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All Journal Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Prosiding Semnastek KOVALEN: Jurnal Riset Kimia Chimica et Natura Acta FLUIDA Indonesian Journal of Chemical Analysis (IJCA) J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Fullerene Journal of Chemistry Equilibrium Journal of Chemical Engineering REACTOR : Journal of Research On Chemistry And Engineering Industrial Research Workshop and National Seminar
Mentik Hulupi
Jurusan Teknik Kimia, Politeknik Negeri Bandung
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Other

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Journal : FLUIDA

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EM4 Effect on Macronutrients and Microbial Growth in Liquid Organic Fertilizer from Cibogo Market Waste Widyabudiningsih, Dewi; Rinaldi, Kardian; Firdaus, Fachrel Muhammad; Fauzi, Rafli Rizki; Hulupi, Mentik
Fluida Vol. 18 No. 1 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i1.6050

Abstract

Waste represents a major environmental concern due to its contribution to pollution. According to the Ministry of Environment and Forestry, organic waste comprised 51.63% of total waste in Indonesia. This highlights the potential for converting organic waste into liquid organic fertilizer (LOF) through anaerobic fermentation. This study aimed to determine the relationship between macronutrient content and microbial growth in LOF and to determine the optimum fermentation time for producing LOF. LOF was made using organic waste from Cibogo market, including green vegetable waste and fruit peels banana, mango, and pineapple). The research was conducted using reactor which contained 5 kg of green vegetable waste and 5 kg of fruit peels, supplemented with EM4 bioactivator (200, 250, and 300 mL), water, and brown sugar. Samples were analyzed on days 0, 7, 14, 21, and 28. Chemical parameters measured included nitrogen, phosphorus, C-organic, and potassium content, and microbial analysis was conducted to determine the role of microorganisms in the fermentation process. Results showed that the optimal fermentation time for LOF production was seven days, corresponding to the peak concentrations of NPK and C-organic. However, further optimization of EM4 volume and the ratio between waste and bioactivator is required, since the nutrient levels remain below the recommended standard. Moreover, the correlation between microbial population and nutrient availability requires further research, particularly with respect to the quantity of EM4 applied.
Sintesis dan Karakterisasi SiO2@C dari Sekam Padi Sebagai Anoda Baterai Litium: - Suryadi, Joko; Andrijanto, Eko; Hulupi, Mentik; Salsabilla, Shafira; Hanifah, Hani
Fluida Vol. 18 No. 2 (2025): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v18i2.6560

Abstract

The rapid development of technology systems today has triggered a demand for battery development as energy storage. Utilizing the abundant biomass in Indonesia can meet commercial demands, one of which is rice husk. Rice husk is the protective layer that encases rice grains, containing holocellulose (55%), lignin (20%), SiO2 (20%), and minerals (5%), and has the potential to be used as a precursor for silica and carbon to create SiO2@C nanocomposites. In this study, SiO2@C composites were synthesized as lithium battery anode materials from rice husk using a calcination method and the addition of NaOH to form a porous morphology. The calcination process was carried out at 800℃ for 1 hour with a mass ratio of SP-C (Rice Husk Carbonization) and NaOH (1:1, 1:2, and 1:3). The synthesized SiO2@C composites exhibited a porous morphology within the mesopore size range of 13,94 nm at a 1:1 ratio and contained Si 2,42%, O 9,72%, and 87,86%. The mass ratio of NaOH addition can influence the surface area of the SiO2@C composites, with yields of 392,00 m2/g for 1:1 ratio, 1023,04 m2/g for the 1:2 ratio, and 1756,63 m2/g for the 1:3 ratio.
Co-Authors Abdilah, Fauzi Abdulloh, Harris Ade Suherman Andrijanto, Eko Ardiantina, Tiana Azzahra, Nasya Badra Sanditya Rattyananda Dessy Cartika Duyeh Setiawan Fauzi Abdilah Fauzi, Rafli Rizki Firdaus, Fachrel Muhammad Hanifah, Hani Haryadi, Haryadi Iswahyudi Iswahyudi Karina Aulia Rahmawati Karina Aulia Rahmawati Keryanti, Keryanti Lili Indrawati Muhamad Basit Febrian Nabila Sofiyani Nabilah, Nida Nabilah, Tiana Hasana Nancy Siti Djenar Ngatin, Agustinus Nida Nabilah Retno Indarti Rinaldi, Kardian Riniati Rizka Amalia Nuriana Salsabilla, Shafira Shalihatunnisa Shalihatunnisa Siti Fauziah Sudrajat Harris Abdulloh Suryadi, Joko Tiana Hasna Nabilah Titin Sri Mulyati Troskialina, Lina Utami, Naila Rahma Widya Tresna Dewi Widya Tresna Dewi Widyabudiningsih, Dewi Winda Putri Silpia Yusuf Sofyan