...
Linear
...
Chemical
...
Dose
...
Controller
Abstract
The original Chemical Dose Controller (CDC)
...
is
...
designed
...
to
...
have
...
a
...
linear
...
relationship
...
between
...
the
...
flow
...
of
...
alum
...
and
...
the
...
height
...
of
...
water
...
in
...
the
...
entrance
...
tank.
...
The
...
CDC
...
itself
...
is
...
a
...
combination
...
of
...
three
...
previous
...
subteams:
...
the
...
...
...
...
...
;
...
the
...
...
...
...
;
...
and
...
the
...
...
...
.
...
These
...
three
...
devices
...
work
...
together
...
to
...
automatically
...
change
...
the
...
amount
...
of
...
alum
...
that
...
enters
...
rapid
...
mix
...
as
...
the
...
flow
...
through
...
the
...
plant
...
is
...
increased.
...
A
...
description
...
of
...
these
...
devices,
...
and
...
how
...
they
...
work
...
can
...
be
...
found
...
below.
...
Since
...
the
...
linear
...
CDC
...
is
...
currently
...
in
...
use
...
in
...
Honduras,
...
the
...
current
...
goal
...
for
...
this
...
project
...
is
...
to
...
make
...
the
...
design
...
more
...
robust.
...
Current Research
| Wiki Markup |
|---|
Research {float:right|border=2px solid black|width=250px} [!Laboratory Research Set-ups^ACDF08 Labeled Context View.jpg|width=250px!|Laboratory Research Set-ups] {float} |
The
...
vertical
...
chemical
...
dosing
...
tube
...
portion
...
of
...
the
...
CDC
...
was
...
tested
...
with
...
various
...
tubing
...
diameters
...
to
...
determine
...
the
...
failure
...
point.
...
If
...
free
...
fall
...
or
...
open
...
channel
...
flow
...
was
...
observed
...
within
...
the
...
vertical
...
drop
...
tubing,
...
then
...
the
...
dosing
...
would
...
be
...
accurate.
...
We
...
determined
...
that
...
the
...
smallest
...
allowable
...
inner
...
tubing
...
diameter
...
is
...
one
...
quarter
...
inch.
...
Currently,
...
a
...
preliminary
...
manuscript
...
based
...
on
...
the
...
development
...
and
...
research
...
of
...
the
...
Linear
...
Chemical
...
Dose
...
Controller
...
is
...
being
...
written
...
for
...
publication
...
as
...
a
...
journal
...
article.
...
All
...
drafts
...
of
...
the
...
scientific
...
research
...
paper
...
are
...
attached
...
to
...
this
...
page
...
for
...
viewing
...
and
...
editing
...
by
...
all
...
AguaClara
...
team
...
members.
...
Considerable
...
editing
...
and
...
revising
...
is
...
required
...
for
...
the
...
paper.
...
The
...
research
...
that
...
has
...
been
...
conducted
...
in
...
previous
...
semesters
...
will
...
need
...
to
...
reconciled
...
and
...
verified.
...
In
...
addition,
...
much
...
of
...
the
...
data
...
may
...
not
...
be
...
publishable.
...
Many
...
experiments
...
will
...
need
...
to
...
be
...
redone
...
or
...
performed
...
for
...
the
...
purpose
...
of
...
the
...
paper.
...
Relevant
...
Data
...
Files
...
...
...
...
...
...
...
Previous Research
Linear Flow Orifice Meter (LFOM)
The Linear Flow Orifice Meter riser pipe, LFOM, is located in the entrance tank. It is used in the plant when chemical dose flows are laminar. The LFOM tank creates a linear relationship between the flow rate through the plant and the height of water in the entrance tank so that a float system can be used control the chemical dose.
Linear Chemical Doser
The Linear Chemical Doser creates a directly proportional relationship between the plant inflow tank water level and the flow controller outflow tubing level.
Flow Controller
The Flow Controller maintains a constant head level in a small bottle so that hydraulics can be used to dose a specific chemical flow rate solely by controlling the outflow tubing level.