Moderate pretreatment strategies for improvement of reducing sugar production from oil palm empty fruit bunches

Harahap, Budi Mandra; Maulid, M R; Dewantoro, Awaly Ilham; Mardawati, Efri; Huda, Syamsul

doi:10.1088/1755-1315/443/1/012081

Cited by 4 publications

(3 citation statements)

References 42 publications

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“…The same trend was observed for hemicellulose composition in both U‐EPFG and G‐EPFG where the longer pre‐treatment time does not alter the structure of the biomass significantly, shown by negligible changes in the composition values. The results of this study were also reflected by studies conducted by Harahap et al., [ 21 ] where they observed that no significant difference of glucose concentration was produced at different pre‐treatment times when treating oil palm empty fruit bunch using the mild hydrothermal method. Therefore, in a mild hydrothermal pre‐treatment of a starch‐lignocellulosic biomass, further pre‐treatment time does not affect biomass structural changes, hence, it is unnecessary to prolong the pre‐treatment time that demands more energy.…”

Section: Resultssupporting

confidence: 84%

Structural Modification of Empty and Partially Filled Paddy Grain Through Hydrothermal Pre‐treatment as a Novel Substrate for Fermentable Glucose Production

et al. 2022

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In this study, two conditions of empty and partially filled paddy grain (EPFG) (unground and ground) are pre‐treated using a mild hydrothermal process at 120 °C at 30–120 min. The pre‐treatment condition which shows potential structural changes for sugar conversion (gelatinization of starch, reduction of hemicellulose to 11.8%, and increased in cellulose to 43.3%) involves combination of dry grinding and hydrothermal pre‐treatment at 60 min. In this condition, the starch and sugars released in the liquid fraction is high at 127 and 37.1 mg g−1, respectively, which can easily be converted into glucose without the need of enzyme usage. The effectiveness of the pre‐treatment on EPFG structural changes is further confirmed through scanning electron microscopy (SEM) and X‐ray diffraction (XRD), showing disruption of structures leading to amorphous biomass. Glucose production of pre‐treated ground EPFG (G‐EPFG) shows higher value at 30.13 g L−1 for 10% solid loading than the untreated samples. Overall, the results suggest that EPFG produced as waste in paddy milling factories can be a potential feedstock for a biorefinery based on the findings and processes derived from this study.

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Section: Resultssupporting

confidence: 84%

Structural Modification of Empty and Partially Filled Paddy Grain Through Hydrothermal Pre‐treatment as a Novel Substrate for Fermentable Glucose Production

et al. 2022

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“…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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“…This material is previously just converted to the heat and power generation or several products such as compost and mulch. Unfortunately, the rest 142 of this materials is still available in huge amount and needs other conversions to higher valuable products [1]. The OPEFB consisted of 36.59-43.54% cellulose, 19.14-24.97% hemicellulose, and 19.83-26.53% lignin [2][3][4][5] in which those components could still be utilized to produce high-added value products.…”

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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Moderate pretreatment strategies for improvement of reducing sugar production from oil palm empty fruit bunches

Cited by 4 publications

References 42 publications

Structural Modification of Empty and Partially Filled Paddy Grain Through Hydrothermal Pre‐treatment as a Novel Substrate for Fermentable Glucose Production

Structural Modification of Empty and Partially Filled Paddy Grain Through Hydrothermal Pre‐treatment as a Novel Substrate for Fermentable Glucose Production

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

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