Industrial Wastewater Treatment Water Reuse Technology

The technology and mechanism of advanced treating dyeing treated wastewater by electrolysis and electrolysis梐dsorption methods were studied in this paper. And feasible reuse treating technology were given in this paper. The aluminum electrode was selected as anode material when the advanced treating technology was soluble anode electrolysis. The experiments indicated that current density, electrolysis time and PH value of influent were the main factors which had effect on the rate of ~ODcr and iron removal. The optimization of soluble anode electrolysis were: Current intensity: i8OA/m2 Electrolysis time: 16. 5mm; Jnfluent pHvalue: 6. Then the experiment of sequential process which was : Treated wastewater was treated by soluble anode electrolysis, then sedimentation, then adsorption of activated carbon, indicated that the treated water was completely meeting with the standard for process water of dyeing and printworks. Environmental and economic benefits were obtained by applying the sequential process. Activated carbon F?, which had biggish specific surface area, iodine value and methylene blue value, was selected to be the sorbent by adsorption performance index measurements for activated carbons. The specific surface area, iodine value and rnethylene blue value of F? were 161. 44m2/g, 911.678mg/g, 194.403mg/g respectively. Factors affecting the treatment effect were studied, such as current density, electrolysis time and influent pH value. The optimization of indissoluble anode electrolysis were: i47A/n12 tl5min; pH7; electrode: Ti alloy. The experiment of advanced treating dyeing treated wastewater by electrolysis梐dsorption method and having septum or not affecting teatment effect were studied, and the mechanism and reason were discussed. Treated vm Abstract water by the method was attained to the degree: cODcr5lmg/1, SS~l 1. 8mg/i, pH~7. 0, Fe0. 034mg/L, Total hardness7. 0, chromaticity color4, which was meeting with the standard for process water of dyeing and printworks except for total hardness. It was shown that wastewater treated by the sequence process which was wastewater treated soluble anode electrolysis, then sedimentation, electrolysis梐dsorption, can completely attain to the reuse water degree. In addition, the mechanism of electrolysis梐dsorption treating technology was discussed in details.