Method of measuring concentration of dissolved organic nitrogen in sewage

US11014835B2 · kind B2 · utility

Assignee

• Nanjing University · CN

Inventors

• Hongqiang Ren · Nanjing, CN
• Haidong Hu · Nanjing, CN
• Jinju GENG · Nanjing, CN
• Lili DING · Nanjing, CN
• Hui Huang · Longbeilingcun, CN

Key dates

• Filing date: Jun 15, 2020
• Grant date: May 25, 2021
• Expiry date: Jun 15, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2209/16
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A method of measuring concentration of dissolved organic nitrogen in sewage. The method includes: filtering a sewage sample using a filter membrane; measuring the concentrations of total dissolved nitrogen (TDN), ammonia nitrogen (NH4+), and nitric nitrogen (NO3−) in the sewage sample, respectively designated as CTDN(I), CNH4+(I) and CNO3−(I); calculating the ratios of (CNH4+(I)+CNO3−(I))/CTDN(I) and CNO3−(I)/CNH4+(I), and according to the ratios, calculating the concentration of dissolved organic nitrogen (DON) in the sewage sample.