Page 1 of 4 1234 LastLast
Results 1 to 10 of 37

Thread: Glycerol use as stockfeed

  1. #1
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Glycerol use as stockfeed

    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
    Last edited by Chris; 5th July 2006 at 06:28 PM.

  2. #2
    Join Date
    Oct 2005
    Posts
    524

    Re: Glycerol use as stockfeed

    There was some discussion about 'glycerin' being used as a stock feed over on the infopop forum some time ago. One fellow said his cows came running for it.

    It was suggested that the residual methanol would poison the cows, but apparently cattle process methanol differently than humans.

  3. #3
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Re: Glycerol use as stockfeed

    Quote Originally Posted by Terry Syd
    There was some discussion about 'glycerin' being used as a stock feed over on the infopop forum some time ago. One fellow said his cows came running for it.

    It was suggested that the residual methanol would poison the cows, but apparently cattle process methanol differently than humans.
    Hi Syd
    You are quite right However this is the first scientifically based research that I have come accros which is I suppose is some "proof" that it really works for the cow as well
    I have no doubt that they will come running the stuff is sweet it seems that they also do that when you give them molasses
    The report indicates that it was fed Ad Libitum I think that means they were free to eat as much as they wanted
    I hope that people can put the stuff to good use
    Cheers
    Chris

  4. #4
    Join Date
    Oct 2006
    Location
    Margaret River, Western Australia
    Posts
    12

    Farming fuel, was Re: Glycerol use as stockfeed

    This is a great forum. I was chasing around after glycerol by-product utilisation and here we are, back here again . . . . This thread is a tad dated, so please excuse me if I go off on a tangent.

    I think what Chris has written is very much on the right track, except that being a lot closer to farming than more conventional motor industry people, and so many years in dryland Permaculture, I see less of a win-win on glycerol as stock feed additive on pressed seed cake, or other options, than greater integration of whole systems as such.

    Our calculations here locally have it that a 12,000 litre/day biodiesel plant fed with canola requires some 2,400 hectares per annum to keep it going. Just one of our very small clients would need to control a whole square mile farm entirely to be viable, and then some. Quite a lot more, in fact, depending on the season, and El Ninio, and all the rest of it, and all of it in very dry country.

    In that respect biofuels are a by-product of good farming practice, not the other way around. I mean, no offence intended, we have to go talk to serious farmers about this, not motor industry or fuel supply people.

    Out Bourke way the town is dying because there is no cotton crop any more, with no water coming down, but they could as easily be growing Jatropha if not canola, or any of a number of source crops, while at once feeding back into the landscape and only trucking out the by-product to fuel the cities, where once they clothed the cities.

    Here in Western Australia things haven't changed that much, nor in Khazakstan or such places that have yet a great deal to teach us.

    Am I making sense? That is the scale I am thinking on, at any rate.

    Gil

  5. #5
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Re: Glycerol use as stockfeed

    Hi Gil
    Yes you are making sense Now as you said you have to talk to farmers so as to get the message across which is no easy task
    Bill Mollison started the permaculture movement as well as giving it a name he is an Aussie
    Peter Andrews with his Natural sequence farming is also an Australian
    They have devoted they lives to the cause
    Both where looked upon like loonies by the other farmers in the districts where they practiced
    The aussie farmer is a very tough individual who does quite well considering the conditions of this dry country
    Your notion is in my view correct It is never to late to start so as to stop the export of soil and it's nutrients from the farm to the city where it is flashed away into the sea or landfill
    A closed farming system as practiced in those far away "backward" countries you mentioned have been doing it for centuries the land still yields them a living
    For your information I did post something on the canola biodiesel for farm use a few weeks ago do a search for it it may be of some help to you
    The thread went a bit quite may be we live it up again as I think it is important
    Cheers
    Chris
    Never give up :)

  6. #6
    Join Date
    Jul 2006
    Location
    western australia
    Posts
    50

    Re: Glycerol use as stockfeed

    Glycerol is one of the ingedients that we will be trialling in a sheep pellet that we hope to make from canola meal.
    Supply will be the hardest problem as there are more valuable ways of using it.
    Cheers
    Maxwell

  7. #7
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Re: Glycerol use as stockfeed

    Maxwell
    Glycerin from biodiesel production sells anywhere from $50-300 per tonne it is all a case of who has an order to fulfill for overseas soap makers as well as who needs to clear his stockpile
    In other words there is no such thing as an established or a mature market for the product in this country
    I am not so sure that the stuff will replace molasses in pellet production as there is not enough of it around yet so as to be taken up by major manufacturers of stock feeds
    All the same it performs quite well as a supplement for dairy cows as well as any other ruminant
    Will be keen to see your results once you get into it
    Cheers
    Chris
    Never give up :)

  8. #8
    Join Date
    Jan 2006
    Location
    ลึก ประเทศอินเด&
    Posts
    2,185

    Re: Glycerol use as stockfeed

    Hello Chris,
    Is the glycerine from biodiesel making you refer to that can be sold for between $50- $300 a tonne after the glycerine has been cleaned up?
    As I recall, there is something like 74ml glycerol produced per litre of oil reacted and is typically less than 50% of the byproduct, the rest of the byproduct is mostly methanol, soap and biodiesel.
    What purity of glycerine is required if you wish to sell it?
    Who does one contact to sell glycerine to?
    What quantities would one need for anyone to be interested in buying it?
    In the USA several people who have looked into selling their glycerine have reported that Possible purchasers of this glycerine were only interested in Train tanker car loads which would likely take some people several years to accumulate from their backyard production.

    Tilly

  9. #9
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Re: Glycerol use as stockfeed

    Hi All
    A good friend as well as a buis associate buys and exports glycerine as it comes out from biodiesel production
    The only criteria he looks for is "flash point" it can not be to high I am not sure what it is but I can find out, it is rare that he rejects a load due to that any way
    This is the only thing that he checks for, he takes it in bulk or in 1000 L pails he then put it into 205 L drums into 20 Foot containers and sends it off
    It is quite funny, the Nepalese demand that it is in green painted reconditioned drums and no other colour or plastic drums
    When I queried as to why he told me that his buyer there is a soap manufacturer who then sells the empty drums to roofing contractors who flatten out the drums and use them for that purpose
    They then sell the bottoms and tops to other metal bashers who make wok's out of them
    So here we are clean Nepalese as well as nothing wasted there
    Cheers
    Chris
    Never give up :)

  10. #10
    Join Date
    Jun 2006
    Location
    melbourne
    Posts
    421

    Re: Glycerol use as stockfeed

    Hi Tilly
    He will buy any qty in 205 L drums They do not have to be green either
    If you where to tell me what qty you have and where you are I can make some inquiries for you
    That goes for any one else here as well who has glycerine to dispose off
    Cheers
    Chris
    Never give up :)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •