Abstract
Colloidal gas aphrons (CGAs) are micron-sized gas bubbles of 25?30 µm in diameter produced by a high-speed stirrer in a vessel containing dilute surfactant solution. These bubbles, because of their small size, exhibit some colloidal properties. In this work, CGAs were used to separate fine fibres from a lean slurry of cellulosic pulp in a flotation column. The pulp fibres were recovered as foamate from the top. Sodium dodecyl sulphate at a concentration of 2.0 kg/m3 was used as a surfactant to generate the CGAs in a spinning disc apparatus. The results indicated that up to 70% flotation efficiency could be obtained within a short column height of 0.3?0.35 m. This technique can be applied to recover fine cellulosic pulp from paper-machine backwater.
| Original language | English |
|---|---|
| Pages (from-to) | 199-204 |
| Number of pages | 6 |
| Journal | Bioresource Technology |
| Volume | 64 (3) |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jun 1998 |
Keywords
- Agronomy and Crop Science
- Food Science
- Process Chemistry and Technology
- Applied Microbiology and Biotechnology