Center for Decentralized Wastewater Management

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Advanced Wastewater Treatment System O&M Workshop


Board Members

Training Center


Subsurface Drip Irrigation Design Guidelines from TVA

Tennessee Onsite Wastewater Association (TOWA)

Recent Activities

BsE 532 Onsite Domestic Wastewater Treatment, Dispersal, and Reuse

Drip Irrigation Research

Drip Research Presentations

Onsite Wastewater Regulations

Biosystems Engineering & Soil Science Department

The University of Tennessee
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Conventional Gravity Systems

The two conventional systems that are on display were designed for a wastewater loading rate that is typical for a three bedroom home.  Each system is partially elevated to allow trainees to view all the components of a properly installed system.  During training sessions potable water, which simulates wastewater, flows through each system. 

Serial Distribution    

Septic tank, field lines, & a soil trench box that represents the ground level.


Soil trench box showing the trench bottom, rock aggregate, perforated drain line, & soil cover.

Relief line connecting two field lines.

Tee connection between a relief line and field line.

Parallel Distribution

Concrete distribution box & PVC drain lines that feed the three trenches of the parallel system.

Drain line exiting the septic tank &
entering the distribution box.

Inside view of a distribution box.

Distal end of a field line.  Notice the end cap.

Tour the Displays

Conventional Gravity Systems

Low Pressure Pipe  (LPP)

Drip Dispersal

Grand Opening Pictures

NOWRA Field Trip