Related Experiment Video
Updated: May 19, 2026

Coupling Carbon Capture from a Power Plant with Semi-automated Open Raceway Ponds for Microalgae Cultivation
Published on: August 14, 2020
Optimising dissolved air flotation/filtration treatment of algae-laden lagoon effluent using surface charge: a
Russell Yap1, Michael Holmes, William Peirson
1Water Research Centre, University of New South Wales, Sydney, NSW, Australia.
Abstract:
Dissolved air flotation (DAF) incorporating filtration (DAFF) is used at the Bolivar wastewater treatment plant (WWTP) to polish lagoon effluent for reuse. Elevated algal populations are frequently experienced and can lead to increased coagulant requirements and process control issues. Streaming current detectors (SCDs) and a charge demand analyser (CDA) were used to monitor the full-scale plant. This was followed by an optimisation study using a pilot plant with a CDA. It was found that the normal operational charge demand range for DAF at Bolivar was between -46 and -40 μeq L(-1). Decreasing the pH of coagulation reduced coagulant consumption and facilitated more sensitive CDA responses to changes in alum dose.
Related Concept Videos
Coagulation
Bioreactor Controls-II
Bioreactor Design and Operational System
Biofuels
Microbial Bioremediation of Hydrocarbons
Colloidal precipitates

