chapter  11
18 Pages

Extrusion-Assisted Extraction: Alginate Extraction from Macroalgae by Extrusion Process

The extrusion process was historically developed for the polymer and food industries; however, lately, speci™c capacities of this process were exploited for extractive

11.1 Introduction .................................................................................................. 323 11.2 Extrusion Process for Extraction .................................................................. 324

11.2.1 Extrusion Process Principle ............................................................. 324 11.2.2 Inªuencing Parameters in Extrusion Process .................................. 326 11.2.3 Speci™cities of Extruder as a Reactor ............................................... 326 11.2.4 Extrusion Applications .................................................................... 327

11.2.4.1 Classical Applications of Extrusion ................................... 327 11.2.4.2 Extractive Applications of Extrusion ................................. 328

11.3 Example of Extrusion-Assisted Extraction: Alginate Extraction from Macroalgae .................................................................................................. 331 11.3.1 Classical Extraction of Alginates in Batch Process: Principle

and Limits ......................................................................................... 331 11.3.2 Alginate Extraction by Extrusion Process ........................................ 333

11.3.2.1 Alginate Extraction Experiments ...................................... 333 11.3.2.2 Analysis for Evaluation of Batch and Extrusion

Processes ............................................................................ 334 11.3.3 Batch and Extrusion Comparison for Alginate Extraction ............... 334

11.4 Conclusion .................................................................................................... 337 Acknowledgments .................................................................................................. 337 References .............................................................................................................. 337

applications. Extrusion-assisted extraction appears to be of great interest for several applications. Hence, this chapter aims at presenting this new development in the extrusion process.