The re-usages of wastewater within industry: the positive impact of contaminants

The benefit of this technique is the saving of fresh water and a more efficient operating of the absorption system because of including the contaminants within wastewater. This re-usage of wastewater was tested on an existing formalin process regarding a current methanol process that allows the saving of 5478 kg/h of fresh water during the absorber system by replacing it with wastewater, containing the allowed quantities of 30 kg/h CO2 and 50 kg/h methanol. The wastewater with inclusive methanol had a positive impact on the balance during the absorber system, more formaldehyde could be absorbed within the solvent, and therefore could produce 37% instead of 35% formalin, which was the aim of this study. The benefit of this technique is to save fresh water by using wastewater transformation from one to another process.