Name

Electrocoagulation of phosphates from alternating wastewaters utilising a hybrid set-up

Speakers

Joseph Ellwi

Authors

Joseph Ellwi, David Watson, Erin Beadle, and Sid Nair, University of Surrey, UK

Description

A hybrid electrode configuration in a monopolar set up was used to investigate electrocoagulation (EC) performance in relation to phosphate remediation from different types of water. Al and Fe sheets were implemented as electrodes with electrolytes comprising of either fully synthesised wastewater, municipal water or an amalgamation of the two. Careful control of certain variables such as; inter electrode distance (IED) 5 mm, electrolysis time 6 hours, Voltage 1 V and effective electrode surface area ≈ 80 cm2 were necessary to draw decisive conclusions from these experiments. Performance parameters including removal efficiency %, phosphorus removal capacity mg/g, faradic yield % and residual phosphate concentration mg/L are reported. Various anode and cathode electrode combinations were analysed, with electrolytes consisting of representative phosphate concentrations to mimic pollutant wastewater. The Al anode and Fe cathode configuration on a municipal synthetic electrolyte produced optimal results, with removal efficiencies in excess of 99%, residual phosphate concentration being definitively below 0.1 mg/L and the phosphorus removal capacity (mg/g) and faradic yield (%) were also comparable to that in the literature. Materials analysis of the solid coagulants produced confirmed that phosphate was being removed from the system and XRD demonstrated amorphous phases.

Time

-

Location Name

Ludlow Concourse

Track

Posters