Lactic Acid Fermentation (commonly referred to as lacto-fermentation), is an ancient method of preserving food primarily using the Lactobacillus genus of bacteria. Many different cultures have their own cultural food or drink made using lacto-fermentation; in Africa they make Koko Sour Water, in Mongolia and the Caucasus mountains they make Kefir, in Europe there is sauerkraut and pickles, and in Korea and China you find Kimchi. It uses the preservative nature of lactic acid and salt to prolong foods consumability. Many different foods can be preserved via lacto-fermentation including:
Lactic acid fermentation primarily uses the Lactobacillus genus of bacteria. Despite this, many fermentations also include other genus of bacteria and yeast including Brettanomyces, Pediococcus, and Leuconostoc.
Many methods for pickling rely on a brine (salt water) solution to inhibit initial microbial growth until Leuconostoc, Lactobacillus, Pediococcus, and other beneficial microbes can sufficiently reproduce and begin fermentation. The fermentation process of these microbes causes a lowering of the pH, due to lactic acid production, in the overall solution and further inhibits the growth of unwanted microbes. The process can take a few days to several months at room temperature (around 72°F). The finished pickles can then be stored at cellar temperature or in the refrigerator and be enjoyed for months or years longer than the original fresh produce.
...which leads us to…
TASTY PICKLED FOOD!
Yogurt and Dairy Ferments:
Yogurt, sour cream, kefir, and cheese are all fermented foods that are made from dairy, sheep, or goat milk. Yogurt relies on a rather simple process by which to make it. You first heat the milk to around 185°F which denatures the protein in the milk, preventing the milk from forming curds. The milk is then cooled to around 110-115°F at which point the bacterial cultures are added. Yogurt is a quick ferment if kept above 100°F during the entire fermentation process. The quick process results in it being finished with fermentation in around 6-12 hours. Sour cream uses almost the same process, but is instead fermented at room temperature and using heavy cream.
...which leads us to...
An appropriate vessel for making pickles is one that is:
(Wide-Mouth) Vacuum Flask:
Generic Procedures For Pickles
Step 1: Gather ingredients.
Step 2: Sanitize vessel and prepare produce.
Step 3: Close vessel and wait.
Plain Sauerkraut Recipe
There are many methods for making sauerkraut, this is just the method that I use.
Kosher salt (or sea salt, it just must not include iodine)
One head cabbage
Mason jar (1 quart size jar is good for about ½ a cabbage)
Star-san (This is preferable, if you are using Iodophor you must rinse extremely well)
Wash the head of cabbage removing several layers of outer leaves.
- Set aside one large leaf for later.
Weight the remaining cabbage in grams, note this for later.
Chop up the cabbage into smallish pieces.
Set aside 2.25-2.5% by weight of Kosher Salt.
Knead the salt into the cabbage, squeezing the cabbage and working > the salt into all of it.
Set aside for 20 minutes, covered with saran wrap.
- At this point, you should sanitize the mason jar.
Put the cabbage into the mason jar, pour the liquid over the cabbage > ensuring that the cabbage is completely covered by liquid.
Place the large cabbage leaf of the top of the cabbage, ensuring it > too is covered by the liquid.
Lightly screw the mason jar top on, set aside for as long as you > like based on taste.
- If the cabbage raises out of the liquid due to CO~2~ push it down > with a sanitized wooden spoon.
Dill Pickle Recipe
This is a standard lacto-fermented dill pickle recipe that I have modified.
5 tablespoons kosher salt (or sea salt, it must not contain iodine)
2 quarts filtered water
4-6 grape leaves (optional)
6-9 cloves garlic, peeled and whole
2 large heads of dill
A pinch of black peppercorns and red pepper flakes. (You can include mustard seeds, I however do not)
Optional: sliced carrots and other vegetables
Mix the water and salt into a brine solution.
Add a few of the leaves and some of the spices to the bottom of the > jar.
Add some of the cucumbers.
Layer more leaves and spices until the jar is full about 1-2” from > the top of the jar.
Pour the brine solution over all of the mixture leaving 1” of > headspace in the jar.
Lightly close the lid of the jar and leave for 3-5 days, or to > taste.
Further Reading and Resources
 “Lactobacillus.” Wikipedia. Wikimedia Foundation. Web. 29 Apr. 2015. <http://en.wikipedia.org/wiki/Lactobacillus>.
 Katz, Sandor Ellix, and Michael Pollan. The Art of Fermentation: An In-depth Exploration of Essential Concepts and Processes from around the World. Print.
 Tonsmeire, Michael. American Sour Beers: Innovative Techniques for Mixed Fermentations. Print.
 Garrett, R, and Charles M. Grisham. Biochemistry. Belmont, CA: Thomson Brooks/Cole, 2005. Print.
 Lei, V, and M Jakobsen. “Microbiological Characterization and Probiotic Potential of koko and koko Sour Water, African Spontaneously Fermented Millet Porridge and Drink.” Journal of Applied Microbiology. 96.2 (2004): 384-397. Print