Could EM-1/bokashi bran be added to large municipal containers (e.g. skips) to mitigate odor, pests, and disease transmission?

Yes, effective microorganisms and bokashi bran can be added to mitigate all of those things.

EM prevents the rotting of organic waste and therefore eliminates unpleasant odors or the formation of harmful substances. Effective microorganisms are also useful in combating pests - they improve the plant's overall health and thus its natural defense against them.

In some cases, EM could be less effective than some plant protection products, especially if you are dealing with some suborn pests.
However, they are excellent health and environment-friendly alternative.