Loading ...
Sorry, an error occurred while loading the content.

42932Re: [new_distillers] Re: Temp

Expand Messages
  • Er. Prashant Jha
    Jan 5, 2013
      In my industry(shree renuka sugars), we have 3 fermenters which works
      on continuous fermentation. We aerate first fermenter at the rate 600
      m3 air per hour with help of blower. Second fermenter is also airated
      bt less than first. Third fermenter is fully anaerobic. The
      development of yeast, cell development and growth occurs in first
      fermenter. Alcohol formation occurs in 2nd and third fermenter.
      Retention time of all three fermenters is 17 to 18 hours only n alc%
      in fermented wash is 8 %. Apart from that we also have yeast
      activation vessel. The yat recieves yeast slurry from decanter where
      yeast and wash gets seperated. Yat is heavily airated and it acts
      culture development vessel. The temperature of fermenter is kept at 33
      degree celcius.

      On 1/4/13, Jeff Kimble <jeff@...> wrote:
      > Yeast require oxygen to reproduce, there have been some experiments at New
      > Belgium brewery around providing the oxygen in the form of olive oil. zBob
      > is correct in needing to oxygenate your wash to allow for the yeast
      > growth. After the growth phase comes the metabolization of alcohol.
      > Once the sugars are converted, the yeast will go dormant or die off and
      > create additional flavors/phenols in your batch
      > Your turbo yeast should contain all the nutrients for the yeast that's what
      > makes it turbo, but with that comes more off flavors
      > Cheers
      > On Jan 3, 2013 3:56 PM, "Alex Netherton" <blueridgediscovery@...>
      > wrote:
      >> **
      >> I think you will find that yeast is pretty much anaerobic. As soon is it
      >> begins to produce carbon dioxide, respiration is anaerobic anyway.
      >> Chris Riddiford ** wrote:
      >> Wow fair enough, that would explain it then, thanks for the help maybe
      >> ill
      >> keep it more simple and fine an easy spirts recipe to follow
      >> On Jan 2, 2013 3:54 PM, "tgfoitwoods" zymurgybob@...> wrote:
      >>> **
      >>> Chris,
      >>> Two things strike me about your fermentation. First, when you boil the
      >>> water, you drive out all the oxygen that the yeast needs to multiply,
      >>> making the yeast's job very hard. You need to aerate/oxygenate the water
      >>> before you pitch the yeast. This can be done by agitating the liquid with
      >>> a
      >>> whisk or a drywall mud stirrer (depending on the amount of wash you
      >>> have)
      >>> or by using an aquarium airstone to bubble air or O2 through the wash.
      >>> Second, I hear no mention of yeast nutrients in your wash. Yeast does
      >>> not
      >>> live by sugar alone. Your local homebrew supply should have a
      >>> couple-three
      >>> kinds of yeast nutrient, or you can use DAP (di-ammonium phosphate) or
      >>> Miracle-Gro or compound your own.
      >>> Zymurgy Bob, a simple potstiller *Making Fine
      >>> Spirits*<http://www.kelleybarts.com/zymurgy-bob-books/making-fine-spirits/>
      >>> --- In new_distillers@yahoogroups.com, Chris Riddiford ** wrote:
      >>> >
      >>> > Okay fair enough but this raises a rather annoying question. For the
      >>> second
      >>> > time in a row my fermeting process hasn't really happened, I've
      >>> > chucked
      >>> in
      >>> > my dextros and carbon packs to boilling water then waitted till the
      >>> > temp
      >>> > was 21-24 degress before adding my turbo yeast.
      >>> >
      >>> > It just seems to foam up and nothing else.
      >>> ----snip----
      >>> **

      Er. Prashant Jha
      Asst. Engineer
      Sri Renuka Sugars Limited
    • Show all 13 messages in this topic