Hey there mrgrackle. I know that BSF show up in compost piles all the time so it shouldn't be a problem combining the two techniques. I imagine that the larvae will be fine as long as they can find food in a place that isn't too hot. My guess, however, is that the heat from the composting action will drive some of the larvae away from your pile. That isn't a problem unless you want a larger BSF colony.
I'm not very familiar with the BSFL "juice" or "tea". My colony never produced much of it if I recall correctly. My guess is that dry food scraps result in less liquid as a byproduct. Much of last year I experimented with feeding my BSF a grain diet which probably reduced the production of the juice. I would love to hear about your test results with it.
