Recirculating Filtration System

The Recirculating Filtration System consists of three parts – Pumping Station, Media Filter, and Distribution Box. In the recirculating filtration system, the wastewater passes through the Media Filter.

In the Media Filter, layers of rocks and pebbles of different sizes filter the water.  Larger particles get caught in upper layers; smaller in lower layers. Bacteria that live in the air spaces between the rocks digest and decompose nutrients in the waste water. 

The filtered water then goes onto the Distribution Box which sends one-fifth of the it to the greenhouse for further treatment; four-fifths returns to the Pumping Station to be pumped to the Media Filter again. The number of times the water passes through the filter is called the recirculation ratio and is determined by the desired quality of treatment. This recirculation ratio is 4:1.

Follow the water: Source---> Septic Tanks --->Recirculating Filtration System---> Greenhouse (Subsurface Wetland, UV Light, Free Surface Wetland) ---> Discharge Site