کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
223443 464373 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reverse osmosis concentration of press liquid from orange juice solid wastes: Flux decline mechanisms
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Reverse osmosis concentration of press liquid from orange juice solid wastes: Flux decline mechanisms
چکیده انگلیسی

Orange juice production produces high amount of solid waste. An alternative for these wastes is their pressing with lime to obtain a press liquor stream and a dried solid for cattle feeding. The press liquor (around 10 °Brix) is traditionally concentrated up to 70 °Brix (citrus molasses) by multiple effect evaporation. In this investigation, reverse osmosis is evaluated as an alternative for press liquor preconcentration. Two synthetic feed solutions were studied, one included pectin in its composition (WP) and the other lacked pectin (WOP) to simulate a previous depectinization of WP. The concentration process was evaluated in terms of some selected parameters (chemical oxygen demand, total soluble solids, total dissolved solids and osmotic pressure). The fouling mechanism as well as the membrane resistance to the permeate pass were assessed. It was found that for later stages of concentration cake filtration was the dominant fouling mechanism while for earlier stages, the mechanism found was the complete pore blocking. The presence of pectin not only maximized the membrane fouling but also led to worse permeate quality.


► Reverse osmosis is evaluated as an alternative for press liquor preconcentration.
► For later stages of concentration cake filtration was the dominant fouling mechanism while for earlier stages, the mechanism found was the complete pore blocking.
► The presence of pectin not only maximized the membrane fouling but also led to worse permeate quality.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Engineering - Volume 106, Issue 3, October 2011, Pages 199–205
نویسندگان
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