03350cas|a2200409 a 4500 20260817171411.0 030418s2002 th uu m rtm 0| a1eng d .b1188082x AIT Thesis no.BP-02-13 Jarupan Gobsuk Bio-deinking using enzymes for conserving fiber strength Bangkok : Asian Institute of Technology, 2002 91 leaves : ill. Thesis ; no. BP-02-13 Thesis (M.Sc.) - Asian Institute of Technology, 2002 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Enzymatic deinking is becoming an interesting technology in paper recycling. The deinking of paper can be achieved using enzyme treatment instead of chemical treatment. Moreover, deinking with enzymes can be carried out under condition that has less impact on occupational health and are more acceptable for environmental sustainability. The goal of this study was to determine the mechanical properties and optical properties of paper prepared with pulp that has been deinked either in conventional way or by the use of enzyme. In this study, basesheets surface sized with chitosan and oxidized starch were printed using ink-jet inks and processed for laboratory scale deinking. During deinking, various enzymes were used. The deinked pulp was used to prepare handsheets. These handsheets \·Vere assessed for the following properties; physical strength, brightness and opacity. The ink content of deinked pulp was also measured by the determination of effective residual ink concentration (ERIC) after the deinking process. The overall result of enzymatic deinking was compared with that of the traditional method. Chitosan deinked handsheet obtained greater tensile index, brightness and ERIC in the enzymatic process as compared with the chemical method. In case of oxidized starch deinked handsheet, chemical deinking exhibited better properties than that of enzymatic deinking. Enzymatic deinking provided superior effect on brightness and residual ink concentration. However, enzymatic deinking did not give better results in strength and optical properties when compared with control. Waste paper Recycling Fibers Stevens, Willem Frans, Chairperson Suwalee Chandrhachang, Examination committee Nazhad, Mousa M., Examination Committee Ruhanen, Mauno, Examination Committee Royal Thai Govenment, Scholarship donor Asian Institute of Technology. Thesis ; no. BP-02-13 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B07386 .b1188082x mnait u 240403 0 030418 m a u 0 mnait mnarc 22 40 Barcode : 30050120683023 CREATED : 2013-06-09 RECORD # : i1273987x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120350680 CREATED : 2016-10-06 RECORD # : i13030073 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12075 12075 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.BP-02-13 30050120683023 2026-08-17 17:14:11 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.BP-02-13 30050120350680 2026-08-17 17:14:11 2026-08-17 40