Feasibility of electrocoagulation/flotation treatment of waste offset printing developer based on the response surface analysis

Abstract

In the printing plate developing process, the offset printing developer undergoes changes, as well as enrichment by the various chemicals, i.e. metals, organic binders and photosensitive compounds. The objective of this study was to investigate the electrocoagulation/flotation (ECF) treatment efficiency for the removal of copper, turbidity and organic substances from the waste offset printing developer (WOPD). The effect of operational parameters, such as electrode materials, current density, interelectrode distance and operating time, was studied. Also, the response surface analysis was applied to evaluate the effect of main operational variables and to get a balanced removal efficiency of investigated WOPD parameters by ECF treatment. The removal efficiency increases significantly with the increasing of operating time and mainly increases with the increasing of current density. The obtained results show that the interelectrode distance and combinations of electrodes determine the removal efficiency of copper, turbidity and organic substances. Based on the obtained results, the optimized parameters for the ECF treatment removal of investigated WOPD parameters were identified as: Al(À)/Fe(+) electrode combination with interelectrode

The Treatment of Landfill Leachate by Electrocoagulation to Reduce Heavy Metals and Ammonia-Nitrogen

“…During the process, aluminium plate produced fast reaction, unlike the zinc and iron plates, which were slower. The adsorption of Al 3+ ion with colloidal pollutants in the treatment caused coagulation [18]. When the aluminium plate was immersed in the leachate sample with electric current, the coagulation process started to produce bubbles at the surface of the liquid (leachate) in the beaker and form the sludge.…”

Application of Electro-Coagulation for Treatment of Wastewater From Package Printing Process

“…With the increase of applied voltage from 5 to 30 V, there was a substantial increase in the removal efficiencies of COD and color. This behavior can be easily explained by the increase in the generation rate of coagulant and bubble, as a result of the increase in current density [4]. However, there were not much different in both COD and color in the effluents obtained by 30 and 40 V-EC treatments.…”

“…Among these methods, electrocoagulation (EC) has been proposed as an effective method for treatment various types of wastewater from textile, paper mill, baker's yeast, restaurant, and chemical mechanical polishing [2,3]. However, there is very rare report on the application of this technique for printing ink wastewater [4].…”

“…Since many studies conducted the EC treatment with mixing conditions to maintain the homogenization of the solution [4,5], we also tested the effects of mixing and different stirring speeds (100-400 rpm) on the removals of COD and color. As can be seen from Fig.…”

Electrocoagulation treatment of the food dye waste industry: Theoretical and experimental study

“…The limitation of a classical method can be avoided by optimizing all the affecting parameters collectively by statistical experimental design such as response surface methodology [23]. Several research studies have used the methodology of response surface [24][25][26][27][28] to optimize different parameters which could influence the quality of waste treatment efficiency.…”