Turning float into value — recovering oils and fats for rendering or biodiesel, proteins for animal feed, and energy via anaerobic digestion of the high-strength DAF sludge.
The Science Behind Dissolved Air Flotation
The concentrated float that DAF produces is not just waste. In food, dairy, meat and oil-and-gas duties it carries recoverable fats and oils (for rendering or biodiesel), proteins (for animal feed) and a high-energy substrate for anaerobic digestion and biogas — turning a treatment step into a revenue or energy stream.
Recovery routes by stream
Floated fats and oils recovered for rendering or biodiesel feedstock.
Meat and dairy float can yield protein for animal feed.
Concentrated FOG is a valuable rendering and biofuel input.
High-strength float is excellent biogas substrate.
Hygienic design and chemistry where feed/food recovery is intended.
Recovery offsets disposal cost and can create revenue.
| Float stream | Recovered as | Sector |
|---|---|---|
| Fats, oils, grease | Rendering tallow / biodiesel | Meat, food, oil & gas |
| Proteins | Animal feed | Dairy, meat, fish |
| Organic solids | Biogas (via AD) | All high-strength duties |
| Coagulated solids | Soil/compost (where permitted) | Municipal / industrial |
Continue across the DAF science series
The micro-bubble DAF overview and hub.
Read MoreFloat build-up, solids concentration and surface removal.
Read MoreHandling and dewatering the DAF float.
Read MoreMethane potential from high-strength DAF float.
Read MoreOur dissolved air flotation systems range.
Read MoreOur process engineers design dissolved air flotation from first principles — resource recovery and the full bubble physics — for guaranteed removal at minimum lifecycle cost.
Our expertise spans multiple industries with sector-specific water treatment solutions.
Explore closely-related topics, equipment and guides
Send your influent analysis and our engineers assess your process and recommend a tailored treatment solution — free, confidential and no obligation.
Select the regulatory standard for your country — it sets which parameters we need for a compliance-aware process assessment.
Required parameters for the chosen standard are flagged on the sample form. You can still submit a partial set and we will advise what else to test.
Your sample is stored against your company so we can track the project. Provide a company name or email as a minimum.