Physico-chemical treatment may constitute a single stage in the wastewater treatment process or be added as an additional treatment process during pre-treatment (to improve the biodegradation of wastewater in the biological process and secondary treatment (such as polishing).
Physicochemical treatment involves using chemicals which can modify the physical state of colloidal particles which helps in making them more stable and coagulable for further treatment or filtration purposes. These treatment methods have been used for over a century in conjunction with biological treatment methods
Physicochemical treatment consists of several steps in the treatment process.
(2) Screening and Straining
(3) Chemical Addition
(4) Coagulation and Flocculation
(5) Sedimentation and Clarification
(9) and finally Distribution.
The analytical data of various physicochemical parameters indicates that some parameters like pH, electrical conductivity, total dissolved solids, total suspended solids, turbidity and sodium are found to be in excess than the prescribed limit in some water samples of the study areas.