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All Journal Jurnal Keteknikan Pertanian Tropis dan Biosistem Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia
Veliska, Audrya Nasywa
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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Screening of Polysaccharide-Lytic Enzymes by Aspergillus Oryzae on Corncob (Zea mays) and Banana Peel (Musa acuminata Colla) Mufidah, Elya; Veliska, Audrya Nasywa; Mifzal, Adib Maula; Tantalu, Lorine
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 10, No 1 (2025): EDISI MARET 2025
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v10i1.6734

Abstract

Polysaccharide-lytic enzymes (PLEs)—xylanase, pectinase, amylase, β-glucosidase and endoglucanase—play key roles in the food, feed and bioenergy sectors by converting lignocellulosic waste into fermentable sugars. This study evaluated the ability of Aspergillus oryzae to produce these five PLEs on two abundant yet under-utilised agro-industrial residues: corn cobs (Zea mays) and banana peels (Musa acuminata balbisiana Colla). Submerged fermentation was performed using 1 % (w/v) substrate at 30 °C and 120 rpm. Enzyme activities were determined colorimetrically, and differences between substrates were analyzed using Mann–Whitney U test whereas the starch- and pectin-rich banana peels favour pectinase, amylase, glucosidase and endoglucanase, Spearman–Kendall correlation, and linear regression. The highest xylanase titre (12.8 ± 0.2 IU mL⁻¹) was achieved with corn cobs—about 1.5-fold higher than with banana peels (p 0.05). Conversely, banana peels significantly boosted pectinase (2.5 IU mL⁻¹), amylase (14.0 IU mL⁻¹), β-glucosidase (18.1 IU mL⁻¹) and endoglucanase (15.2 IU mL⁻¹) compared with corn cobs (p 0.05). Strong negative correlations (ρ ≈ −0.85 to −0.95) were observed between xylanase and the other enzymes, while the latter showed very strong positive intercorrelations (ρ ≈ 0.81–0.98). Linear regression confirmed that substrate type significantly affected enzyme yields (R² 0.90; p 0.001). These findings indicate that corn cobs are the most effective substrate for xylanase production, whereas banana peels better support pectinase, amylase, β-glucosidase, and endoglucanase synthesis. The results highlight the importance of selecting appropriate agro-waste substrates to maximise enzyme production and sustainably valorise agricultural residues 
Screening of LAB-Compatible Fungi and the Effect of Corncob Substrate Concentration on D(-) Lactic Acid Production using the Multiple Parallel Fermentation (MPF) Approach: Skrining Kapang yang Kompatibel dengan BAL serta Pengaruh Konsentrasi Substrat Tongkol Jagung terhadap Produksi Asam Laktat D(-) melalui Pendekatan Multiple Parallel Fermentation (MPF) Mufidah, Elya; Mifzal, Adib Maula; Veliska, Audrya Nasywa; Rahayu, Farida; Irawati, Maghfira Selia; Wibisono, Yusuf; Sugiarto, Yusron; Nurika, Irnia
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 2 (2025): August 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.02.02

Abstract

Biological production of D(-) lactic acid is being advanced as an eco-friendly alternative to petrochemical routes. This study optimizes D(-) lactic-acid production from corn cobs through Multiple-Parallel Fermentation (MPF), which combines a polysaccharide-degrading filamentous fungus with lactic-acid bacteria (LAB) in a single reactor. The novelty of the work lies in deploying a specific consortium of Aspergillus sp. and Leuconostoc mesenteroides for parallel fermentation of corn-cob biomass—a combination not previously reported. Three fungal isolates and three LAB strains were screened to identify the most compatible pairing. Fermentations were run at initial pH 7.0 and 39 °C with substrate concentrations of 3, 5 and 7% w/v. The 7% loading yielded the highest D(-) lactic-acid titer (14.01 % w/v), although differences among treatments were not statistically significant (p > 0.05). One-way ANOVA satisfied normality and homogeneity-of-variance assumptions, and linear regression indicated a moderate relationship between substrate concentration and lactic-acid yield (R² = 0.429). A D/L ratio exceeding 95:5 across all treatments confirmed selective D(-) isomer formation by L. mesenteroides. These results demonstrate the promise of MPF using local lignocellulosic waste as an efficient, sustainable route to D(-) lactic acid.
Co-Authors Farida Rahayu Irawati, Maghfira Selia Irnia Nurika Lorine Tantalu Mifzal, Adib Maula Mufidah, Elya Yusron Sugiarto Yusuf Wibisono