This project aimed to reduce drinking water consumption and wastewater amount to be discharged to sewer through recycling greywater for internal re-use in a four star hotel in Germany. A new greywater biological treatment technology was trailed and demonstrated for the first time: Greywater from baths/showers in the guest rooms is separately collected and transferred to settling tanks. After preliminary sedimentation the greywater is treated continuously in a six-stage Rotating Biological Contactor (RBC) system.
GTZ (2006): Greywater recycling in Hotel Arabella Sheraton Am Buesing Palais Offenbach, Germany. (= data sheets for ecosan projects , 18 ). Eschborn: German Agency for Technical Cooperation (GTZ) URL [Accessed: 03.06.2019]