After trying and failing batch domestic anaerobic digestion in Kathmandu at its coldest (December, January), a biogas expert observed our system and explained the bacteria could not operate because of temperature fluctuations--which would throw the anaerobic bacteria back into stasis every evening when the temperature would drop.
A rumor reached us about an anaerobic bacteria (used in China?) which is cold resistant.
Inoculating a bio-digester with a different bacteria is more appealing than re-designing a complete system with insulation.
Unfortunately we have had no details regarding this bacteria. Would you have more information about any cold-resistant anaerobic bacteria? Which one is it exactly? How can it be found, grown and used?