Question

Describe briefly the chemistry involved in waste water treatments. Explain primary, secondary and tertiary water treatments with the chemical reactions involved in the treatment process.

Answer 1

Waste water treatment and their process
=> 1) It is a process used Wastewater and co returned to the wate Wentz waste water g. Waeta 9Waste water treatments - sa process used to remove contaminants from ter and convert it into effluent that can be ed to the water cycle with minimum impact on The environment or directly reused. us process is also called water reclamation be created waste water can be used other purposes. 3)Treatment Process takes place in wote waste treatment plant.called sewage treatment plan * Primary waste water treatment & " It involves sedimentation of solid waste within water, This is done cefter filtering large contaminants within water, 2) waste water is passed through several tanks and filters separate water from contaminants. 3) Resulting Sludge is then fed into digester in which further processing takes place. 4) Primary batch of sludge contains nearly about 50% Suspended solids within waste water * Secondary waste water treatment? Is It makes use of oxidation to further Purify waste water. by three ways- . a) Biofiltration : This method employs Sand filters. trickling filters to remove additional sediment from waste water. Trickling filters are most effective for small-batch waste water treatment

chure is aerated varmer b) Aeration & It is long but effective process that entails miring waste water with a solution microorganisms. The resulting minciunais for up to 30 hours at a time to ensure resu c) Oxidation Ponds : It is typically used in war Places. In addition to this method utilizes natura bodies of water lie lagoons, waste water is pass through this body for period of time of then retaine for 2-3 weeks. * Tertiary waste water treatment - This is basic waste water treatment process. This 13 mostly removing nitrates and phosphates from the water supply 2) In this process activated carbon and sand are most commonally used materials to assist process.