Various physicochemical ...

Various physicochemical techniques have been studied for their applicability in treatment of wastewaters . Like sedimentation, screening, aeration, filtration, flotation, degassification, chlorination, ozonation, neutralization, coagulation, sorption, ion exchange, etc. Several limitations of physicochemical methods including partial treatment, higher cost, generation of secondary pollutants, higher quantity solids and use of chemicals agents make the biological methods a favorable alternative for the removal of pollutants. Waste materials associated with the food industry including the wastes generated by the dairy industry namely sludge, heavy organic matter, fats, oil & grease, fatty acids, nitrogenous compounds are notables. Dairy wastewater deserves special attention since its levels of potential contaminants typically exceed those levels considered hazardous for domestic waste-water. May, what is the concentration of Sulphate? It will make me understand the situation at site, then I may be of some help.