...
Sludge
...
Blanket
...
Results
...
At
...
the
...
end
...
of
...
June
...
2008
...
an
...
inline
...
turbidity
...
meter
...
was
...
installed
...
to
...
compare
...
the
...
floc
...
formation
...
in
...
the
...
floc
...
blanket
...
tank
...
to
...
the
...
results
...
coming
...
for
...
the
...
tube
...
settlers
...
at
...
the
...
end
...
of
...
the
...
flocculator.
...
The
...
turbidity
...
meter
...
was
...
set
...
up
...
to
...
draw
...
samples
...
from
...
the
...
plant
...
leveling
...
tank
...
set-up
...
after
...
the
...
launder
...
out
...
of
...
the
...
sludge
...
blanket
...
tank.
...
After
...
this
...
set
...
up
...
was
...
completed
...
the
...
tank
...
was
...
run
...
at
...
up-flow
...
velocities
...
of
...
30,
...
50,
...
70,
...
and
...
100
...
m/day.
...
At
...
all
...
of
...
these
...
velocities
...
the
...
tube
...
settlers
...
out
...
of
...
the
...
flocculator
...
performed
...
better
...
than
...
sludge
...
blanket
...
removal
...
system.
...
Graphs
...
of
...
the
...
outlet
...
turbidity
...
versus
...
time
...
for
...
the
...
sludge
...
blanket
...
tank
...
and
...
the
...
final
...
tube
...
settler
...
in
...
the
...
flocculator
...
can
...
be
...
seen
...
below.
| Wiki Markup |
|---|
{float:right|border=2px solid black|width=200px} {anchor:30mperday}[!Pilot Plant - Flocculator Research^30mday_smallG.jpg|width=200px!|Pilot Plant - Flocculator Research^30mday_smallG.jpg] h5.Comparison of Results from the sludge blanket sedimentation tank at 30 m/day and a tube settler placed at the end of the flocculator. {float} |
At
...
30
...
m/day
...
there
...
was
...
very
...
little
...
suspension
...
of
...
the
...
floc
...
blanket,
...
it
...
was
...
mostly
...
settled
...
sludge.
...
All
...
floc
...
that
...
weren't
...
heavy
...
enough
...
to
...
settle
...
on
...
their
...
own
...
rose
...
through
...
the
...
tank
...
and
...
exited
...
the
...
tank
...
through
...
the
...
launder.
...
(To
...
examine
...
a
...
larger
...
picture
...
of
...
the
...
graph,
...
please
...
click
...
on
...
the
...
graph
...
to
...
the
...
right)
| Wiki Markup |
|---|
\\ \\ {float:right|border=2px solid black|width=200px} {anchor:50mperday}[!Pilot Plant - Flocculator Research^50mday_smallG_correct.jpg|width=200px!|Pilot Plant - Flocculator Research^50mday_smallG_correct.jpg] h5.Comparison of Results from the sludge blanket sedimentation tank at 50 m/day and a tube settler placed at the end of the flocculator. {float} |
At
...
50
...
m/day
...
the
...
tank
...
performed
...
decently.
...
A
...
good
...
floc
...
blanket
...
formed
...
in
...
the
...
tank
...
and
...
as
...
long
...
as
...
the
...
blanket
...
was
...
kept
...
a
...
few
...
inches
...
below
...
launder.
...
The
...
suspension
...
was
...
thick
...
and
...
fairly
...
stratified,
...
thicker
...
at
...
the
...
bottom
...
and
...
progressively
...
thinner
...
closer
...
to
...
the
...
top.
...
Still
...
some
...
fairly
...
decently
...
sized
...
floc
...
were
...
escaping
...
to
...
the
...
top.
...
It
...
was
...
suspected
...
that
...
this
...
flow
...
rate
...
was
...
too
...
low
...
and
...
that
...
the
...
shear
...
in
...
the
...
blanket
...
could
...
possibly
...
be
...
breaking
...
up
...
flocs.
...
This
...
was
...
a
...
suspicion
...
that
...
was
...
difficult
...
to
...
prove.
| Wiki Markup |
|---|
\\ \\ {float:right|border=2px solid black|width=200px} {anchor:70mperday}[!Pilot Plant - Flocculator Research^70mday_smallG.jpg|width=200px!|Pilot Plant - Flocculator Research^70mday_smallG.jpg] h5.Comparison of Results from the sludge blanket sedimentation tank at 70 m/day and a tube settler placed at the end of the flocculator. {float} |
At
...
70
...
m/day
...
the
...
sludge
...
blanket
...
was
...
thinner
...
than
...
at
...
50
...
m/day
...
but
...
still
...
well
...
developed
...
and
...
thick
...
at
...
the
...
bottom.
...
The
...
floc
...
rising
...
through
...
the
...
blanket
...
were
...
about
...
the
...
same
...
size
...
as
...
the
...
in
...
the
...
50
...
m/day
...
tank
...
and
...
the
...
results
...
were
...
in
...
consistent.
...
Sometimes
...
better
...
than
...
the
...
50
...
m/day
...
but
...
also
...
worse.
...
At
...
100
...
m/day
...
the
...
blanket
...
was
...
stratified
...
and
...
well
...
formed
...
but
...
much
...
thinner
...
toward
...
the
...
top
...
in
...
comparison
...
to
...
the
...
50
...
m/day
...
tank.
...
The
...
floc
...
that
...
were
...
rising
...
up
...
through
...
the
...
tank
...
were
...
much
...
smaller
...
than
...
at
...
the
...
other
...
velocities
...
suggesting
...
that
...
there
...
was
...
less
...
shear
...
in
...
the
...
blanket
...
at
...
this
...
higher
...
velocity
...
and
...
that
...
flocs
...
were
...
not
...
being
...
broken
...
up
...
and
...
rising
...
through
...
the
...
blanket.
...
The
...
100
...
m/day
...
velocity
...
needs
...
to
...
be
...
re
...
run
...
to
...
confirm
...
the
...
low
...
shear
...
theory
...
given
...
that
...
changes
...
were
...
made
...
to
...
the
...
flocculator
...
during
...
the
...
testing
...
of
...
various
...
velocities.
...
These
...
results
...
show
...
that
...
a
...
sludge
...
blanket
...
alone
...
is
...
not
...
as
...
effective
...
a
...
method
...
for
...
settlement
...
removal
...
as
...
the
...
lamella
...
simulated
...
by
...
the
...
tube
...
settlers.
...
Thus
...
now
...
it
...
is
...
being
...
explored
...
if
...
results
...
can
...
be
...
improved
...
by
...
combining
...
the
...
technologies
...
of
...
sludge
...
blankets
...
and
...
lamella.
...