Bokashi bran is not a once-in-a-lifetime thing. You have to add it at the beginning and after every laser of bio-waste.
While storing Bokashi bran, keep it in a dark and dry place, also, close the bag so the oxygen won't deform its quality.
Before putting the organic waste for the first time, sprinkle 20ml of bran on the bottom of the composter. Then, add 20ml of bran after each layer of organic waste. It is recommended to sprinkle 20 ml after approximately every 5 cm of organic waste.