BAT stands for “Best Available Technology” and refers to technologies and processes that represent the current state of the art in environmental protection. In the field of BAT wastewater, this includes systems and processes that enable particularly efficient, resource-saving, and environmentally friendly treatment of industrial wastewater. These processes are defined and described in the EU's BREF documents (Best Available Techniques Reference Documents).

By following the BAT recommendations, companies can improve their wastewater quality and more easily comply with environmental regulations. Examples of such processes include modern evaporator systems or filtration technology from MKR Metzger, which are designed for high efficiency and durability.