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All Journal International Journal of Renewable Energy Development Abdimas Jurnal Bahan Alam Terbarukan Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Sainteknol : Jurnal Sains dan Teknologi OPSI Jurnal Aplikasi Teknologi Pangan Indonesian Journal of Chemistry Jurnal Pengabdian Magister Pendidikan IPA AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Teknologi Hasil Pertanian Jurnal Inovasi Teknik Kimia Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar ASEAN Journal of Chemical Engineering Jurnal Pengabdian Masyarakat Khatulistiwa BERNAS: Jurnal Pengabdian Kepada Masyarakat Dedikasi: Jurnal Pengabdian kepada Masyarakat Jurnal Teknik Kimia dan Lingkungan International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Abdimas Sainteknol : Jurnal Sains dan Teknologi Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Jurnal Puruhita
Ratna Dewi Kusumaningtyas
Universitas Negeri Semarang
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Neuroscience Nursing Public Health Social Sciences Veterinary Other

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Tin (II) Chloride Catalyzed Esterification of High FFA Jatropha Oil: Experimental and Kinetics Study Ratna Dewi Kusumaningtyas; Prima Astuti Handayani; Rochmadi Rochmadi; Suryo Purwono; Arief Budiman
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.75-81

Abstract

Biodiesel is one of the promising energy source alternatives to fossil fuel. To produce biodiesel in a more economical way, the employment of the low-cost feed stocks, such as non-edible oils with high free fatty acid (FFA), is necessary. Accordingly, the esterification reaction of FFA in vegetable oils plays an important role in the biodiesel production. In this work, esterification of FFA contained in Crude Jatropha Oil (CJO) in the presence of tin (II) chloride catalyst in a batch reactor has been carried out. The esterification reaction was conducted using methanol at the temperature of 40-60 °C for 4 hours. The effect of molar ratio of methanol to oil was studied in the range 15:1 to 120:1. The influence of catalyst loading was investigated in the range of 2.5 to 15% w/w oil. The optimum reaction conversion was obtained at 60 °C with the catalyst loading of 10% w/w oil and molar ratio of methanol to oil of 120:1. A pseudo-homogeneous reversible second order kinetic model for describing the esterification of FFA contained in CJO with methanol over tin (II) chloride catalyst was developed based on the experimental data. The kinetic model can fit the data very well.
Improving Clean and Healthy Living Behaviors Among Indonesian Migrant Workers in Malaysia Widya Hary Cahyati; Ratna Dewi Kusumaningtyas; Wandah Wibawanto; Annisa Putri Salsabila; Regina Marsha Nathaniela; Sultan Aulia Rahmat
Jurnal Abdimas Vol. 28 No. 1 (2024): June 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/3zwq9z73

Abstract

The Clean and Healthy Living Behavior Program (PHBS) is an effort to prevent disease by getting used to clean living and healthy behavior. PHBS is very important to be applied to the entire community, including Indonesian Migrant Workers (PMI). PMI live overseas, so health is very important. If they get sick, it will create new problems because access to health services is limited, and there is no family who can look after them. The solution offered to partners' problems is socialization regarding clean and healthy living habits, as well as how to get used to clean and healthy behavior. The development of a video about how to get used to living a clean and healthy life aims to increase the capacity of Indonesian migrant workers in Malaysia to get used to living a clean and healthy life, so that they can prevent disease attacks. The use of videos is intended to make socialization activities more effective. The Indonesian Embassy in Johor Bahru is a service partner, which will assist in bridging the service program that UNNES will carry out for PMI in the Johor Bahru Region. After conducting outreach to PMIs, the next step is to form several groups consisting of several PMIs to ensure the sustainability of the implementation of the PHBS program. The result of this activity is the availability of the PMI group as a forum for sharing and doing joint activities , as well as increasing knowledge and understanding about PHBS.
Synthesis of Biodegradable Bioplastic from Xanthan Gum (XCD) Recovered from Hi-Vis Sweep Waste Generated during Well Service Operations in Bunyu Field Dyta Silvia Mayasari; Widi Astuti; Ratna Dewi Kusumaningtyas; Dewi Selvia Fardhyanti
Sainteknol : Jurnal Sains dan Teknologi Vol. 24 No. `1 (2026): `June 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/sainteknol.v24i`1.54050

