1 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. “What do I REALLY need to know?” Oklahoma Ag Expo Oklahoma City November 28, 2007 Successful Storage of By-Products

2 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK What’s a by-product anyway? WDG, WDGS, DDG, DDGS,… abc, xyz, …Huh??? Examples of uses Storage Issues…the do’s and don’ts “Non-traditional” crop storage, on going research - your tax dollars at work!!! The Plan…

3 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Definition: Material produced during the process of producing something else. By-Products????

4 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK soap stock - from the refining of vegetable oilsoap stock bran and germ - from the milling of whole grains into refined grainsbrangerm brewer's yeast - from fermentationbrewer's yeast stover - residual plant matter after harvesting of cornstover glycerol - from the production of biodieselglycerol molasses - from sugar refiningmolasses orange oil and other citrus oils - recovered from the peels of processed fruitorange oil pectin - recovered from the remains of processed fruitpectin sawdust and bark- from the processing of logs into lumbersawdustbark straw- from grain harvestingstraw Some Examples

5 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Some Examples distiller's grain – from ethanol fermentation

6 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Alphabet Soup Dictionary WDG = Wet Distiller’s Grain WDGS = Wet Distiller’s Grains with Solubles DDG = Dry Distiller’s Grain DDGS = Dried Distiller’s Grains with Solubles MWC = Modified Wet Cake (Blend of Wet and Dry Distillers Grains) CDS = Condensed Distillers Solubles

7 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Distillers Grains Solubles 1 bushel corn~2.8 gal ethanol ~18 lb CO 2 ~17 lb Distillers grains

8 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK The Process… Slurry / Cooking Distillation Fermentation Beer Ethanol Whole Stillage Milled Grain

9 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK The Process… WDG Thin Stillage (6 – 8% Dry Material) Whole Stillage Wet Distiller’s Grains (35% Dry Material) Centrifuge / Screen

10 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK WDG and DDG Distillers Grains with or without solubles WetDried Solubles

11 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Nutrient Estimates Solubles Corn DDGS Dry matter, %8889 TDN, %8899 NEm, Mcal/lb NEg, Mcal/lb Crude protein, %930 Crude fiber, %28 Crude fat, %4.311 Calcium, % Phosphorous, % Potassium, % Sulfur, %

12 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Wet Distillers Grains with Solubles WDG plus solubles pressed out (45 – 50% dry material) AdvantagesDisadvantages Mixes well Storage PalatableSpoilage High in nutrientsTransportation Lower costVariability

13 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Wet Distillers Grains with Solubles Major issues: Transport via truck Use within 1 week (depending on weather conditions) Mold grows quickly Crusts Freezes Very low pH (3.0 to 4.0)

14 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Wet Distillers Grains with Solubles The Key to Storage of WDGS: Seal and eliminate exposure to air

15 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Wet Distillers Grains with Solubles Mixed with forage (65% moisture content) Bagging successful at 50% moisture content Pictures from University of Nebraska

16 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Mixing WDGS - Forage WDG can be stored when packed with dry forages Minimum level of roughage to mix in WDGS for storage Bag a Bunker Grass hay15%30-40% Wheat straw12.5%25-32% Alfalfa hay22.5%45-55% DDGS50%--- a 300 PSI. Source: Adams et al. - UNL Bunker Storage Mixes 70:30 WDGS:Soybean hulls 50:50 WDGS:Corn silage

17 –Approximately 12% moisture or less. –Can be stored in overhead bins, flat storage, silos…much like bulk feed commodities –Flowability agents to enhance finely ground DDGS. –Mold inhibitors and antioxidants not required if properly processed and stored Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK DDGS

18 Variation in particle size, color, bulk density, nutrient values from refinery to refinery due to… – Different drying equipment, temperatures – Corn sources – Ratio of wet DG to liquid solubles Typical bulk density = lb/cu foot Typical color = “golden yellow” Dark brown can indicate overheating Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Dry Distillers Grains with Solubles

19 If DDGS = $150/ton Then WDGS = $49/ton Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK DDGS vs. WDGS ????

20 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Why such a difference ???? DDGSWDGS 11 – 12% MC50 – 60 % MC Transportation of water Traditional StorageSealed storage and mixing No ShrinkageShrinkage 98% nutrient value of DDGS Long storabilityVery short storability

21 Cost vs. Storage life and Convenience Which by-product works in your operation? Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Decisions…

22 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK More New Tools for your “Toolbox” Winter Canola storage –Canola Handbook –Keep cool –Bin at 10 – 12 % moisture content –Requires aeration to reduce temperatures –Limited insect risk

23 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Canola Storage

24 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK More On-going Research Closed Loop Fumigation Non-Chemical Insect Deterrents and Insecticides Sensors for insect detection, identification Sensors for non-destructive quality assessment Harvest, packaging, storage and transportation of biofeedstock for ethanol production

25 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK Info-Site home/jcarol/ QUESTIONS ????

26 Carol Jones, PhD. Stored Product Engineering Biosystems and Ag. Engr. Dept. Stillwater, OK More On-going Research Closed Loop Fumigation Non-Chemical Insect Deterrents and Insecticides Sensors for insect detection, identification Sensors for non-destructive quality assessment Harvest, packaging, storage and transportation of biofeedstock for ethanol production

Distiller’s Supplementation Distiller’s grains with solubles (DGS) can compliment forage diets –DGS is low in starch, therefore, little or no negative effect on fiber digestion –DGS is high in undegradable (by-pass) protein, therefore, can balance protein supply with forages that are typically high in degradable protein –DGS is high in energy (similar to corn), therefore, can increase energy content of forage-based diets (i.e. hay, crop residues)

Storage of WDGS - Bunker Can be mixed with other feedstuffs and ensiled –70:30 WDGS:Soybean hulls –50:50 WDGS:Corn silage SpoilageRecovery Covered bunker silo3-4 in. 91.5% Uncovered bunker silo12 in. 90.4% Some red and white mold Temperature was >100°F at ensiling, decreased thereafter Iowa, 2006 Field report of WDG stored in piles, covered with salt (1 lb/ft 2 ) and plastic. Kept “very well”.

Recommendations for Cow/calf & Stocker Beef Cattle Fed as a creep feed ingredient ≤50% DDGS in creep feed diet Fed as a supplement to stocker cattle (~ lb) Based on supplemental cost of gain, ≤ 6 lb/hd/d of DDGS Fed as a supplement to late gestation bred heifers/beef cows Paired with low quality forages (corn stalks, low quality hay, etc.) 3-5 lb/hd/d DDGS or 8-14 lb/hd/d WDGS Fed as a supplement to lactating beef cows Paired with low quality forages (corn stalks, low quality hay, etc.) 6-8 lb/hd/d DDGS or lb/hd/d WDGS If feeding for long periods, may consider a custom mineral/vitamin mix – minus phosphorous and sulfur