Ma Degang, Qian Jingjing, Zhu Hongmin, Zhai Jun
a School of Environmental Science and Engineering , Tianjin University , Tianjin , People's Republic of China.
Environ Technol. 2016 Dec;37(23):3046-54. doi: 10.1080/09593330.2016.1175511. Epub 2016 May 4.
Electro-osmotic dewatering (EDW) is one of the effective deeply dewatering technologies that is suitable for treating sludge with 55-80% of moisture content. Regarding EDW as the pre-treatment process of drying or incinerating, this article investigated the drying characteristics of electro-osmosis-dewatered sludge, including shear stress test, drying curves analysis, model analysis, and energy balance calculation. After EDW pre-treatment, sludge adhesion was reduced. The sludge drying rate was higher compared to the non-pre-treated sludge, especially under high temperatures (80-120°C). In addition, it is better to place the sludge cake with cathode surface facing upward for improving the drying rate. An adjusted model based on the Logarithmic model could better describe the EDW sludge drying process. Using the energy balance calculation, EDW can save the energy consumed in the process of sludge incineration and electricity generation and enable the system to run without extra energy input.
电渗脱水（EDW）是一种有效的深度脱水技术，适用于处理含水率为55%-80%的污泥。将电渗脱水作为干燥或焚烧的预处理工艺，本文研究了电渗脱水污泥的干燥特性，包括剪切应力试验、干燥曲线分析、模型分析和能量平衡计算。经过电渗脱水预处理后，污泥的黏附性降低。与未预处理的污泥相比，污泥干燥速率更高，尤其是在高温（80-120°C）下。此外，为提高干燥速率，将泥饼阴极面朝上放置效果更佳。基于对数模型调整后的模型能更好地描述电渗脱水污泥的干燥过程。通过能量平衡计算，电渗脱水可节省污泥焚烧和发电过程中消耗的能量，使系统无需额外能量输入即可运行。
