I get BSF turning up in my basic humanure 5-gallon-bucket toilet, whether i want them or not. Although of course I do want them.
In an easy world, when the poo bucket is sufficiently heaving with soldierfly, I would just empty the whole thing into the chicken pen and start filling it again. I assume this would introduce pathogens into the chickens, whom I eat (eggs and meat).
What if I collect them as they leave the humanure bucket? This is a little awkward as the bucket is nicely plumbed in now, but could be done.
Basically, what is the least I can get away with to ensure that these wonderful poo-fueled soldierfly larvae can be put to good use and turned into eggs/chicken meat for us to consume.
*There are different people contributing to the humanure bucket all the time as people stay for a few weeks and move on.