Sewage Treatment is the process that removes the majority of the contaminants from waste water or sewage and produces each a liquid effluent appropriate for disposal to the natural surroundings and sludge. It includes physical, chemical, and Biological processes to remove physical, chemical and biological contaminants. Its objective is to supply an environmentally safe fluid waste stream and a solid waste appropriate for disposal or reuse.
The general parameters for sewage water includes pH, Conductivity, Total Dissolved Solids, COD, BOD, Chlorides, Oil & Grease, Ammonical Nitrogen, Nitrates, Sulphates, Iron, Silica, Magnesium, Calcium, Acidity, Alkalinity, Phosphorus, Sodium, Potassium etc.
Effluent is the liquid waste flowing out from totally different areas of the plant. The treatment of various effluents varies with the kind of effluent. The industrial effluent treatment plants are designed to provide a pollution free working setting and recycle the water for other applications.
The ETP involves different stages of treatment including physic-chemical treatment and biological treatment followed by tertiary treatment. The general parameters for raw effluents and treated effluents includes pH, Conductivity, Total Dissolved Solids, COD, BOD, Chlorides, Sulphates, Oil & Grease, Ammonical Nitrogen and Viable Count.