Shut Down; Mbr Temporary Shut Down; Mbr Permanent Shut Down / Winterizing; Process Shut Down Procedure - ProMinent DULCOMETER PH-501 Assembly And Operating Instructions Manual

8.0 SHUT DOWN

8.1 MBR Temporary Shut Down

A temporary shutdown for a few days requires continuous aeration of the biomass to keep the
DO level at least 2 mg/L and continuous biomass recycle between the bioreactors.

8.2 MBR Permanent Shut Down / Winterizing

Permanent shut down is required if system operation stops for at least 2 weeks without inflow.
Permanent shut down includes the following procedure:

8.2.1 Process Shut Down Procedure

Conduct a "Backwash Now" operation on the system
Stop influent flow into the System
Ensure all pumps are in the "OFF" position using the HOA HMI screen
Ensure all Blowers are in the "AUTO" position using the HOA HMI screen. This is to be
done until a vacuum truck can be provided or contracted locally to clean out the tanks.
Ensure all automated valves are in the "OFF" position using the HOA HMI screen.
Ensure that the MBR is disabled using the HMI screen button
Conduct all maintenance procedures on Section 7 Table – regardless of schedule time

8.2.2 Cleaning - General

Conduct general system interior cleaning
Open all tanks, wash out with a garden hose and Vacuum out.
Clean all sensors and level switches

8.2.3 Membranes

Ensure that the membrane tanks (TNK-601/602) are drained before opening the membrane
tanks.
Open TNK-601/602 doors with hand/power tools.
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