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Brewing, Drink and Dairy Processing News
News Release from: APV | Subject: SCW/SCP Process
Edited by the Processingtalk Editorial
Team on 06 May 2003
Efficient processing of whey and
permeate
APV Anhydro, part of Invensys, has developed a continuous process for highly efficient processing of the whey and permeate by-products from cheese production, with less energy use
Increasing cheese production world-wide is resulting in a large quantity of whey This is mostly converted into whey protein concentrate (WPC) by means of ultra-filtration (UF), which creates almost as many kilos of the by-product permeate as the ultra-filtrated whey itself
This article was originally published on Processingtalk on 10 Jan 2005 at 8.00am (UK)
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Large quantities of whey and permeate cannot be utilised, presenting an environmental issue.
In order to overcome this increasing problem, APV Anhydro, part of Invensys, has developed a continuous process for highly efficient processing of both whey and permeate into valuable products.
This process, which has been patented by Anhydro, is known as the "SCW-" or "SCP-" process, which stands for Super Concentrated Whey and Super Concentrated Permeate.
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Traditionally whey and permeate are converted into powder by means of evaporating to 60% and 65% solids respectively.
The crystallisation process follows for a period of 10-15 hours in order to achieve the correct level of crystallisation before the liquid passes to the spray dryer.
Highly efficient crystallisation of the lactose in whey and permeate concentrates can be obtained quickly by concentration to higher solid content in the final evaporation process.
Based on the above premise, the SCW/SCP-process makes it possible to concentrate whey and permeate up to 68-72% solids and 78-82% solids respectively by using a Paraflash evaporator as a finisher.
The need for crystallisation tanks and chilled water for the crystallisation process is eliminated, since the process runs continuously from the finisher into the spray dryer.
It passes through a buffer tank, where the feed is cooled from around 70C to 55C to achieve sufficient crystallisation of the product.
Niels Kristian Stevn, Technology Manager, Anhydro, says: "We are excited by the new SCW/SCP process, because it provides a quick and efficient system, which may result in considerable energy savings.
Also, because the system uses a smaller spray dryer than traditional methods, and installation and building costs are generally lower, the overall investment can be greatly reduced".
Existing spray dryers can be upgraded to the SCW/SCP-process resulting in highly increased powder throughput.
Quick, clean and easy to maintain, the new Anhydro SCW/SCP system offers an alternative method for the treatment of whey and permeate, which has clear environmental advantages over traditional methods in terms of energy conservation.
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