Evaporative Transpiration Trench

One of the options available for effluent disposal is to discharge the final effluent directly to a land application area.

The land application area forms an integral part of the treatment process. When designed correctly considering all.phpects including flow rates, effluent quality, and soil types the land application area will perform the function of dispersing and providing final treatment of the effluent for a significant time. All land application areas should be designed and installed under the guidelines as laid out in AS/NZS 1547.2000.

The effluent discharge kits provided with the units as standard are designed to work around soil type four as mentioned in the standard. Each site should be individually assessed as to the suitability or otherwise with regard to effluent disposal.

Application

There are some circumstances however where direct flow to ground type discharge will not be suitable. One alternative is to provide a sealed based trench alternative.

This arrangement captures the effluent from the unit and further treats it in a contained environment prior to releasing it via displacement. The top of the sealed based unit is installed above normal ground level reducing significantly the ingress of surface waters.

The crowning of the soil cover also reduces the ingress of heavy rainfall by allowing it to run off. Also planting's in the surface will allow uptake via transpiration and the sloped surface allows for maximum action by wind and heat for evaporation.

Any effluent that overflows the unit is released around the total perimeter of the sealed base unit as evenly as possible into the surrounding environment in a controlled manner. The actual release point is into the shallow subsurface level where most microbial activity occurs in.

Installation Instructions