Short description |
Mechanical Vapor Recompression (MVR) is an energy-saving evaporative concentration technology, which reduces evaporation energy use by 90% or more. MVR uses energy recovered from the condensate to create a pure liquid distillate and a concentrated product/waste. The technology is proven in food processing, and being piloted in farming in an adapted configuration.
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Best Available Technique: |
Not indicated |
Objective |
The purpose is to recover nitrogen from liquid manures and other liquid waste streams in the form of Ammonia Sulphate Solution (ASS).
It is in the same time an important objective to avoid a waste stream of the distillate, which is a technically clean waterto be used for instance for irrigation.
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Level of complexity |
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Usual scale |
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Innovation stage |
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General diagram |
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Applied to |
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Typical technology combinations |
The MVR processing require liquid influent streams, such as separation liquids, for instance on basis of liquid manures or digestate from an anaerobic digestion process.
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Pictures |
![](/images/uploads/MVR.jpg) An isometric drawing of SYNECO's mobile MVR pilot unit for processing separation liquids based on digestate.
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Theroetical fundamentals and process description |
MVR uses energy recovered from the condensate to create a pure liquid distillate and a concentrated product/waste.
- From Boyle’s law it is known for a gas that PV/T (Pressure * Volume / Temperature) is constant (PV/T=K). During compression of vapor, the pressure and temperature increase. From this, the heat energy can be reused.
- The energy normally lost in the compression is recovered, leading to a highly-efficient evaporation process.
- Since this compression is realized by a simple mechanical compressor, the process is called MVR.
- End/by-product 1 - explanation: Ammonia Sulphate Solution (ASS)
- End/by-product 2 - explanation:Technically clean water
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Environmental effects |
Effects on air (emissions):
The recovery of nitrogen will first of all remove ammonia, which thus reduces ammonia evaporation from liquid waste streams like digestate.
Data about the environmental effects will be produced by the SYNECO project.
Effects on water/soil (and management):
The recovery of nitrogen will first of all remove ammonia and ammonium, which thus reduces nitrogen ,losses to the aquatic environment.
Data about the environmental effects will be produced by the SYNECO project.
Other effects:
Not indicated
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Biosecurity aspects |
Not indicated |
Technical indicators |
Conversion efficiency:
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Observations |
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Economic indicators (Economic figures are rough indications, which cannot be used for individual project planning) |
Investment cost: SYNECO's mobile MVR pilot unit has a price of € 50,000.
Operational costs - explanation: Data about the costs will be produced by the SYNECO project.
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Literature references |
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Real scale installation references |
A mobile unit is piloted by the SYNECO project in Malta (https://www.synecomalta.com) at the St Rita Farm, Triq San Stiefnu, Qormi, Malta. |
Examples of suppliers |
- deLaval - https://www.delaval.com/
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