Pollution Control - Primary Tank

The primary tank is used to remove solids from the effluent before it reaches the Eco-SAF stage. The Pollution Control range of primary tanks are designed and sized to achieve a good hydraulic retention time and ensure a sufficient settlement of the effluent., When the effluent enters the tank it is allowed to settle out due to the retention time, the heavier solids drop towards the base of the tank and the lighter solids float towards the top. Between these two layers is the liquid effluent which can be treated by the Eco-SAF module, the primary tank has a specially designed weir that only allows the liquid effluent to progress to the secondary stage of the process. The remaining solids and floating scum is removed from the tank periodically.