Liu Miaomiao, Yao Hong, Liu Hao, Xu Jing, Zuo Lushen
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China E-mail:
Water Sci Technol. 2014;70(6):947-54. doi: 10.2166/wst.2014.308.
Conventional and single-stage anaerobic ammonium oxidation (ANAMMOX) was carried out in bench-scale reactors to treat chlortetracycline (CTC) wastewater. The total nitrogen (TN) removal efficiency and rate for conventional ANAMMOX was 66.6 ± 5.9% and 2.7 ± 0.2 kg N/(m³·d), respectively, which was 58.6 ± 3.8% and 1.2 ± 0.1 kg N/(m³·d) for single-stage ANAMMOX. Single-stage ANAMMOX showed higher tolerance to CTC than conventional ANAMMOX. The nitrogen removal of conventional and single-stage ANAMMOX began to deteriorate when CTC was added, to 40 and 80 mg/L, respectively, with the former totally inhibited at 120 mg/L CTC and the latter at 140 mg/L CTC. TN removal rates were recovered to 1.2 and 0.7 kg N/(m³·d), respectively, when CTC concentration was reduced to 20 mg/L for 8 days. This study implied that ANAMMOX could be efficiently used to treat pharmaceutical wastewater, with single-stage implementation being more stable under antibiotic pressure.
在实验室规模的反应器中进行了传统和单级厌氧氨氧化（ANAMMOX）处理四环素（CTC）废水的实验。传统厌氧氨氧化的总氮（TN）去除效率和速率分别为66.6±5.9%和2.7±0.2 kg N/(m³·d)，单级厌氧氨氧化的分别为58.6±3.8%和1.2±0.1 kg N/(m³·d)。单级厌氧氨氧化对CTC的耐受性高于传统厌氧氨氧化。当添加CTC时，传统和单级厌氧氨氧化的脱氮效果开始恶化，分别在CTC浓度为40和80 mg/L时，前者在120 mg/L CTC时完全抑制，后者在140 mg/L CTC时完全抑制。当CTC浓度在8天内降至20 mg/L时，TN去除率分别恢复到1.2和0.7 kg N/(m³·d)。该研究表明，厌氧氨氧化可有效用于处理制药废水，单级工艺在抗生素压力下更稳定。
