T FLOC Water Treatment

rn Water pollutants viz., colloidal, suspended and dissolved cannot be removed by DAF/DGF or by settling. A physical-chemical pre-treatment such as Coagulation or Flocculation is required.

rn A varying combination of residence times and uncontrolled G-values is a major factor contributing to a disturbed Floc growth. Floc structure, shape and size will differ widely, impeding subsequent separation by DAF/DGF or settling. To compensate for these poor characteristics, the retention time in conventional type flocculators is three to five times longer than those indicated by the jar test.

rn T-FlocTM is a combination of pipe flocculators and plate flocculators, which are both based on the principle of the “tube-plug flow reactor”.

rn The pipe flocculator consists of a calculated length of pipe which is expanded in diameter along its length in order to facilitate the slower ortho-kinetic floc building up. The pipe is divided into certain lengths that are connected by 180° elbows. The result is a “coiled” pipe flocculator that can be suspended on a steel support frame. The flocculator pipe length and diameters can be exactly determined on the basis of jar test results.

rn Chemicals can be injected into the flocculator precisely at those points where they are most effective. The energy required for the flocculation process is not derived from stirring devices but by well-defined factors such as fluid velocity and pipe friction under plug flow conditions.

rn The plate flocculator consists of a number of vertical corrugated plates arranged in two or more compartments. The water flows between the plates from compartment to compartment in an alternately upward and downward direction. The first flocculator compartment is the smallest one with each successive compartment being larger, resulting in tapered velocity flocculation.