Installation Manual:
AdvanTex
®
AX20-RT Treatment Units
NIM-ATX-AXRT-1
Rev. 1.0, 1/10
© 2010 Orenco Systems
®
Inc.
3
Concrete septic tank and AX20-RT (pump discharge model) shown
Overview
The AdvanTex
®
AX20-RT Treatment System has 10 main functional areas and components:
1. Septic Tank Inlet Tee
6. Textile Media
2. Biotube
®
Effluent Filter
7. Tank Baffle
3. Biotube Pump Package
8. Recirculating Treatment Tank (discharge side)
4. Recirculating Treatment Tank (recirc side)
9. Flow Inducer and Discharge Pump Assembly (pump discharge only)
5. Manifold and Laterals
10. Control Panel (not shown)
Raw sewage enters the septic tank through its inlet tee. In the septic tank, the raw sewage separates into three dis-
tinct zones: a scum layer, a sludge layer, and a clear layer. Effluent from the clear layer passes through a Biotube
®
effluent filter and is discharged by gravity to the recirculating treatment tank portion of the AX20-RT unit, which
contains a Biotube Pump Package. The Biotube Pump Package pumps filtered effluent from the recirc side of the
AX20-RT unit’s recirculating treatment tank to the distribution manifold in the top of the unit. Effluent percolates
down through the textile media and is distributed — by means of a tank baffle — between the recirculating side
and the discharge side of the AX20-RT recirculating treatment tank.
The operation of the pump on the recirc side of the tank baffle is controlled by a timer in the control panel, which
allows the pump to dose the textile media for short periods (usually a half-minute or less), typically 72 times a day.
This frequent “microdosing,” which optimizes the treatment process, occurs 24 hours a day, to maintain the proper
biological environment.
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3
4
5
6
7
8
9
Inlet
Septic Tank
AX20-RT Unit
Outlet
