C

Fig. 10.16b. A Sharpies Super-Centrifuge assembled for discharge of one liquid phase (Alfa Laval Sharpies, Camberley, U.K.).

ence of discs in the rotor or bowl (Fig. 10.19). A central inlet pipe is surrounded by a stack of stainless-steel conical discs. Each disc has spacers so that a stack can be built up. The broth to be separated flows outwards from the central feed pipe, then upwards and inwards beween the discs at an angle of 45° to the axis of rotation. The close packing of the discs assists rapid sedimentation and the solids then slide to the edge of the bowl, provided that there are no gums or fats in the slurry, and eventually accumulate on the inner wall of the bowl. Ideally, the sediment should form a sludge which flows, rather than a hard particulate or lumpy sediment. The main advantages of these centrifuges are

FlO. 10.17a. Diagram of a solid-bowl scroll centrifuge (Alfa Laval Sharpies Ltd, Cambcrley, U.K.).

Torque

Adjustable Plate Dam ponveyor

Inspection / Casing

Drive Pulley

Feed Tube

Torque ponveyor

Inspection / Casing

Drive Pulley

Feed Tube

Torque

Overload

Switch

Oil Feed" Bearings

Conveyor Discharge Nozzles

Oil Discharge From Bearings

Frame

Fig. 10.17b. Cutaway view of a Sharpies Super-D-Canter continuous solid-bowl centrifuge, Model P-5400 (Alfa Laval Sharpies Ltd, Camberley, U.K.).

Torque

Overload

Switch

Oil Feed" Bearings

Conveyor Discharge Nozzles

Oil Discharge From Bearings

Frame

Fig. 10.17b. Cutaway view of a Sharpies Super-D-Canter continuous solid-bowl centrifuge, Model P-5400 (Alfa Laval Sharpies Ltd, Camberley, U.K.).

their small size compared with a bowl without discs for a given throughput. Some designs also have the facility for continuous solids removal through a series of nozzles in the circumference of the bowl or intermittent solids removal by automatic opening of the solids collection bowl. The arrangement of the discs makes this type of centrifuge laborious to clean. However, recent models such as the Alfa Laval BTUX 510 (Alfa Laval Sharpies Ltd, Camberley, Surrey, U.K.) system (Fig.

10.20) are designed to allow for cleaning in-situ. In addition this and similar plant have the facility for in-situ steam sterilization and total containment, incorporating double seals to comply with containment regulations (see also Chapter 7). Feed rates range from 45 to 1800 dm3 mtar1, with rotational speeds typically between 5000 and 10,000 rpm. The Westfalia CSA 19-47-476 is also steam sterilizable and has been used for the sterile collection of organisms (Walker et at, t

Vinegar For Your Health

Vinegar For Your Health

A resource for the many ways you can use Vinegar to improve your health! In today's society of miracle medicine, we often overlook things that have been around hundreds of years! Things like Vinegar!

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