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All Journal Jurnal Rekayasa Proses CHEMICA Jurnal Teknik Kimia Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat Jurnal Agro Industri Perkebunan Jurnal Rekayasa Proses STI Policy and Management Journal Jurnal Triton Altifani Journal: International Journal of Community Engagement Fruitset Sains : Jurnal Pertanian Agroteknologi Jurnal Pengelolaan Perkebunan (JPP) Jurnal Abdimas Lamin Jurnal Rekayasa Proses
Ratna Sri Harjanti
Politeknik LPP Yogyakarta
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Social Sciences Veterinary

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Kinetika reaksi heterogen etanolisis minyak jarak kepyar (Ricinus communis) dengan katalisator zeolit klinoptilolit Ratna Sri Harjanti; Sarto Sarto
Jurnal Rekayasa Proses Vol 3 No 1 (2009): Volume 3, Number 1, 2009
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.561

Abstract

Castor oil of Ricinus communis has potential as a raw material for biodiesel synthesis through catalytic alcoholysis process. Clinoptilolite type natural zeolite is one of solid catalysts that can be used in the alcoholysis process. In the present work, the alcoholysis was carried out in an autoclave reactor equipped with manometer, thermometer, sampling valve, and heating element. The reaction occurred at elevated temperatures with the use of clinoptilolite as a solid catalyst. The experimental data indicated that in a certain reaction time range, an increase in temperature and autoclave rotation speed lead to the increase of reaction conversion. Calculation results showed that the overall reaction rate was controlled by chemical reaction at the catalyst surface. The optimum condition of the alcoholysis process was obtained at reaction time of 60 minutes, temperature of 120C and autoclave rotation of 110 rpm with the use of alcohol-oil ratio of 12.56 mgek / mgek and 2.56% (w/w) catalyst. At the optimum condition, the conversion could reach as high as 0.73. The obtaining esters had a viscosity of 8.0 cst, -16.6°F pour point, 215°F flash point, ASTM color of 1, and heating value of 19,119 Btu/lb.
Pengaruh Kesegaran Tebu (Saccharum officinarum L.) pada Kualitas Gula Cetak Merah Harjanti, Ratna Sri; Hamami, Rahmi Sabrina; Kusumawati, Anna; Rizal, Azhari; Mustangin, Muhammad; Suryaningrum, Dwi Aryani; Yunaidi, Yunaidi
Jurnal Agro Industri Perkebunan Vol. 12 No. 1 (2024)
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jaip.v12i1.3384

Abstract

To maintain sugarcane freshness, it is crucial to process it promptly after harvest. This study aims to analyze the quality of molded brown sugar derived from raw materials with varying levels of freshness. The research adopts a non-factorial design involving three main treatments: the duration of stay on the first, second, and third days, with three replications. Parameters observed during the molded brown sugar production process include brix, pol, purity, and reducing sugar from raw juice; brix, pol, purity, and reducing sugar from clear juice; color, brix, moisture content, and reducing sugar of sugar. Data analysis is performed using analysis of variance (ANOVA) with the application of Duncan's multiple range test. The purity value in raw juice data H1 with a value of 89.54 significantly differs from data H3 with a value of 73.83. Similarly, reducing sugar in raw juice H1 at 0.74 significantly differs from H3 at 0.93. The purity value in clear juice H1 at 88.34 significantly differs from H3 at 75.40. As for reducing sugar in clear juice, H1 at 0.81 is significantly smaller than H3 at 1.18. Regarding the difference between open-pan and close-pan cooking treatments, it is concluded that the cooking system producing the best molded brown sugar is the close-pan system, evident in both color results and the reduced sugar content of molded brown sugar. The best color for molded brown sugar is found in treatment H1 (day 1) with the close-pan system at 551.40. The lowest reducing sugar content is observed in treatment H1 (day 1) with the close-pan system at 0.94.
Analisis Kesesuaian Lahan untuk Tanaman Tebu (Saccharum officinarum L.) di Desa Wedomartani, Kecamatan Ngemplak, Kabupaten Sleman Yogyakarta Mia Dwi Etafiana; Anna Kusumawati; Dwi Aryani Suryangingrum; Azhari Rizal; Muhammad Mustangin; Ratna Sri Harjanti; Yunaidi Yunaidi
JURNAL TRITON Vol 15 No 1 (2024): JURNAL TRITON
Publisher : Politeknik Pembangunan Pertanian Manokwari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47687/jt.v15i1.623

