Premembrane treatment of drainage waters from dumps of solid domestic wastes

We examined the efficiency of pretreatment, prior to membrane purification, of drainage waters from domestic refuse dumps using oxidants, adsorbents, coagulants, and flocculants. We determined the optimum pH values for coagulatory processes and the optimum coagulant concentrations, and found that the most effective coagulant for these drainage waters was basic aluminum sulfate. Results of our experiments on a pilot facility incorporating units for coagulation and the reverse-osmosis desalting of the refuse dump drainage waters demonstrated the possibility of obtaining a permeate that met the requirements prescribed for discharge into the sewerage system.