2 Anh T. V. Nguyen1 amp Ly T. P. Trinh1 2 3 1 Research Institute for Biotechnology and Environment Nong Lam University Ho Chi Minh City Vietnam 2 Department of Biotechnology Nong Lam University Ho Chi Minh City Vietnam 3 Khai Minh Technology Group Ho Chi Minh City Vietnam ARTICLE INFO ABSTRACT Research Paper About six million tons of spent coffee grounds are discharged into the envi- ronment every year. Spent coffee grounds contain many useful components Received January 09 2022 such as polysaccharides protein and bioactive compounds. This research aimed to exploit the important products such as coffee oil sugar and phe- Revised February 25 2022 nolic compounds from spent coffee grounds contributing to improve the Accepted February 27 2022 economic efficiency of the coffee industry and reducing the environmental pollution. Coffee oil was extracted using four different methods including maceration Soxhlet ultrasonic-assisted and microwave-assisted extrac- Keywords tion. The solid residue from the oil extraction process was hydrolyzed by Cellulast and Viscozyme enzyme. Monosaccharides total phenolic content Bioactive compounds and antioxidant activity in the hydrolysate were measured and evaluated. Coffee oil The results showed that ultrasonic-assisted extraction gave the highest Enzymatic hydrolysis yield of coffee oil of the coffee oil had a density of kg L the Mannose acid value of mg KOH g saponification value of mg KOH g Spent coffee grounds and ester value of mg KOH g. The highest enzymatic hydrolysis yield was obtained by using 2 Viscozyme within 24 h. The spent coffee ground hydrolysate contained mg L reducing sugars including mg L mannose mg L glucose and mg L galactose mg L to- Corresponding author tal phenolic content and showed the antioxidant .
