Method for calculating carbon source dosage on line based on inflow carbon-nitrogen ratio

Abstract

The invention discloses a method for calculating a carbon source dosage on line based on an inflow carbon-nitrogen ratio. The method comprises the following steps: calculating an inflow carbon-nitrogen ratio according to the inflow COD concentration and the total nitrogen concentration; and judging whether the carbon source in the inflow water is sufficient, insufficient or excessive according tothe inflow water carbon-nitrogen ratio; calculating a carbon source dosage correction amount for different carbon source levels by adopting different formulas; and then calculating the carbon source dosage required at the current moment according to the carbon source dosage correction amount. The carbon source dosage calculated by using the method can respond to the fluctuation of the carbon-nitrogen ratio of inflow water, and a proper carbon source dosage is given, so that a problem that the water quality does not reach the standard due to insufficient carbon source dosages, or medicament waste and secondary pollution are caused due to excessive carbon source dosages are avoided.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a method for online calculation of carbon source dosage based on the carbon-nitrogen ratio of influent. Background technique [0002] At present, most sewage treatment plants will use an external carbon source (usually sodium acetate, methanol and other organic matter) to ensure the normal operation of the denitrification process, so as to ensure that the total nitrogen in the effluent meets the discharge requirements. [0003] Insufficient carbon source addition will lead to insufficient denitrification, affecting the discharge of total nitrogen in the effluent; while excessive carbon source addition will cause waste of chemicals and increase operating costs on the one hand, and on the other hand will lead to an increase in organic matter in the sewage, and COD in the effluent exceeds the standard The risk of COD increases, which increases the burden of COD treatment,...

AI Technical Summary

Problems solved by technology

The traditional carbon source dosing technology lacks detailed measurement and prediction of carbon source dosing. Generally, it adjusts the carbon source dosing amount according to the set ratio according to the change of influent carbon-nitrogen ratio, and does not fully consider To the extent of the change of carbon-nitrogen ratio, the influence of sufficient carbon source on the amount of carbon source, so there is a lack of calculation accuracy, which may easily lead to the problem of insufficient or excessive carbon source

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