|
CFSD - Sand Filters
Petwa's sand filters are an economical filter for removing
silt, turbidity, suspended matter and rust particles within
the range of 25 - 30 microns. Sand filter media beds are
supported by a layered gravel base covering the distributor
for ideal service and backwash flow distribution.
CFMM - Multi-Media Filters
Petwa's multi-media filters are an advanced type of filter
to deal within the range of 15 - 20 microns. Multi-media
filter media beds are supported by a layered gravel base
covering the distributor for ideal service and backwash
flow distribution. The active filtering media consists of
layered garnet sands, filter sand and anthracite to provide
effective filtration, while allowing higher service flow
rates with a smaller pressure drop than a conventional sand
filter. The layered medias also provide a greater holding
capacity due to better depth filtration.
CFAC - Activated Carbon Filters
Petwa's activated carbon filters are used for the adsorption
of undesirable tastes and odours in water caused by dissolved
or suspended organic matter. Activated carbon can also be
used for the removal of chlorine. Applications include pretreatment
for reverse osmosis systems and food and beverage equipment.
The activated carbon media is supported by a layered gravel
base covering the distributor for ideal service and backwash
flow distribution.
CFMG - Manganese Greensand Filters
Petwa's manganese greensand filters are used for the oxidation
and filtration of dissolved iron, manganeseand hydrogen
sulfide gas from water. This is accomplished by the use
of a continuous regeneration process, where a solution of
potassium permanganate is fed upstream with a chemical feed
pump. The filter bed is also supplemented by a layer of
anthracite which provides an initial coarser filtration
prior to the manganese greensand media, finally supported
by a layered gravel base covering the distributor for ideal
service and backwash flow distribution.
|
