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005			20260818095027.0
008			110920s1989 th uu|m rtt 0| a1eng d
035			_a.b10227969
099		9	_aAIT Thesis no. AE-89-23
100	0		_aMontip Chamchong
245	1	0	_aEffect of pH and enzymatic treatment on the performance of micro/ultrafiltration of tangerine juice
260			_aBangkok : _bAsian Institute of Technology, _c1989
300			_a91 p.
490	1		_aThesis ; _vno. AE-89-23
500			_aA Thesis submitted in partial fulfilment of the requirements for the degree of Master of Science, School of Environment, Resources and Development
502			_aThesis (M.Sc.) - Asian Institute of Technology, 1989
520			_aTangerine (Citrus reticulata blanco) juice was clarified by crossflow microfiltration (CFMF) and ultrafiltration (CFUF} with a polysulphonic membrane. The membranes used were of mw.cut-off 25000, 50000, 100000 and 0.1 æm, 0 . 2 æm pore sizes. The juice was filtered by using a laboratory filtration module made of acrylic resin,120 mm long and 70 mm wide. The transmembrane pressure used was 93 to 194 kPa and a crossflow velocity used was 0.96 to 3.54 m/s at 25 °C . Juice was treated with hydrochloric acid and polygalacturonase before filtration. The performance of both membrane types was determined in terms of quality and quantity of the permeate. Ultrafiltration membrane of pore size 0.1 æm gave the maximum permeate flux and accepted quality by ANOVA based on its clarity. Highest transmembrane pressure of 194 kPa gave maximum filtrate production and quality of permeate flux showed non significant with the lower transmembrane pressure of 137 kPa. Similar to transmembrane pressure, the highest feed crossflow velocity of 3.54 m/s also gave maximum filtrate rate but the permeate was not as clear as the others. These results could be explained by apparent membrane and gel resistance, the concentration polarization, mass transfer coefficient and real rejection of each operating parameter.
650		0	_aUltrafiltration
650		0	_aOrange juice
700	0		_aAthapol Noomhorm, _eChairperson
700	1		_aIllangantileke, Sarath G., _eExamination Committee
700	1		_aYamamoto, K., _eExamination Committee
710	2		_aThe Government of France, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-89-23
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B17853
907			_a.b10227969 _bmnait _cs
902			_a240329
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