News & developments

Reverse osmosis (RO) comes from drinking and process water treatment. On the liquid fraction of digestate it needs ultrafiltration (UF) in front, frequent membrane cleaning, and it recovers around half of the volume as permeate. The rest is a concentrate that still has to be stored, hauled or treated. An evaporator takes out up to 90 % with MVR on thin fractions up to 2.2 % DS, or around two thirds with a thermal evaporator on waste heat, and binds the ammonia as ASL.

On a food-waste AD plant in eastern Switzerland, a 4-stage thermal vacuum evaporator closes the loop from restaurant leftovers to the field. It takes around 40 m³ of water a day out of the liquid digestate, recovers the nitrogen as ammonium sulphate solution (ASL) for a liquid fertiliser, keeps the nutrient concentrate usable for organic farming and returns all distillate as process water to the plant's own de-packaging line. Reduce. Recover. Reuse. On one site, in operation

Short answer: On our reference plant, a food-waste AD plant in Switzerland, our 4-stage thermal vacuum evaporator (DV series) turns around 350 kW of CHP waste heat into around 40 m³ of distillate per day, or 4.5 to 4.7 litres per kWh. Over 51 complete operating days it was evaporating 82 % of the time, runs unattended at night and at weekends and needs about 1.5 hours of staff time per day. The heat transfer stayed stable from August to October, with a planned acid and alkali

On 9 February 2026, the European Commission adopted an amendment to the Nitrates Directive (Commission Directive (EU) 2026/288). It allows Member States to let farmers apply certain nitrogen fertilisers recovered from livestock manure, known as RENURE, on top of the existing limit for manure. For biogas plant operators and livestock farms, this opens new options for nutrient recovery. This post explains what RENURE is, what has changed, where it already applies and what role

Steigende Lager- und Transportkosten, strengere Düngeverordnungen und ein Überschuss an Nährstoffen: Für Betreiber von Biogasanlagen und Tierhaltungsbetriebe wird die Verwertung von Gülle und Gärrest zur wachsenden Herausforderung. MKR Cleanwater bietet dafür eine Lösung, die das Problem in einen Wertstoff verwandelt, und zwar mit thermischen Vakuumverdampfern (DV) und elektrischen MVR-Verdampfern, die das Volumen um rund zwei Drittel (DV) bzw. um bis zu 90 % bei dünnflüssige

Schweinegülle fällt in großen Mengen an und stellt Betriebe vor wachsende Herausforderungen: steigende Lager- und Transportkosten, hohe Stickstoffeinträge und begrenzte Ausbringungsflächen. MKR Cleanwater bietet dafür eine Lösung, die das Volumen der dünnen Flüssigphase (bis 2,2 % TS) um bis zu 90 % reduziert und daraus einen verwertbaren Dünger gewinnt, mit der elektrischen MVR-Serie, die rein mit Strom arbeitet und keine Abwärme benötigt. Die Herausforderung: Schweinegülle