Theme: Determination and calculation the efficiency of aerotanks

Theme:Determination and calculation the efficiency of aerotanks
An aeration tank is an autonomous sewage system where biological treatment of wastewater occurs with activated sludge under the influence of oxygen. The system is designed for processing and environmentally safe disposal of wastewater from domestic sewage into the soil
A reliable procedure used to calculate the oxygen required is given step wise as:
ETP Capacity in m3/day.
Inlet BOD in mg/l.
Desired Outlet BOD in mg/l.
Total BOD to be removed (Influent) capacity in kg/Day.
O2 to be transferred in kg/Day.
Method of Aeration = Fine Bubble Diffuser
Concentration (dose) of activated sludge• Amount of activated sludge per unit volume of sludge mixture, g/l. In aeration tanks of different systems and designs dose range the sludge is quite large - from 1 to 20 g/l. According to the laboratory analysis data provided on operating aeration tanks maintain a dose of activated sludge from1.55 g/l (in an aeration tank with dispersed water inlet) to 1.95 g/l(in the aeration tank-displacer), the average concentration is1.75 g/l. The higher the value of the working dose of sludge in the aeration structure,the higher the oxidative power of this structure.