Miftakhul Ulum, Fitriah Novita Sari, Helda Wika Amini, Hanggara Sudrajat

Extraction Method of Ultrasound-Assisted Extraction (UAE) of Robusta Coffee Skin Waste using 96% Ethanol Solution in Tanah Wulan Village, Maesan District, Bondowoso Regency

Introduction

Extraction method of ultrasound-assisted extraction (uae) of robusta coffee skin waste using 96% ethanol solution in tanah wulan village, maesan district, bondowoso regency. Discover the ultrasound-assisted extraction (UAE) method for robusta coffee skin waste using 96% ethanol in Tanah Wulan Village. Explore its potential for bioactive compounds and economic value.

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 done by extraction. 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.

Review

This manuscript introduces a promising study focused on the valorization of Robusta coffee skin waste, a significant by-product from coffee processing in the Argopuro Mountains region of East Java. The chosen subject addresses a relevant global challenge concerning agricultural waste management and the potential for extracting valuable bioactive compounds. The intent to utilize Ultrasound-Assisted Extraction (UAE) with 96% ethanol solution is timely, as UAE is recognized for its efficiency and environmental benefits compared to conventional methods. The abstract clearly establishes the geographical context and the underlying motivation to transform an underutilized waste stream into a product of economic value, setting a strong foundational premise for the research. However, the abstract primarily serves as an introduction to the *methodology* and *objectives* rather than a summary of the *findings*. While it correctly highlights UAE as a non-conventional method requiring shorter extraction times, it falls short in providing any concrete details about the study's outcomes. There is no mention of the specific bioactive compounds targeted or successfully isolated, nor any quantification of extraction yield, efficiency, or characterization of the extract. The statement "There is a lot of content in the coffee skin waste powder that needs further testing" further underscores that the abstract describes a preparatory stage or the motivation for the study, rather than its conclusive results. In its current form, the abstract functions more as a research proposal or a preliminary introduction to a study in progress. For a complete journal article, the abstract should succinctly summarize the *key results*, *major findings*, and *conclusions* drawn from the research, alongside the methodology. The statement that the "results of this study are expected to provide economic value" reinforces that the study's *actual* economic contribution or the successful isolation of high-value compounds is not yet presented. While the research direction is sound and relevant, a revised abstract would significantly benefit from including quantitative or qualitative data on the extracted compounds, extraction efficiency, or preliminary economic assessment to truly reflect the completed work.

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