You can run up to 3 cycles without emptying your bucket!
In fact, adding dirt (processed waste) from one cycle to another will improve the quality of your next cycle's end product, as all those amazing microbes help with the next round of degradation.
Make sure to add more fresh food waste, then simply start the next cycle. Be sure to empty Lomi after 3 cycles, as too much dirt can put strain on the grinder.