Nano zero-valent iron modified membrane in an anaerobic biological system for enhanced chlorophenol-contained wastewater treatment
LU Yong-ze1, ZHU Ming-chao2, LI Na2
1. School of Energy and Environment, Southeast University, Nanjing 210096, China; 2. School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Abstract：Due to the lengthy acclimation period of anaerobic biotechnology and agglomeration of nano zero-valent iron (nZVI), a filter press method was applied to prepare the nZVI modified polyvinylidene fluoride (nZVI@PVDF) membrane for application in the anaerobic biological system dedicated to 2-chlorophenol-contained wastewater treatment. An investigation was conducted into the effect of dechlorination, hydrolysis and acidification, and methane production stages on the coupled system. According to the investigative results, the removal rates of 2-chlorophenol (2-CP) in the coupling system containing three membranes with different nZVI loadings (0.075, 0.15, 0.3g) reached 99%, 97.6%, and 91.8% within 48 hours, respectively. In contrast, the removal rates of the control group without nZVI@PVDF reached merely 62.7%. Besides, the COD removal rate in the coupled systems reached 88.2%, 89.1%, 89.4%, while that of the control group was 63.6%. Moreover, the proportion of headspace methane in the coupled system reached 25.16%, 25.98%, and 26.80%, while that of the control group was as low as 16.82%. It was also discovered that the nZVI@PVDF membrane promoted the production of fatty acids when methane inhibitors were introduced. The nZVI@PVDF membrane facilitated not only the dechlorination of chlorophenols but also the production of fatty acids and methane.
陆勇泽, 朱明超, 李娜. 纳米零价铁改性膜强化厌氧生物处理氯酚废水[J]. 中国环境科学, 2021, 41(12): 5664-5672.
LU Yong-ze, ZHU Ming-chao, LI Na. Nano zero-valent iron modified membrane in an anaerobic biological system for enhanced chlorophenol-contained wastewater treatment. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(12): 5664-5672.
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