coffee enema question

Hi,

Have been doing coffee enemas and am trying to figure out what I am seeing in the colander! I am doing two enemas with 2 cups in each and holding for 15 mins. The fist one (after doing a warm water enema) not much comes out except the coffee but after holding the 2nd one I expell 1-2 cups worth of putrid 'stuff' no stones. I want to know where is this stuff coming from!? If it coming from my gallbladder and what is it? I thought it was just bile (and maybe stones) in the gallblader. This stuff looks like poop but it's not, if you know what I mean.

Many thanks