• Praneet Enviroquips Pvtt Limited

DAF clarifier

Praneet Environquips designs and manufactures a range of equipments to treat polluted industrial effluents. The company"s expertise ranges from the basic stages of effluent analysis to setting up of complete clarification plants on turnkey basis. Dissolved air floatation (DAF) clarifier is basically a sedimentation clarifier. Operation: wastewater from equalisation/aeration tank is delivered by feed pump at low head to the over ground DAF-clarifier through rotating hydraulic joint and is released all along the radius through controllable apertures. The flow of water is in clockwise direction and the distribution pipe rotates in anticlockwise direction to create nearly zero relative velocity so as to achieve quiescent state in the main tub. Saturated dissolved air gets released in the form of microscopic bubbles, which attach to the fine suspended solids and colloids. Due to buoyancy effect, these SS particles are carried upwards at a fast rate of up to 300 mm/min forming a thick floating sludge blanket which keeps on thickening till picked up by rotating sludge skimmer into the floated sludge shell. The clarified water below sludge blanket is directed to rotating middle shell and it flows by gravity to adjustable weir, which presents the sludge-to-sludge skimmer at desired height. Sedimentable particles are swept into built in sludge tray, by a separator attached to the rotating middle shell. A fractional HP variable speed drive rotates both the shell and the sludge skimmer.