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Ultrafiltration maintenance

Following ultrafiltration of whey, the permeate passes over a reverse osmosis (qv) membrane to separate the lactose from other components of the permeate. Reverse osmosis can be used to remove water and concentrate soHds in a dairy plant, giving a product with 18% soHds and thus decreasing the difficulty of waste disposal. Concentration of rinse water gives a product with 4—5% total soHds. Proper maintenance of the membrane allows for use up to two years. Membranes are available for use up to 100°C with pH ranges from 1 to 14 the usual temperature range is 0—50°C. [Pg.368]

In addition, our results suggest that removal of hpids improves both yield characteristics and elemental characteristics. Recent work by Liden et al. (1995) suggests that the methanol-chloroform method used here is more effective than other methods, such as treatment with NaOH solution, or the maintenance of an acidic environment and ultrafiltration of products during collagen extraction. It is speculated that the presence of hpids in archaeological bone samples may interfere with the acid hydrolysis of protein during... [Pg.153]

Micro-ultrafiltration and reverse osmosis are mature technologies for separations based on molecular exclusion and solution-diffusion mechanisms, respectively. Cleaning and maintenance procedures able to control fouling to an acceptable extent have made these processes commercially suitable. [Pg.575]

The most convenient and simple method for production is ultrafiltration. The method uses membrane tubes with pore sizes from about 6000 to 50000 A. Small molecules like salt ions as well as water pass through the pores of the membrane tube while large molecules like proteins remain inside the tube. The concentration of the buffer solution is the same before and after ultrafiltration. The leaking of desired proteins in permeates should be checked during the concentration stage. Regular maintenance is carried out by using a standard protein. The membrane tube is made of polyethylene, polypropylene etc., and the irreversible adsorption of desired proteins should be avoided. The materials for the membrane should be selected before use. The flow rate of ultrafiltration depends on the facility and the protein solution applied. The final protein concentration is up to about 100 g/L. [Pg.50]

There are several potential mechanisms of PG involvement in the pathogenesis of acute renal failure (ARF). Vascular factors are pre-eminent in the initiation and maintenance of acute renal failure. These include control of RBF, autoregulation, tubuloglomerular feedback, the glomerular capillary ultrafiltration coefficient (Kf), the no-reflow phenomenon (which is secondary to capillary endothelial injury and swelling), the renin-angiotensin system and endogenous vasoconstrictors (e.g. catecholamines). [Pg.39]


See other pages where Ultrafiltration maintenance is mentioned: [Pg.476]    [Pg.77]    [Pg.52]    [Pg.262]    [Pg.222]    [Pg.270]    [Pg.446]    [Pg.60]    [Pg.674]    [Pg.326]    [Pg.96]    [Pg.152]    [Pg.46]    [Pg.267]   
See also in sourсe #XX -- [ Pg.836 ]

See also in sourсe #XX -- [ Pg.836 ]

See also in sourсe #XX -- [ Pg.836 ]




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