The Hydro MicroScreen is an alternative to primary settling tanks for wastewater treatment that uses a rotating belt to physically separate solids and liquids. It can achieve equivalent or better removal of TSS, BOD, and FOG compared to primary tanks, while using half the cost, 90% less space, and 50% less power. The Hydro MicroScreen also produces sludge that is up to 50% drier than primary settling tanks. It has been successfully used to reduce treatment costs and space needs at wastewater plants.

1. Hydro MicroScreen™ vs Primary
Settling Tanks
Municipal Wastewater

2. Primary treatment
Primary settling tanks are
widely used to remove
wastewater TSS and BOD.
TSS:
Total Suspended
Solids
BOD:
Biological
Oxygen Demand

3. Primary treatment
Larger, more slowly
biodegradable solids
settle and are removed
as sludge.
Fine and dissolved solids
remain in suspension and
are contained in the
effluent.

4. Normally, primary settling tanks are
designed to provide 1.5–2.5 hours of
detention.
But performance is adversely affected
by short circuiting, hydraulic stability,
temperature and wind.
Primary treatment

5. Typical performance
Primary settling tanks typically
achieve:
Up to 70% TSS removal
Up to 40% BOD removal
Up to 12% total solids sludge

6. A different approach
But what if you could get
equivalent or better
performance in a smaller,
more efficient unit?

7. The Hydro MicroScreen™
The Hydro
MicroScreen™
is a rotating
belt screening
system.
It uses a physical
barrier to
separate liquids
and solids.

8. The Hydro MicroScreen™
This means that it removes TSS, BOD
and FOG faster, and in a smaller
footprint, than primary settling.

9. The Hydro MicroScreen™
It’s typically half the
cost, 90% smaller and
uses up to 50% less
power than conventional
primary treatment.

10. It removes more waste.
TSS
Up to
80%Up to
70%
BOD FOG
0%
Up to
40%
Up to
60%
Up to
40%
Versus primary settling
Primary settling
Hydro MicroScreen

11. It takes up less space.
Typically
90%
smaller
Versus primary settling
Primary settling
Hydro MicroScreen

12. It uses less power.
At least
10 hp
Up to
7 hp
Versus primary settling
Primary settling
Hydro MicroScreen

13. It produces drier sludge.
Up to
12%
total solids
Versus primary settling
Primary settling
Up to
50%
total solids
(with dewatering
components)
Hydro MicroScreen

14. Versus primary settling
Wastewater treatment plants are
already using it to cut costs and
improve efficiency.
In Fontana, CA one
MicroScreen and
modular filter eliminated
the need for:
Four primary clarifiers
Two secondary clarifiers
Two trickling filters
One grit channel

15. Summary
Compared with conventional
primary treatment, Hydro
MicroScreen™ can help you:
Reduce energy costs.
Cut solids handling.
Increase operating
efficiency.

16. Find out more
Visit the Hydro
MicroScreen™
product page
Read the case
study
Get the technical
brochure
Visit product page
Read case study
Get tech brochure