GE P&W Membrane Bioreactor (MBR) - LEAPprimary - Manual (Page 3)

Case Studies
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An existing MBR facility in Southern Ontario was built with a conventional 2 mm fine screen as primary treatment. In
February 2013 the fine screen was replaced with a LEAPprimary system to demonstrate the impact that the LEAPprimary
technology would have upon mixed liquor characteristics and ZeeWeed membrane performance.
The LEAPprimary system proved to have a positive impact on the membrane performance by enhancing the removal of
particulate material from the wastewater prior to the MBR. Trash content (material in the mixed liquor greater than 2 mm
in size) was 60 mg/L prior to the installation of the LEAPprimary unit. One month after the fine screen was replaced with
LEAPprimary the trash content reduced to near zero, which indicates that the material that could reduce ZeeWeed
membrane life had been removed from the process.
Process testing was also performed to quantify the TSS and BOD removal of the LEAPprimary
system. TSS and COD removal were measured at 50% and 25% respectively. The impact of this
was a reduction in the air demand for biological process aeration in the bioreactor. The solids
that were retained by the LEAPprimary system were dewatered to a concentration of 25% to
30% dry matter.
Enahanced ZeeWeed membrane performance, lower energy demand and simplified operation
were successfully demonstrated for LEAPprimary at this installation.
Facility in Southern
Ontario, Canada
GEA30891 (10/2013)