School of Chemical Engineering and Technology, Tianjin University, Tianjin, People's Republic of China.
Bioresour Technol. 2010 Nov;101(22):8535-40. doi: 10.1016/j.biortech.2010.05.094. Epub 2010 Jul 8.
In this study, effect of magnetic field on the activity of activated sludge in wastewater treatment was investigated. During the experiment, biodegradation duration, magnetic density, operating temperature and medium pH value were changed within the ranges from 0 to 60h, 0 to 500.0mT, 10.0 to 50.0 degrees C and 3.0 to 12.0, respectively. These results revealed that activated sludge acclimatization and organic pollutant biodegradation processes under magnetic field were stimulated, resulting in a higher efficiency of wastewater treatment. Biodegradation of organic compounds under magnetic field could reach stable states after 48h. The organic compounds removal rate first roared up and then fell down with the increase of magnetic density of the field, turning at 20.0mT. On account of application of magnetic field, the range of temperature and pH, which is suitable for the growth of microbe, were 20.0-40.0 degrees C and 6.0-10.0, respectively, which were expanded compared with those without the magnetic field.
本研究考察了磁场对废水处理中活性污泥活性的影响。实验过程中，生物降解时间、磁场密度、操作温度和介质 pH 值分别在 0 至 60h、0 至 500.0mT、10.0 至 50.0°C 和 3.0 至 12.0 的范围内变化。结果表明，磁场刺激了活性污泥的驯化和有机污染物的生物降解过程，从而提高了废水处理的效率。磁场下有机化合物的生物降解在 48h 后即可达到稳定状态。随着磁场密度的增加，有机化合物的去除率先迅速上升然后下降，在 20.0mT 时达到拐点。由于磁场的应用，适合微生物生长的温度和 pH 值范围分别为 20.0-40.0°C 和 6.0-10.0，与无磁场时相比有所扩大。
