Acquen Acqua-Engineering Gmbh

aquen aqua-engineering GmbH is a German technology company based in Clausthal-Zellerfeld that develops and manufactures proprietary equipment for sewage sludge treatment, flocculation optimization, and phosphate precipitation. The company originated as a spin-off of CUTEC (Clausthaler Umwelttechnik-Institut GmbH) and holds international patents on its core processes. aquen's product portfolio centers on conditioning and dewatering of municipal and industrial sewage sludge, with nine distinct product lines. The FlocFormer is a flocculation unit that optimizes floc structure for downstream dewatering machines, while the FlocFormer+ adds enhanced dewatering capability for sludges with permanently changing parameters. Polymer preparation is handled by the FlocStirr inline mixer, designed around 11 specific engineering requirements derived from testing across diverse sludges and polymers. Process monitoring is addressed through the FlocSens photo-optical sensor family: the FlocSens real-time inline sensor, FlocSens Lab for laboratory evaluation of dewaterability, and FlocSens Pro for professional field deployment — all using floc image analysis to quantify conditioning quality before dewatering. For phosphorus removal, the FlocPhos unit achieves discharge targets of 0.4 mg/l phosphate through optimized precipitation mixing. The geoCLEA mobile dewatering system serves geothermal and well-drilling applications, processing 5-7 m³/h per borehole and replacing traditional sedimentation vessel setups. aquen also provides consulting, engineering, assembly, commissioning, and maintenance services, and applies its separation technology to agricultural nutrient recovery from liquid manure and digestate.