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

2nd International Conference on Innovation in Engineering and Vocational Education

工业技术;教育

Sangian, H.F.^1 ; Widjaja, A.^2

Jurusan Fisika, Universitas Sam Ratulangi Manado, Sulawesi Utara

95115, Indonesia^1

Jurusan Teknik Kimia, Institut Teknologi Sepuluh Nopember Surabaya, Jawa Timur

60111, Indonesia^2

关键词: Alkaline pretreatment;    Biochemical reactions;    Cellulose and hemicellulose;    Chemical compositions;    Coconut coirs;    Crystallinities;    Pre-Treatment;    Reducing sugars;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/306/1/012046/pdf
DOI  :  10.1088/1757-899X/306/1/012046

来源: IOP

【 摘 要 】

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).