Kinetic study of oxytetracycline and chlortetracycline inhibition in the anaerobic digestion of dairy manure
Kinetic study of oxytetracycline and chlortetracycline inhibition in the anaerobic digestion of dairy manure
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DOI：
10.1016/j.biortech.2020.123810
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发表时间：
2020-11-01
影响因子：
11.4
通讯作者：
Umetsu, Kazutaka
中科院分区：
文献类型：
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作者：
Andriamanohiarisoamanana, Fetra J.;Ihara, Ikko;Umetsu, Kazutaka
采用4种动力学模型对土霉素(OTC)和金霉素(CTC)抑制厌氧消化(AD)的机理进行了研究。结果表明，在土霉素浓度为0.04~1.28g/L范围内，土霉素的抑制作用快于土霉素，降解速率常数与土霉素呈线性正相关，分别由0.172~0.193 d(-1)、0.164~0.179 d(-1)和0.251~0.285 d(-1)增加到一级动力学模型、Fitzhugh模型和锥体模型，最大比产甲烷速率与四氯化碳呈线性负相关，由0.028降至0.016。锥体模型的拟合效果最好，其次是一级动力学模型、Fitzhugh模型和修正的Gompertz模型。甲烷产率的动力学模型有助于解释AD过程中OTC和CTC抑制的机理，并为进一步的工艺改进提供必要的信息。
This study was aimed to investigate the mechanisms of oxytetracycline (OTC) and chlortetracycline (CTC) inhibition in anaerobic digestion (AD) using four kinetic models. The results showed that the inhibition rate of OTC was faster than CTC at OTC and CTC between 0.04 and 1.28 g/L. Hydrolysis rate constant was linearly and positively correlated with OTC and increased from 0.172 to 0.193 d(-1), 0.164 to 0.179 d(-1) and 0.251 to 0.285 d(-1) using first-order kinetic, Fitzhugh and Cone models, respectively, while the maximum specific methane production rate was linearly and negatively correlated with CTC and decreased from 0.028 to 0.016 L/gVS. Cone model was found to give the most satisfactory fitting results followed in descending order by first-order kinetic, Fitzhugh and modified Gompertz models. The kinetic modeling of methane yield helped explain the mechanism of OTC and CTC inhibition in the AD process and provided essential information for further process improvement.