Cocoa (Theobroma cacao) is one of the commodity crops in different ecological regions from the Mekong Delta to the Central Highlands of Vietnam. The high content of cellulose present in the pod is strongly considerable for the hydrolysis process by diluting acid into fermentable sugar. The aim of this study was to investigate the fermentation capacity from hydrolysate of cocoa pods. The hydrolysate was prepared with HCl 0.75M at 90°C in 8 hours. The cocoa pod hydrolysate (glucose concentration was 7.22% w/v) was examined for the ability of bio-ethanol production by four strains of Saccharomyces cerevisiae (YB3K, VVD3, BKD4, 2.1) with the initial inoculation levels at 102, 104, 106, 107 cells/mL. The fermenting medium was tested with the glucose content in a range of 4, 5, 6, and 7% (w/v) and pH value at 4.5, 5.0, 5.5 and 6.0. The fermentation conditions were designed at different temperatures (25, 30, 37°C) and times (3, 5, 7 and 9 days). The finding results showed that the suitable yeast strain for ethanol fermentation was Saccharomyces cerevisiae VVD3 with the inoculation level at 106 cells/mL. The ethanol concentration of 5.14% was achieved when fermenting cocoa pod hydrolysate for 7 days at 30°C and pH at 5.5. The glucose consumption efficiency could be able to reach up 97.6%. These outputs indicated the promising feasibility of ethanol production from such waste material source of cocoa pods.
Phong, H.X., Quan, P.T., Thanh, N.N. and Dung, N.T.P., 2016. Study on fermentation conditions for bioethanol production from cocoa pod hydrolysate. Can Tho University Journal of Science. Special issue: Renewable Energy: 1-6.
Huỳnh Xuân Phong, Hà Thanh Toàn, Ngô Thị Phương Dung, Huỳnh Ngọc Thanh Tâm, 2007. KHẢO SÁT CHẤT LƯỢNG MEN LÀM RƯỢU VÀ RƯỢU XUÂN THẠNH. Tạp chí Khoa học Trường Đại học Cần Thơ. 07: 121-129
Phong, H.X., Giang, N.T.C., Nitiyon, S., Yamada, M., Thanonkeo, P. and Dung, N.T.P., 2016. Ethanol production from molasses at high temperature by thermotolerant yeasts isolated from cocoa. Can Tho University Journal of Science. Vol 3: 32-37.
Trích dẫn: Huỳnh Xuân Phong, Danh Minh Lợi, Nguyễn Ngọc Thạnh, Lê Phan Đình Quí, Bùi Hoàng Đăng Long, Pornthap Thanonkeo, Mamoru Yamada và Ngô Thị Phương Dung, 2017. Tuyển chọn nấm men chịu nhiệt và nghiên cứu điều kiện lên men rượu vang khóm. Tạp chí Khoa học Trường Đại học Cần Thơ. 51b: 7-15.
Tạp chí: The Final Joint Seminar on Establishment of an international research core for bio-research fields with microbes from tropical areas; Yamaguchi University Japan; 2nd – 4th December 2018
Tạp chí: The 3rd International Postgraduate Symposium on Food, Agriculture and Biotechnology in ASEAN (IPSFAB2016). Mahasarakham University, Mahasarakham, Thailand. 7-8 September 2016
Tạp chí: 11th Young Scientist Seminar on "Establishment of International Research Network for Tropical Bioresources and Their Utilization". Yamaguchi Prefectural Seminar Park, Yamaguchi, Japan. 16th – 17th November, 2015
Tạp chí khoa học Trường Đại học Cần Thơ
Lầu 4, Nhà Điều Hành, Khu II, đường 3/2, P. Xuân Khánh, Q. Ninh Kiều, TP. Cần Thơ
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