The Kruger NEOSEP Membrane Bioreactor (MBR) received acceptance from the California Department of Health Services as an acceptable filtration technology for compliance with the State of California Water Recycling Criteria (Title 22).

For MBR technology to achieve Title 22 approval, the filtered effluent should not exceed a turbidity of 0.2 NTU for more than 5 percent of the time during a 24-hour period and should not exceed a turbidity of 0.5 NTU at anytime. The NEOSEP system far surpassed the Title 22 criteria by achieving turbidity readings less than 0.05 NTU for 100% of samples taken during the testing period.

The NEOSEP system was tested at the Point Loma Waste Water Treatment Plant in San Diego, CA and evaluated for an operational period of approximately 1,200 hours. The testing period included a steady state operation at the membrane system design flux and a 6 day peaking test where the membrane operated at flux rates two times design for a period of two hours in the morning and two hours in the evening. The peaking events helped to simulate the diurnal events that occur daily at a full scale waste water treatment facility. Based on the NEOSEP systems ability to maintain excellent effluent quality and steady operating pressures during the peaking conditions, it was approved for a typical design flux of 17 to 38 gfd (28.8 to 64.5 LMH).

In addition to its exceptional effluent turbidity results, NEOSEP also achieved effluent BOD₅ values below the detection limit of 2 mg/L for all samples collected during the study as well as complete nitrification. Based on the tight pore structure of the NEOSEP™ Flat Sheet membrane, 0.08 micron pore size with a standard deviation of 0.03 µm, the unit achieved more than 3.0-log removal of MS2 virus for more than 50% of the samples before and after cleaning the membranes.