Instead of using expensive bran I ferment newspaper to use between the layers of compost in the bucket.

I take one part lactobacillus serum to one part molasses to six parts water. (label and freeze any extra serum)

I soak a  bunch of newspapers thoroughly in the mixture and drain well.

I place the soaked newspapers in a 2 gallon zip lock baggie, remove all the air and seal.

Place in a cool dark spot and wait 10 days to 2 weeks to get a good fermentation.

After the fermentation process I separate and dry the newspaper. It’s now the carrier for the bacteria.

<<<Coming Soon: Setting up an inexpensive newspaper bokashi bucket.>>>>

Put the finished rice water solution in a bigger container and add 10 parts milk (I use skim). DO NOT seal tightly, the gases must be able to escape.
Allow 14 days for a complete ferment, most of the solids in the milk will float to the top revealing the yellowish serum.
Strain off the solids.

You now have purified lactobacillus serum.

Making your own bokashi starter culture in place of commercially available EM is incredibly easy.

My goal from the start was to produce bokashi compost without the use of expensive EM, bran or fancy buckets.

The most important component of the commercial EM in relation to bokashi is lactobacillus bacteria, the others are secondary (if at all necessary) and can be cultured in the bucket when conditions are favorable.

I culture my own lactobacillus serum starting with a rice wash water solution.

Making the serum is amazingly simple.

I mix one part rice thoroughly with two parts water (1/2 a cup to one cup). Mix thoroughly and vigorously. Drain. The resulting water should be cloudy.

Place the rice water in a container with 50-75% head space allowing plenty of air to circulate. Cover lightly (air should be able to move in and out of the container) and place in a cool dark spot for 5-8 days.

At the end of the wait the mixture should smell mildly sour.
Strain out any particles.