Quality Characteristics and Nutritional Profiles of DDGS. Dr. Jerry Shurson Department of Animal Science University of Minnesota

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1 Quality Characteristics and Nutritional Profiles of DDGS Dr. Jerry Shurson Department of Animal Science University of Minnesota

2 DDGS Varies in Nutrient Content and Digestibility, Color, and Particle Size Among U.S. Sources

3 Averages, Coefficients of Variation, and Ranges of Selected Nutrients Among 32 U.S. DDGS Sources (100% Dry Matter Basis) Nutrient Dry matter, % Crude protein, % Crude fat, % Crude fiber, % Ash, % Swine ME, kcal/kg Lysine, % Phosphorus, % Average (4.7) 10.7 (16.4) 7.2 (18.0) 6.0 (26.6) 3810 (3.5) 0.90 (11.4) 0.75 (19.4) Range

4 How Does DDGS Compare to Soybean Meal?

5 Variability (CV, %) of Selected Nutrients Among U.S. DDGS Sources vs. U.S. Soybean Meal Sources Nutrient Crude protein Crude fat Crude fiber Ash Lysine Methionine Threonine Tryptophan Calcium Phosphorus DDGS Soybean Meal

6 1,200 1, Variation in Particle Size Among DDGS Samples Representing 25 U.S. Ethanol Plants 2005

7 1,200 1, Variation in Particle Size Among Soybean Meal Samples Representing 6 U.S. Plants 2005

8 Variation in Bulk Density (Lbs/Cubic Ft.) Among DDGS Samples Representing 25 U.S. Ethanol Plants 1/05

9 Variation in Bulk Density (Lbs/Cubic Ft.) Among Soybean Meal Samples Representing 6 U.S. Plants 2003

10 DDGS Definition and Terminology in the Market

11 Distillers Products Definitions 27.6 Distillers Dried Grains with Solubles is the product obtained after the removal of ethyl alcohol by distillation from the yeast fermentation of a grain or a grain mixture by condensing and drying at least ¾ of the solids of the resultant whole stillage and drying it by methods employed in the grain distilling industry. The predominating grain shall be declared as the first word in the name.

12 Comparison of the Nutrient Content of Corn Distiller s Grains and Corn Condensed Distiller s Solubles DM, % CP, % Fat, % CF, % Ash, % Ca, % P, % 0 Grains Solubles

13 Comparison of Nutrient Composition of Golden DDGS to Other DDGS Sources (100% Dry Matter Basis) Golden Corn DDGS DDGS High Fat DDGS Partial De-germed DDGS Whiskey DDGS Pelleted DDGS Protein, % Fat, % Crude fiber, % No data ADF, % No data Ash, % DE, kcal/kg* No data 3796 No data No data ME, kcal/kg* No data No data Lys, % No data Met, % No data Thr, % No data Trp, % No data Ca, % P, % *Calculated energy values for swine

14 Grain Source Affects Nutrient Content and Digestibility

15 Comparison of Nutrient Composition of Corn DDGS, Sorghum DDGS, and a Corn-Sorghum Blend (As-is basis) Protein % Fat % ADF % Ash % Corn DDGS Sorghum DDGS Corn-Sorghum DDGS Urriola et al. (2006)

16 Comparison of Total Lysine, Methionine, Threonine, and Tryptophan of Corn DDGS, Sorghum DDGS, and a Corn- Sorghum Blend of DDGS for Swine Corn DDGS Sorghum DDGS Corn-Sorghum DDGS Lys Met Thr Trp Urriola et al. (2006)

17 Comparison of Lys, Met, Thr, and Trp Digestibilities of Corn DDGS, Sorghum DDGS, and a Corn-Sorghum Blend of DDGS for Swine Lys Met Thr Trp Corn DDGS Sorghum DDGS Corn-Sorghum DDGS Urriola et al. (2006)

18 Standardized Ileal Lysine Digestibility Coefficients Among 10 Golden Corn DDGS Sources for Swine (Stein et al., 2005) % DDGS Source

19 Differences in Digestible Amino Acid Content Among DDGS Sources for Poultry Digest. AA (%) S1 S2 S3 S4 S5 Noll et al. (2006) 0 Cys Lys Thr Amino acid

20 Prediction of Amino Acid Digestibility Among Sources of DDGS for Swine and Poultry

21 Hunter Lab and Minolta Color Measurements Commission of illumination color scale (Minolta): L* = Lightness a* = redness b* = yellowness Lightness 25% Lightness 50% Lightness 75%

