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All Journal Reaktor International Journal of Renewable Energy Development JMM (Jurnal Masyarakat Mandiri) AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar ASEAN Journal of Chemical Engineering Food ScienTech Journal Jurnal Pengabdian Masyarakat Khatulistiwa REACTOR : Journal of Research On Chemistry And Engineering Dedikasi: Jurnal Pengabdian kepada Masyarakat Journal of Industrial Community Empowerment International Journal of Renewable Energy Development Journal of Clean Technology Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Abdimas Sainteknol : Jurnal Sains dan Teknologi
Bahlawan, Zuhriyan Ash Shiddieqy
Department Of Chemical Engineering, Faculty Of Engineering, Universitas Negeri Semarang, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering 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 Public Health Social Sciences Other

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Optimizing Carica Waste Processing into Liquid Organic Fertilizer Using Bioconversion Techniques to Increase Agricultural Productivity in Kejajar District, Wonosobo Bahlawan, Zuhriyan Ash Shiddieqy; Megawati, Megawati; Pradnya, Irene Nindita; Damayanti, Astrilia; Permanadewi, Indrasukma; Zakia, Maulida
Journal of Clean Technology Vol. 3 No. 1 (2026): February 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/joct.v3i1.44800

Abstract

This community service program aims to optimize the use of Carica (Carica pubescens) waste into liquid organic fertilizer through bioconversion techniques, while simultaneously increasing the capacity of MSMEs and farmer groups in Kejajar District, Wonosobo. Activities include outreach, training, and mentoring in the production of liquid organic fertilizer on a household scale using simple technology based on decomposer microbes. The results of the community service show an increase in partners' knowledge and skills in Carica waste fermentation techniques, as well as in the production of liquid organic fertilizer with physical, chemical, and microbiological properties suitable for organic farming. Analysis shows decrease in pH and color changes, a distinctive fermentation odor, and increases in nutrient content (N, P, K), along with variations in substrate concentration. In addition, participants received mentoring on digital marketing strategies to increase the product's economic value. This program contributes to reducing Carica industrial waste, providing alternative organic fertilizers, and empowering local communities to improve welfare based on regional potential.
Physicochemical Characteristics of Ketapang (Terminalia catappa L.) Seed–Fortified Yogurt Astrilia Damayanti; Zuhriyan Ash Shiddieqy Bahlawan; Ima Winaningsih; Fitri Nur Kayati; Yessy Anna Pratiwi; Kakalia Putri Auralita; Anggun Enjelita; Calista Arsanti Ramadhani; Harsya Grezdipa Pratama; Ayasha Maharani; Muhammad Fadhlan Dzikri
Food ScienTech Journal Vol 8, No 1 (2026)
Publisher : University of Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33512/fsj.v8i1.35989

Abstract

Ketapang (Terminalia catappa L.) seeds are rich in protein and unsaturated fatty acids, making them a promising ingredient for fortifying functional dairy products. This study evaluated the effects of Ketapang seed fortification and starter culture concentrations on the physicochemical characteristics of yogurt. Yogurt was prepared with Ketapang seed milk at 0%, 10%, 15%, and 20% (v/v) and starter culture at 5%, 10%, 15%, and 20% (v/v), then stored at 4 ± 1 °C for 24 h to stabilize the gel structure before analysis. Protein, pH, syneresis, viscosity, and total solids were analyzed using standard methods, with data evaluated by two-way ANOVA and Tukey’s test (p < 0.01). Results showed that fortification significantly improved all parameters: protein increased from 5.67% (control) to 8.54% (20% seeds, 20% starter), total solids rose from 2.71% to 5.59%, viscosity increased nearly four-fold from 40.95 to 164.02 mPa·s, pH declined from 4.41 to 3.80, and syneresis decreased from 0.546 g/g to 0.109 g/g. The synergistic interaction between Ketapang proteins and lactic acid bacteria enhanced the composition, gel structure, and water-holding capacity of yogurt, resulting in firmer, more stable, and nutritionally enriched products. These findings highlight Ketapang seeds as a novel fortification material for the development of high-protein functional dairy products. This research supports Sustainable Development Goals (SDGs 2 and 3) and the national Asta Cita mission by optimizing underutilized local resources to enhance public nutrition.
Effect of Printing Speed on the Properties of 3D Printed Products Using Recycled PET Filament Deni Fajar Fitriyana; Agung Efriyo Hadi; Nugroho Suhodo; Aldias Bahatmaka; Januar Parlaungan Siregar; Tezara Cionita; Zuhriyan Ash Shiddieqy Bahlawan; Achmad Yanuar Maulana
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.2049

