Kinetics of 4-nitrophenol biodegradation in a sequencing batch reactor

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• 作者：Tomei ; M. Concetta ; Annesini ; M. Cristina ; Luberti ; Roberta ; Cento ; Giorgia ; Senia ; Alessandro
• 关键词：4-Nitrophenol biodegradation ; Xenobiotics ; Sequencing batch reactor ; Kinetic parameters ; Haldane equation
• 刊名：Water Research
• 出版年：2003
• 出版时间：September, 2003
• 年：2003
• 卷：37
• 期：16
• 页码：3803-3814
• 全文大小：231 K

文摘

In this paper, the biodegradation process of 4-nitrophenol (4NP) in a sequencing batch reactor has been investigated. Kinetic tests have been carried out on biomass grown on mixed substrate (4NP plus biogenic substrate) both in the presence of a biogenic substrate fraction in the feed and with 4NP as the sole carbon source. Removal kinetics for all tests is well described by the typical substrate inhibition pattern as predicted by the Haldane equation. In both sets, estimated kinetic parameters are very similar: no beneficial effect of the biogenic fraction is observed on the 4NP removal while increasing trend of 4NP maximum removal rate with the 4NP/COD_TOT ratio in the feed has been observed. This finding has been modelled by estimating the fraction of the total biomass involved in 4NP biodegradation as a function of 4NP concentration in the feed.