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Water re-use and wastewater reduction.

Despite the Earth being made up of 90% water, clean water remains a precious resource, which for industrial scale users such as food and drink manufacturers and vegetable processors, represents a significant proportion of business operating costs.

As consumer demand for washed vegetables and value enhanced food products increases, the demand processors make upon this resource will also continue to rise.

In March 2005 it became mandatory for European companies involved in the treating and processing of vegetable and raw food materials to be registered and authorised under Integrated Pollution Prevention & Control (IPPC). Compromise on hygiene and food safety are not an option in the drive for economy with the separation and recirculation of process waste waters, even with the introduction of Best Available Techniques (BAT) as guideline criteria.

Separation of solids from liquids using centrifuge decanters offers an effective means of recycling waste water streams. When considered at industrial scale this creates real opportunities for savings in water consumption and final disposal volumes.

Under specific conditions within the centrifuge, suspended solids matter such as vegetable particles or soil or milk products, which have been left behind by the cleaning and processing operations, can be separated. Using a decanter centrifuge can reduce the total volume of waste by as much as two thirds and this is impressive when considering waste is normally disposed of with a cost per tonne penalty to the business.

Westfalia Separator's long lasting commitment to providing industry with leading process technology has been demonstrated by the introduction of the AD0509 'Crocodile', and the subsequent new improved range of machines.

A primary feature of these decanter centrifuges is the patented 2-Gear Drive, which closely regulates the scroll drive. This allows a high performance level and consistent solids to be achieved from the decanter, despite maybe a fluctuating solids volume in the feed or solids which are difficult to convey.

The new range of decanter centrifuges from Westfalia Separator removes solids from process and washwater streams. When this is done the clarified water (known as centrate) is treated to prevent oxidisation and can the be re-introduced into an earlier part of the process. The discharged solids which can be rich in carbohydrate, fats or protein can be collected and disposed of as normal at reduced volume, or sold as a premium price product such as animal feed.

Recycling water at the cleaning process stage can result in as much as a 95% water saving. Such savings are not only a benefit to the environment, but also provide the business with reductions in overall cost and an increase in competitiveness within the marketplace.

Westfalia Separator Ltd on tel: 08708 305500 or visit
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Title Annotation:PLANT
Publication:Food Trade Review
Date:Oct 1, 2005
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