Abstract

Recycled PET has been widely studied for its potential use in 3D printing applications. However, few research has examined how printing speed affects recycled PET filament products' mechanical and physical qualities. This research examines how printing speed influences the physical and mechanical qualities of 3D-printed PET filament goods created from mineral water bottle trash. In this study, filament fabrication is carried out using the homemade pultrusion machine, then the filament is used for 3D printing with variations in printing speed (30, 45, and 60 mm/s). The conducted tests comprise density, tensile, hardness, and compressive testing to examine their physical and mechanical properties. This research found that 45 mm/s printing produced specimens with the maximum density, tensile strength, and hardness. The material reached a density of 0.968 g/cm³, tensile strength of 15.752 N/mm², and hardness of 43.50 Shore D under these circumstances. In contrast, specimens printed at 30 mm/s and 45 mm/s showed the greatest (10.841 N/mm²) and lowest (6.510 N/mm²) compressive strengths. The density, hardness, and tensile strength of 3D-printed specimens improved as the printing speed increased from 30 to 45 mm/s. Printing rates above 45 mm/s reduced specimen density, hardness, and tensile strength. This work promotes sustainable manufacturing by showing that recycled PET filament may be used for 3D printing and how printing speed affects material qualities, thereby promoting sustainable production practices and reduce dependence on virgin materials.
Co-Authors Abdurrafi, Faishol Achmad Wikandaru Achmad Yanuar Maulana Agung Efriyo Hadi Akhmad Sutrisno Aldias Bahatmaka Alfiansyah Aji Pratama Amrullah, Fauzan Anggun Enjelita Anggun Septiamurti Anggun Septiamurti Astrilia Damayanti Astrilia Damayanti Ayasha Maharani Ayu Nur Permadhini Bayu Triwibowo Bayu Triwibowo Calista Arsanti Ramadhani Catur Rini Widyastuti, Catur Rini Daffa Nur Muhammad Damayanti, Astrilia - Destantri, Fitri Wahyuningtyas Dewi, Yasinda Verrel Dinara Shinka Dhoni Hartanto Diana, Savira Rahma Dillah, Shohib Qomad Dwi Prasojo Dyta Silvia Mayasari Fahreza Pracenda Felicitia Fandika, Putri Maharani Adinda Fauzan Amrullah Fitri Nur Kayati Fitriyana, Deni Fajar Handoko, Pratama Senapati Bagus Hanif Ardhiansyah Haniif Prasetiawan Harianingsih, Harianingsih Harsya Grezdipa Pratama Hutomo , Gayuh Aditya Hutomo, Gayuh Aditya Ichwan, Rizky Ima Winaningsih Imani, Nadya Alfa Cahaya Imanullah, Kautsar Taqi Irene Nindita Pradnya Jannah, Reni Ainun Januar Parlaungan Siregar Kakalia Putri Auralita Karenina Hakim Khoridatus Sulwa Kristi, Silvia Yolanda Maharani Kusumaningrum Maulida Zakia Mayasari, Dyta Silvia Megawati Megawati - Megawati Megawati Megawati Megawati Megawati Megawati Megawati Megawati Muhammad Fadhlan Dzikri Muna, Mochammad Choiril Nabil, Nisrina Hasna’ Ninda Kurniadi Nugroho Suhodo Nurul Khusna Permanadewi, Indrasukma Pradiza, Zefanya Pradnya, Irene Nindita Pramitha, Deva Aurelya Prasetyo, Ridwan Anung Prasojo, Dwi Pratama, Alfiansyah Aji Pratama, Muhammad Herdi Pratiwi, Kharisma Ardhani Nur Prima Astuti Handayani Rachmadi, Moch Faizal Radenrara Dewi Artanti Putri Radenrara Dewi Artanti Putri Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Ratna Dewi Kusumaningtyas Ria Wulansarie, Ria S., Syifa Azzahra Putri Sadan, Serlia Fitri Salsabila, Luvena Septiamurti , Anggun Serlia Fitri Sadan Suwandi, Luluk Arvi Cahyaning Syahputra, Adhika Bintang Tezara Cionita Waliyuddin Sammadikun Wara Dyah Pita Rengga Wati, Afifah Sagita Fitria Yessy Anna Pratiwi Zain, Faatin Nisriinaa Zefanya Pradiza