论文标题
浪费激活污泥的介绍性通过开放式同轴线
Permittivity of waste-activated sludge by an open-ended coaxial line
论文作者
论文摘要
从3 MHz到40 GHz测量了增厚废物活化污泥（WAS）的复杂介电常数。样品的固体含量从重量从4.5％到18％变化。介电性光谱表现出典型的水含量生物组织的特征。在高频率下，观察到debye型分散体，样品中散装水的弛豫率为19 GHz的特征（$γ$ - 分散）。在较低的频率下，样品的固体含量确定了介电常数的特性。所谓的$β$ - 分散归因于细胞膜的充电，发生在10-100 MHz之间。对于具有较高固体浓度的样品，在中间频率（$δ$ - 分散）下观察到了介电常数的实际部分的弱分散体，即结合水的特征。
The complex permittivity of thickened waste activated sludge (WAS) was measured from 3 MHz to 40 GHz. The solid content of the thickened WAS sample was varied from 4.5% to 18% by weight. The permittivity spectra exhibit features typical of biological tissues that have a high water content. At high frequencies, a Debye-type dispersion is observed with a relaxation rate of 19 GHz characteristic of the bulk water in the sample ($γ$-dispersion). At lower frequencies, the solid content of the samples determines the properties of the permittivity. The onset of the so-called $β$-dispersion, attributed to the charging of cell membranes, occurs between 10-100 MHz. For samples with higher solid concentrations, a weak dispersion of the real part of the permittivity, characteristic of bound water, was observed at intermediate frequencies ($δ$-dispersion).
