Autoclave-assisted weak acid pretreatment of oil palm empty fruits bunches for fermentable sugar production

Harahap, Budi Mandra; Dewantoro, Awaly Ilham; Maulid, M R; Mardawati, Efri; Yarlina, Vira Putri

doi:10.1088/1755-1315/443/1/012080

Cited by 4 publications

(2 citation statements)

References 23 publications

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“…The more furfural was formed, the lower xylose was obtained. The study reported by also had proven that the increase of acid concentration, time, and temperature significantly influenced the decrease of reducing sugars, including xylose, for other acids type such as oxalic, formic, and citric acid [39]. proposed twostage treatment to optimize the reducing sugar yield at the mild condition [40].…”

Section: A Hydrolysate Compositionmentioning

confidence: 99%

Physicochemical Properties of Xylitol Crystals from Oil Palm Empty Fruit Bunches Hydrolysate

Mardawati¹,

Annazhifah²,

Sukri³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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Xylitol, a low-calorie sugar made up of five carbon atoms, had the valuable characteristics suitably applied for pharmaceutical and food industries. This sugar can be produced from oil palm empty fruit bunches (OPEFB) through hydrolysis and followed by fermentation. The xylitol in the fermentation broth requires the downstream process to obtain the final product with high purity and yield. Among a series of xylitol downstream process, crystallization becomes a critical step since this process determines the properties of final products. The objective of this study was to evaluate the effect of evaporation temperature (55°C and 70°C) and seeding addition (0%, 0.1%, 0.5%, 1 %) in the crystallization step on the physicochemical properties of xylitol crystals obtained from the OPEFB hydrolysate. The main evaluation criteria were crystal contents, purity, melting point, water content, hygroscopicity, solubility, caloric content, and crystal xylitol yield. The result showed that the crystal form obtained was relatively sticky and had lower purity than commercial ones because the concentration of xylitol solution increased after evaporation. The differences of physicochemical properties of the crystals such as the purity, porosity, yield and crystal form were influenced by evaporation temperature. The crystals formed by 70°C evaporation temperature produced the crystals with higher caloric value and purity, but it had lower hygroscopicity and moisture content than crystals formed by 55°C. However, the percentage of seeding gave an insignificant impact on xylitol crystal properties.

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Section: A Hydrolysate Compositionmentioning

confidence: 99%

Physicochemical Properties of Xylitol Crystals from Oil Palm Empty Fruit Bunches Hydrolysate

Mardawati¹,

Annazhifah²,

Sukri³

et al. 2020

Int. J. Adv. Sci. Eng. Inf. Technol.

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“…The main challenge of enzymatic hydrolysis was the presence of lignin with a rigid structure that obstructed enzyme access in degrading cellulose and hemicellulose [9][10]. Thus, the lignin amount should be minimized from the solid fraction and destructed by the pretreatment process [11]. Assorted methods of pretreatment had been considerably reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Pretreatment on Production of Reducing Sugar from Oil Palm Empty Fruit Bunches

et al. 2020

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Perlakuan pendahulan biomassa merupakan tahapan terpenting dalam memproduksi produk-produk berbasis bio (bio-based products) secara biologis. Pada penelitian ini, energi gelombang mikro (microwave) digunakan selama perlakuan pendahuluan untuk meningkatkan kinerja proses sakarifikasi tandan kosong kelapa sawit (TKKS) menjadi gula-gula pereduksi. Faktor-faktor yang mempengaruhi perlakuan pendahuluan seperti daya (180-360 watt), waktu iradiasi (5-30 menit), dan solid loading (2,5%-7,5%) dievaluasi. Kinerja hidrolisis TKKS yang telah diberi perlakuan pendahuluan selanjutnya dianalisis dengan Cellic CTec2. Hasil penelitian menunjukkan bahwa cairan residu yang diperoleh setelah perlakuan pendahuluan menghasilkan gula pereduksi dalam jumlah yang rendah, yaitu antara 1,39 dan 3,92 mg/g-TKKS. Akan tetapi, setelah padatan residu dihidrolisis secara enzimatis, rendemen gula pereduksi meningkat secara signifikan. Menariknya, hanya pada level daya terendah (180 watt), gula pereduksi meningkat seiring dengan perpanjangan waktu iradiasi untuk semua solid loading. Sebaliknya, pada 360 watt, semakin lama waktu iradiasi diterapkan, semakin rendah gula pereduksi yang diperoleh untuk semua solid loading. Gula pereduksi tertinggi dihasilkan hingga 151 mg/g-TKKS, yaitu menggunakan 5% padatan pada 180 watt selama 25 menit. Berdasarkan hasil-hasil ini, perlakuan pendahuluan menggunakan gelombang mikro yang diikuti dengan hidrolisis enzimatis merupakan salah satu metode yang potensial untuk memproduksi gula dari TKKS.Pretreatment of biomass is the most crucial step in the biological production of bio-based products. In this study, microwave energy was used during the pretreatment process to enhance the saccharification performance of oil palm empty fruit bunches (OPEFB) into reducing sugar. The influential factors of pretreatment such as power level (180-360 watt), irradiation time (5-30 min), and solid loading (2.5%-7.5%) were evaluated. The performance of pretreated OPEFB hydrolysis was subsequently assessed by Cellic CTec2. The result showed that spent liquor produced after pretreatment only released a low amount of reducing sugar in the range between 1.39 and 3.92 mg/g-OPEFB. After residual solid was enzymatically hydrolyzed, a significant increase in the reducing sugar yield occurred. Interestingly, only at the lowest power level (180 watts), the reducing sugar rose along with the extension of irradiation time for all solid loadings. On the contrary, the longer irradiation time was applied, the lower reducing sugar was acquired at 360 watts for all solid loadings. The highest reducing sugar was produced up to 151 mg/g-OPEFB using 5% solid at 180 watts for 25 min. This indicated that microwave pretreatment followed by enzymatic hydrolysis was one of the potential methods to recover sugars in OPEFB.

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Characterization of lignin isolated from oil palm empty fruit bunch using phosphoric acid

Hidayati

Hadi

Saputra

et al. 2023

Biomass Conv. Bioref.

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Autoclave-assisted weak acid pretreatment of oil palm empty fruits bunches for fermentable sugar production

Cited by 4 publications

References 23 publications

Physicochemical Properties of Xylitol Crystals from Oil Palm Empty Fruit Bunches Hydrolysate

Physicochemical Properties of Xylitol Crystals from Oil Palm Empty Fruit Bunches Hydrolysate

Effect of Microwave Pretreatment on Production of Reducing Sugar from Oil Palm Empty Fruit Bunches

Characterization of lignin isolated from oil palm empty fruit bunch using phosphoric acid

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