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Produksi Ekstrak Bioaktif Untuk Aditif Pangan Dari Limbah Kulit Buah Naga: Pengaruh Metode Pre-Treatment Dan Ekstraksi Shofinita, Dian; Bindar, Yazid; Jaelawijaya, Arwinda Aprillia; Harimawan, Ardiyan; Fawwaz, Mifta
Indonesian Journal of Chemical Research Vol 8 No 1 (2020): Edisi Bulan Mei (Edition for May)
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2020.8-dia

Abstract

Dragon fruit is one of the tropical fruits can be grown in Indonesia. The skin of dragon fruit, which is accounted for 30-35% of the whole fruit usually thrown away as waste. This study aims to produce a bioactive extract from extraction of dragon fruit skin that is rich in phenolic and pigment compounds then it used as food additives. The variation that was used in this study includes the application of drying as pre-treatment of dragon fruit skin and the extraction methods (maceration and Soxhlet extraction). The obtained extracts were evaluated for the amount of total phenolic compounds and pigments (anthocyanin and betacyanin). Drying of dragon fruit skin was found to yield lower amounts of bioactive materials, which may occur due to the thermal degradation even though a low drying temperature was used. In addition, the maceration method was found to give a higher amount of bioactive materials compared with the Soxhlet method. The extraction with the highest yield of bioactive materials was obtained by the use of fresh dragon fruit skin and maceration for 240 minutes, which gave amounts of anthocyanin, betacyanin, and total phenolic compounds of 0.08, 0.04, dan 0.35 mg/g fresh dragon fruit skin, respectively.
Perbedaan struktur molekul karet alam dengan proses termal koagulan berdasarkan analisis FTIR Achmad, Feerzet; Simbolon, Yusril Mahendra; Sinaga, Kristomi Yahya; Az-Zahra, Syifa; Yuniarti, Reni; Bindar, Yazid
Jurnal Rekayasa Proses Vol 19 No 1 (2025): Volume 19, Number 1, 2025
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.11875

Abstract

Rubber is one of the most potential and abundant biological natural resources in Indonesia. This research was conducted to determine the content of compounds contained in rubber after coagulation by means of thermal coagulants. There are 2 (two) thermal coagulants used, traditional using firewood and modern using a laboratory oven. Variations in the weight of the latex used were 0.5 kg, 0.75 kg, 1 kg, 1.25 kg and 1.5 kg. Then the results of the thermal coagulant were subjected to the Fourier Transform Infrared (FTIR) test to see the compound content contained in the rubber. The results of the FTIR test on traditional thermal coagulants at high and medium heat and modern thermal coagulants in the oven showed the typical functional groups of rubber, namely the presence of C-H, C=C and C-C carbon bonds.
Analysis of Bed Temperature on Circulated Fluidized Bed Boiler Using Simple Multivariable Regression Kurniawan, Asep; Kurniawan, Teguh; Alwan, Hafid; Bindar, Yazid; Irawan, Anton
ASEAN Journal for Science and Engineering in Materials Vol 3, No 2 (2024): AJSEM: Volume 3, Issue 2, September 2024
Publisher : Bumi Publikasi Nusantara

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Abstract

A Circulated Fluidized Bed (CFB) boiler is a type of steam boiler with more complex phenomena of fluidization and combustion occurring in the furnace. One of the operating problems is the temperature bed which is difficult to predict. Bed temperature prediction is important as a reference to know the combustion process and heat transfer along the furnace. The purpose of this study is multivariable data analysis to predict bed temperature based on historical data. The amount of historical data is then prepared for the dataset and passes through the stages of data cleansing, visualization, exploration, and engineering judgment. The parameters selected as control variables after going through the first principal analysis are 5 parameters, namely gross power, coal feed (X1), primary air (PA) flow (X2), secondary air (SA) flow (X3), and average bed temperature (y). The dataset is then divided based on the load into 2 groups a low load of 20.03-30.00 MW and a high load of 30.01-54.41 MW. Each parameter is converted to the natural logarithm (ln) then multivariable regression is performed. The result is a low load model equation  with Root Mean Square Error (RMSE) = 23.2813 and a high load model equation  with RMSE = 4.8416. This model can be used to predict the average bed temperature at certain input conditions of coal feed, PA flow, and SA flow according to operating load. Prospects for bed temperature prediction with this multivariable can be developed using data-based machine learning so that the operating patterns obtained are more accurate and real-time forecast prediction.
KAJIAN PROSES KOAGULASI LATEKS KARET ALAM SECARA TERMAL MEMBENTUK PRODUK PADAT CACAHAN Achmad, Feerzet; Simbolon, Yusril Mahendra; Sinaga, Kristomi Yahya; Yuniarti, Reni; Bindar, Yazid
Jurnal Penelitian Karet JPK : Volume 43, Nomor 1, Tahun 2025
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v43i1.945

