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All Journal Reaktor AL KAUNIYAH
Maulida Oktaviani
Research Center for Biomaterials Indonesian Institute of Sciences (LIPI)
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology

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Optimization of Xylose Production from Sugarcane Trash by Microwave-Maleic Acid Hydrolysis Euis Hermiati; Maulida Oktaviani; Riksfardini Annisa Ermawar; Raden Permana Budi Laksana; Lutfi Nia Kholida; Ahmad Thontowi; Siti Mardiana; Takashi Watanabe
Reaktor Volume 20 No.2 June 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.661 KB) | DOI: 10.14710/reaktor.20.2.81-88

Abstract

Sugarcane trash contains significant amount of xylan that could be hydrolysed to xylose. The xylose could be further fermented to produce xylitol, a sugar alcohol that has low calories and does not cause carries of teeth. In this study we optimized the production of xylose from sugarcane trash by microwave-assisted maleic acid hydrolysis using response surface methodology (RSM). The factors optimized were acid concentration, time, and temperature. The xylose yield based on the weight of initial biomass was determined and it served as a response variable. Results show that acid concentration and interaction between time and temperature had significant effect on xylose yield. The quadratic regression model generated from the optimization was fit and can be used to predict the xylose yield after hydrolysis with various combinations of acid concentration, time, and temperature. The optimum condition for xylose production from sugarcane trash was using maleic acid of 1.52%, and heating at 176 °C for 6.8 min. At this condition the yield of xylose was 24.3% per initial biomass or 0.243 g/ g biomass.Keywords: maleic acid; microwave heating; response surface methodology; sugarcane trash, xylose
Produksi Enzim Ligninolitik dan Dekolorisasi Pewarna Sintetis Oleh Isolat Baru Jamur Tropis Cymatoderma dendriticum WM01 Maulida Oktaviani; Nissa Nurfajrin Solihat; Yusup Amin; Dede Heri Yuli Yanto
Al-Kauniyah: Jurnal Biologi Vol 14, No 2 (2021): AL-KAUNIYAH JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v14i2.17184

Abstract

AbstrakPenggunaan pewarna sintetik pada berbagai industri telah menimbulkan pencemaran lingkungan. Jamur pelapuk putih (JPP) yang umumnya menghasilkan enzim ligninolitik dipercaya mampu mendegradasi senyawaan ini. Penelitian bertujuan untuk mengetahui kemampuan isolat baru JPP Cymatoderma dendriticum WM01 dalam memproduksi enzim ligninolitik dan mendekolorisasi pewarna sintetik. Skrining aktivitas enzim diukur berdasarkan pertumbuhan jamur pada media agar alkali-lignin, sedangkan aktivitas dekolorisasi diukur berdasarkan kemampuan jamur mendokolorisasi pewarna Remazol Brilliant Blue R (RBBR) pada medium agar. Kemampuan dekolorisasi dan aktivitas enzimatik jamur terhadap tiga jenis pewarna menggunakan media Dzapek-Dox cair yang masing-masing mengandung pewarna RBBR, Acid Blue 129 (AB129), dan Reactive Black 5 (RB5). Hasil penelitian menunjukkan pembentukan zona merah kecokelatan pada media alkali-lignin akibat adanya aktivitas degradasi lignin oleh jamur, sedangkan pemudaran warna pada media agar-RBBR menunjukkan kemampuan dekolorisasi jamur terhadap pewarna sistetis. C. dendriticum WM01 mendekolorisasi pewarna RBBR, AB129, dan RB5 dengan efisiensi masing-masing sebesar 22,6%, 81,9%, dan 12,1%. Selama proses dekolorisasi hanya enzim mangan peroksidase (0,3 U/L) yang dihasilkan oleh C. dendriticum WM01. Menariknya, penambahan ekstrak daun jati (50 mg/20 mL) mampu meningkatkan aktivitas enzim mangan peroksidase hingga 37,6 U/L dan lakase hingga 208,1 U/L. Penelitian ini menunjukkan bahwa isolat C. dendriticum WM01 berpotensi untuk digunakan pada dekolorisasi air limbah pewarna tekstil.Abstract The use of synthetic dyes in various industries caused environmental pollution. White-rot fungi, which generally produce ligninolytic enzymes, are believed to be able to degrade these recalcitrant compounds. This study aims to investigate the ability of the new isolate white-rot fungus Cymatoderma dendriticum WM01 to decolorize synthetic dyes. Screening of ligninolytic activity was based on fungal growth on alkali-lignin agar media, while decolorization activity was observed by the fungal ability to decolorize Remazol Brilliant Blue R (RBBR) dye in agar medium. The strain was tested to decolorize RBBR, Acid Blue 129 (AB129), and Reactive Black 5 (RB5) dyes in Dzapek-Dox broth media. The results showed the formation of a red-brownish area on alkali-lignin agar media, indicated degradation of lignin by strain WM01. The strain was able to decolorize RBBR, AB129, and RB5 dyes with efficiency of 22.6%, 81.9%, and 12.1%, respectively. During decolorization, only manganese peroxidase (0.3 U/L) was detected in culture medium.  Interestingly, the addition of teak leaf extract (50 mg/20 mL) increased the activity of manganese peroxidase to 37.6 U/L and laccase to 208.1 U/L. This study suggests that C. dendriticum WM01 has the potential to be used in decolorization of textile dye wastewater.
Co-Authors Ahmad Thontowi Dede Heri Yuli Yanto Euis Hermiati Lutfi Nia Kholida Nissa Nurfajrin Solihat Raden Permana Budi Laksana Riksfardini Annisa Ermawar Siti Mardiana Takashi Watanabe Yusup Amin