1Duty — what has to come out
Carbon is consumed by the mass it adsorbs. The more you ask it to remove, the more it
costs — so the influent and target concentrations are the whole economic question.
2Contact time & vessel geometry
Empty bed contact time is the design intent; the loading rate is what the geometry
then gives you. Choose the EBCT, choose the bed depth, and the vessel diameter follows — along with
the velocity, which is the number that actually has a limit.
3Carbon & backwash
Adsorption capacity is the number most often taken from a datasheet and applied to a
completely different water. Measure it on your own effluent if the tonnage matters.
Results — bed, carbon & run time
4Vessel & hydraulics
The geometry check. EBCT is what you asked for; the loading rate is what you got.
5Carbon consumption & bed life
This is the operating cost line. Bed life is what tells you whether the plant is
maintainable or whether you will be changing carbon every fortnight.
6Backwash & head loss
GAC beds collect biomass and solids. Clean-bed head loss is small; the fouled bed is
what the structure and the backwash system have to survive.
7Instrument schedule
The one measurement that matters is the one that tells you the bed is exhausted before
the effluent does. Differential pressure and effluent turbidity between them catch most of it.
Quote the adsorber instruments at factory price
Flow, differential pressure, level and effluent turbidity — all mappable to our catalogue and
supplied at the manufacturer's ex-works price (our margin is the export rebate, not a markup on the
device).
Request a quote for this duty
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