HDPE MBBR Wastewater Treatment Filter Media for Latin American Municipal Sewage Plants Our HDPE MBBR Filter Media (Model BM-MF800) is a high-performance wastewater treatment filter media engineered specifically for municipal sewage treatment plants serving communities across Latin America . Manufactured from virgin HDPE, these biofilm carriers deliver 800 m²/m³ of protected surface area for rapid microbial colonization, enabling compact reactor designs that comply with CONAMA