Reliable High-Quality Effluent Across Diverse Algal Profiles with the SAF® System

The Suspended Air® Flotation (SAF®) system is an advanced solution for achieving low-turbidity effluent, consistently delivering levels below 1 NTU across various algal profiles and wastewater compositions. Its unique design allows it to handle a wide range of algal blooms, meeting or exceeding regulatory standards such as California’s Title 22 requirements for tertiary treatment. Proven through multiple installations in diverse settings, SAF® demonstrates both versatility and reliability.

Unlike conventional dissolved air flotation (DAF) systems, SAF® leverages microbubbles called “aphrons,” created through a froth-based mechanism. These microbubbles, typically 7–25 microns in size and enhanced with optimized surface charges, efficiently capture algae to form a stable, floatable layer that is easily skimmed. By adjusting the system’s coagulants and polymers to the specific algal characteristics, SAF® ensures effective floc formation and maintains effluent clarity that stays well within regulatory thresholds.

SAF® stands out for its capacity to achieve & maintain exceptional clarity across a variety of algal profiles, supporting facilities in reliably meeting stringent water quality requirements.

Case Studies Demonstrating SAF® Performance Across Diverse Conditions

Graton Community Services District, CA

In Graton, CA, a SAF® system was integrated into the local treatment plant, which serves a small rural community. Here, the system faced varied algae profiles due to seasonal shifts and nutrient fluctuations in the oxidation and settling ponds. SAF® effectively handled these variations, consistently achieving effluent turbidity well below the Title 22 requirement of 2 NTU. Paired with a downstream filter, the SAF® setup allowed for a nearly maintenance-free tertiary treatment process with effluent turbidities as low as 0.5 NTU. The community reported >98% removal of total suspended solids (TSS) and an impressive 92% reduction in biological oxygen demand.

Pleasant Valley State Prison, CA

An installation at the Pleasant Valley State Prison in Coalinga, CA, highlights SAF®’s robustness in environments with high algal loads. The prison’s 0.65 mgd aerated lagoon system previously experienced significant algal bloom concentrations—sometimes exceeding 60 ppm—posing a challenge for downstream filtration systems. The SAF® unit consistently produced effluent turbidity levels averaging 0.45 NTU even under these conditions. This result not only met Title 22 standards but also significantly reduced the strain on subsequent filtration systems, enabling extended operational cycles with less required maintenance.

Primary Water Treatment Results

Outlined below are the results from a municipal trial of Suspended Air® Flotation (SAF®) for algae and silt removal. On the first day, the SAF® system exceeded the customer’s target for NTU reduction. Within just a few days, it surpassed their expectations, leading to SAF® being selected and successfully installed.

SAF® is the Sustainable Solution for Algae Removal:

Advantages of SAF® for Algae-Impacted Effluent