Which evaporator models are used in MKR's reference plants?

Mainly the thermal DV1000 and DV4000, plus earlier RT400 units, and the electric MVR15 — selected to match each plant's input material, heat availability and volume.

How long have MKR evaporators been treating digestate and slurry?

On residue and food-waste plants since 2014 — building on evaporation know-how that has been MKR's core business since 1997.

Does MKR have a zero-liquid (ZLD) reference?

Yes — an agricultural biogas plant where separated digestate is evaporated with a DV1000, ASL is recovered as mineral fertiliser, and the concentrate is dried together with the solids (partial-stream zero-liquid).

Can MKR treat media beyond slurry and digestate?

Yes — for example wash water from conditioning digestate fibres into a high-quality peat substitute, treated with an electric MVR15 that recovers about 93% as clean recirculation water.

How much volume reduction do the plants achieve?

Typically 5,000 to 20,000 m³ per year per plant, depending on input material and available heat.

Success from experience

Our references

For over a decade, MKR evaporators have been treating slurry and digestate on residue and food-waste plants across Europe. A selection of reference projects — with the evaporator used, the plant input and the achieved volume reduction.

* All data refers to results achieved under specific operational conditions. Actual efficiency may vary based on substrate composition and local plant setup. We recommend a laboratory evaluation of your sample before investment.

What are the use cases for MKR's evaporators?

MKR evaporators treat slurry and digestate across very different inputs — from food-waste and slaughter-waste plants to partial-stream zero-liquid digestate and wash water for peat-substitute production.

01

Multi-substrate food-waste AD plant (Switzerland)

1 × DV4000, 4-stage AD plant input: mainly restaurant food waste & machine-depackaged supermarket food, plus slaughter waste, grease-separator material and some pig slurry Context: a Swiss biogas plant co-digesting a broad, demanding substrate mix → robust digestate treatment essential Process: the 4-stage DV4000 reduces digestate using the plant's waste heat, recovering ASL as mineral fertiliser plus clean distillate — highest distillate efficiency of all references Heat demand: max. 600 kW · Efficiency: ~4.2–4.5 l/kWh (best) · Commissioning: early 2020 · Reduction: up to 20,000 m³/year (largest)

02

MVR — wash water from digestate-fibre conditioning (peat substitute)

Germany · 1 × MVR15 Throughput: 1.5 m³/h intake · 1.4 m³/h distillate (≈ 93% recovered as clean distillate) Energy efficiency: approx. 40 kWh per m³ distillate (≈ 25 l/kWh electric) Context/Process: digestate fibres separated → washed & conditioned into peat substitute → wash water (like thin slurry) evaporated → distillate back to the washing loop, concentrate keeps nutrients & solids (closed loop)

03

Full digestate treatment AD plant — Zero Liquid (partial stream)

· Germany · 1 × DV1000, 3-stage AD plant input: agricultural biogas plant fed mainly with slurry and farmyard manure Process: digestate is first separated → liquid phase evaporated → ASL recovered as mineral fertiliser → concentrate dried together with the solids (partial-stream ZLD) Heat demand: approx. 180 kW · Distillate efficiency: approx. 3.4–3.7 l/kWh · Commissioning: early 2021 · Reduction: approx. 5,000 m³/year

01

Multi-substrate food-waste AD plant (Switzerland)

1 × DV4000, 4-stage AD plant input: mainly restaurant food waste & machine-depackaged supermarket food, plus slaughter waste, grease-separator material and some pig slurry Context: a Swiss biogas plant co-digesting a broad, demanding substrate mix → robust digestate treatment essential Process: the 4-stage DV4000 reduces digestate using the plant's waste heat, recovering ASL as mineral fertiliser plus clean distillate — highest distillate efficiency of all references Heat demand: max. 600 kW · Efficiency: ~4.2–4.5 l/kWh (best) · Commissioning: early 2020 · Reduction: up to 20,000 m³/year (largest)

02

MVR — wash water from digestate-fibre conditioning (peat substitute)

Germany · 1 × MVR15 Throughput: 1.5 m³/h intake · 1.4 m³/h distillate (≈ 93% recovered as clean distillate) Energy efficiency: approx. 40 kWh per m³ distillate (≈ 25 l/kWh electric) Context/Process: digestate fibres separated → washed & conditioned into peat substitute → wash water (like thin slurry) evaporated → distillate back to the washing loop, concentrate keeps nutrients & solids (closed loop)

03

Full digestate treatment AD plant — Zero Liquid (partial stream)

· Germany · 1 × DV1000, 3-stage AD plant input: agricultural biogas plant fed mainly with slurry and farmyard manure Process: digestate is first separated → liquid phase evaporated → ASL recovered as mineral fertiliser → concentrate dried together with the solids (partial-stream ZLD) Heat demand: approx. 180 kW · Distillate efficiency: approx. 3.4–3.7 l/kWh · Commissioning: early 2021 · Reduction: approx. 5,000 m³/year

Frequently asked questions

References

Let's design a concept for your project!

Get in touch

Evaporator calculator