Abstract

Pemerintah menargetkan untuk peningkatan gula nasional adalah dengan cara perluasan areal tebu di Indonesia. Pencarian lahan baru sebagai usaha perluasan areal tebu harus diteliti sumberdaya lahannya agar berproduksi secara berkelanjutan. Tujuan dari penelitian ini yaitu mengidentifikasi kelas kesesuaian lahan secara spesifik bagi tanaman tebu di Desa Wedomartani agar dapat memberikan saran sesuai dengan hasil analisis kesesuaian lahan untuk pengelolaan lahan yang tepat. Penelitian ini dilakukan di bulan Juni-Juli 2023 di Desa Wedomartani dan Laboratorium Tanah dan Nutrisi Tanaman Universitas Muhammadiyah Yogyakarta. Pengambilan sampel dilakukan pada tiga titik lokasi di desa tersebut dengan menggunakan metode random sampling. Penentuan lokasi penelitian atau SPL didasarkan pada lahan yang ditanami tebu di Desa Wedomartani. Parameter yang diamati antara lain kondisi iklim, drainase, tekstur tanah, kedalaman tanah efektif, Kapasitas Tukar Kation (KTK), pH tanah, C-Organik, N Total, P Tersedia, K Tersedia, kemiringan lereng, bahaya erosi dan banjir serta volume singkapan batuan dan batuan permukaan. Hasil penelitian menunjukkan kondisi lahan di Wedomartani untuk kesesuaian lahan tanaman tebu yaitu S3rc dan S3na yang mempunyai faktor pembatas berupa tekstur tanah dan kurangnya P Tersedia. Perbaikan yang dapat dilakukan yaitu penambahan pupuk organik dan pupuk anorganik yang mempunyai unsur hara P.
Budidaya Tanaman Hortikultura dan Lumbung Pangan dalam Upaya Pemanfaatan Lahan Pekarangan di Kelurahan Klitren Yogyakarta Banowati, Galuh; Ekawati, Rina; Saputri, Lestari Hetalesi; Hartini, Hartini; Harjanti, Ratna Sri; Muningsih, Retno
Agrokreatif: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 1 (2024): Agrokreatif Jurnal Ilmiah Pengabdian Kepada Masyarakat
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrokreatif.10.1.23-32

Abstract

One of the characteristics of urban areas is the increasingly limited land that can be used for plant cultivation. Only now, a lot of yard land has yet to be utilized optimally, especially for cultivating vegetables. Klitren Village, in the center of Yogyakarta City, has community-owned yard land that can be used even though the area is limited. This service activity aims to maximize the use of yard land for cultivating vegetable plants, herbal gardens, and food storage. This service activity was carried out in Klitren Village at the Asoka Farming Women's Group (FWG) in July 2022. The service activity was attended by 81 people who were a combination of women members of Asoka's FWG, the Village Head of Klitren Village, Village Agricultural Extension Officers, Lecturers, Students, Research and Community Service Units, and the Klitren Village community from various. The service is carried out through several activities, including making planting media for cultivating vegetable plants, arranging herbal gardens, and providing food barns. 100% of the evaluation results stated that the activity participants knew how to make planting media and food storage. In comparison, 66.7% said they knew how to organize and maintain an herbal garden. 66.7% of the participant's responses to the activities indicated that they were helpful and hoped they could be sustainable and improved.
Co-Authors Andari, Yuni Anna Kusumawati Anna Kusumawati Arif Hidayat Azhari Rizal Azhari Rizal Bagaskara, Bagaskara Banowati, Galuh Budiansyah, Andi Dwi Aryani Suryangingrum Dwi Aryani Suryaningrum Dyah Puspasari, Dyah Fachrizal Fachrizal, Fachrizal Hamami, Rahmi Sabrina Hartini Hartini , dkk Helmi, Rahmi Lestari Kusumawati, Anna Maulana, Syahrizal Mia Dwi Etafiana Muhammad Mustangin Muhammad Mustangin Mundhir Muktafa Mustangin, Muhammad Purnomosidi, RY Kun Haribowo Rahmanta, Anugrah Perdana Retno Muningsih rina ekawati Rizal, Azhari Romadona, Mia Rahma Saputri, Lestari Hetalesi Sarto Sarto Sarto Shodiqin, Mohammad Sigit Setiawan Suryadi Suryadi Suryaningrum, Dwi Aryani Tsuraya, Silmi Yunaidi Yunaidi Yunaidi Yunaidi yunaidi yunaidi