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Methane Production Vs. C.O.D

Posted: Fri Jun 01, 2007 11:34 am
by fchartier
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

Posted: Fri Jun 01, 2007 3:54 pm
by Bob
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.


Posted: Mon Jan 28, 2008 10:24 pm
by kjankows

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.


Posted: Tue Jan 29, 2008 10:25 am
by Bob
Thanks, kjankows. Good info.

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