Page 62 - Industrial Plants

open access and basically require just
periodic check or cleaning.
• Operators can handle routine tasks without
extensive training.
5. Low installation area requirements:
• Secondary sedimentation tanks can be kept
smaller because the particulate matter
discharged out of trickling filters is more
dense and easier to be settled.
• The structured fill media can withstand high
structural loads so the trickling filter can be
developed in height instead of width, further
reducing the required foot-print.
6. Cost-Effective Medium:
• The structured media made of robust plastic
is relatively inexpensive.
• Replacement costs are low compared to
more complex systems.

Recently, ENEXIO ITALY was awarded a contract
to supply the structured fillings for a series of
trickling filters used in the treatment of municipal
wastewater in a large urban area in Peru. Municipal
wastewater typically exhibits stable characteristics
with relatively low concentrations of biodegradable
organic substances and a good balance of
nutrients. This is a typical application where
trickling filters can be used not only for preliminary
organic load removal but, if adequate space is
available, also to achieve high purification yields
and potentially nitrification and, in more advanced
cases, even denitrification.
“Recently, ENEXIO ITALY was awarded
a contract to supply the structured
fillings for a series of trickling
filters used in the treatment
of municipal wastewater in a large
urban area in Peru

In this specific project, three identical trickling
filters were required, dedicated solely to organic
load removal, down below the local emission
limits.

System Components

Following pretreatment involving screening and air
flotation to remove larger suspended solids,
fibers, and FOG (Fat, Oil, Grease)—all components
that could affect the proper functioning of a
trickling filter—the wastewater is collected in a
common distribution well. Two dedicated booster
pumps feed each trickling filter. A trickling filter is
composed of a base support structure,
containment walls, top distribution system and

IndustrIal Plants - May 2024
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