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Updated: May 1, 2026

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
Published on: December 6, 2018
Nitrogen balance and transformation in the nitrification process of coking wastewater and the influence on
Mingjun Shan1, Yan Zhang2, Lihong Kou2
1College of Water Sciences, Beijing Normal University, Beijing 100875, China E-mail: shanmj@126.com; Beijing Water Business Doctor Co., Ltd, Beijing 100875, China.
Abstract:
This paper describes the total nitrogen balance, and the direction and degree of nitrogen transformation during the nitrification process of coking wastewater. According to the actual nitrification process, the conventional nitrification kinetic equation was amended. After 48 h of nitrification, the total nitrogen content remained almost the same with error less than 0.6%. The total removal efficiency of NH4(+)-N was 91.1%, in which blow-off, producing cells and transforming to nitrate nitrogen accounted for 1.1, 17.8 and 72.2% respectively. Considering the influences of NH4(+)-N blow-off and conversion from cyanide, thiocyanide and organic nitrogen, the nitrification kinetic equation was amended as μ'=0.82·S/(0.48+S).
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