Hi all
Glycerol may be put into good use
Your attention is drawn to a presentation at the 10th rapeseed conference in Canberra a little while back where those scientist's presented they work
I am not aware of any one using the glycerol by product resulting from biodiesel production as cow chowder in this country
This is an extract presented at the conference by;
Angela Schröder and Karl-Heinz Südekum
Abstract
Glycerol can be derived from the production of biodiesel. It is a glucogenic substance similar to propylene glycol, which has been used effectively to prevent ketosis in high yielding dairy cows. This study was conducted to evaluate the potential of glycerol of three different purities in diets for ruminant's . Energy concentrations of glycerols and of glycerol containing diets were determined in vitro and in vivo as related to different types of concentrates, i. e., high in starch versus low in starch. Glycerols at concentrations of up to 10% of total diet dry matter were compared with starch as rapidly fermentable carbohydrate source as related to estimates of ruminal fermentation, microbial biomass production, and nutrient digestibilities in steers at 85% of ad libitum intake. Additionally, we evaluated the physical, chemical and hygienic qualities of concentrate pellets containing glycerol of different purities at different concentrations and stored under different environmental conditions.
Pellet quality, in particular hygienic quality, was positively influenced by glycerol. Estimated energy concentrations from digestibility trials in vivo were 8.3 and 9.5 MJ net energy for lactation/kg of glycerol when glycerol was fed in combination with a high and a low starch concentrate, respectively. From the in vivo data it can be concluded that glycerol of different purities can replace rapidly fermentable starches in diets for ruminants up to concentrations of 10% of diet dry matter without negatively affecting feed and water intake, ruminal nutrient degradation and whole-tract nutrient digestibilities. Rumen microbial biomass production was not different among the diets containing starch or glycerol. The glucose precursor glycerol may improve energy supply to high yielding dairy cows, both before and after calving and thereby have an impact on health and performance during the entire lactation.
the full article can be found at this link which should be read in full
http://www.regional.org.au/au/gcirc/1/241.htm#P0_0
It includes all of the test carried out as well as the results of these feeding trials
May be some of you with animals can get some milage out of it,
It seems that it is good tucker for lactating cows as well as steers (ruminants)
You dairy farmer mate may be greatfull for a low cost feed and you can get a few dollars for it
I would have thought that at about $50.00-80.00 per 200 L drum both would be winners
The biodiesel guy gets a few dollars without having to worry about geting rid of the stuff and the farmer gets a bargain in ME value for his money
I am drawing a parallel with the cost of mollasses here a common suplement for cows
It would be good to get some feedback here in the forum if any one is going to have a go
I suggest that the local animal nutrition guy from the Department should be consulted as well
It may turn out that he/she may not be aware of this work therefore they should be made aware of it
Finally if this is a good as it reads at face value we than have an outlet for the stuff
Cheers
Chris
Glycerol may be put into good use
Your attention is drawn to a presentation at the 10th rapeseed conference in Canberra a little while back where those scientist's presented they work
I am not aware of any one using the glycerol by product resulting from biodiesel production as cow chowder in this country
This is an extract presented at the conference by;
Angela Schröder and Karl-Heinz Südekum
Abstract
Glycerol can be derived from the production of biodiesel. It is a glucogenic substance similar to propylene glycol, which has been used effectively to prevent ketosis in high yielding dairy cows. This study was conducted to evaluate the potential of glycerol of three different purities in diets for ruminant's . Energy concentrations of glycerols and of glycerol containing diets were determined in vitro and in vivo as related to different types of concentrates, i. e., high in starch versus low in starch. Glycerols at concentrations of up to 10% of total diet dry matter were compared with starch as rapidly fermentable carbohydrate source as related to estimates of ruminal fermentation, microbial biomass production, and nutrient digestibilities in steers at 85% of ad libitum intake. Additionally, we evaluated the physical, chemical and hygienic qualities of concentrate pellets containing glycerol of different purities at different concentrations and stored under different environmental conditions.
Pellet quality, in particular hygienic quality, was positively influenced by glycerol. Estimated energy concentrations from digestibility trials in vivo were 8.3 and 9.5 MJ net energy for lactation/kg of glycerol when glycerol was fed in combination with a high and a low starch concentrate, respectively. From the in vivo data it can be concluded that glycerol of different purities can replace rapidly fermentable starches in diets for ruminants up to concentrations of 10% of diet dry matter without negatively affecting feed and water intake, ruminal nutrient degradation and whole-tract nutrient digestibilities. Rumen microbial biomass production was not different among the diets containing starch or glycerol. The glucose precursor glycerol may improve energy supply to high yielding dairy cows, both before and after calving and thereby have an impact on health and performance during the entire lactation.
the full article can be found at this link which should be read in full
http://www.regional.org.au/au/gcirc/1/241.htm#P0_0
It includes all of the test carried out as well as the results of these feeding trials
May be some of you with animals can get some milage out of it,
It seems that it is good tucker for lactating cows as well as steers (ruminants)
You dairy farmer mate may be greatfull for a low cost feed and you can get a few dollars for it
I would have thought that at about $50.00-80.00 per 200 L drum both would be winners
The biodiesel guy gets a few dollars without having to worry about geting rid of the stuff and the farmer gets a bargain in ME value for his money
I am drawing a parallel with the cost of mollasses here a common suplement for cows
It would be good to get some feedback here in the forum if any one is going to have a go
I suggest that the local animal nutrition guy from the Department should be consulted as well
It may turn out that he/she may not be aware of this work therefore they should be made aware of it
Finally if this is a good as it reads at face value we than have an outlet for the stuff
Cheers
Chris
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