BIODEC™ SBR decanters boasts of only one moving part which is a simple small diameter three-way motorized ball valve. The vertical movement of the decanter is done by injecting or releasing pressurized air into the body of the decanter. The levels of the decanter can be adjusted on site easily to suit local conditions. This air powered decanter can be driven by the plant’s aeration system, thereby eliminating the need for any complex equipment.