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What is Vacuum Evaporation?

21st October 2021

If you’ve read our recent blog post or have seen on our British Aqua Feeds social media channels, you might have noticed that we are proud owners of a Vacuum Evaporator that has been added to the hydrolysis line. If you didn’t know, this technique strips excess moisture from our liquid hydrolysates, thus enabling British Aqua Feeds to produce products to exact specifications.

However, what exactly is Vacuum evaporation? Read on to learn more about this technique.


What is Vacuum Evaporation? 

This is a technique used to transform liquid effluent into two flows, one of high-quality water and the other comprising a concentrated waste. The water obtained is of sufficiently high quality, which is to be used, whereas the waste can be concentrated, even reaching total dryness. This is extremely good for the environment, as waste management costs will decrease greatly when concentrating the waste to this extent.

We are proud to be at the forefront of this technology, it’s a breakthrough in treatment of liquid effluents as it allows effluents that cannot viably be treated by biological techniques to be treated in a clean and efficient manner that is safe and compact for the environment.

 “Vacuum Evaporation results in dramatic reductions of Liquid Waste”Callum Wilson, Director of British Aqua Feeds.

 The concentration of corrosive or scale-producing waste, the reuse of water recovered and the implementation of zero liquid waste, evaporation is a unit operation that consists of concentrating a solution by eliminating the solvent by boiling.

For example, this is performed by having the pressure lower than the atmospheric pressure. Thus, the boiling temperature is much lower than at atmospheric pressure. This results in notable energy savings.

Vacuum Evaporation is efficient and competitive 

The technology is efficient and competitive, which provides very good results to treating those effluents that prove complicated to treat using other techniques. Vacuum Evaporation allows the implementation of zero waste policies, with all their inherently positive environmental repercussions.

However, because of the lower quantity of waste generated and the production of a high-quality water flow, the initial investment is recovered relatively quickly. Furthermore, this will be even faster if excess energy from another process can be used.

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