Waste water treatment Research Paper Example | Topics and Well Written Essays - 1250 words

Waste water treatment - Research Paper ExampleThese techniques, however, are used to treat water. Water contains various colloidal solids such as plankton, decayed plant material, bacteria, ashes particles, as well as organic matter. These two processes help to remove these impurities. Coagulation neutralizes the particles and reduces the repelling force. Flocculation agglomerates destabilized atoms to rule large particles(Parson and Jefferson, 2006).In the chemical and level theory, flocculation and coagulation involves a three step process that consists of flocculation, shoot down mixing and coagulation(Akers 1972). For coagulation to take place, flash mixing has to occur. During flash mixing, coagulator chemicals are added to water. This mixture is thusly mixed violently and quickly distributing the chemicals inside the water. The coagulation-flocculation process destabilizes colloids, removes anions and metals, and removes pathogens as well as inorganic matter. after destabi lization, flocs are formed in which particles aggregate come by due to thermal movement of liquified molecules or induction of suspension mix and velocity gradients to be used in sedimentation.Filtration treatments as of the essence(p) pretreatments are supplemented by coagulation-flocculation processes. These processes accumulate suspended solids and particles into larger bodies to allow easy remotion through filtration processes. The removal of particulate matter by these methods tends to supplement the effectiveness of the filtering process. Gravity separation of these suspended solids may similarly require filtration. In the event of facilitating bonding among various particulates, chemical coagulants such as polymers or agitate salts are added to source water(Bratby 2006). The efficiency of this process depends on a number of variables and, therefore, any changes involved may affect other process. Changes may be in form of coagulant feed concentration, final PH, coagulant dosage, type of coagulant used,