PlanetTEK Environment and Treatment Technologies, Inc. PlanetDISK® Biological Waste Water Treatment Systems CE Certified German patented RBC systems manufactured by PlanetTEK in Türkiye. PlanetDISK® utilizes probably the most reliable waste water treatment technology across the world, operating with the Rotating Biological Contactor (RBC) method. This modular system, which is originally German, provides solutions for small settlements with no central waste water treatment system such as villages, housing estates, refugee camps and touristic facilities. . The system also treats the waste water and allows for reuse as irrigation water or flushing water in toilets. Although there are RBC Plants as large as 750,000 people capacity in the USA and Europe, it is more common for smaller capacities upto 20,000 people with low running expenses and maintanence costs.