Hello this is a very good question that deserves reflection. there is a difference and it is huge because sanitation and hygiene are two distinct vectors. Except that sanitation means fecal matter and that it is considered an impurity, a stain, a dirt, we can think that it is the cause of all our ills, in addition to its unpleasant olfactory emissions . For proof the managers of the sanitation are unable to find an effective solution to the elimination of the fecal matter. In our environment, all excrement eventually disappear, the dung dung, everything that comes from the digestive system, mother nature, eliminates them. The man can not definitively eliminate the fecal matter and by obligation, produces more than 45 Million tons of excrement mud. Yet sanitation biotechnology manages to eliminate them entirely, without any production of sludge residue or odor. In reality, sanitation as it is designed transforms feces into putrid mud, a poison for humans and their environment. it took only one step to make the connection between fecal matter and hygiene where there is really no relation. hygiene of life, food hygiene, are human concepts.