Ahmad Muhammad Fuadi...[et al.] Primary Author mixed material bibliography Serial JKPK (Jurnal Kimia dan Pendidikan Kimia) UNS ind Indonesia

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Sumber artikel:Jurnal. Halaman: 69-84 Abstract The demand for paper has been increasing over time leading to the pulp and paper industry becoming one of the largest contributors to global carbon emissions due to the chlorine-based bleaching process particularly in Indonesia. An alternative to minimize chlorine usage involves using xylanase enzymes as part of the bleaching sequence. Xylanase can be produced from agricultural waste including cassava residue which contains a significant concentration of xylanase approximately 21.3%. However it still needs to be utilized in Indonesia. Therefore this study aims to explore the production of xylanase enzymes from cassava residue and assess its effectiveness in the biobleaching process of pulp. The research methodology includes the production phase of xylanase enzymes by Aspergillus niger chelating bleaching sequence bleaching kappa number and chemical saving assay. In the production of xylanase the study determined that xylanase exhibits optimal activity under specific conditions notably at a pH of 6 and a temperature of 60 deg C. Under these parameters the enzymatic activity reached a level of 0.4986 U/mg protein. During the bleaching sequence xylanase was used with doses of 0.3 0.5 0.7 0.8 and 1 L/T pulp at 40 45 50 55 60 65 and 70 deg C for 60 minutes. Following this process bleaching was conducted at 65 deg C for 70 minutes extraction at 80 deg C for 90 minutes and a second bleaching phase. Subsequently a kappa number test was performed revealing the best kappa value at 60 deg C with a xylanase dose of 0.5 L/T pulp reducing from an initial kappa number of 9 to 4.04. Additionally under these conditions and dosage xylanase enzymes could save approximately 23.67% in chlorine usage Keywords bleaching sequence bio-bleaching xylanase enzyme cassava residue. 1. ENZIM XILANASE - BIO-BLECHING KERTAS 540 JKP UPT Perpustakaan UM Koleksi Bahan Pustaka Perpustakaan UM 2 -94342 2024-12-17 00:00:00 2024-12-17 00:00:00 machine generated