MBBR Bio Media HDPE Biofilm Carrier for Plant Capacity Upgrade MBBR Bio Media | HDPE Biofilm Carrier for WWTP & ETP Upgrade Product Overview This MBBR bio media is a virgin HDPE biofilm carrier filter media used to upgrade and expand the capacity of existing WWTP and ETP plants. By adding suspended biofilm carriers at 800 m²/m³ specific surface area, plants increase treatment capacity without building new tanks, a cost-effective retrofit for facilities in Latin America, South