Why heat and mix a digester, and how is it done?
sourced
Heating holds the mesophilic window near 35-40 degrees C, usually with external heat exchangers or in-tank coils fed by a boiler burning a slice of the biogas - a heat demand on the order of 0.3 kWh per cubic metre of biogas. Mixing keeps microbes in contact with feed and prevents scum, settling and dead zones. Both draw parasitic energy.
- Source
- ScienceDirect water-scrubbing process study; 99pt5
- sourced
- Traceable to a named source.
- Level
- Practitioner — Operating numbers, ranges and failure modes.
Where this shows up while you build
This answer is attached to the controls it explains, so it appears beside them in the builder rather than only here.
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