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Enhancement of lipase activity for the oily wastewater treatment by an electrostimulation process

机译：通过静电过程提高脂肪酶活性的油性废水处理

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摘要

The efficacy of electrostimulation on bacterial lipase activity and COD removal was studied using a laboratory bioelectrochemical system. A stainless steel mesh was used as both anode and cathode. The results showed that the maximum lipase activity obtained was 38 Umol mL(-1) at an applied current of 1 mA and a COD concentration of 1100 mg L-1. COD removal efficiency decreased when the reaction time was shorter. Moreover, the lipase activity increased when current was increased to 10 mA. The optimum pH for the lipase activity was 7.0, and when the pH value was increased to 9.0, the lipase activity decreased. The kinetics for the COD removal were specified based on the data for the decomposition time, which was the reaction time required to attain a COD removal of more than 99% in the feed wastewater. Linear plotting showed that the experimental data fitted very well with that of the Michaelis-Menten model (R-2 = 0.9955). This shows that a suitable applied current could stimulate and improve the lipase activity. Therefore, this study provides useful information to correct the bioelectrochemical system designs and increase the removal efficiency of dissolved oils.
机译：使用实验室生物电化学系统研究了电刺激对细菌脂肪酶活性和鳕鱼去除的疗效。不锈钢网用作阳极和阴极。结果表明，在施加的电流为1mA的施加电流和1100mg L-1的COD浓度下，得到的最大脂肪酶活性为38μmml（-1）。当反应时间短时，COD去除效率降低。此外，当电流增加到10 mA时，脂肪酶活性增加。脂肪酶活性的最佳pH为7.0，当pH值增加至9.0时，脂肪酶活性降低。基于分解时间的数据指定了COD去除的动力学，这是在饲料废水中获得超过99％的COD去除鳕鱼所需的反应时间。线性绘图表明，实验数据非常适合于Michaelis-Menten模型（R-2 = 0.9955）。这表明合适的施加电流可以刺激和改善脂肪酶活性。因此，本研究提供了有用的信息，以纠正生物电化学系统设计并提高溶解油的去除效率。

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  • 来源
    《RSC Advances》 |2016年第116期|共8页
  • 作者

    Adibzadeh A.; Rezaee A.; Salehi Z.;

  • 作者单位

    Tarbiat Modares Univ Fac Med Sci Dept Environm Hlth Engn Tehran Iran;

    Tarbiat Modares Univ Fac Med Sci Dept Environm Hlth Engn Tehran Iran;

    Univ Tehran Coll Engn Sch Chem Engn Tehran Iran;

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  • 正文语种 eng
  • 中图分类 化学;
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