Homemade EM-1

So, I've been looking into Bokashi, and noticed the adding of EM-1 as the main part of the process.
I wondered if EM-1 can be made at home.
What bacteria does EM-1 consist of?
Apparently-
Lactobacillus plantarum, casei, fermentus & bulgaricus. (Lactic Acid Bacteria (LAB))
Saccharomyces cerevisae (Yeast)
Rhodopseudomonas palustris (Photosynthetic) (Purple Non sulphur bacterium)

SO how do we capture all of these to make EM-1?

Lactobacillus can be made through the rice water rinse/fermenting method with milk. But also through any lacto-ferment such as sauerkraut/kimchi etc.
Saccharomyces cerevisae - brewers yeast
Rhodopseudomonas palustris - the tricky one, or so I thought. Sources are stated as pig manure, worm castings, pond water & marine coastal water.  

Can you use the rice water rinse ferment/ sauerkraut juice with worm castings from your vermicompost, paired with brewers yeast... or if you use spent beer grain as a substrate, could that be your source, or would there not be enough yeast remaining to be useful?
And in what ratios?
Can you make a liquid mix that you spray into your bokashi system?
Or would you mix all of the above onto a substrate- eg spent beer grain or other grains and substrates that are recommended?

First time poster! What a great community! Hope this is well received and engaged with

Thanks,
Steph

Steph,

This thread might help you or others figure out how to make a homemade EM-1:

https://permies.com/t/78784/Bokashi-Composting

Some excerpts:

Lauren said, "bokashi is basically lacto-fermentation. Since I'm on a 0 budget I decided to experiment with it using the lacto-fermentation process rather than buying expensive additives and whatnot. So I use old dry milk and layer it with the stuff in the bucket.

Bryant said, "Lacto bacillus is so easy to acquire (it is in everything dairy) that the only reason to make a purchase is probably lack of knowledge or expediency.

Patrick said, "
I've yet to find out why someone would buy EM instead of just using extra sauerkraut juices. If you make sure the waste is under water (and has some raw, lacto covered produce), I dont even think you need a starter.

Susan said, "I've made bokashi bran with LAB (lacto-bacillus serum) and spent brewer's grain. You can replace the LAB with whey, yoghurt drippings, sauerkraut juice or sourdough

Tereza said, " I make the "serum" using rice wash water and then milk.
I mix that into bran, usually I can only get wheat bran (and it's pricey), so I will usually do 2 or 3 kg of bran with the liter or two of liquid that I have. I mix these together and leave it in a small plastic barrel with a lid, I top it with a plastic bag to keep it moist (don't confuse it with the barrel of miso! It's the grayish barrel with what looks like coffee grounds in the bottom). This is the "concentrate", and I use it to mix up the actual sprinkle. Using the concentrate, I can often go a year without mixing up the serum again.

Please understand that these are just some excerpts so please read the whole thread and then there might be enough to help you accomplish your goal.