Resum
Use contaminated water to wash the teats of animals and tools, among others, is due to the presence of potential pathogens and pesticide residues, antibiotics and metalsin raw milk. Washing with water of excellent quality, premilkingis a key to reduce the contamination of milk and prevent these compounds are adsorbed on the skin of theudder and then migrate to milk gun. Aluminum sulfate, ferricchloride and chitosan for the removal of turbidity, colorand TOC in natural waters used in the daily activities of a dairy herd, plus the removal of metals such as copper, cobalt and zinc was assessed found was used frequently in natural waters in some regions of Colombia, in this case using the sweep coagulation to improve the removal efficiency. Ferric chloride was the most effective coagulant for conventional removal of turbidity, color and TOC removal percentages greater than 70% and a coagulant dose of 60 mg/L, while for the optimum metal removal doses were 235 mg/L and 500 mg/L aluminum sulfate, and 300 mg/Land 510 mg/L of ferric chloride, achieving removal percentages above 80 % for most metals. Chitosan did not showlarge removal efficiencies compared to other coagulants.
