Pollution Control (UK) Ltd products

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.

Clarifier tanks are used to remove fine particles from effluent; they are usually square in shape with angled outer walls. They work by gravity combined with the angle of the walls of the tank. The effluent enters the tank; any particles in the effluent come into contact with the angled wall and slide down to the base of the tank which builds up as sludge. The effluent then flows over a weir and out of the tank to discharge. Sludge which builds up can be removed periodically or used as activated sludge in the Eco-SAF stage of the process.