Retrofit Your Existing DAF with a SAF™ Generator
 MODEL F200 replacing a DAF pressurization system
- SAF™ replaces the existing DAF pressurization / recirculation system.
- SAF™ will increase existing DAF capacity significantly, without the cost and logistical obstacles of a new installation.
- SAF™ will use significantly less power than the replaced DAF Recirculation system.
- SAF™ will remove more solids than the replaced DAF was capable of.
- SAF™ retrofit will be more flexible to operate than the replaced DAF.
- SAF™ is more cost-effective to operate than the replaced DAF.
Here’s How
- Establish a froth injection point at a location on the DAF influent line that provides adequate mixing…i.e. prior to a 90 degree elbow or within a serpentine contact chamber.
- Locate a place to stage the SAF™ Generator. Yes, it can be remotely located; but the closer the better.
- Provide potable water and electricity or compressed air as required.
- Allow space to place a container of surfactant, and provide 110v power for an LMI Pulsed Diaphragm Metering Pump (or equivalent).
- Turn off the existing DAF Recirculation / Pressurization System.
Operation
- A signal will need to be provided to start the generator. This signal can be manual or a high level switch from an equalization tank.
- The SAF™ Generator will warm up for a period of 45 – 60 seconds prior to releasing froth to the process. During this period, wastewater should not be allowed to enter the flotation tank.
- The SAF™ Generator Control Panel can provide a signal to start wastewater flow when the warm-up phase is complete and the SAF™ Generator begins feeding froth to the flotation system.
- The same signal that starts wastewater flow can be used to start polymer feed, water, chain and flight skimmers, and downstream dewatering system and/or pumps.
- The flotation system can be turned off either manually or automatically by a low level switch located in the equalization tank.
Operational Costs
- Surfactant normally costs <$0.03 per thousand gallons of wastewater treated.
- Power to run the SAF™ generator depends on suspended solids content in the wastewater; typically less than $0.10 per thousand gallons treated.
- Normally these costs are less than the cost of power consumed by the existing DAF recirculation / pressurization system
Options
- Serpentine Contact Chamber can be provided, allowing 30 seconds contact time and mixing for polymer and froth addition.
- Dewatering Conveyor can be provided to condition floated solids to the point were there is no free-draining liquid.
SAF™ Generator Sizing
| Wastewater Suspended Solids (mg/L) |
| |
500 |
1000 |
1500 |
2000 |
2500 |
3000 |
3500 |
4000 |
4500 |
5000 |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
M
a
x
i
m
u
m |
N
o
m
i
n
a
l |
| Model |
Suspended Air™ Emulsion Generator Wastewater Flow Rating (gpm) |
| F2 |
50 |
50 |
25 |
25 |
16.7 |
15 |
12.5 |
12 |
10 |
10 |
8.3 |
8 |
7 |
7 |
6 |
6 |
5.6 |
5 |
5 |
4 |
| F8 |
200 |
200 |
100 |
100 |
66 |
60 |
50 |
50 |
40 |
40 |
33 |
30 |
29 |
28 |
25 |
25 |
22 |
20 |
20 |
15 |
| F25 |
634 |
600 |
317 |
300 |
209 |
200 |
159 |
150 |
127 |
120 |
105 |
100 |
91 |
90 |
80 |
75 |
70 |
60 |
63.4 |
45 |
| F50 |
1268 |
1250 |
634 |
600 |
418 |
400 |
317 |
300 |
254 |
250 |
209 |
200 |
181 |
175 |
159 |
150 |
141 |
125 |
127 |
100 |
| F100 |
2536 |
2500 |
1268 |
1200 |
837 |
800 |
634 |
600 |
507 |
500 |
418 |
400 |
362 |
350 |
317 |
300 |
282 |
250 |
254 |
200 |
| F200 |
5072 |
5000 |
2536 |
2400 |
1674 |
1600 |
1268 |
1200 |
1015 |
1000 |
837 |
800 |
725 |
700 |
634 |
600 |
564 |
500 |
507 |
400 |
 Retrofit DAF Brochure (.pdf 80 kb)
DON’T BE FOOLED BY IMITATORS – Insist on SAF™ by Heron Innovators!
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