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Pengaruh Lama Perendaman Buah dan Fermentasi terhadap Warna Kulit Tanduk dan Citarasa Kopi Robusta Khalimatus Sa'diyah; Usman Ahmad; Sukrisno Widyotomo; Yusianto Yusianto
Jurnal Tanaman Industri dan Penyegar Vol 6, No 1 (2019): Jurnal Tanaman Industri dan Penyegar
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jtidp.v6n1.2019.p33-40

Abstract

Pulping and fermentation of coffee cherry determine the quality of green beans and coffee flavors. Delay in pulping will cause the slime stick to the hull skin hence decreasing the bean quality and flavor. The objective of this study was to examine the effect of soaking before pulping and fermentation time to the color of coffee hull skin and the cup quality. The research was carried out at the experimental station of Indonesian Coffee and Cocoa Research Institute in Malang Regency (ICCRI) and ICCRI laboratory in Jember Regency from July 2018 to January 2019. Experiments used factorial completely randomized design. The first factor was cherry soaking duration (0, 24, 48, and 72 hours) and the second factor was fermentation duration (0, 24, and 48 hours) and then combined into 12 treatments, with three replications. Ten kilograms of coffee cherries were soaked prior to pulping then fermented in a plastic bag and added with Lactobacillus casei 2,5 x 107 cfu/ml as starter.  Parameters observed were color of hull skin (L value, a*, dan b*) and the cup quality.  The results showed that soaking the cherry decreased the green beans quality which is indicated by less brightness (L), high a* value, and decreasing b* value of hull skin color. While the fermentation treatment can increase the value of L, decrease the a* value, and increase the b* value. The interaction of treatment of soaking and fermentation time significantly affected the lightnessl a* and b* value. Soaking and fermentation treatments did not significantly affect to the flavor, salt/acid, balance, and total score of coffee flavor. Soaking is not recommended for more than 48 hours and fermentation should be carried out 48 hours.
CHARACTERIZATION OF ROBUSTA COFFEE (Coffea canephora) FROM TULUNGREJO FERMENTED WITH Saccharomyces cerevisiae Dionesius Budi; Wahyu Mushollaeni; Yusianto Yusianto; Atina Rahmawati
Jurnal Agroindustri Vol. 10 No. 2 (2020)
Publisher : BPFP Faperta UNIB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/j.agroindustri.10.2.129-138

Abstract

Robusta coffee (Coffea canephora) is one type of coffee that is cultivated by the people of Tulungrejo Village, Malang Regency. Until now, the coffee is still sold fresh or dry, because this coffee has a bitter taste and is quite acid so that if it is made into a grounded coffee and consuming it with a high enough frequency it will cause an increase in stomach acid. The presence of caffeine, as well as several types of secondary metabolites, caused the bitter and sour taste in Robusta coffee. Therefore, need a process that is easy, inexpensive, and can be directly applied by the community to reduce levels of caffeine and acid. Fermentation using Saccharomyces cerevisiae yeast is one of the stages of the processing of agricultural products that are most often carried out by the community. However, the effect of fermentation of Robusta coffee from Tulungrejo using S. cerevisiae has never been studied to reduce its acid content. Therefore, this study aimed to obtain the best yeast concentration and fermentation time in making Robusta ground coffee from Tulungrejo so that the acid content was in line with ground coffee standards. The best treatment was obtained by adding 2% yeast with 10 hours of fermentation time. This treatment produces ground coffee which has a pH of 5.275; water content 1.75%; ash content 4.81%; and caffeine content of 5.6055 mg/ml. The levels of caffeine and pH had met SNI 1-3542-2004 standards
Co-Authors Atina Rahmawati Dionesius Budi Khalimatus Sa'diyah Sukrisno Widyotomo Usman Ahmad Wahyu Mushollaeni