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Membranes in Bioprocessing: Theory and Applications (Hardcover, New edition)
Loot Price: R8,378
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Membranes in Bioprocessing: Theory and Applications (Hardcover, New edition)
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1. A. HOWELL School ofChemical Engineering, University ofBath,
Claverton Down, Bath, UK, BA2 7AY 1.1 WHAT IS A MEMBRANE PROCESS?
Every day over 20 million litres of brackish water are pumped out
of the ground near Jeddah in Saudi Arabia and passed through thin
sheets of cellulose acetate known as reverse osmosis membranes
before being used as part of the city's water supply. In St Maurice
les Chateauneuf, France three million litres a day of ground water
are ultrafiltered to supply the city and on test sites in Australia
settled sewage is being disinfected by being passed through
microfiltration membranes. Many of the foods we eat and beverages
we drink have used membranes during their processing. Orange juice
can be concentrated by membranes to make a concentrate which
retains more of the flavour than does evaporation. Milk can be
concentrated slightly by means of a membrane before making a cheese
in a process which produces no whey. Gases rising from the ground
in a waste tip can be piped away and the carbon dioxide separated
from the methane by a membrane process allowing the methane then to
be used as a fuel, simultaneously saving energy and reducing the
greenhouse effect since methane is more effective as a greenhouse
gas than carbon dioxide.
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