Abstract
Vinasse is a liquid effluent with high organic load and has significant concentrations of nitrogen (N-NO3-and NH4+-N) and potassium (K+). Nitrogen compounds from vinasse, like nitrate, can pollute soil and groundwater. The CETESB Report on Quality of Groundwater noted the growth in the concentration of nitrate in groundwater, including areas explored with sugar cane. Studies showed that t…