Old post, but one word, interesting, As a former government waste water treatment plant employee, using human waste is totally possible, and safe if done correctly. First off. You need to compost it with air AND without. You can do this by putting it in a bucket with water and urin and bubble it for a week of so, then you let it sit for a two weeks without bubble, VENTED! and keep away, you will have hydrogen sulfide gasses building, keep away from flame! then dilute 10:1 and bubble with some AACT stuff. black gold my friend.