22 Fig. 1. Regression of digestible lys (%) and color (L*, b*) R 2 = 0.71 L*, b* score R 2 = 0.74 L* b* Linear (L*) Linear (b*) Lys (%) Source: Dr. Sally Noll (2003)

23 Prediction of Digestible Lysine from Color (L*, a*, and b*) Among DDGS Sources for Swine In vivo digestible lysine, % R 2 = 0.12, RMSE = 0.10, PC = In vitro digestible lysine, % Urriola et al. (2006)

24 Prediction of Digestible Lysine from Color L*, a*, and b* (L* < 50 in corn DDGS) In vivo digestible lysine, % R 2 = 0.40, RMSE = 0.07, PC = Lightness (L*) Urriola et al. (2006)

25 Prediction of Digestible Lysine Content of DDGS Using Optical Density 60 Light intensity, mn % digestible lysine 0.54% digestible lysine 0.33% digestible lysine Wavelengh frecuency, nm

26 Prediction of Digestible Lysine from Optical Density (400 to 700 nm) 0.80 In vivo digestible lysine, % R 2 = 0.86, RMSE = 0.05, PC = In vitro digestible lysine, %. Urriola et al. (2006)

27 Prediction of Digestible Lysine in DDGS Using Front Face Fluorescence In vivo digestible lysine, % R 2 = 0.98, RMSE = 0.07, PC = In vitro digestible lysine, %. Urriola et al. (2006)

28 Some of the Nutrient Variability Among DDGS Sources is Due to the Use of Different Laboratory Testing Procedures

29 Comparison of AOAC Approved Moisture Testing Methods C for 1 hour C for 3 hours C for 4 hours C for 24 hours

30 Variability of Laboratory Results from the Same DDGS Sample Sent to 5 Different Commercial Laboratories Moisture Fat Protein Lab Lab Lab Lab Lab NIR

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32 An Ideal DDGS Quality Assurance Program for Ethanol Plants Monitor incoming corn for mycotoxins and reject postive loads Standardize the amount of solubles added to the grains fraction to produce DDGS Use minimal drying time and temperature to produce DDGS Dryer temperatures range from 445 F to 1150 F Segregate poor quality DDGS from good quality DDGS when it is produced Price different qualities accordingly Provide transparent and frequent nutrient profile information to customers on the DDGS being produced Specify the testing procedures used to determine nutrient content Become ISO 9000:2001 and HAACP certified

33 Physical Characteristics to Monitor Bulk density Particle size Hunter color scores L* a* b* ph

34 Nutrients to Monitor Moisture Crude protein Crude fat Crude fiber ADF NDF Ash Swine DE, ME, NE (calculated) Starch

35 Minerals Calcium Phosphorus Sulfur Chloride Sodium

36 Amino acids Lysine Methionine Threonine Tryptophan Cystine

37 Mycotoxins Aflatoxins B 1, B 2, G 1, G 2 Deoxynivalenol (DON) Zearalenone Fumonisins B 1, B 2, B 3

38 The Value of New Distiller s By-Products in Swine Diets

39 Comparison of Mineral Content of Dakota Gold DDGS with High Protein Dakota Gold and Corn Protein Concentrate (100% DM Basis) DDGS HP DDGS CPC Ca, % P, % Na, % S, %

40 Comparison of Nutrient Content of Dakota Gold DDGS with High Protein Dakota Gold and Corn Protein Concentrate (100% DM Basis) Protein, % Fat, % NDF, % Ash, % DDGS HP DDGS CPC

41 Comparison of Amino Acid Content of Dakota Gold DDGS with High Protein Dakota Gold and Corn Protein Concentrate (100% DM Basis) Lys, % Met, % Cys, % Thr, % Trp, % DDGS HP DDGS CPC

42 Opportunity Costs of Corn By-Products in Swine and Poultry Diets DDGS Spec. 1 DDGS Spec. 2 HP DDGS Glutenol CPC Swine $80.00 $78.00 $51.00 $63.40 $61.60 Poultry $80.00 $75.20 $53.00 $75.20 $43.00

43 U of M DDGS Web Site We have developed a DDGS web site featuring: * nutrient profiles and photos of DDGS samples * research summaries - swine, poultry, dairy, & beef - DDGS quality * presentations given * links to other DDGS related web sites * international audiences

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