Abstract

Well service operations in the oil and gas industry utilize sweep fluids based on xanthan gum (XCD), which generate high-viscosity waste with the potential to cause environmental pollution. Due to its natural polymer characteristics, XCD waste has significant potential to be utilized as a raw material for biodegradable bioplastic production. This study aims to synthesize and characterize biodegradable bioplastics derived from XCD waste generated from Hi-Vis sweep operations during well service activities in Bunyu Field. The bioplastics were prepared using the solution casting method with variations in XCD concentration (1.0–2.0%), plasticizer type (glycerol and sorbitol), and plasticizer concentration (20–40%). The resulting bioplastics were characterized through film thickness, water absorption, and biodegradation rate tests. The experimental data were further analyzed using Response Surface Methodology (RSM) based on a Central Composite Design (CCD).The results showed that increasing plasticizer concentration enhanced both water absorption capacity and film flexibility. Bioplastics plasticized with glycerol exhibited a higher biodegradation rate compared to those containing sorbitol. These findings demonstrate that XCD waste from Hi-Vis sweep operations can be effectively valorized as an environmentally friendly raw material for biodegradable bioplastic production.
Co-Authors Achmad Bachtiar Agung Ari Wibowo Ahmad Afwan Fathoni Ajeng Riswanti Wulandari Akbar, Muhammad Hafizt Andri Cahyo Kumoro Annisa Putri Salsabila Anugrahani, Viona Widya Anwaruddin Hisyam Anwaruddin Hisyam Arief Budiman Arief Budiman Arief Budiman Ashroful In'am Atuzzuhro, Qoni' Ayu Fadilah Wahid Aza Putri Anisa Bachtiar, Achmad Bahlawan, Zuhriyan Ash Shiddieqy Barita, Asyera Dewi Bayu Triwibowo Cahya Wulandari Catur Rini Widyastuti Catur Rini Widyastuti, Catur Rini Chafidz, Achmad Daniel Setiyo Nugroho Daniel Setiyo Nugroho, Daniel Setiyo Dewi Selvia Fardhyanti Dewi Trisnani Dhoni Hartanto Dimas Rahadian Aji Muhammad Dody Herdian Saputra Riyadi Dody Herdian Saputra Riyadi Dwi Fibriyani Dwi Widjanarko Dyta Silvia Mayasari Evi Widowati Fathoni, Ahmad Afwan Fauzi, Dinda Adelia Fazlena Hamzah Fazlena Hamzah Fera Arinta Fidyawati, F Fitra Aulia Rahma H Hadiyanto Hadikawuryan, Danang Subarkah Hamzah, Fazlena Handri Rama Pradani Haniif Prasetiawan Hardi Suyitno Harumi Veny Harumi Veny Heri Yudiono I. Istadi Ichwan, Rizky Imam Novrizal Aji Imani, Nadya Alfa Cahaya Irene Nindita Pradnya Jannah, Reni Ainun Khoiroh, Ianatul Kun, Stefania Orance Kusuma, Andre Dianata Hogi Laila, Rachma Akmila Lestari, Yanesti Nur Avianda Loveyanto, Rendy Okta M Nasikin Maftukhaturrizqiyah, Maftukhaturrizqiyah Maksiola, Masni Megawati Megawati Mezaki, Naufal Mudrik Miradatul Najwa Muhd Rodhi Miradatul Najwa Muhd Rodhi Mohamad Nor, Nur Fatin Syafiqah Muhammad Aziz Muhammad Fikri Al Ghifari Muhammad Zarin Amin Zainal Muhd Rodhi, Miradatul Najwa Muslikhin Hidayat Mustofa Mustofa Mutaqin, Afrizal Mai Nadya Alfa Cahaya Imani Nana Kariada Trimartuti Nina Hartini Nina Hartini Nindita, Ariana Eka Nur Qudus Oktafiani Oktafiani, Oktafiani Oktafiani, Oktafiani Oktafiani, Oktafiani Pradnya, Irene Nindita Prima Astuti Handayani Purwana, Yulian Candra Putri, Silvia Nouvelia Putut Marwoto Rachmadi, Moch Faizal Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Rahmah, Aisyah Khalimatur Ramavi Akbar Akhsanul Fitrah Regina Marsha Nathaniela Reshita Amalia Ramadhani Reshita Amalia Ramadhani Ria Wulansarie, Ria Rini Kusumawardani, Rini Riza Mazidu Sholihin Rochmadi Rochmadi Rochmadi Rochmadi Rr. Dewi Artanti Putri, Rr. Dewi Artanti S Mursiti S., Syifa Azzahra Putri Sabirin Matsjeh Salsabila, Anida Santi Wijayanti, Dwi Gansar Sarina Sulaiman Sazali, Rozana Azrina Siti Salwa Azzahra Nurazizah Nuruljannah Sultan Aulia Rahmat Sunyoto Sunyoto Suryo Purwono Sutrisno, Akhmad Syah, Ahmad Faiz Armiano Syamrizal, Zakky Syarifatur Richana Syarifatur Richana Syifa Karimah Tyas Samesti Ummi Nur Laila Sulistyani Veny, Harumi Wandah Wibawanto Wara Dyah Pita Rengga Wicaksono, Dino Widi Astuti Widi Astuti Widya Hary Cahyati Wijayanti, Reni Titis Wulandari, Ajeng Riswanti Wulansari, Durroti Zuhriah Zakaria, Zainul Akmar