Lee , Chee Keong
(2005)
Development Of An Enzymatic
Deinking System Of Laser
Printed Waste Papers.
Masters thesis, Universiti Sains Malaysia.
Abstract
Kaj ian ini memberi tumpuan kepada pembangunan proses penyahdakwatan enzimatik
ke atas kertas terpakai. Dengan menggunakan kertas terpakai bercetak laser untuk
penyahdakwatan enzimatik, pengoptimuman ke atas hidrolisis enzimatik dan
penyingkiran ink dijalankan. Aktiviti optimum dan kestabilan terhadap pH dan suhu
bagi selulase A " Amano" 3 (e), hemiselulase "Amano"90 (H) dan lipase F-AP 15 (L)
dipilih untuk digunakan dalam proses penyahdakwatan. Suhu dan pH optimum bagi
enzim e, H dan L adalah 55°e dan pH 2.5, 500e dan pH 4.5, 400e dan pH 7.5, masingmasing.
The present work deal with the development of the enzymatic deinking process of waste
papers. Based on the enzymatic deinking of laser-printed waste papers, studies on the
optimization of enzymatic hydrolysis and ink removal were performed using
commercial enzyme preparations. The optimum activities and stabilities at different pH
and temperatures of the enzymes, cellulase A "Amano"3 (C), hemicellulase "Amano"90
(H) and lipase F-AP 15 (L) were selected for use in deinking process. The optimum
temperature and pH of C, Hand L were 55°C and pH 2.5, 50°C and pH 4.5, 40°C and
pH 7.5, respectively.
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