Development of a Complex Treatment Process for Recycling Household Laundry Water

Abstract The goal of our research is to study the treatment possibilities of the laundry water fraction of domestic greywater as an alternative water source, as well as to apply a complex treatment method with which we obtain purified greywater. This treated water can be used during household tasks that do not require drinking water. By optimizing each treatment step, we determined a complex process with the following steps: coagulation- quartz sand filtration-oxidation. We also investigated the usability of purified greywater for irrigation by performing a standardized seedling test and determining the SAR factor. In conclusion, based on the measured and analysed water analytical parameters, we have successfully applied an appropriate complex treatment method, using optimal amounts of chemicals, which according to international recommendations can be potentially reused at household level, and can also be used for irrigation purposes.