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Mario, Abraham
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Engineering

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Optimizing Microwave-Assisted Extraction Parameters for Delignification of Water Hyacinth Stems Mario, Abraham; Fahira, Lala Firdha; Wulansari, Tiara; Amalia, Rizka
Journal of Vocational Studies on Applied Research Volume 6, Issue 2, Year 2024 (October 2024)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v6i2.24429

Abstract

Water hyacinth (Eichornia crassipes) is an aquatic plant that grows very quickly in Indonesian waters and is classified as an invasive weed, so it can cause ecological problems. Water hyacinth stems have a high cellulose content of 28-39%. Extraction of cellulose from water hyacinth needs to be done to remove lignin content. The microwave delignification method has the advantage of a rapid increase in temperature so that the extract yield is greater. This study aims to determine the optimal operating conditions in the delignification process of water hyacinth stems using the Microwave Assisted Extraction (MAE) method by examining the process variables: extraction time (5,10,15 minutes) and microwave power (400, 5000 and 600 watts). Based on the results of the study, the optimal operating conditions at a transmission time of 11.5 minutes and a transmission power of 530.5 watts, which were obtained in 20.25% of water hyacinth stems.
Nata De Coco Production with Addition of Antocyanin from Mangosteen Peel Extract Pratama, Irawan Adi; Amalia, Rizka; Mario, Abraham
Journal of Vocational Studies on Applied Research Volume 5, Issue 2, Year 2023 (October 2023)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v5i2.21822

Abstract

Mangosteen peel is rich antioxidant compounds which are very beneficial for human health and this potential is being utilized by the community. Mangosteen peel extract contains anthocyanin compounds. Anthocyanin are considered as active compounds whose consumption is associated with beneficial health effects. Nata de coco has many benefits for health, especially digestion, because of its high fiber content, low calories, and does not contain cholesterol. This research examines the optimum operating conditions of the nata de coco production process with the addition of mangosteen peel anthocyanin extract and the characteristics of the resulting nata de coco. This research study was carried out with various variables including: The ratio between mangosteen peel extract and coconut water (1:19 and 9:1 (v/v)), fermentation time 10 and 13 days), and Acetobacter xylinum volume (2,5% and 10%). During the research, the water content of the mangosteen peel was analyzed for yield and Total Anthocyanin Content. The result product were tested in thickness, weight, organoleptic, pH, crude fiber content, and Total Anthocyanin Content of Nata de Coco.
Co-Authors Fahira, Lala Firdha Pratama, Irawan Adi Rizka Amalia Wulansari, Tiara