000			03268ntm a2200277 a 4500
001			vtls000093767
003			KUKTEM
005			20251117113435.0
008			160310t2015 my da f ab m 000 0 eng d
020			_aTHE0007976(Local)
039		9	_a201906131150 _bnadia _y201603101132 _zasma
040			_aUMP
090			_aFKKSA .S84 2015 r Thesis
100	0		_aSuharti Md Ishak
245	1	0	_aRecovery of Xylan for the production of xylose from Meranti Wood Sawdust (MWS) by two stage pretreatment process / _cSuharti Md Ishak
260			_aKuantan, Pahang : _bUMP, _c2015
300			_axix, 133 p. : _bill. col. ; _c30 cm. + _e1 CD-ROM
500			_aFaculty of Chemical & Natural Resources Engineering
502			_aThesis (Master of Engineering (Bioprocess)) -- Universiti Malaysia Pahang – 2015
504			_aBibliography : p. 107-118
520	3		_aMeranti wood sawdust (MWS) is a lignocellulosic material that contains three main components of polymer, which are cellulose, hemicellulose and lignin. It consists of more than 29% xylan, which is made up from the pentose sugar xylose. This study was carried out to produce xylose from Meranti wood sawdust (MWS) using two stage pretreatment processes; physical (autohydrolysis process) and biological (enzymatic process). Following that, comparison was done in order to determine between the two stage pretreatment process and acid hydrolysis which is the best method for xylose production. Optimization of MWS autohydrolysis was conducted with statistical design including one factor at a time (OFAT) method for maximum xylan recovery. The results of the OFAT study indicate that residence time, temperature and liquid solid ratio (LSR) are the major factors for improving xylan recovery. The factors were further optimized by response surface methodology (RSM), and the optimum values obtained for temperature, residence time and LSR were 140 ºC, 15 minutes and 8 g/g, respectively. Under these conditions, 19.34 % of xylan was recovered. Xylanase from Trichoderma viride was used in the enzymatic hydrolysis process to enhance the production of xylose from xylan. Under selected operational conditions (pH 5, temperature at 37 oC, 150 rpm for 12 hr), maximum xylose and arabinose were recovered at 13.60 g/L and 9.78 g/L respectively. During acid hydrolysis, sulfuric acid was used to hydrolyse xylose from MWS at operational condition 3.24% w/w H2SO4, 40 min reaction time and 121 ºC temperature, giving maximum xylose, glucose and arabinose production of 14.13 g/L, 4.776 g/L and 2.48 g/L, respectively. The byproducts that obtained from acid hydrolysis were furfural and acetic acid with 2.64 g/L and 3.91 g/L, respectively. The two stage pretreatment process was successful in obtaining purified xylose without producing any byproduct. The results obtained from the present study clearly demonstrate the potential of both methods for the production of xylose, which can serve as a functional food ingredient such as xylitol, from MWS
610	2	0	_aFaculty of Chemical & Natural Resources Engineering _xDissertations
650		0	_aUniversities and Colleges _xDissertations
650		0	_aTheses
999			_aVIRTUA40 _c8703 _d8709
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