Partial Nitrification by controlling Environmental Conditions in a Swim-bed Reactor

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Duan, Xiumei^1 ; Li, Li^2 ; Deng, Shuping^1 ; Liu, Haiyan^1

YingKou Institute of Technology, Yingkou

115014, China^1

Puritek Environment Group Co. Ltd., Nanjing, JIANGSU

210048, China^2

关键词: Ammonia concentrations;    Ammonia conversion;    Constant temperature;    Dissolved oxygen concentrations;    Environmental conditions;    Nitrite accumulation;    Nitrite-oxidizing bacteria;    Partial nitrification;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/5/052030/pdf
DOI  :  10.1088/1755-1315/300/5/052030

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The effects of ammonia concentration, hydraulic detention time and dissolved oxygen on the ammonia conversion rate and nitrite accumulation efficiency were studied in the swim-bed biofilm reactor with the constant temperature and pH value. The temperature was controlled by heating rod at 35 ± 1 °C, the pH value was automatically regulated at 7.5 by adding 2 mol/L NaOH, influent ammonia concentration increased from 200 mg N/L, the dissolved oxygen concentration was below 2.5 mg/L, a stable nitrite accumulation were achieved in a swim-bed reactor and nitrite oxidizing bacteria was washed out.