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首页> 外文期刊>Journal of Zhejiang University Science: An international applied physics & engineering journal >Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment
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Kinetics of aerobically activated sludge on terylene artificial silk printing and dyeing wastewater treatment

机译：需氧活性污泥在涤纶人造丝印染废水处理中的动力学

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摘要

Aerobically activated sludge processing was carried out to treat terylene artificial silk printing and dyeing wastewater (TPD wastewater) in a lab-scale experiment, focusing on the kinetics of the COD removal. The kinetics parameters determined from experiment were applied to evaluate the biological treatability of wastewater. Experiments showed that COD removal could be divided into two stages, in which the ratio BOD/COD (B/C) was the key factor for stage division. At the rapid-removal stage with B/C>0.1, COD removal could be described by a zero order reaction. At the moderate-removal stage with B/C<0.1, COD removal could be described by a first order reaction. Then Monod equation was introduced to indicate COD removal. The reaction rate constant (K) and half saturation constant (K_s) were 0.0208-0.0642 L/(gMLSS) h and 0.44-0.59 (gCOD)/L respectively at 20℃-35℃. Activation energy (E_a) was 6.05x10~4 J/mol. By comparison of kinetic parameters, the biological treatability of TPD wastewater was superior to that of traditional textile wastewater. But COD removal from TPD-wastewater was much more difficult than that from domestic and industrial wastewater, such as papermaking, beer, phenol wastewater, etc. The expected effluent quality strongly related to un-biodegradable COD and kinetics rather than total COD. The results provide useful basis for further scaling up and efficient operation of TPD wastewater treatment.
机译：在实验室规模的实验中，进行了有氧活性污泥处理，以处理涤纶人造丝印染废水（TPD废水），重点是去除COD的动力学。实验确定的动力学参数用于评估废水的生物可处理性。实验表明，COD的去除可以分为两个阶段，其中BOD / COD（B / C）的比率是阶段分离的关键因素。在B / C> 0.1的快速去除阶段，COD去除可以通过零级反应来描述。在B / C <0.1的中度去除阶段，COD去除可以通过一级反应来描述。然后引入Monod方程表示COD的去除。在20℃-35℃下，反应速率常数（K）和半饱和常数（K_s）分别为0.0208-0.0642 L /（gMLSS）h和0.44-0.59（gCOD）/ L。活化能（E_a）为6.05×10 4 J / mol。通过动力学参数比较，TPD废水的生物处理性能优于传统的纺织废水。但是，从TPD废水中去除COD的难度要比从家庭和工业废水（如造纸，啤酒，苯酚废水等）中去除的难度大得多。预期的出水质量与不可生物降解的COD和动力学密切相关，而不是总的COD。研究结果为进一步扩大TPD废水处理规模和有效运行提供了有用的依据。

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