Process Description

Process
Since 1993
Process Components
ACCUMULATOR
TANK
DeWRS
OUTLET
PLC &
SCADA
MEMBRANE
MODULE
PUMP
CONTROL
CHEMICAL
RINSE
INLET
SOLIDS DISCHARGE
TMP PUMP
16 MESH, 1.2mm
DIAMETER SCREEN
COMPRESSED
AIR INLET
FULL REMOTE CONTROL &
DATA LOGGING
* NOT ALL FEATURES REQUIRED IN ALL APPLICATIONS
Process Description
Raw water is screened for “frogs and logs” before entering the accumulator tank at the required rate. Water is then
pumped to the membrane module, in a cross flow arrangement; where nominally 50% of the flow is filtered and exits as
permeate. The balance of the flow is returned to the accumulator tank with the filtered concentrate. The valves on top of
the membrane module regulate TMP to maintain the accumulator tank level at its midpoint to ensure that water-in equals
water-out. Consequently, TMP is allowed to modulate over a range to ensure that flow rate requirements are achieved.
Over time the concentrate loop will accumulate higher levels of filtered material. When significant material has
accumulated and impacts the TMP to a high level an intermittent blow down will occur sending concentrate to DeWRS
where the concentrated material is further dewatered to a wet sludge; achieving zero liquid discharge. The membrane
module is frequently subjected to a dynamic shock to self-clean the membranes which inhibit fouling.
Process Utilities
Air
Energy
Internet
8 scfm/MGD / 14m³/hr/MLD @100psig *
150 kWhr/1,000,000 US Gal* (/0.25 MLD)
High Speed Static IP
*Estimates; Application & Size Dependent
www.Purifics.com
Complete Ultra Filtration
Continuous Online Direct
Membrane Integrity Test
APP SPECIFIC
Process Flow
INLET
The CUF MIT test involves continuous online
monitoring of turbidity using sensors on each
side of the membrane to verify the major delta
in NTU and consistency in both streams (no
spikes or rapid changes in turbidity). It is fully
automated and data logged to ensure
membrane integrity at all times.
HSCR
OUTLET
OIL
MEMBRANE
MODULE
Dynamic Shock
Purifics’ proprietary Dynamic Shock process
self-cleans the CUF membrane in a continuous
online operation. The energy shock is
generated and travels through the water and
membrane module to shock foulants off the
membrane surface.
Applications where DOC removal is required to remove
color and THM/HAA formation potential, a small amount of
coagulant is added to the raw water as it enters the
accumulator tank (HSCR), where coagulation occurs prior
to filtration. No upstream coagulation basins or clarifiers
are required, just the CUF platform.
Flux Maintenance
Over time, extended shut down or upset events, Flux may
not be fully recovered by dynamic shock alone. When this
occurs an automated Flux Maintenance Cycle is activated.
The TMP pump provides high cross-flow, the heater raises
the temperature and the flux maintenance chemical is
injected and circulated. Acid is used for inorganic
substances, caustic is used for organic substances. The
combination of heat, cross-flow velocity and pH shift is
used to scour and dissolve residual foulants from the
membrane. The flux maintenance fluid is discharged
through the blowdown line. When the cycle is complete
and 100% recovery is achieved, the system is brought
back online. This automated procedure takes about 20
minutes and occurs only when needed (daily or monthly
depending on the application).
Additions
In certain applications dissolved oxygen or a common
coagulant may be injected to oxidize or agglomerate
dissolved contaminants.
DeWRS
DeWRS (DeWatering Recovery System) continuously
concentrates the blow down solids in to a residue that in
many applications can pass the paint filter test. Zero Liquid
Discharge (ZLD) is achieved.
Remote Access
CUF utilizes a high speed internet connection with a static
IP or VPN access to a client supplied network. This allows
programming/SCADA updates and remote technical
support. The connection also allows the CUF to
automatically message pertinent plant personnel in the
event of a fault. If no landline access is available, cellular
alternatives are available.
340 Sovereign Road, London, ON, Canada, N6M 1A8
Ph: 519-473 5788, [email protected], www.Purifics.com
Protected by patents & patents pending, both domestic and foreign. Purifics, CUF, Photo-Cat AOP+ & DeWRS are registered trademarks.
DOC3034R3
Printed in Canada
High Solids Contact Reactor
TMP
PUMP

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