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Nitrogen Removal Efficiency for Pharmaceutical Wastewater with a Single-Stage Anaerobic Ammonium Oxidation Process

Author

Listed:
  • Lushen Zuo

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Hong Yao

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Huayu Li

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Liru Fan

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

  • Fangxu Jia

    (School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China)

Abstract

A single-stage anaerobic ammonium oxidation (ANAMMOX) process with an integrated biofilm–activated sludge system was carried out in a laboratory-scale flow-through reactor (volume = 57.6 L) to treat pharmaceutical wastewater containing chlortetracycline. Partial nitrification was successfully achieved after 48 days of treatment with a nitrite accumulation of 70%. The activity of ammonia oxidizing bacteria (AOB) decreased when the chemical oxygen demand (COD) concentration of the influent was 3000 mg/L. When switching to the single-stage ANAMMOX operation, (T = 32–34 °C, DO = 0.4–0.8 mg/L, pH = 8.0–8.5), the total nitrogen (TN) removal loading rate and efficiency were 1.0 kg/m 3 /d and 75.2%, respectively, when the ammonium concentration of the influent was 287 ± 146 mg/L for 73 days. The findings of this study imply that single-stage ANAMMOX can achieve high nitrogen removal rates and effectively treat pharmaceutical wastewater with high concentrations of COD (1000 mg/L) and ammonium.

Suggested Citation

  • Lushen Zuo & Hong Yao & Huayu Li & Liru Fan & Fangxu Jia, 2020. "Nitrogen Removal Efficiency for Pharmaceutical Wastewater with a Single-Stage Anaerobic Ammonium Oxidation Process," IJERPH, MDPI, vol. 17(21), pages 1-9, October.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:21:p:7972-:d:437327
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