Laboratoire de Thermique Energétique et Procédés (EAD 1932), UPPA, ENSGTI, rue Jules Ferry, BP 7511, 64075 Pau Cedex, France.
Laboratoire de Thermique Energétique et Procédés (EAD 1932), UPPA, ENSGTI, rue Jules Ferry, BP 7511, 64075 Pau Cedex, France.
Water Res. 2015 Oct 1;82:66-77. doi: 10.1016/j.watres.2015.04.006.
Compared to conventional dewatering techniques, electrical assisted mechanical dewatering, also called electro-dewatering (EDW) is an alternative and an effective technology for the dewatering of sewage sludge with low energy consumption. The objectives of this study were to evaluate the dewatering performance and to determine the influence of the process parameters (e.g. applied electric current, applied voltage, and the initial amount of dry solids) on the kinetics of EDW-process for activated urban sludge. Also significant efforts have been devoted herein to provide comprehensive information about the EDW mechanisms and to understand the relationship between these operating conditions with regards to develop a qualitative and quantitative understanding model of the electro-dewatering process and then produce a robust design methodology. The results showed a very strong correlation between the applied electric current and the filtrate flow rate and consequently the electro-dewatering kinetics. A higher applied electric current leads to faster EDW kinetics and a higher final dry solids content. In contrast, the results of this work showed a significant enhancement of the dewatering kinetics by decreasing the mass of the dry solids introduced into the cell (commonly known as the sludge loading).
与传统脱水技术相比，电辅助机械脱水，也称为电脱水 (EDW)，是一种替代且有效的低能耗污水污泥脱水技术。本研究的目的是评估脱水性能，并确定工艺参数（例如施加的电流、施加的电压和初始干固体量）对活性城市污泥电脱水过程动力学的影响。本文还做出了巨大努力，提供有关 EDW 机制的全面信息，并了解这些操作条件之间的关系，以开发电脱水过程的定性和定量理解模型，然后生成稳健的设计方法。结果表明，施加的电流与滤液流速之间存在很强的相关性，因此电脱水动力学也是如此。施加的电流越高，EDW 动力学越快，最终干固体含量越高。相比之下，本工作的结果表明，通过降低进入细胞的干固体质量（通常称为污泥负荷），可以显著提高脱水动力学。
