Polypropylene plates
The evaporator core is built from PP plates. Plastic does not corrode, so no expensive alloys or anti-corrosion chemicals are needed.
Plate-based vacuum evaporation
Multi-effect evaporation with the lowest Total Cost of Ownership.
EvaPlate is developing a compact evaporator for wastewater and process streams. It is built from a stack of polypropylene plates instead of special metal alloys, runs fully electric on a water-to-water heat pump and fits inside a shipping container. Affordable evaporation, for the low/mid volume range.
1–6 effectsConfigurable per application, more on request
PP platesPolypropylene plate stack, no steel in the evaporator core
Heat pumpWater-to-water heat pump supplies heat and cooling
ContainerDelivered as a complete, movable unit
Status · Oct 2026
EvaPlate is in development and not yet commercially available. Over the past year we tested a first generation of plates in a pilot. We are now finishing the second plate design (V2), which goes into a 100 L/h pilot at the end of 2026. We aim for commercial availability of the first evaporators at the end of 2027.
This page explains what we are building and where the project stands. It will be updated as test results come in.
Technology
The same vapour, used again and again.
EvaPlate is a multi-effect evaporator (MED) of the falling-film type. It runs under vacuum, so water boils at low temperatures. That is what lets us build the evaporator from plastic. The number of effects can be chosen from 1 to 6, or more if required.
Falling film on plastic
Feed liquid runs down the evaporation plates as a thin film. On the other side of a thin heat-transfer layer, vapour from the previous stage condenses and gives up its heat, which boils part of the film.
1 to 6 effects in one stack
Each effect runs at a lower pressure and temperature than the one before, and its vapour heats the next. More effects reuse the energy more often. Fewer effects keep the unit smaller. The choice depends on the application.
Heat pump closes the loop
The heat pump's hot side drives the preheater. Its cold side cools the final condenser. The heat removed at the cold end is lifted and returned to the hot end, so no steam boiler or cooling tower is needed.
Design principles
Built to be accessible.
Most evaporators are welded vessels of special alloys, hard to reach inside and prone to corrosion and fouling. EvaPlate takes a different route, borrowing from the plate-and-frame filter press. Every principle below aims at a lower cost over the lifetime of the unit.
Opens like a filter press
Release the clamping and slide the plates apart. The heat-transfer surfaces can be inspected, cleaned or replaced on site, by your own staff.
Scales by plate count
Each evaporation plate is designed for about 20 L/h of condensate. Capacity is set by how many plates sit in the stack.
Electric, heat-pump driven
Heating and cooling come from one water-to-water heat pump. No steam boiler, no gas, no separate cooling supply: just a power connection.
Containerised
Stack, heat exchangers, pumps and controls are laid out to fit a shipping container, so a unit can be delivered complete and moved between sites.
Designed for recycling
The plates are made from a single polymer type, so the evaporation core can be recycled at the end of its service life.
Development
From first plates to commercial evaporators.
All tests use a water-to-water heat pump as the source of heat and cooling, the same setup the full-size units will use. The plates are developed and produced together with our partner Kuypers Kunststoftechniek.
- 2026
Pilot with V1 plates Done
First generation of plates tested in a pilot setup over the past year. The results feed directly into the second plate design.
- Now
V2 plate design In progress
A redesigned plate with improved sealing, frame stiffness and easier replacement of the heat-transfer surfaces.
- End of 2026
100 L/h pilot Next
V2 plates built into a new four-effect pilot producing 100 litres of condensate per hour.
- 2027
EVA-500 and EVA-1000 Planned
Both full-size evaporators are built and tested: the EVA-500 (500 L/h condensate, 20 ft container) and the EVA-1000 (1,000 L/h condensate, 40 ft high-cube container).
- End of 2027
Commercial availability Target
First evaporators available to customers.
Applications
Where EvaPlate fits.
Industrial streams in the lower volume range, where conventional evaporators are too expensive to run.
Four ways it pays off
Less disposal
Smaller volume to transport and treat off-site.
Concentrate to sell
Recovered nutrients or chemicals as a product.
Reuse in the process
Concentrate goes back into production, towards zero liquid discharge.
Clean water
Distilled water for reuse, or as drinking water.
Application areas
- AgricultureDigestate, liquid manure fraction, ammonium salts
- Food & dairyCheese brine and whey streams
- Salt and brine regenerationProcess baths and functional brines such as sulphate and chloride salts
- Chemical wastewaterCorrosive, alkaline or soap-rich streams
- Fertiliser and nutrient solutionsFinal concentration step, for example after reverse osmosis
- Decentralised water productionSeawater and water-from-air systems at remote sites
Development partner
Kuypers Kunststoftechniek BV is an engineering and manufacturing partner of EvaPlate.