VERFAHREN ZUR ANAEROBEN WASSERBEHANDLUNG, INSBESONDERE ZUR MIKROBIELLEN NITRATELIMINIERUNG AUS TRINKWASSER

摘要

The basis of the invention is the problem of combining, by means of a suitable process for the anaerobic treatment of water, the advantages of the vertical tube reactors having a narrow residence time spectrum with low overall height of the apparatus and low costs. The individual part-steps of the denitrification are to proceed undisturbed individually and successively. According to the invention, the raw water (1) to be treated is passed via at least two fluidised bed reactors (3) connected one after the other and in the operating state is transported, with support material overgrown by biomass, from each reactor stage into the subsequent reactor stage. This support material is passed with the water stream leaving the last reactor into a separation unit (7) from which the separated support material is returned into the first reactor stage (3a). Depending on the pressure drop DELTA p in the individual reactor stages (3), the water to be treated can be passed via reactor stages (3a, 3b ...) staggered in height.