|
MIXED - BED FILTERING SYSTEMS USING A CONTINUOUS WASH TRAVELING BRIDGE -
PUMLAC ®
This Knd of filter has been designed for tertiary treatments , alone or in
combination with other processes and equipment, starting with purified waste
water coming from secondary treatments .
The PUMLAC ® Traveling bridge is a descending flow gravity filter system
that uses a granular filter and has a low head loss. The main application of
these systems is filtering the secondary effluent in urban waste water treatment
systems , although they are also suitable for filtering water coming from other
processes. If special modification are made to the equipment , it can be used
for filtering potable water .
The low head loss of the filter allows operating with a manometric head of
just 60 - 70 cm this makes it the ideal system for applications with an
unlimited hydraulic profile.
The design and operation of a CONTINUOS WASH TRAVELING BRIDGE filter are
quite different from other kinds of filtering devices . Thanks to the unique
feactures of the PUMLAC ® filters , they are among the filtering options with
the lowest investment and installation costs , without thereby failing to
perform similary to other , more costly systems .
Nature and Characteristics of the Slurry
In order to Stablish the following input caracteristics its necesary a
complete process before entry into the PUMLAC ® ha to be designed , wich
consists of COAGULATION and FLOCULATION and followed by LAMELLAR SETTLING
Solids in suspension < 15 mg/l
BOD5 < 20 mg/l
Turbidity < 10
With these input values , the following output values from the PUMLAC ® are
guaranteed.
Sólidos en Suspensión < 5 mg/l
DBO5 < 10 mg/l
Turbidez < 2
|