Who has used threonine bacterial protein? May I ask you some questions?

Just entered a truckload of bacteria, the internal color is different, all colors, and there are a lot of particles like soil. I feel that this thing is not adulterated or not adulterated, because the difference in color and particle size of it itself is so big that I don't know how to judge it. I hope I have used some advice from my friends. (how to control it) there are no pictures for the time being. Sometimes I make it up. This should be the bacterial waste after the production of threonine, and there are many fillers added during fermentation. At that time, one of my classmates did experiments on similar products, and the content of non-protein nitrogen was very high, especially the content of ammonia salt was very high. Ash content is not low-- has not been used, is not very clear-- the second floor is right, most of these products are relatively high in free ammonia, not easy to use too much, it is recommended to use with caution.