A AnoxKaldnes™ MBBR Combining microbiological expertise with decades of experience in wastewater processes enables us to improve on existing systems and to develop new processes. Aerobic Wastewater Treatment M Mectan™ The Mectan™ vortex grit system is a circular chamber that takes full advantage of the tangential inflow velocity along the peripheral wall of the chamber to assist in the grit removal process. Screening and Separation S SAM™ Type GDS The SAM™ grit dewatering screw is designed to provide easy and efficient separation of the grit from the liquid matrix, using an air or cyclone separator. Screening and Separation