VERFAHREN ZUR MIKROBIOLOGISCHEN AEROBEN ABWASSERBEHANDLUNG

摘要

The micro-biological aerobic waste water treatment comprises distributing the waste water in a pressure-free reaction area and a pouring, collecting the waste water in a receiver (6) after the passing through substrate, subjecting a substrate pouring to artificially produced air flow, a regeneration of the substrate pouring taking place at defined time intervals and interrupting strong air flow and water circulation. The pouring is not immersed in water and is composed of a fine-grained growth substrate (2) for microorganisms with a density of less than 0.1 g/cm 3>. The micro-biological aerobic waste water treatment comprises distributing the waste water in a pressure-free reaction area and a pouring, collecting the waste water in a receiver (6) after the passing through substrate, subjecting a substrate pouring to artificially produced air flow, a regeneration of the substrate pouring taking place at defined time intervals and interrupting strong air flow and water circulation. The pouring is not immersed in water and is composed of a fine-grained growth substrate (2) for microorganisms with a density of less than 0.1 g/cm 3> and a grain size less than 15 mm is sprinkled downwards from above. The air flow during the continuous wastewater treatment lies between 20-100 m 3>/m 2>xh. The wastewater is again partly led back into the cycle downwards from the top of the substrate pouring. The substrate pouring is subjected to an artificially produced, upwardly flowing, strong air flow between 150-1000 m 3>/m 2>xh and a pressure between 20-200 millibar per meter height of the substrate pouring in opposite direction of the flow cycle of the trickling waste water. The substrate pouring is fluidized, until a part of the biomass adhering between the individual carrier particles and the fine solids filtered off from the wastewater are abraded. The regeneration filtrate composed of wastewater and abraded biomass subsequently flowing out off the substrate pouring is collected and removed from the system. The speed of the downwardly trickling waste water resulting from the continuous waste water supply and the additional cycle flow lies in the range between 3-15 m 3>/m 2>xh. The substrate pouring consists of spherical polystyrene foam. In the discharge of the regeneration filtrate, the receiver is again filled up with the wastewater. The regeneration is initiated by the rise of the pressure below the substrate pouring. The input of untreated wastewater into the reaction area and the discharge of treated wastewater from the reaction area are switched off during the regeneration. The strong air flow during the regeneration is supplied in a sequence of brief impulses. The substrate pouring swims on the surface of the water body.