000			03350cas|a2200409 a 4500
005			20260817171411.0
008			030418s2002 th uu m rtm 0| a1eng d
035			_a.b1188082x
099		9	_aAIT Thesis no.BP-02-13
100	0		_aJarupan Gobsuk
245	1	0	_aBio-deinking using enzymes for conserving fiber strength
260			_aBangkok : _bAsian Institute of Technology, _c2002
300			_a91 leaves : _bill.
490	1		_aThesis ; _vno. BP-02-13
502			_aThesis (M.Sc.) - Asian Institute of Technology, 2002
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
520			_aEnzymatic 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.
650		0	_aWaste paper _xRecycling
650		0	_aFibers
700	1		_aStevens, Willem Frans, _eChairperson
700	0		_aSuwalee Chandrhachang, _eExamination committee
700	1		_aNazhad, Mousa M., _eExamination Committee
700	1		_aRuhanen, Mauno, _eExamination Committee
710	2		_aRoyal Thai Govenment, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. BP-02-13
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B07386
907			_a.b1188082x _bmnait _cu
902			_a240403
998			_b0 _c030418 _dm _ea _fu _g0
945			_lmnait
945			_lmnarc
942			_c22
942			_c40
909			_aBarcode : 30050120683023 _bCREATED : 2013-06-09 _cRECORD # : i1273987x _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050120350680 _bCREATED : 2016-10-06 _cRECORD # : i13030073 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c12075 _d12075