Methane Production Vs. C.O.D

Digester design and construction info

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fchartier
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Methane Production Vs. C.O.D

Postby fchartier » Fri Jun 01, 2007 11:34 am

Hi all,

Does anyone know of studies / papers etc on methane production vs Chemical Oxygen Demand C.O.D of waste water.
Also Time production curves.

Cheers & Thanks

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Bob
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Postby Bob » Fri Jun 01, 2007 3:54 pm

There are many studies on anaerobic digestion of sludge from wastewater treatment processes, but I would think that raw wastewater would be far too dilute to be worth trying to digest anaerobically.

kjankows
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methane:COD

Postby kjankows » Mon Jan 28, 2008 10:24 pm

fchartier,

If you are just looking for a general answer, 5.607 cuft methane/lb COD consumed @ 35 deg C. Adjust for temperature (273.15 + T1)/(273.15 + 35) and and %methane and that is "generally" what you'll produce. But, Bob is correct anaerobic digestion is heavily dependent on the amount of COD and type of substrate being fed, and there are tons of studies out there.

As far as time production curves, I doubt microbes work harder in the morning compared to night, as long as they are happy they are going to produce at a constant rate. :)

hope this helps a tid bit.

kjankows

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Bob
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Postby Bob » Tue Jan 29, 2008 10:25 am

Thanks, kjankows. Good info.

(I think the time production curve question refers to reaction velocity -- a function of population, useful in batch studies.)


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