Extruders and Expanders in Pet Food, Aquatic and Livestock Feeds

Extruders and Expanders in Pet Food, Aquatic and Livestock Feeds brings together practical experience and in-depth knowledge of extrusion and expansion cooking technology from industry experts. This concise reference summarizes basic considerations for the application of extrusion and expansion technology to feed industry processes and focuses on the various types of extruders and expanders available for a growing number of feed applications.

Dr. Mian Riaz, editor and Head of the Extrusion Technology Program at Texas A & M University follows the practical short course philosophy he has perfected during 20 years of teaching technical processing techniques. More than 8,000 people have been trained through this program and are applying their knowledge and skills at processing companies throughout industry. He has gathered a group of authors that have extensive experience in their specialties.

Chapters in this book are arranged in a procedural, top-to-bottom approach. First, different designs of extruders (dry, single, twin, universal pellet cooker) and expanders are discussed in detail. The nutritional qualities and processing characteristics of raw materials are covered in two separate chapters. Other chapters explain the pre- and post- extrusion processes of grinding, drying, and coating. More than 80 percent of extrusion systems sold today come with automation and the benefits of operational automation are thoroughly reviewed. Die design plays an important role in shapes, production, as well as creating floating and sinking characteristics in feed. Once feed is made, shelf life, palatability, and microbial control are very important. The last chapter is focused on troubleshooting and extrusion operation.

This book serves as a source of information to anyone involved with the feed industry as a guide for understanding extrusion, the proper selection of the raw ingredients, the operation of extrusion equipment, and the processes involved in running an extended operation.