Document Type

Thesis - Open Access

Award Date

2020

Degree Name

Master of Science (MS)

Department / School

Animal Science

First Advisor

Tofuko Woyengo

Keywords

DDGS, Enzymes, Nutrition, Pigs, Pretreatment, Whole stilliage

Abstract

The high fiber content of corn dried distillers’ grains with solubles (DDGS) can limit its utilization in swine diets. Pretreatment with heat and enzymatic predigestion of whole stillage (WS; slurry material that is dried into DDGS) can alleviate negative effects of dietary fiber and can improve digestive and fermentation characteristics of the feedstuff. However, optimal time and temperature of the heat pretreatment of WS, and best enzymes for predigestion of WS have not been identified. Experiments were conducted to identify optimal conditions for heat pretreatment and multienzyme predigestion of WS for pigs. First experiment was conducted to identify optimal temperature and time for later use in largescale pretreatment of WS for in vivo studies. The treatments were untreated WS, and WS that was pretreated (at 70 psi) for 10, 20, or 30 minutes and at 100, 120, 140, or 160°C in a 3 × 4 factorial arrangement. Sub-samples were subjected to porcine in vitro digestion and fermentation. An increase in pretreatment temperature linearly and quadratically increased (P

Library of Congress Subject Headings

Swine -- Feeding and feeds.
Distillers feeds.
Distilling industries -- By-products.
Enzymes.
Digestion.

Format

application/pdf

Number of Pages

181

Publisher

South Dakota State University

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Rights Statement

In Copyright