The Polymer Control System (PCS5500XRD) helps to
reduce polymer costs, improve cake dryness, and optimize
the dewatering process. The PCS5500 measures electrokinetic
charge of a continuous sample. This streaming current
reading can be used to automatically control feed
pump output for optimum polymer dosage.
The ideal situation in any wastewater treatment
system is steady state conditions: constant solids,
concentration (and type), and constant chemical feed.
This is rarely the case. As solids holding vessels
are filled and pumped out, flow rates and solids concentrations
change. Polymer make-up
may not always be the same, nor pump rate consistent.
It is impossible for the equipment operator to keep
up with these changes and adjust flocculant dosages
accordingly. Therefore, the tendency is to overfeed
to smooth out the bumps.
This overfeed can amount to a sizeable amount of money
annually. Polymer costs in many sludge dewatering
operations is a major concern. Although new and improved
methods are continually being developed to dewater
sludge, most equipment still requires polymer to attain
desired throughput and cake dryness. If improvement
in cake dryness can be obtained with less polymer,
the savings in large plants can be enormous, especially
when the cake is being incinerated or hauled to a
landfill.
SYSTEM DESCRIPTION
The
PCS 5500 continuously measures electrokinetic charge
in a filtrate/centrate and indicates on a digital meter
the numerical charge value that corresponds to optimum
polymer dose. The PCS 5500 is capable of automatically
controlling polymer feed to a centrifuge on a continuous
basis to maintain a fixed charge value (setpoint).
BENEFITS
Reduce
Polymer Costs
Reduce
Hauling Costs
Reduce
Incineration Costs
Reduce
Solids Recycle
Improve
Machine Runnability
Reduce
Maintenance Cost
STANDARD FEATURES
Patented Sensor Design
Microprocessor Technology
Quick Replacement Probe
& Piston
Self-Diagnostic Sensor
High-Volume Flow Minimizes
Sensor Fouling
SmartTrac PID Control
Sensor Maintenance
Module (S.M.M.)
Web Access Controller
(W.A.C.)
OPERATION
The System optimizes polymer dosage
on biosolids / residuals dewatering machines. The Sensor
responds to changes in mass flow,
solid levels / characteristics, and automatically maintains
the proper polymer feed.
MEASUREMENT PRINCIPLE
The System uses streaming current measurement
to maintain proper charge in the filtrate/centrate sample,
thereby inimizing residual polymer (overfeed).
SYSTEM COMPONENTS
Monitor
Backlit LCD
Keypad Interface
Auxiliary I/Os, analog
and digital
Control signals to
SMM
DuraTrac
II Sensor
High flow/throughput
design, 10 GPM
Industrial grade motor
Quick replacement probe
and piston
Web Access
Controller (W.A.C.)
Data logging/Storage
Access Via Web Browser
Stand Alone, Intranet,
Internet Capability
Various Security Levels for Access/Control
