Pilot-Scale Electrocoagulation with Bipolar Aluminum Electrodes for On-Site Domestic Greywater Reuse

Designing a reclaimed water system provides an economically and environmentally favorable method for disposing of wastewater. However, some critical influences on on-site reclaimed water systems, such as limited building area, often limit the effectiveness of conventional treatment methods. This work established a compact and inexpensive electrocoagulation process with a capacity of $28{\mathrm{m}}^3∕\text{day}$ to reclaim domestic greywater for human noncontact usage. The total unit cost of on-site domestic greywater reuse was $\mathrm{U.S.}\$0.27∕{\mathrm{m}}^3$ , which was below the local potable water rate. Moreover, the treatment facility required an area of $8{\mathrm{m}}^2$ . Both unit cost and required area in this work are lower than those reported in the literature. The experimental results support the feasibility of the on-site reuse of greywater in high-rise buildings.