METHODS MEASURING RATES OF NITRIFICATION AND DENITRIFICATION AND NO IN LIQUID Russian patent published in 2004 - IPC

FIELD: determination of quantitative composition of contaminants contained in sewage. SUBSTANCE: method measuring rate of nitrification includes separation of sample of liquid at time moment t₀, measurement of concentration of ammonia [[NH₃]₁] or ammonium [[NH+4

]₁,] present in specified sample at preset time t₁, separation of another sample of liquid and injection of air into this sample of liquid after lapse of another preset time t₂, termination of injection of air into this sample and adjustment of pH level at time moment t₃, recording of another value of ammonia [[NH₃]₂] or ammonium [[NH+4]₂,] in another sample at preset time t₄ and determination of rate of nitrification of liquid in compliance with formula or , where NR is rate of nitrification, Δt is t₃-t₂, Δ[NH₃] is and Δ[NH+4] is Invention provides for another variant of implementation of method measuring rates of denitrification in liquid. EFFECT: capability of determination of quantitative composition of various contaminants such as nitrogen oxides contained in sewage, which ensures possibility for sewage to be treated in the best way as sewage purified improperly bears threat to man's health. 28 cl, 10 dwg