A AnoxKaldnes Hybas™ A biological wastewater treatment solution combining activated sludge and moving bed biofilm reactor (MBBR) processes for nitrogen removal. Aerobic Wastewater Treatment AnoxKaldnes™ Z-MBBR Veolia Water Technologies AnoxKaldnes has launched a new generation of biofilm carriers for moving bed biofilm reactors: AnoxKaldnes Z-MBBR. The new carrier is the result of two decades of development work. Aerobic Wastewater Treatment W Whittier™ Candle Filters The Auto-Shok and Auto-Pulse Filters are classical tubular filters, also known as Candle Filters Filtration