Hidrolisis Sabut Kelapa Dengan Optimasi Prapengolahan Hidrotermal dan Delignifikasi Menggunakan Prapengolahan Deep Eutectic Solvent

Wijaya, Candra (2023) Hidrolisis Sabut Kelapa Dengan Optimasi Prapengolahan Hidrotermal dan Delignifikasi Menggunakan Prapengolahan Deep Eutectic Solvent. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sabut kelapa merupakan limbah agrikultural yang melimpah di Indonesia. Pemanfaatan yang dilakukan belum kepada taraf peningkatan nilai jual yang signifikan. Namun, sabut kelapa merupakan biomassa lignoselulosa yang sangat berpotensi untuk dikonversi menjadi sumber bioenergi dan bahan kimia berbasis bio. Konversi tersebut hanya dapat dicapai apabila dilakukan prapengolahan terlebih dahulu seperti prapengolahan yang ramah lingkungan seperti hidrotermal dan deep eutectic solvent (DES). Prapengolahan hidrotermal memungkinkan perubahan sifat fisika dan kimia air agar dapat menghidrolisis polisakarida pada lignoselulosa menjadi gula-gula pereduksi.Sedangkan, prapengolahan DES memungkinkan adanya interaksi pelarutan dan depolimerisasi lignin sehingga dapat dengan selektif untuk memisahkan lignin. Pada penelitian ini dilakukan studi response surface methodology (RSM) pada proses hidrotermal dan dilanjutkan dengan prapengolahan DES. Respons optimal diperoleh dengan TRS 4,961 g/L, glukosa 0,22 g/L, xilosa 0,882 g/L, furfural 0,461 g/L, 5-HMF 0,596 g/L, dan residu padatan 3,926 gram. Prapengolahan lanjutan dengan DES menunjukkan %delignifikasi yang relatif besar, yaitu 61,64%. Namun nilai ini tidak sebesar dengan prapengolahan DES saja, yaitu 75,34%. Hal ini dikarenakan beban delignifikasi yang besar dan terjadi kondensasi atau repolimerisasi lignin selama prapengolahan hidrotermal. Kombinasi prapengolahan hidrotermal dan DES memungkinkan untuk memperoleh 3 fraksi komponen utama secara spesifik.
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Coconut husk is an abundant agricultural waste in Indonesia. Utilization has not been done to the level of a significant increase in selling value. However, the coconut husk is a lignocellulosic biomass that has the potential to be converted into a source of bio-energy and bio-based chemicals. This conversion can only be achieved if pretreatment is carried out such as environmentally friendly pretreatment such as hydrothermal and deep eutectic solvent (DES). Hydrothermal pretreatment allows changes in the physical and chemical properties of water in order to hydrolyze the polysaccharides in lignocellulose into reducing sugars. Meanwhile, DES pretreatment allows for the interaction of dissolution and depolymerization of lignin so that it can selectively separate lignin. In this research, a response surface methodology (RSM) study was carried out in the hydrothermal process and continued with DES pretreatment. Optimal responses were obtained with TRS 4.961 g/L, glucose 0.22 g/L, xylose 0.882 g/L, furfural 0.461 g/L, 5-HMF 0.596 g/L, and residual solids 3.926 grams. Further pretreatment with DES showed a relatively large % delignification, namely 61.64%. However, this value is not as big as the DES pretreatment alone, which is 75.34%. This is due to the large delignification load and the occurrence of condensation or repolymerization of lignin during hydrothermal pretreatment. The combination of hydrothermal pretreatment and DES makes it possible to obtain 3 main component fractions specifically.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	prapengolahan hidrotermal, sabut kelapa, gula pereduksi, produk degradasi, prapengolahan DES. hydrothermal pretreatment, coconut husk, reducing sugar, degradation product, DES pretreatment.
Subjects:	Q Science > QD Chemistry > QD251.2 Chemistry, Organic. Biochemistry
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Chemical Engineering > 24101-(S2) Master Thesis
Depositing User:	Candra Wijaya
Date Deposited:	12 Feb 2023 14:45
Last Modified:	12 Feb 2023 14:45
URI:	http://repository.its.ac.id/id/eprint/96895

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