The Effect of Alkaline Concentration on Coconut Husk Crystallinity and the Yield of Sugars Released

H. F. Sangian, A. Widjaja*

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

11 Citations (Scopus)


This work was to analyze the effect of alkaline concentration on coconut coir husk crystallinity and sugar liberated enzymatically. The data showed that the employing of alkaline on lignocellulose transformed the crystallinity. The XRD peaks increased highly which indicated that cellulose was more opened and exposed. After pretreatment, the chemical compositions (cellulose, hemicellulose, and lignin) were changed significantly. The employing 1% alkaline, the cellulosic content inclined if compared to that of non-pretreatment. When the alkaline concentration was added to 4%, the cellulose was decreased slightly which indicated that a part of cellulose and hemicellulose was dissolved into solution. It was found the alkaline pretreatment influenced by the biochemical reaction of treated substrates in producing the reducing sugars. The amounts of sugar liberated enzymatically of coconut husk treated by 1% and 4% alkaline increased to 0.26, and 0.24 g sugar/g (cellulose+hemicellulose), respectively, compared to that of native solid recorded at 0.18 g sugar/g (cellulose+hemicellulose).

Original languageEnglish
Article number012046
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 22 Feb 2018
Externally publishedYes
Event2nd International Conference on Innovation in Engineering and Vocational Education, ICIEVE 2017 - Manado, North Sulawesi, Indonesia
Duration: 25 Oct 201726 Oct 2017


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