AT34348B - Process for the production of ammonia from organic nitrogenous substances by fermentation. - Google Patents

Description

  

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   In this case, the added amount of yeast extract po for the first culture should be calculated by bringing 0.1-0.2 g total nitrogen into each liter of liquid.



  In the following operations the doses of yeast extract are gradually increased until a ratio of 4-6 9 nitrogen per liter is finally achieved.



  Acclimatization can also, although not so easily, through successive breeding in
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   The butyric acid bacteria acclimatized in one of these ways can easily be introduced into distillery mash (molasses, beets, grain, potatoes, etc.), as well as into the waste from sugar production. This fermentation not only achieves a substantial yield of butyric acid, but also converts over 90% of the total nitrogen into ammonia.



   For the practical execution of the process with molasses stillage. it is recommended to proceed in the following way:
The molasses liquor (residue of the distillation) is adjusted to a density of 6-70 ball.
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 pass ; After adding 20-50 9 superphosphate and 30-60 9 aluminum sulfate per hectolitre, this stillage is brought to a temperature of 38-420 ('and subjected to butyric acid fermentation.



   The vinasse is preferably made with butyric acid ferments that have already acclimated to amides. During the first 24 hours, air is passed through the mass, the alkalinity of the liquid must always be kept between 1.5-2 g per liter during the entire time. In good conditions, fermentation takes about three days.

   Leaving aside the moment when 90% of the nitrogen has been converted into ammonia. the fermentation go on for 4-5 hours, so the maximum yield is obtained.
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 Instead of fermentation kept in the following operation; The remaining part of the fermented liquid is mixed with 2-3 9 Hchlempekohle per liter and subjected to distillation in order to separate the ammonia, which is then collected and used in a known way.
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 Lime used instead of raw coal.



   When processing the grain mash, it is advisable to filter the mash from the stills through filter presses in order to separate the spent grains. The ones from the
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   stillage.



   In the separation of ammonia from such treated liquors, and especially from grain and beet liquors, very favorable results have been achieved by the so-called "Kestner atomizer", an apparatus which drives the ammonia well out of the liquid because of the draft in it.
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 is moderately lower. because only 45-50% of the total nitrogen is converted into ammonia.



   However, the yield can be increased by a special pretreatment of the stillage freed from the spent grains; The preferred procedure is as follows: The nitrated stillage is mixed with brewer's yeast at a temperature of 400 C.
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** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT CLAIMS: l. Process for the production of ammonia from organic nitrogenous substances. characterized by their fermentation using butyric ferments. <Desc / Clms Page number 3> 2. To carry out the method characterized in claim 1 when treating distillery mash or residues from sugar production, the butyric acid fermentation is carried out at a constant alkalinity, corresponding to 1-2 9 Na OH per liter. 3. To carry out the process characterized in claim l, the acclimatization of the butyric acid ferments to amide-containing substances in such a way that the butyric acid fermentation in the presence of gradually increased amounts of amides, such as glutamic acid, asparagine or dg). or by products of the self-digestion of yeast.