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Fruit juice extraction using a two-stage decanter system
@IT JUICEEXTRACTION Fruit juice extraction using a two-stage decanter system The installation of modern Centridrink decanters from KHD Humboldt Wedag has resulted in the achievement of a juice yield greater than 90% at Bittenfelder Fruchts/ilte Petershans GmbH.
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n the course of its 1993/94 season, Bittenfelder Fruchts~fte Petershans GmbH of Waiblingen-Bittenfeld, Germany installed a m o d e r n t w o - s t a g e d e c a n t e r system for juice extraction. The trial run was successful, so t h a t the system is entirely ready for use in the new season. The two Centridrink d e c a n t e r s with inline postextraction were supplied by KSln-based KHD Humboldt Wedag AG and its subsidiary in Bretten, Schmidt-Bretten GmbH. The new Centridrink decanter system in Bittenfeld replaces the existing band press for processing apples and pears into fruit juice. A yield of a b o u t 75--80% can be achieved in the first stage, w i t h o u t postextraction, and a yield of more t h a n 90% can be achieved in the second stage with postextraction. Both stages o p e r a t e w i t h o u t enzymes, which are also unnecessary for processing fruits in storage or fruit of low quality. Up to 15 t o n n e s of m a s h p e r h o u r can be processed. Decanters o p e r a t e fully continuously,
and have long been established in m a n y fields of application and in various industries because of their ability to operate continuously a r o u n d the clock. Over the p a s t few years, Schmidt-Bretten and KHD H u m b o l d t Wedag have systematically developed the process concept, and have marketed their Centridrink high-power decanter s e r i e s especially for u s e in fruit a n d vegetable p r o c e s s i n g . B e c a u s e of t h e i r convincing advantages over conventional presses, an increasing n u m b e r of Centrid r i n k d e c a n t e r s are n o w c o m i n g into operation. F u r t h e r advantages of this juice extraction technology are their compactness, the low proportion of p a r t s to wear out, long m a i n t e n a n c e intervals, s h o r t changeover times and low m a n p o w e r requirements. Decanters operate as a closed system, which can be cleaned and disinfected with little effort, and which is completely compatible with cleankin-place (CIP) cleaning. There are no dead angles, corners or rough surfaces where dirt can accumulate. During production r u n s Centridrink decanters stay as clean as the p r o d u c t r u n n i n g t h r o u g h them. This high level of hygiene is naturally of g r e a t i m p o r t a n c e for t h e f o o d s t u f f processing industry. All p a r t s which come in contact with the p r o d u c t are made of special steel. For especially sensitive products, it is possible to design the decanter to
be completely airtight with an inert gas covering. Oxidation and brown discoloration of the natural p r o d u c t s can t h u s be avoided. The fruit or vegetable m a s h is placed into a solid-bowl d r u m which runs at a high rotational speed. The centrifugal forces reach 2 6 0 0 - 3 3 0 0 times the acceleration due to gravity, which m e a n s t h a t the juice and p o m a c e are separated in seconds. The p r o d u c t is retained in the machine on[) briefly, and this e n h a n c e s its quality, sim'e no enzymatic changes (:an occur. Nearly all types of fruits and vegetabh,s can be processed in Centridrink decanters. Product changeover is fast and problem free. Furthermore, the machine p a r a m e t e r s can be a d a p t e d very precisely and optimally to process the different products.
The two-stage Centrid,rink decanter system for apple juice extraction, capable of processing 15 tonnes of apple mash per hour.
212
0015-1882/95/US$7.00 © 1995 Elsevier Science Ltd
March 1995
Filtration &
Separation
I
n the course of its 1993/94 season, Bittenfelder Fruchts~fte Petershans GmbH of Waiblingen-Bittenfeld, Germany installed a m o d e r n t w o - s t a g e d e c a n t e r system for juice extraction. The trial run was successful, so t h a t the system is entirely ready for use in the new season. The two Centridrink d e c a n t e r s with inline postextraction were supplied by KSln-based KHD Humboldt Wedag AG and its subsidiary in Bretten, Schmidt-Bretten GmbH. The new Centridrink decanter system in Bittenfeld replaces the existing band press for processing apples and pears into fruit juice. A yield of a b o u t 75--80% can be achieved in the first stage, w i t h o u t postextraction, and a yield of more t h a n 90% can be achieved in the second stage with postextraction. Both stages o p e r a t e w i t h o u t enzymes, which are also unnecessary for processing fruits in storage or fruit of low quality. Up to 15 t o n n e s of m a s h p e r h o u r can be processed. Decanters o p e r a t e fully continuously,
and have long been established in m a n y fields of application and in various industries because of their ability to operate continuously a r o u n d the clock. Over the p a s t few years, Schmidt-Bretten and KHD H u m b o l d t Wedag have systematically developed the process concept, and have marketed their Centridrink high-power decanter s e r i e s especially for u s e in fruit a n d vegetable p r o c e s s i n g . B e c a u s e of t h e i r convincing advantages over conventional presses, an increasing n u m b e r of Centrid r i n k d e c a n t e r s are n o w c o m i n g into operation. F u r t h e r advantages of this juice extraction technology are their compactness, the low proportion of p a r t s to wear out, long m a i n t e n a n c e intervals, s h o r t changeover times and low m a n p o w e r requirements. Decanters operate as a closed system, which can be cleaned and disinfected with little effort, and which is completely compatible with cleankin-place (CIP) cleaning. There are no dead angles, corners or rough surfaces where dirt can accumulate. During production r u n s Centridrink decanters stay as clean as the p r o d u c t r u n n i n g t h r o u g h them. This high level of hygiene is naturally of g r e a t i m p o r t a n c e for t h e f o o d s t u f f processing industry. All p a r t s which come in contact with the p r o d u c t are made of special steel. For especially sensitive products, it is possible to design the decanter to
be completely airtight with an inert gas covering. Oxidation and brown discoloration of the natural p r o d u c t s can t h u s be avoided. The fruit or vegetable m a s h is placed into a solid-bowl d r u m which runs at a high rotational speed. The centrifugal forces reach 2 6 0 0 - 3 3 0 0 times the acceleration due to gravity, which m e a n s t h a t the juice and p o m a c e are separated in seconds. The p r o d u c t is retained in the machine on[) briefly, and this e n h a n c e s its quality, sim'e no enzymatic changes (:an occur. Nearly all types of fruits and vegetabh,s can be processed in Centridrink decanters. Product changeover is fast and problem free. Furthermore, the machine p a r a m e t e r s can be a d a p t e d very precisely and optimally to process the different products.
The two-stage Centrid,rink decanter system for apple juice extraction, capable of processing 15 tonnes of apple mash per hour.
212
0015-1882/95/US$7.00 © 1995 Elsevier Science Ltd
March 1995
Filtration &
Separation