2. Sewage Processing Plants – The particle size distribution and particle charge properties of solids in the final settling tanks International Environmental Technology Vol. 11 Issue 6 Nov/Dec 2001 Wolfgang Schubert, F. Wolfgang Gunthert, Renate Hessemann
…The theoretical sedimentation time of a 1-micron particle is around 210 days; for a 10-micron particle it is 50 hours; and for a 100-micron particle 30 minutes. Therefore in the final settling tanks, particles smaller than 100-micron that have sedimentation times of several hours may not settle-out completely…

3. Figures 1 and 2 show, as an example, the measured particle size distribution (from 6 to 3000-micron) in the final settling tanks of an activated sludge process and from a fixed bed plant respectively…
* Area Distribution representative of total particle size spectrum

4. “Selective Separation”

5. Baleen – the “missing link”
Micron Scale
Stage
Process
10,000
1000
100 10
1.0
0.1
0.01
0.001
Primary
Secondary
Tertiary
Coarse Screening
Fine Screening
Baleen Filtration
LEFT TO RIGHT SEEMS MORE LOGICAL TO ME......
Micro filtration
Ultra filtration
Nano Filtration
Reverse Osmosis

6. The Baleen filter…

7. Modular design…

8. Industry-Application ’05 ’10 ’20 ’40 ’80 ‘160
Baleen’s flow handling capability (kL/hr) within Municipal applications…
Baleen-Model
Industry-Application
’05
’10
’20
’40
’80
‘160
Raw sewage influent (post grit screens) 10 35
100
200
400
800
Secondary effluent (post clarification) 15 50
150
300
600
1200
Stormwater run-off (post GPT) 20 70
1600
The above tabulated performance figures refer to separation of visible, settle-able matter*
*Subject to site survey

9. Baleen (inline micro-screening) Vs Settling (clarifier retention)
Objective: Separation of visible constituents from storm water influent
Flowrate (kL/hr)
Baleen
Model
Volume
(<150-micron)
Clarifier
(<1hr-retention)
200
‘20
32 m3*
260 m3**
1600
‘160
135 m3*
2080 m3**
Outcome: Baleen offers “absolute” retention to a given micron-rating
* Includes minimum working clearance
**Includes minimum civil clearance (1.3x)