RECLAMATION OF PCB WASTEWATER

Abstract

Wastewater from electronic printed circuit board (PCB) factories was subjectedto lab-scale ion exchangers of two types: strong acid cation followed by weak baseanion exchanger. The experimental investigation was directed to study the ionexchanger performance in terms of three different parameters namely (TDS, feedrate and bed depth). Box-Wilson composite rotatable design was adopted indesigning the experiments. Breakthrough times of (PCB) wastewater were studiedthrough TDS ranged between 317 to 1193 ppm, feed rate ranged between 0.712 to4.980 l/h, and bed depth of cation exchanger ranged between 9.4 to 60.6 cm andanion exchanger ranged between 14.3 to 91.0 cm.Simulation the effect of the studied variables through their pre-designed rangesin terms of breakthrough time by 2nd order polynomial equation was obtained. Ingeneral, the performance and characteristics of adopting two bed deionizers (cationand anion beds) was proved efficient for the removal of the ionic contaminants andnot less than 95 % of wastewater is recycled. In addition, the research considers thetreatment of highly metals content regenerant solution out coming fromreclamation system to minimize its metal content. The reclamation of wastewaterwas studied in terms of breakthrough time (i.e., the leakage of the cations).