The choice of the most effective prelimenary purification of urban wastewaters for their subsequent reverse osmotic treatment

On the basis of research of dispersion composition of pollutants in urban wastewater using laser diffraction methods of their preliminary preparation for further reverse osmotic purification were chosen. It has been found that filtration through a sand filter with the fraction 1.0–2.0 mm followed by microfiltration through ceramic tubular membranes of clay minerals ensures water treatment to standards for input water in reverse osmotic units.