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Dewatering of a biological industrial sludge by electrokinetics-assisted filter press

机译：电动辅助压滤机对生物工业污泥进行脱水

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摘要

The objective of this work was to evaluate the performance of biological industrial sludge dewatering by a pilot-scale filter press assisted by electrokinetics (EK). In all experiments the following conditions were kept constant: (1) dry solids content in the sludge feed: 5.0 wt%; and (2) constant electric-current mode. Application of 1A and 4 A of electric current for 45 min for dewatering was capable of yielding sludge filter cakes with moisture contents of 65.0% and 53.2%, respectively. However, the former would provide a better compromise between the residual moisture content and the electricity cost. This practice has been shown to be cost-effective. The reduction of sludge moisture content might be ascribed to the mechanisms of mechanical pressure, electroosmosis, and ohmic heating in said dewatering system. The estimated electroosmotic permeability was found to be comparable to that of reported by other researchers.
机译：这项工作的目的是通过电动（EK）辅助的中试压滤机评估生物工业污泥的脱水性能。在所有实验中，以下条件保持恒定：（1）污泥进料中的干固体含量：5.0重量％; （2）恒定电流模式。施加1A和4A的电流45分钟进行脱水，能够产生水分含量分别为65.0％和53.2％的污泥滤饼。但是，前者将在残留水分含量和电费之间提供更好的折衷。这种做法已被证明具有成本效益。污泥水分含量的减少可能归因于所述脱水系统中的机械压力，电渗和欧姆加热的机理。发现估计的电渗渗透率与其他研究人员报道的相当。

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