• Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com private forums all forums
this forum made possible by our volunteer staff, including ...
master stewards:
  • Anne Miller
  • Pearl Sutton
  • r ranson
  • Nicole Alderman
  • Mike Haasl
stewards:
  • paul wheaton
  • Joseph Lofthouse
  • James Freyr
master gardeners:
  • Carla Burke
  • John F Dean
  • jordan barton
gardeners:
  • Jay Angler
  • Greg Martin
  • Leigh Tate

Regulating temperatures with no electricity

 
Posts: 3
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I'm wondering if anyone knows, or has resources to information on regulating ferment temperatures without electricity.

Specifically I am currently trying to grow koji. Ideally I must maintain a temperature of 98F. I know I could put a pot of water on low heat with the ferment suspended inside, but am looking for an alternative. If anyone can help, thank you!

Jesse
 
pollinator
Posts: 1604
Location: northern California
217
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I've faced a similar conundrum trying to make tempeh on my formerly off-grid homestead. The idea that worked best was to put the pot of hot water inside of a cooler, with the tempeh on a rack above the pot. The degree to which the lid of the cooler was open regulated the temperature into the critical zone between 80-90 F for tempeh. It would start out wide open when the water in the pot was very hot, and then work it's way to completely closed. After the first twelve hours or so the tempeh would produce enough of it's own heat that keeping it under a towel would let it continue fermenting even with the cabin in the 60's.
 
gardener
Posts: 3139
298
forest garden fungi trees books food preservation bike
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
A lot of old time miners used to sleep with their sourdough to keep it warm so they could then make bread out of it in the morning.
John S
PDX OR
 
pollinator
Posts: 1981
Location: La Palma (Canary island) Zone 11
purity forest garden tiny house wofati bike solar
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Some sort of well insulated norwegian hoven?

I also have to solve this problem....
Nice idea John, be what's about sleeping with saurkraut hehe!!!

I was thinking about some coupling with the rocket stove, as it maintains temp a long time.
 
master steward & author
Posts: 21560
Location: Left Coast Canada
6172
books chicken cooking fiber arts sheep writing
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
I know it's an old thread, however, here's an excellent resource for making koji without electric aids. Between the book of miso and the instructions from GEM Cultures, there are lots of ideas on how to grow koji with or without fancy incubators.

For my koji making, I keep it in the oven, sometimes with the light on, but usually the koji makes enough of it's own heat once it gets going. For the start, I'll heat up something ceramic or cast iron to keep the temp in the oven warm. Something that holds its heat well.

edit to add: the temperature range for koji is actually very forgiving. I usually keep between 85 and 95F with a goal of 91, for most of the koji growing process. Remembering that in the past, koji spores were often grown without fancy gadgetry like thermometers. Of course, there are ideal temperatures depending on what you want the end result to be - miso, sake, amazuke, &c. and what grains you are using, and which koji spores you are using, and what stage of the process you're at, and...

It's a bit late, but how did your koji turn out?
 
Paper jam tastes about as you would expect. Try some on this tiny ad:
Rocket Mass Heater Plans - now free for a while
https://permies.com/goodies/7/rmhplans
reply
    Bookmark Topic Watch Topic
  • New Topic