ENVIRONMENTAL ASPECTS OF THE PRODUCTION AND USE OF  CORN OIL BIODIESEL

The present paper reviews the environmental aspects of the production and use of corn oil-based biodiesel. The environmental aspects are analyzed by considering the used-corn oily feedstocks and production technology. Besides that, the possibilities for the improvement of the biodiesel production process are emphasized. The most valuable corn-oil feedstocks are waste corn oil and corn distillers oil obtained primarily from dried distillers grains with solubles (DDGS). The use of DDGS, a by-product of ethanol production, for biodiesel production and glycerol, a by-product of biodiesel production, as a substrate for ethanol production, allows the development of an integrated ethanol/biodiesel production and contributes to the elimination or minimization of wastes and the production of the added-value products. Biodiesel is a degradable, less-toxic, safe, and generally, clean-burning fuel with exception of NOx emission that can be reduced by the appropriate methods but further investigations are desirable. Key words: corn oil, biodiesel, environmental aspect, ghd emission, pollution

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Effect of Distillers Feedstuffs and Lasalocid on Campylobacter Carriage in Feedlot Cattle

Journal of Food Protection ◽

10.4315/0362-028x.jfp-14-169 ◽

2014 ◽

Vol 77 (11) ◽

pp. 1968-1975 ◽

Cited By ~ 2

Author(s):

ROBIN C. ANDERSON ◽

ROGER B. HARVEY ◽

TRYON A. WICKERSHAM ◽

JIM C. MacDONALD ◽

CHRISTIAN H. PONCE ◽

...

Keyword(s):

Amino Acid ◽

Foodborne Pathogens ◽

Basal Diet ◽

Feedlot Cattle ◽

Distillers Grains ◽

Fecal Samples ◽

Distillers Grains With Solubles ◽

Dried Distillers Grains ◽

Undegradable Intake Protein ◽

Corn Distillers

Campylobacter bacteria are foodborne pathogens that can colonize the gut of food animals. Limited in their ability to ferment sugars, Campylobacter can derive energy for growth via amino acid catabolism. The objectives of the present studies were to test whether supplemental distillers grains containing high amounts of rumen-undegradable intake protein or supplemental lasalocid may, by promoting amino acid flow to the lower bovine gut, increase intestinal carriage of Campylobacter. In study one, 10 steers (5 per treatment) were adapted to diets formulated to achieve 0 or 30% dried distillers grains. After an initial 14-day adaptation to the basal diet, control and treated steers were fed their respective diets for 23 days, after which time they were fed supplemental lasalocid for an additional 8 days, followed by a 5-day withdrawal. In study two, 24 steers preacclimated to a basal diet were adapted via 3-day periodic increases to dietary treatments formulated to achieve 0, 30, or 60% wet corn distillers grains with solubles. Analysis of Campylobacter bacteria cultured from duodenal and fecal samples in study one and from fecal samples in study two revealed no effect of dried distillers grains or wet corn distillers grains with solubles on the prevalence or concentrations of duodenal or fecal Campylobacter. The results from study one indicated that colonized steers, regardless of treatment, harbored higher Campylobacter concentrations when transitioned to the basal diet than when coming off pasture. Campylobacter carriage was unaffected by lasalocid. These results provide no evidence that feeding distillers grains high in rumen-undegradable intake protein or supplemental lasalocid contributes to increased intestinal carriage of Campylobacter in fed cattle.

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Effect of dried distillers’ grains with solubles on enteric methane emissions and nitrogen excretion from finishing beef cattle

Canadian Journal of Animal Science ◽

10.4141/cjas2012-151 ◽

2013 ◽

Vol 93 (3) ◽

pp. 373-385 ◽

Cited By ~ 16

Author(s):

M. Hünerberg ◽

S. M. McGinn ◽

K. A. Beauchemin ◽

E. K. Okine ◽

O. M. Harstad ◽

...

Keyword(s):

Beef Cattle ◽

Corn Oil ◽

Methane Emissions ◽

Barley Grain ◽

Distillers Grains ◽

Nitrogen Excretion ◽

Distillers Grains With Solubles ◽

Dried Distillers Grains ◽

Enteric Methane ◽

Finishing Beef Cattle

Hünerberg, M., McGinn, S. M., Beauchemin, K. A., Okine, E. K., Harstad, O. M. and McAllister, T. A. 2013. Effect of dried distillers’ grains with solubles on enteric methane emissions and nitrogen excretion from finishing beef cattle. Can. J. Anim. Sci. 93: 373–385. The objective of this study was to examine the impact of corn- or wheat-based dried distillers’ grains with solubles (CDDGS, WDDGS) on enteric methane (CH4) emissions from finishing beef cattle, and to determine if any observed reductions were a result of the fat content of CDDGS. A second objective was to compare the effect of CDDGS or WDDGS on N excretion. The experiment was designed as replicated 4×4 Latin square with 28-d periods using 16 ruminally fistulated crossbred heifers. The control diet contained 87% barley grain, 8% barley silage and 5% supplement (dry matter; DM basis). Treatment diets were formulated by replacing 40% DM of barley grain with CDDGS, WDDGS, or corn oil supplemented WDDGS (WDDGS+oil). For the WDDGS+oil diet 6.5% corn oil was added to WDDGS (3.4% fat DM) to achieve a similar fat level as in CDDGS (9.7% DM). All diets were fed as total mixed rations once daily ad libitum. Total collection of urine and faeces was conducted between days 18 and 21. Methane was measured between days 25 and 28 using four identical open circuit respiratory chambers. Compared with WDDGS, feeding CDDGS and WDDGS+oil reduced (P<0.05) CH4emissions as a percentage of gross energy intake (GEI) from 5.5 to 4.0 and 4.2%, respectively. Feeding CDDGS also reduced (P<0.05) CH4emissions compared with the control (5.0% of GEI), while WDDGS+oil tended (P=0.08) to elicit a similar response. Methane (% of GEI) between WDDGS and the control did not differ (P=0.29). Excretion of total N was greater (P<0.001) for CDDGS, WDDGS and WDDGS+oil (220, 253, and 265 g d−1) compared with the control (143 g d−1). Although oil appears to be responsible for reducing CH4emissions when DDGS is included in the diet, increased N excretion requires that a complete life cycle assessment be conducted to assess the full impact of DDGS on greenhouse gas emissions from finishing cattle.

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