Detection method for sodium acetate in sewage

Abstract

The invention relates to a detection method for sodium acetate in sewage. The detection method comprises the following steps: 1) selecting instruments: an ion chromatograph; a chromatographic column AS19 4mm and a guard column AG19 4mm; a suppressor ASRS; an automatic sampler AS-DV; wherein the ion chromatograph includes a high-pressure infusion pump, an automatic generator of KOH leacheate and anelectrical conductivity detector; 2) selecting reagents: (1) fluorinion in concentration of 500mg / L, (2) chloridion in concentration of 500mg / L, (3) sulfate radical in concentration of 500mg / L, (4) sodium acetate and (5) sodium formate; 3) setting instrument parameters: the conveying flow rate of a high-pressure infusion pump: 1ml / min, KOH leacheate concentration of the automatic generator of KOHleacheate, suppressor current: 20mA, and sampling volume of an automatic sampler: 25muL; 4) drawing a working curve; and 5) determining a sample. The detection method for sodium acetate in sewage hassimple and convenient detection operation, high measuring precision and a great guiding significance in operations of a sewage treatment plant for adding and monitoring sodium acetate in sewage.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for determining sodium acetate in sewage. Background technique [0002] With the development of the economy and the emphasis on the ecological environment, China's discharge standards for sewage treatment are becoming more and more stringent, especially for pollutants such as nitrogen and phosphorus. Many cities in China have low-carbon, high-nitrogen and phosphorus water quality characteristics. Due to the low organic matter, the carbon-to-nitrogen ratio of the denitrification process in the anoxic stage cannot be satisfied when the conventional denitrification process is adopted, so the nitrogen removal effect is greatly reduced. Therefore, sewage treatment plants generally A carbon source is required. Sodium acetate is one of the carbon sources commonly used in sewage treatment plants at present. As a low-molecular organic acid, sodium acetate is easily utilized by mi...

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Problems solved by technology

Many cities in China have low-carbon, high-nitrogen and phosphorus water quality characteristics. Due to the low organic matter, the carbon-to-nitrogen ratio of the denitrification process in the anoxic stage cannot be satisfied when the conventional denitrification process is adopted, so the nitrogen removal effect is greatly reduced. Therefore, sewage treatment plants generally Need to add carbon source

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