Industrial water treatment plants

Key Attributes.

Industrial Water Treatment Plants Dissolved air floatation is a reliable separation process to remove solids from liquids. The most up-to-date clarifier based on this principle has been successfully used since 1973 for fibre recovery in paper mills and for a variety of solid / liquid separation processes. Worldwide installation of more than 3,500 supercells and installation of over 300 units in india alone, speak for the reliance placed by reputed industries and municipalities on the efficiency of KROFTA equipment. The concept of dissolved air floatation for removing solids from liquids was perfected by Mr. Milos Krofta of U. S. A. In the 70's and today, KROFTA TECHNOLOGIES CORP , U. S. A is one of the oldest and professionally established suppliers of water and wastewater treatment equipments in the world. Working Principle : Air is dissolved under pressure in the liquid, which is then released to atmospheric pressure in the floatation cell. As the microscopic air bubbles come out of solution, they attach to the suspended solids in the liquid, causing them to float to the surface forming a thick sludge. A special skimmer removes the sludge with the help of patented KROFTA spiral scoop and pours it into the stationary centre section from where it is discharged by gravity for either recycling or disposal. The unique compact and efficient design is made possible by use of the principle of "zero velocity". The KROFTA supercell is smaller in surface area for its capacity, because, a very high specific clarification degree is attained (160 to 200 ipm/sq mt. ). The water level in the tank is as low as 40 cms, which reduces the size and the weight of equipment, and, the retention time is just 3 minutes. Construction : Constructed from epoxy-coated mild steel, the KROFTA supercell is delivered in parts which can be flanged together. The KROFTA supercell does not required heavy foundation or support structure as the total load factor when filled with water would be less than 730 kg/sq. Metre. Operation : The central part of the supercell consists of two circular sections. The inner section contains the sludge well and is fixed while the outer section rotates along with the spiral scoop at a speed synchronized with the flow. The inlet, outlet and sludge removal mechanisms are all located in the central rotating section.