PlanetDISK Biological Sewage Treatment Plant is on the way to Gaborone, Botswana with capacity 30 m3/day. Plug- and – treat in a 20 ft container. We have been serving the planet for 15 years now with our expertise and knowledge in wastewater treatment. Our engineers are working so hard to make this planet a better place in more than 20 countries all around the world.