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Anaerobic Digester Calculator
How to use: Change any of the
default values shown in blue.
Instantly see the results of your changes.
- Input quantity and type
of available animal wastes.
- Add other wastes as available,
to improve C/N ratio. (30:1 is ideal, though a lesser ratio will work.)
- Add water as required to
provide a 6% - 8% slurry.
- Enter number of digester
tanks desired. (In general, a single tank will be most cost effective,
(having less surface area to insulate and lose heat through, and requiring
less floor area and connecting piping and fittings). However, there
may be valid reasons to go with two or more smaller tanks, rather than
one large one, including redundancy (if one tank fails, the other(s)
can continue), and better use of available space.
- The warmer the ambient temperature
and/or input waste temperature (up to 95degF), the better the digester
will perform. Warmer temperatures will require less tank insulation
and less supplementary heat requied to maintain digestion process at
optimum levels. If biogas is used to heat the digester, more will be
available for other uses.
(A place to ask questions & provide feedback.)