For agricultural company Groenewoud B.V. in Sint-Oedenrode, Circular Values built a nitrogen stripper of the Quadro 4 type. Groenewoud has a biogas installation. Cow manure is fermented on this site after which the manure is separated into thin slurry. The manure is then separated into a thin and thick fraction by means of a decanter. The thin then goes to the nitrogen stripper. The stationary Quadro 4 stripper has a capacity of 4 m³ per hour and in the stripper lime is used to increase the pH. with lime. Circular Values also supplied the lime bunker needed for this supplied.