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AIM-OM-ATX-3, Rev. 2.1, 05/15
• Copyright Orenco Systems
®
, Inc. Property of Orenco Systems
®
, Inc. Do not reproduce or distribute without written authorization from Orenco: 800-348-9843.
AdvanTex
®
O
&
M
MANUAL
C O M M E R C I A L T R E A T M E N T S Y S T E M S
About the AdvanTex Treatment System
Primary Tank
The primary tank provides passive primary wastewater treatment. There
can be one or more primary tanks in parallel or series, depending on
the size of the system. In certain applications, the primary tank may be
preceded by a grease interceptor tank.
The primary tank is an enclosed, watertight receptacle designed to
collect wastewater; segregate settleable and floatable solids (sludge
and scum); accumulate, consolidate, and store solids; digest organic
matter; and discharge treated effluent. BOD (biochemical oxygen
demand) removals of greater than 65% and TSS (total suspended
solids) removals of greater than 70% are easily accomplished. In the
primary tank, wastewater separates into three distinct layers: a floating
scum layer, a bottom sludge layer, and a clear zone in between, which is
relatively free of large solids. An effluent filter or pump vault allows liquid
effluent from the clear zone to be transported to the recirculation/blend
or recirculation/blend and anoxic tank.
Anoxic Tank (if applicable)
The anoxic (low oxygen) tank enhances the denitrification of AdvanTex
®
filtrate. It is sized based on the design flow of the system. In systems that
use an anoxic tank, it is generally located between the primary tank, flow
splitter basin, and recirculation/blend tank in the treatment train.
The anoxic tank provides the ideal environment for carbonaceous
microbes that reduce nitrates to nitrogen gas (denitrification) from
AdvanTex filtrate returning from the flow splitter basin. The harmless
nitrogen gas is released freely back into the atmosphere.
Recirculation/Blend Tank
The recirculation/blend tank reduces the strength of the effluent being
applied to the AdvanTex filter. It is sized at 80 to 100% of the design flow.
It is located after the primary treatment tank and before the AdvanTex
textile filter.
The reduction in effluent strength is achieved by mixing treated filtrate
from the AdvanTex filter with primary treated effluent at the recirc valve,
located at the inlet of the recirculation/blend tank. A timer-controlled
pump at the outlet end of the tank then sends the blended effluent to the
AdvanTex filter.
AdvanTex
®
Textile Filter
The AdvanTex textile filter pod provides secondary wastewater treatment.
There can be one or more AdvanTex pods, depending on the size of the
system.
The filter is a sturdy, watertight fiberglass basin filled with an engineered
textile material. The textile media has a very large surface area and void
volume (for free flow of oxygen). Wastewater percolates both through
and between the textile media. A visible biological film normally develops
on the filter media within a few days of system start-up. Within the filter,
aerobic conditions exist that are ideal for microbes that convert ammonia
to nitrate (nitrification). BOD and TSS reductions occur almost immediately.
Nitrification may take four to six weeks, depending on ambient temperature.
After percolating through the filter media, the effluent gravity-flows to the
recirculating valve. On systems designed for enhanced nitrogen removal,
the effluent first flows to a flow splitter basin where a percentage of the
effluent is diverted to the inlet side of a primary tank or anoxic tank. The
remainder flows to the recirc valve, where it is directed either into the
recirculation/blend tank or discharged.
Scum
Clear
Sludge
