Biofilm process Biological, aerobic water treatment by the biofilm process: trickling filter Features - aerobic biofilm processes: trickling filter - practical experiments in laboratory scale - concentration profiles Learning objectives/experiments - functional principle of a trickling filter - recording of concentration profiles - creation of a stable operating state - identification of the following influencing factors -- flow rate of recirculation -- volumetric loading of the trickling filter -- surface loading of the trickling filter - comparison of various carrier materials Specification [1] aerobic biofilm process for the degradation of organic substances and for nitrification [2] transparent trickling filter with rotary distributor [3] speed of the rotary distributor finely adjustable [4] aeration of the trickling filter by natural convection or with compressor [5] recording of concentration profiles is possible [6] secondary clarifier with pump for transporting the return sludge [7] all relevant flow rates finely adjustable [8] separate supply unit with wastewater tank and two stirring machines [9] two different carrier materials made of HDPE Technical data Trickling filter - diameter: approx. 340mm - height: approx. 1000mm - capacity: approx. 90L Rotary distributor - max. speed: approx. 2min-1 Tanks - wastewater tank: 300L - collecting tank: 90L - secondary clarifier: 30L Flow rates - wastewater pump: max. 25L/h - circulation pumps: 2x max. 25L/h - return sludge pump: max. 25L/h - compressor: max. 600L/h Carrier material - specific surface: 180 or 300m2/m3 Measuring ranges - flow rate: -- 2...25L/h (wastewater) -- 5...65L/h (recirculation) -- 50...900L/h (aeration) 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1550x790x1150mm (supply unit) LxWxH: 2870x790x1900mm (trainer) Total weight: approx. 500kg