Anua MBR achieves California Title 22 approval

The PuraM® membrane bioreactor made by Anua (formerly Bord na Móna) of Greensboro, USA, has been approved as an alternative filtration technology by the State of California.

The Title 22 regulation from the California Department of Health requires technologies to meet certain criteria for recycled water applications.

North Carolina State University tested the PuraM at the Bord na Móna Innovation Center at the TZ Osborne Water Reclamation Facility in Greensboro to confirm compliance under Title 22. The testing showed that the MBR system met or surpassed the requirements.

The PuraM MBR uses flat-plate membranes assembled into 50-plate membrane cassettes submerged vertically in an activated sludge aeration basin. It has a polyethersulfone ultrafiltration membrane with a polyethylene/polypropylene backing material.

The nominal pore size is 0.05 microns with an operational flux rate of 11 gpd/ft² (0.45 m³/d/m²). The system, which does not require back-pulse cleaning or routine chemical cleans, achieves reuse quality water with biochemical oxygen demand, total suspended solids and total nitrogen levels of less than 5 mg/l.

The PuraM MBR is engineered specifically for the decentralized municipal and commercial water-reuse market.

“We’re especially proud of this approval, as Title 22 is the highest standard against which reuse technologies are measured,” said Anua president Shane Keaney.