Bulletin No. 2700.1
6739 S. Washington Ave., Whittier, CA 90601
(800) 926-3426
(562) 945-3425
Fax (562) 693-5257
e-mail pureflow@pfdiv.com
Web Site www.pfdiv.com
SELENIUM REMOVAL
WITH
ACTIVATED ALUMINA
THE PUREFLOW© SYSTEM FOR THE
REMOVAL OF SELENIUM from drinking
water supplies is an improved design for the
water treatment industry. A highly adsorptive
activated alumina media, and chemical
treatment system, combine to provide a simple,
safe, compact process, with automatic controls,
that requires minimum attendance by
operations personnel.
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USER FRIENDLY SYSTEMS
AUTOMATED CONTROL
MINIMAL MAINTENANCE REQUIREMENTS
COMPETITIVE OPERATIONAL COSTS
CHEMICAL TREATMENT EQUIPMENT
DESIGN / BUILD SYSTEMS
TOTAL SYSTEMS RESPONSIBILITY
FLOW RANGES FROM 20 GPM TO 10,000 GPM
REGENERATION TREATMENT SYSTEMS
NO-HASSLE SERVICE
THE PROCESS AND HOW IT WORKS
The Pureflow© selenium removal process includes a
unique, highly porous activated alumina media that is
physically and chemically stable. It has large surface
areas and high porosity that make it an excellent
adsorbent. The media is chemically inert to all but the
most corrosive gases and liquids, and resists
abrasion and disintegration.
Well water containing selenium is chemically
pretreated to adjust the pH. At the optimum pH for
selenium removal, some organic molecules and some
trace heavy metals, including arsenic, and fluoride are
also adsorbed on the media.
Automatic pH control
pretreatment. Selenium
the vast surface areas
activated alumina, and
achieved.
insures optimum chemical
ions are attracted and held to
throughout the pores of the
selenium removal is reliably
When the activated alumina bed has removed the
maximum amount of selenium, it requires regeneration
to remove the selenium from the media. The bed is
first backwashed to remove suspended solids, next the
bed is treated with caustic solution to dissolve the
selenium. The bed is then flushed with raw water to
remove excess caustic solution and neutralize the bed.
TYPICAL FILTER SIZES
*gpm
MODEL SURFACE
NUMBER
AREA
SQ. FT.
FILTER
FILTER
DIAMETER STRAIGHT
FILTER
PIPE
SHIPPING
OUTLETS
IN INCHES SIDE SHELL WEIGHT LBS. IN INCHES
10
F-16
2
20
60"
360
15
F-24
3
24
60"
450
25
F-40
5
30
60"
750
35
F-56
7
36
60"
1300
48
F-77
9.6
42
60"
1600
62
F-100
12.5
48
60"
1800
100 F-160
20
60
60"
2200
115 F-184
23
66
78"
3500
140 F-225
28
72
78"
4000
165 F-265
33
78
78"
4500
190 F-305
38
84
78"
5000
315 F-505
63
108
78"
6000
390 F-625
78
120
78"
7000
*Flows and side shell depth may vary with design conditions.
LOCAL REPRESENTATIVE
1 1/2
1 1/2
2
2
2
3
3
3
4
4
4
6
6
STANDARD FEATURES AND EQUIPMENT:
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OPTIONS AND SPECIAL DESIGNS:
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08/09
75 psi ASME code pressure vessel
Chemical pretreatment equipment
Process analyzers, recorder
Filter face piping
Electrically operated butterfly valves
Filter flow control valves
Backwash flow control valves
Filter and backwash flow meters
NSF approved interior coating
Regeneration chemical treatment equipment
Automatic control panel
Manways (and hatchway, when required)
Drain valves (up to 4")
Air relief valves
Custom written O & M manuals
Start-up instruction
High pressure ASME code vessels
Design / Build Systems
Pilot filters for field testing
Special designs available upon request.
PUREFLOW © FILTRATION Division California Environmental Controls, Inc. Whittier, CA 90601