Treatment process for combined municipal and trade water effluent

摘要

Process to operate a two-stage treatment plant dealing with a combination of municipal and trade water effluent treats a combination of municipal and trade water effluent together with the introduction of raw water and the removal of activated sludge. The treatment plant has a biological high-load activation stage, followed by a biologically-intensified filter stage and an outlet for the treated waste water. The biologically-intensified filter stage is operated together with an upstream denitrification stage. A nitrification stage is positioned between the biologically-intensified filter stage and upstream denitrification stage. Also claimed is an assembly with an adsorption stage (1), an intermediate settlement stage (2), a solid-bed reactor (3) with upstream denitrification reactor (4) and nitrification reactor (5) linked in series. An outlet discharges from the settlement stage (2) to an activated sludge process (10) which discharges to an outlet, with part (11) of the discharge being returned to the denitrification reactor.