Dai Qi, Liu Rui, Shu Xiao-Ming, Zhang Yong-Ming, Chen Lü-Jun
College of Life and Environment Science, Shanghai Normal University, Shanghai 200234, China.
Zhejiang Provincial Key Laboratory of Water Science and Technology, Department of Ecological Environment, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China.
Huan Jing Ke Xue. 2018 Jan 8;39(1):212-218. doi: 10.13227/j.hjkx.201704059.
A membrane bioreactor (MBR) was used to treat ciprofloxacin (CIP)-contaminated artificial wastewater. The pollutant removal performance and the microbial community structure of the MBR were studied at three different CIP dosages (0 mg·L, 5 mg·L, and 10 mg·L). The results showed that the sludge concentration in the reactor decreased and then levelled off as the dosage of CIP was increased from 0 mg·L to 5 mg·L and further to 10 mg·L. The mean removal of TOC and COD decreased from 98.40% and 97.80% to 84.20% and 94.10%, respectively, indicating that the CIP negatively influenced the organic removal but the effect was minor. In contrast, the ammonium removal was greatly influenced by the dosage of CIP. When the CIP dosage increased from 0 mg·L to 5 mg·L and further to 10 mg·L, the ammonium removal efficiency decreased from 96.91% to 84.14% and then to 77.80%, and the activity of , , , and were greatly inhibited. The CIP removal initially increased and then decreased. The mass balance revealed that the removal of CIP in the MBR was principally attributed to biodegradation and sludge adsorption, which accounted for 30.13% and 0.25%, respectively, at a CIP dosage of 5 mg·L and 7.55% and 1.81% at a CIP dosage of 10 mg·L.
采用膜生物反应器（MBR）处理受环丙沙星（CIP）污染的人工废水。研究了在三种不同CIP剂量（0 mg·L、5 mg·L和10 mg·L）下MBR的污染物去除性能和微生物群落结构。结果表明，随着CIP剂量从0 mg·L增加到5 mg·L再增加到10 mg·L，反应器中的污泥浓度先下降然后趋于稳定。TOC和COD的平均去除率分别从98.40%和97.80%降至84.20%和94.10%，表明CIP对有机物去除有负面影响，但影响较小。相比之下，铵的去除受CIP剂量的影响很大。当CIP剂量从0 mg·L增加到5 mg·L再增加到10 mg·L时，铵去除效率从96.91%降至84.14%，然后降至77.80%，且 、 、 和 的活性受到极大抑制。CIP的去除率先升高后降低。质量平衡表明，MBR中CIP的去除主要归因于生物降解和污泥吸附，在CIP剂量为5 mg·L时，生物降解和污泥吸附分别占30.13%和0.25%，在CIP剂量为10 mg·L时，分别占7.55%和1.81%。
