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All Journal PROSIDING SEMINAR NASIONAL Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Prosiding Seminar Nasional Unimus
Ayu Rahmawati Sulistyaningtyas
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Education Engineering Environmental Science Health Professions Immunology & microbiology Nursing Public Health

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Journal : PROSIDING SEMINAR NASIONAL

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PENTINGNYA PENGOLAHAN BASAH (WET PROCESSING) BUAH KOPI ROBUSTA (Coffea robusta Lindl.ex.de.Will) UNTUK MENURUNKAN RESIKO KECACATAN BIJI HIJAU SAAT COFFEE GRADING Ayu Rahmawati Sulistyaningtyas
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2017: Prosiding Seminar Nasional Publikasi Hasil-Hasil Penelitian dan Pengabdian Masyarakat
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Coffee plant (Coffea.sp) is one of the main commodities in Indonesia. The types of arabica coffee (Coffea arabica) androbusta coffee (Coffea robusta) are the most widely cultivated species. In Indonesia, coffee plantations began to grow rapidly so that potential for the development of domestic coffee. The development of the people's coffee plant required support of various factors such as availability of facilities, methods of processing and postharvest handling which suitable for the coffee plantations to produce quality coffee beans according to Indonesian National Standard (SNI).Coffee fruit should be handled quickly into a more stable form to be safe to store for a certain period of time. The seedquality criteria covering physical aspect, taste and hygiene and uniformity and consistency aspect is determined by thetreatment at each stage of production process. The result of overview study showed that  the handling of harvest, postharvest and coffee processing at farmers level should be done effectively and efficiently. During pulping process, coffee skin has exfoliated from their fruit. This process caused grean bean rubbing against pulper tools. So, wet processing may potentially reduced a risk of defect robusta green beans. In conclusion, wet processing robusta fruit (Coffea robusta Lindl.Ex.De.Will) is important to reduce the risk of green seed defects during coffee grading process.Keywords: Coffea, robusta, biji,pengolahan,basah, resiko, cacat
PHOTOCATALYTIC DEGRADATION Cr (VI) BY ZSM-5 IMPREGNATED TiO2 IN VARIOUS UV-IRRADIATION TIME Faridah Faridah; Ana Hidayati Mukaromah; Ayu Rahmawati Sulistyaningtyas
PROSIDING SEMINAR NASIONAL & INTERNASIONAL 2018: SEMINAR NASIONAL PENDIDIKAN SAINS DAN TEKNOLOGI
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Chromium is considered as one of the most common ubiquitous pollutants in aquatic environment. There were qualities standard about Chromium content in drinking water and fresh water. Oxidation of Chromium were Cr (II), Cr (III) and Cr (VI).  Among these, Cr (VI) is considered as the most toxic form because it readily passes cellular membranes and then reduced to Cr (III). TiO2    as catalyst can activated and modified zeolites with active metal materials i.e ZSM-5 impregnated TiO2. Main objective of study was to determine decreased percentage of Cr (VI) in water by using ZSM-5 impregnated TiO2  based on UV irradiation time. This study was used Completely Randomized Design i.e length of UV irradiation. Result  showed Cr (VI) content was decreasing with various length  of  UV  irradiation  in  15;30;45;60;75  minutes,  respectively  is  17.01; 17.99; 18.99; 28,73; 36, 20%. The highest percentage decrease of Cr (VI) ion content during 75 minute UV irradiation is 39,42%. Chromium (VI) content could be solved with zeolite ZSM-5 impregnated TiO2  by using photocatalytic method. In conclusion, the longer UV   irradiation time caused higher of decreased percentage Cr (VI). Keywords: Chromium,  Photocatalytic, Zeolite, Impregnated
Co-Authors Adela Kartikasari Ana Hidayati Mukaromah Faridah Faridah Insannul Kurniasari Mella Aprilia Muhammad Evy Prastiyanto Nurrahman Nurrahman Sri Darmawati Sri Sinto Dewi Stalis Norma Ethica Wikanastri Hersoelistyorini Yuni Nurkuntari