Olives. Trent Brick Period 4. How Are Olives Made Edible?.
When an olive is plucked from a tree, it is extremely bitter. To make the olives less bitter, they are fermented or soaked in lye. Fermentation removes the Oleuropein from the olive fruit, which causes the bitter flavour. The process of fermentation can take anywhere from 2 weeks to 1 month.
The bacteria that cause the fermentation of the olives are normally Gram-negative bacteria and yeasts. DebaryomycesHanseniiis the most significant type of bacteria in the early fermentation, appearing at about the 40th day of fermentation and disappearing at about the 75th day of fermentation for most species of olive.
After the 75th day, DebaryomycesHanseniiis no longer the predominant species of yeast. Instead, Candida Memranifaciensis the most dominant.
The fermentation that occurs in olives is usually high salt fermentation, a special type of ethanol fermentation where the salt levels are abnormally high for fermentation processes, discouraging the growth of lactic acid bacteria.
This type of ethanol fermentation begins with yeast being added to the olives in a salt-water bath, where the olives begin the fermentation process, where one would leave the olives covered and placed in a warm environment to keep the yeast happy, and wait for ~100 days. Enjoy olives after a bath in cool water.
C6H12O6 + 2 ADP + 2 Pi + 2 NAD+ →
2 CH3COCOO− + 2 ATP + 2 NADH + 2 H2O + 2H+
http://www.okyanusbilgiambari.com/Bilimsel.Makale/Okyanus-OliveFermentation.pdf - How it’s fermented [CAUTION: IN TURKISH FOR THE MOST PART, NOT WELL TRANSLATED]
http://www.fao.org/docrep/x0560e/x0560e07.htm - More information on fermentation in foods
http://en.wikipedia.org/wiki/Olive#Traditional_fermentation_and_curing – Provided helpful cite notes where many of the other sources came from
Http://www.wallpaperslibrary.com/ - Provided beautiful, albeit slightly difficult to type on, olive background
http://www.yourdiscovery.com/video/dirty-jobs-plucking-olives/ - Dirty jobs video
…For actually listening to my ramblings on olives. Have a nice day! Here’s a dirty jobs episode!
Click here for a short (3:53) video