How is Kombucha Brewed?
Kombucha is made from a base brew of tea, water, sugar and a SCOBY (Symbiotic Colony of Bacteria and Yeast), which contains yeast that anaerobically consumes sugar to produce alcohol, and acid-loving bacteria that aerobically consumes alcohol to produce glucuronic, gluconic and acetic acids.
The bacteria also produce a cellulose biofilm called a pellicle or ‘tea mushroom’ that restricts air to the yeast. This keeps the yeast metabolising anaerobically, while allowing the bacteria to float on top and maintain aerobic metabolism with access to air.
Kombucha is a unique phenomenon in the drinks industry, because you can make it yourself, and essentially brew your own fermented, naturally carbonated, slightly alcoholic beverages at home, simply by obtaining a SCOBY and feeding it sweet tea.
A primary ferment can be further modified, with a secondary fermentation process that includes medicinal fruits, flowers, leaves, roots and fungi to produce medicinal tonics with a multitude of flavours and desirable biological properties.
Perhaps the best thing about kombucha is that it is alive and generative so you can keep nurturing a kombucha SCOBY, and giving it away … and infect your friends and family with good health without ever depleting your own supply.