Vertical garden for treating greywater

Arthur Phaoenchoke McDonald, Alejandro Montoya, Fernando Alonso-Marroquin
A growing implementation of greywater reuse (GWR) pract ices may lead to bene fits on the wastewater side of the urban water cycle. In addition to the positive effect in decreasing urban water demand, GWR changes the quantity and quality characteristics of domestic wastewater released to sewers and conveyed to wastewater treatment plants. Coagulant selection is not an easy task because one coagulant can remove efficiently the suspended solids but at the same time increase the conductivity. This
more » ... conductivity. This makes the final select ion of coagulants very dependent on the relative importance assigned to each measured parameter. In this work, experiments were carried out using wastewater composed by domestic water, powder soap and kitchen oil in similar quantities of water emp loyed for washing dishes. Measurements of pH, electrical conductivity, temperature, total solids and dissolved oxygen were done by analyzing a sample o f 50 mL fro m the final suspension. It was used a tradit ional method of coagulation and decanting treatment using some different volu me of solutions such as a lu min iu m sulphate (concentration of 1000 and 2000 mg/ L), Fe II sulphate and alumin iu m tripoliphosfate with concentration of 2000 mg/ L. According to the findings it could be observed that aluminiu m sulphate provided good results, reducing total solids and not causing changes in the other parameters, fo r examp le, results of pH and dissolved o xygen for the treated water kept close d to the tap water.
doi:10.1063/1.4985557 fatcat:igmf6ssppneudjy2iyz3knoyey