Claim Missing Document
Check
Articles

Pengaruh Variasi Delignifikasi NaOH dan Variasi Hidrolisis H2SO4 Terhadap Produksi Bioetanol dari Limbah Umbi Porang Menggunakan Saccharomyces cerevisiae Marliaty, Toety; Ahmad, Adrianto; Bahruddin, Bahruddin
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 7 No 1 (2026): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Department of Chemical Engineering, Faculty of Engineering, UNRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jbchees.7.1.54-66

Abstract

Second-generation bioethanol from non-food biomass requires pretreatment and hydrolysis conditions that increase fermentable sugar release while keeping the hydrolysate suitable for fermentation. This study evaluated the effects of NaOH delignification (1–2% v/v) and dilute H₂SO₄ hydrolysis (0.25–0.75% v/v) on sugar formation and ethanol production from porang tuber waste using Saccharomyces cerevisiae. Porang chips (60 mesh) were pretreated at 100°C for 60 min at a 1:10 (w/v) solid-to-liquid ratio, washed to near-neutral pH, and subsequently hydrolyzed at 100°C for 60 min at 1:20 (w/v). Structural carbohydrates were quantified by the Chesson–Datta method, reducing sugars by UV–Vis spectrophotometry, and ethanol by distillation followed by refractometry. NaOH at 1.5% resulted in the most favorable compositional change, increasing cellulose to 55.3% and reducing lignin to 7.0%. The highest initial glucose in the hydrolysate (41.22 g/L) and the best ethanol performance were obtained at NaOH 1.5%–H₂SO₄ 0.5%, reaching 8.62 g/L ethanol, a yield (Yp/s) of 0.434 g/g, and 85.0% of the theoretical yield. Overall, within the tested NaOH–H₂SO₄ ranges, moderate pretreatment and hydrolysis levels provided a practical balance between sugar release and fermentation performance at bench scale. Measurement variability and uncertainty (replicates and dispersion metrics) are reported in the Results to support the observed trends
Co-Authors Abbas, Nur Asrah Abd. Rahim Abdullah Abdullah Abdur Raziq Ade Rahayu Putri Adrianto Ahmad Afrianti, Dwi Afrilianti, Azyarah Afrilla, Nurul Agusriani, Uci Ahmad Fadli Ahmad Zain Sarnoto Ajib, Andi Muhammad Akbar, Anif Aulia Aldiawan, Aldiawan Alia fitri Alirman, Pidiya Ambtenarie Jessica Sihombing, Ambtenarie Jessica Aminuyati Amraini, Said Jul Amun Amri Anisa, Sufitri Arfah, Rudy Artha, Ulfa Dwi Asrindah, Asrindah Aulia Nur Rahmah Briliantina Rossa Damayanti, Elok Darmawan Darmawan Deliana, Putri Dewi, Hefi Rusnita Dwifirman, Widya Edi Kurniawan Ekawati, Lestari Erdiana, Erdiana Fadli, A fatimah Fatimah Fatmawati Fatmawati Fatmawati, Fatmawati Fauzi, Subehan Febriani , Nur Arfiyah Febye Alfia Azzahra Firmansyah Fitriani Fitriani Hamnah, Hamnah Hapsa, Nur Hara Novarisa Nanda Harsani, Harsani hasdiana, hasdiana Hazirah, Nurul Hendri, Zwilla Oktoriana Hotnida Butar Butar HS, Irdoni. Ida Zahrina Iradhatullah Rahim Irdoni HS Irdoni Irdoni Irfan Maulana, Irfan Irmayani Irmayani Israwati Israwati, Israwati Jahrizal Khairat, Khairat Khofifah Indar Ladung, Fajar Lubis, Apriadi Mahenra, Yusri Marliaty, Toety Marsyam, Abdul Waris Mayasari Yamin, Mayasari Mica, Mica Mizan, Abdullah MS, Frasucia Aquaviva Muhammad Abdian Abdillah Muhammad Hatta Muhammad Idris Hasanuddin Muhammad Muhammad Muhammad Reza Muhammad Rivai Munir Munir, Munir Musdalifah Musdalifah Nadimisia, Tiara Dwisca Nisa, Fariq Fahrun Nopi Andri Musfa, Nopi Andri Novriyani, Vivi Nufus, Izatun Nunuy Nurjanah Nurazisah, Nurazisah Nurazizah Nurazizah, Nurazizah Nurhidayah Nurhidayah Okky Naomi Sahupala Oktaviani, Cindy Pakpahan, Cindy R Firmansyah Rahmani, Wahyu Suci Rahmat Rahmat Rahmawati Semaun Rahmawati, Rahmawati Ramlayani, Ramlayani Renaldi Renaldi Rismawati Rismawati Romfis, Dio Rosmawati, Putri Rubia, Rubia Ruslang T Ruslang T Rusmin Nuryadin Russita Martani S, Sukri Saal, Nur Iman Sampara, Nirwana Sanjaya, Andi Arjuna Sarina Sarina Sa’diyah, Maemunah Septian, Septian Septiana Veronika s, Septiana Veronika Shaleh, Idries Hamidi Sri Nur Qadri Sri Rezeki Muria ST. Nur Halisa Sugesti, Heni Suhardi, Dayu Suhari Suhari Suherman, Suherman Sukardi Sukardi Sukmawati Sukmawati Sumadi, Eko Supriatna, Nisrina Khairunnisa SUSANTO, RENO Susanty, Wenny Syahwardini, Trisuciati Syamsiar Zamzam Syamsiar, Syamsiar Syamsu Herman Syarfi Daud Syarfi, Syarfi Syarfie, Syarfie Syelvia Putri Utami Syukri, Fitriyani T, Ruslang Tahir, Heriati Umar Umar Untung Suwardoyo Utami, Syielvia Putri W, Ririen Wahdaniyah Wahdaniyah, Wahdaniyah Wardhani, Wardhani Wiranata, Arya Yelmida Azis Yolanda, Putri Gusti Yulia, Indri Yulianto, Farikhatul Akhlis Fahruddin Yunus, Aulia Zainuddin, Zainuddin Zuchra Helwani, Zuchra Zuhdiah, Zuhdiah Zuliarti, Indah Zultiniar, Zultiniar