Yes 25 gpm U.S. during permeate cycle. And yes psi on the suction side.
The manufacturer recommended a cleaning every 6 months but then we were told that we should only do a cleaning when
the pressure differential was a -5 or so. The only CIP, since the new plates were installed in March 2018...
The flow rate is about 25 gpm and the total surface area of both cassettes is 280m2. There is no back pulse on this system,
but continuous air flow up through the plates.
It has a permeate cycle then an air scour cycle with the permeates off. It has been running a maximum of 3 minutes permeate...
We replaced the plates in a two cassette MBR with 100 plates each in March 2018. Within the last 3 months we have had to tie off multiple plates due to failures.
The TSS is kept between 11000 and 13000 mg/l. The daily flows are between 20000 and 30000 gals. We have the system set at about 25 gpm...
