Writer : Fakhira Rifanti M., S.T.
JATINANGOR, RH.SITH.ITB.AC.ID – The selection of Outstanding Student in 2018 from School of Life Sciences and Technology has ended in Wednesday, February 28th 2018. In this selection, Juang Arwafa Cita, as the representative from Biological Engineering major, presented his papers on “Coffee Cherry Skin Valorisation Into Cascara as an Effort to Escalate Coffee Farmer’s Income in Cibeusi Village”. This paper, which concern in Sustainable Development Goals, was one of the major factor that brought him to win as Main Outstanding Student of 2018 from School of Life Sciences and Technology, Bandung Institute of Technology (ITB).
This presentation itself based on community service program from professionalism division in Himpunan Mahasiswa Rekayasa Hayati (HMRH) ITB. Along with other biological engineering students, Juang researched on how to process the coffee cherry skin in order to increase coffee farmer’ income in Cibeusi Village. Through this paper, Juang showed that university students not only excellent academically and non-academically, but also capable to implement their knowledge for society, hence raising their income. Therefore, this article would review further about the community service program from HMRH ITB.
Cibeusi village is one of the coffee producer in Sumedang Regency, West Java. It is located 3 km north from Jatinangor Campus of ITB and became assisted village of HMRH ITB since 2013. Productivity estimation of coffee in this village is about 229 kg of coffee cherry/hectare/year, with the selling price of coffee cherry is only Rp 6,000 – Rp 7,000/kg. This low selling price certainly is the reason behind farmer’s low income, when actually coffee could be processed into higher value product.
Coffee Cherry Skin Into Cascara
In order to enhance coffee’s selling price, valorisation could be done where potential raw material that used to has low economic value (usually a by-product from processing system) processed into a beneficial product that has higher economic value. Coffee cherry consist of potential components that could be reprocessed, one of them is coffee cherry skin, which obtained from de-pulping process either by conventional pounder or automatic pulper machine. De-pulping process will separate coffee pulp, consist of cherry skin and coffee flesh, with green bean coffee. From 100 kg of cherry coffee, de-pulping process will produce 56.8 kg of coffee bean and 43.2 kg of coffee’s skin and flesh.
Coffee cherry skin that considered as waste actually has a lot of benefit. It has chlorogenate acid for about 2.6% of its dry weight, which is a phenolic compound that beneficial for human’s health as antioxidant. Besides that, coffee cherry skin could be processed into cascara, a herbal drink that has the same color and brewing method as tea. Cascara could be produced through drying process, with a selling price up to Rp 40,000/kg for ready to brew cascara. Another component of coffee, green bean coffee, has a selling price of Rp 23,000/kg, which three times higher than coffee cherry.
Drying process of coffee cherry skin into cascara should be investigated first to determine the most efficient method. Through construction model of experiment data, duration for drying of coffee cherry by oven should be 9.4 hours, while shade drying method needs about 53 hours for the coffee cherry. Since cascara production needs only a quite short drying time and has a simple method, it is very potential to implement it in Cibeusi Village. Moreover, packing process of cascara should be evaluated too. Dry cascara that already smoothly pounded will be put into a tea bag, so it will be easier to use. Tea bags with cascara could be repackaged inside a plastic clip to maintain the water content and quality.
Techno-economic analysis could be done to evaluate the impact of cascara production in Cibeusi Village. In conventional coffee production, coffee farmer only obtain Rp 1,374,000/hectare. Meanwhile, valorisation of waste from de-pulping process of coffee cherry, the coffee cherry skin, into cascara will produce 89.9 kg of green bean coffee and 28.4 kg of cascara, also escalate coffee farmer’s income into Rp 3,201,400/hectare, or about 233% of conventional method. Then, 89.8 kg of green bean coffee will also increase the income up to Rp 2,065,400/hectare.
Valorisation of coffee cherry skin into cascara could reduce the waste from coffee production and escalate the income of coffee farmer in Cibeusi Village. Through this escalation, it is expected that both standard of living and prosperity could be better for people in Cibeusi Village, in order to achieve the sustainable development.