Pilot Plant Tube Flocculator
Overview
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h1. Pilot Plant Tube Flocculator h3. Overview {float:right|border=2px solid black} !DSC02938.JPG|width=400! {float} |
The
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tube
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flocculator
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at
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the
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Pilot
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plant
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will
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be
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used
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to
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test
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the
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effects
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of
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raw
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water
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on
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floc
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formation
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and
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settling
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velocity.
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Similar
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experiments
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have
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been
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conducted
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in
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the
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laboratory.
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The
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tube
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flocculator
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is
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a
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long
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narrow
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tube
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coiled
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as
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in
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a
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figure
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eight
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formation.
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Alum
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is
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added
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as
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a
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coagulant
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in
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the
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flocculator.
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The
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positively
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charged
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alum
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particles
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promote
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floc
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formation.
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Flocs
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collide
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because
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of
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energy
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dissipation
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in
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the
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long
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narrow
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tubing.
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Large
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dense
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flocs
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settle
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out
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faster
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in
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sedimentation.
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Research
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has
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been
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done
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in
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the
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lab
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to
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determine
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optimal
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tube
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flocculator
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configuration
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to
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produce
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the
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largest
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settling
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velocities.
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The
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previous
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lab
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experiments
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have
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examined
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flocculation
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with
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mixtures
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of
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water
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and
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clay.
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The
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chemistry
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of
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raw
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water
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is
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much
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more
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complex
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than
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this.
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Results
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from
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the
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lab
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experiments
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may
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not
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accurately
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represent
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flocculation
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involving
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raw
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water.
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For
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example,
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raw
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water
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contains
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humic
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acids
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dissolved
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from
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soils.
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Humic
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acids
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are
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large
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negatively
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charged
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organic
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particles.
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They
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bind
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to
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positively
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charged
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alum
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particles
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and
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may
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absorb
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more
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alum
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than
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the
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lab
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flocculator.
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The
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goal
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of
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tube
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flocculator
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is
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to
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compare
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data
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from
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the
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Pilot
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Plant
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to
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lab
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experiments
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and
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confirm
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the
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adequacy
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of
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the
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lab
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data
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to
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model
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the
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behavior
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of
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raw
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water.
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