*** This version of Confluence is for testing only and contains a copy of content from June 29th 2026. No changes will be preserved. ***
...
Pipe
...
Diameter
...
The
...
effluent
...
launder
...
will
...
span
...
the
...
length
...
of
...
the
...
tank
...
about
...
10.16cm
...
(4")
...
off
...
of
...
the
...
center
...
of
...
the
...
tank.
...
The
...
launder
...
is
...
placed
...
5.08cm
...
(2")
...
beneath
...
the
...
water
...
level.
...
This
...
value
...
was
...
chosen
...
so
...
that
...
enough
...
water
...
head
...
would
...
be
...
available
...
to
...
allow
...
for
...
relativley
...
equal
...
flow
...
through
...
the
...
lauder
...
orifices
...
and
...
so
...
that
...
a
...
majority
...
of
...
the
...
tank
...
height
...
would
...
be
...
available
...
for
...
the
...
floc
...
blanket.
...
The
...
diameter
...
of
...
the
...
effluent
...
launder
...
was
...
calculated
...
by
...
iterating
...
through
...
pipe
...
diameters
...
to
...
find
...
the
...
existing
...
diameter
...
of
...
pipe
...
that
...
gave
...
the
...
desired
...
flow
...
rate
...
and
...
orifice
...
holes.
...
The
...
diameter
...
was
...
selected
...
based
...
on
...
the
...
following
...
equation:
...
| Include Page | ||||
|---|---|---|---|---|
|
...
|
...
- Qratio
...
- is
...
- assumed
...
- to
...
- be
...
- 0.92,
...
- this
...
- indicates
...
- that
...
- flow
...
- through
...
- the
...
- first
...
- orifice
...
- will
...
- be
...
- 92%
...
- of
...
- the
...
- flow
...
- through
...
- the
...
- last
...
- orifice.
...
The
...
- best
...
- pipe
...
- diameter
...
- is
...
- 3.81cm
...
- (1.5")
...
- inches.
...
- The
...
- number
...
- of
...
- orifice
...
- holes
...
- was
...
- tweaked
...
- until
...
- the
...
- orifice
...
- hole
...
- diameter
...
- would
...
- match
...
- up
...
- with
...
- a
...
- drill
...
- bit
...
- size
...
- and
...
- still
...
- gave
...
- the
...
- proper
...
- amount
...
- of
...
- head.
...
- (equations
...
- for
...
- this
...
- can
...
- be
...
- seen
...
- in
...
- the
...
- following
...
- section)
...
- This
...
- head
...
- loss
...
- was
...
- defined
...
- to
...
- be
...
- about
...
- 5
...
- cm,
...
- or
...
- the
...
- head
...
- available
...
- above
...
- the
...
- launder.
...
- If
...
- the
...
- head
...
- loss
...
- through
...
- the
...
- launder
...
- orifices
...
- exceeded
...
- the
...
- available
...
- head,
...
- we
...
- would
...
- have
...
- encountered
...
- issues
...
- because
...
- the
...
- water
...
- in
...
- the
...
- outlet
...
- system
...
- would
...
- have
...
- had
...
- less
...
- energy
...
- than
...
- the
...
- surrounding
...
- system,
...
- which
...
- would
...
- have
...
- effected
...
- the
...
- flow
...
- rate
...
- and
...
- caused
...
- air
...
- to
...
- collect
...
- in
...
- the
...
- outlet
...
- pipe.
...
- The
...
- total
...
- number
...
- of
...
- orifices
...
- was
...
- determined
...
- to
...
- be
...
- 15.
...