Abstract

Karet alam adalah salah satu komoditi perkebunan yang memiliki peranan penting dalam hal perekonomian negara. Karet merupakan salah satu sumber daya alam hayati yang sangat potensial dan berlimpah di Indonesia. Penelitian ini bertujuan untuk mengetahui pengaruh termal koagulan terhadap proses koagulasi, waktu koagulasi, laju kalor yang digunakan untuk termal koagulan, dan analisis termal koagulan. Terdapat 2 termal koagulan yang digunakan yaitu termal koagulan secara tradisional (TKT) dengan menggunakan kayu bakar dan termal koagulan secara modern (TKM) dengan menggunakan oven laboratorium. Termal koagulan dilakukan dengan variasi berat lateks 0,5 kg, 0,75 kg, 1 kg, 1,25 kg, dan 1,5 kg pada temperatur TKT api sedang 600C – 1000C, temperatur api besar 1100C–1500C dan temperatur TKM 1450C. Hasil penelitian diperoleh termal koagulan dapat menggumpalkan lateks. Termal koagulan diperoleh waktu termal TKT lebih cepat dibandingkan dengan TKM. Kalor yang dihasilkan untuk TKM lebih besar dari kalor yang dihasilkan oleh TKT, dan semakin besar variasi berat lateks, semakin banyak kalor yang dihasilkan untuk koagulan termal. Laju kalor TKM lebih tinggi dibandingkan dengan laju kalor TKT, dan semakin besar nilai variasi berat lateks maka semakin rendah pemanasan yang dihasilkan. Koagulasi termal ini dapat membantu masyarakat petani karet untuk menggumpalkan lateks secara lebih ekonomis dan efisien, dan bahwa termal koagulan ini mengarah pada produksi karet sebagai bahan baku yang disimpan dalam bentuk padat untuk proses depolimerisasi dengan pirolisis menjadi bentuk hidrokarbon terbarukan.
Pemodelan Kinetika Pirolisis Biomassa Campuran Sekam Padi dan Tongkol Jagung Rosa, Vila; Bindar, Yazid; Restiawaty , Elvi
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 7 (2025): JURNAL LOCUS: Penelitian dan Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i7.4592

Abstract

Penelitian ini menyajikan pemodelan kinetika proses pirolisis cepat campuran biomassa sekam padi dan tongkol jagung untuk menghasilkan produk cair. Dengan semakin meningkatnya kekhawatiran tentang pemanasan global dan penipisan sumber daya energi fosil, sumber energi alternatif yang berkelanjutan dan ramah lingkungan semakin diperlukan. Biomassa, khususnya limbah pertanian, menawarkan solusi menjanjikan untuk produksi biofuel. Pirolisis adalah proses pemecahan termal yang terjadi tanpa oksigen, menghasilkan bio-crude oil, biochar, dan gas pirolisis. Untuk mengoptimalkan proses pirolisis dan hasilnya, pemahaman mendalam tentang mekanisme reaksi dan kinetikanya sangat penting. Penelitian ini menggunakan metode isokonversi model-bebas seperti Kissinger-Akahira-Sunose (KAS) dan Flynn-Wall-Ozawa (FWO) untuk analisis kinetika, memberikan wawasan tentang tahapan reaksi selama pirolisis. Temuan penelitian ini menunjukkan bahwa energi aktivasi (Ea) meningkat dengan tingginya derajat konversi, dengan campuran menunjukkan perilaku yang merupakan kombinasi aditif dari komponen-komponennya. Hasil ini sangat penting untuk desain dan optimasi reaktor pirolisis yang efisien serta kontribusinya terhadap pemanfaatan biomassa yang berkelanjutan.
Co-Authors . ELWINA . Elwina . Wusnah . Wusnah . YUNARD . Yunardi Abdullah Nur Aziz Abrar Riza, Abrar Achmad Roesyadi Agnes Cicilia Manopo Alwan, Hafid Anggraini, Sulistina Anton Irawan Aprilina Purbasari Ari Susandy Sanjaya, Ari Susandy Asep Bayu Dani Nandiyanto Asep Kurniawan Aslan, Christian Az-zahra, Syifa Azis Trianto Aziz Trianto Bakar, Muhammad Saifullah Abu Bayu Alamsari D. Santiani Darisman, Darisman Dwiwahdju Sasongko, Dwiwahdju Edy Suryadi Efri Mardawati Elfa Susanti Thamrin Elvi Restiawaty Endang Warsiki Fawwaz, Mifta Feerzet Achmad Fika Dwi Oktavia Fika Dwi Oktavia Harimawan, Ardiyan Herri Susanto I.G.B Ngurah Makertihartha Ika Amalia Kartika Ilham Maulana Indah Lestari Indah Lestari Jaelawijaya, Arwinda Aprillia Jaka Rukmana Luqman Buchori M. Dani Supardan M. Effendy M. Effendy M.T.A.P. Kresnowati Masduqi, Alif Lutfia Mohammad Effendy N. A. Sutrisniningrum Noezran Noezran Novi Sylvia Novy Pralisa Putri Nur Aini Parsaulian Siregar Pasymi, P. Pisey Hoeung Pujianti, Dina Rahmina, Fathya Renanto Handogo Reni Yuniarti Restiawaty , Elvi Rosa, Vila S. Subagjo S. Subagjo S. Subagjo Samuel Pati Senda Semuel Pati Senda Shofinita, Dian Silvia Oktavia Nur Yudiastuti Simbolon, Yusril Mahendra Sinaga, Kristomi Yahya Teguh Kurniawan Teguh Kurniawan Tita Rialita Tjokorde Walmiki Samadhi Vita Wonoputri Wahono Sumaryono Yogi W. Budhi Yogi Wibisono Budhi Yul Yunazwin Nazaruddin