Miftakhul Ulum
Department of Chemical Engineering, University of Jember, Indonesia 68121

Fitriah Novita Sari
SMA Ra'iyaul Husna Bondowoso, Indonesia

Helda Wika Amini
Department of Chemical Engineering, University of Jember, Indonesia 68121

Hanggara Sudrajat
National Research and Innovation Agency (BRIN), Indonesia

DOI:https://doi.org/10.19184/jobc.v2i2.270         

ABSTRACT
Argopuro Mountains, Tanah Wulan Village, Maesan District, Bondowoso Regency, East Java, Indonesia, is one of the Robusta coffee-producing areas. Robusta coffee beans that are processed can produce quite a lot of by-products in the form of underutilized waste. It is known that coffee skin waste still has a lot of remaining content, and it is possible to take these bioactive compounds using extraction methods. Bioactive compounds in natural materials can be extracted. Extraction is the process of separating substances in a sample based on different solubilities. The extraction method used is the ultrasonication method (nonconventional). Extraction of the ultrasonication method only requires a relatively shorter time with the help of an ultrasonicator. There is a lot of content in the coffee skin waste powder that needs further testing. The results of this study are expected to provide economic value to robusta coffee husk waste.

Keywords: coffee husk waste powder, ultrasonication

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