Where is the dung and urine from pig farming in the fermentation bed?

Oxidation furnace effect of dynamic micro-ecological cushion fermentation bed

Many breeding enthusiasts who have not come into contact with the fermentation bed often have doubts about the whereabouts of the manure in the fermentation bed: pigs eat, drink, pull and sprinkle on it. You should know that the average fecal discharge of a pig (about 60 kilograms per pig) is at least 5 kilograms. For example, a circle of 10 pigs (12 square meters of fattening column fermentation bed), that is, 50 kilograms a day, 1500 kilograms a month, why go by for months and the whole year? The padding material in the pigsty not only did not increase, but also decreased. Where are all these droppings? In summer, 1020kg of 100x diluted health care solution is sprayed every day. In three months, more than 7800 kg of feces and urine plus health liquid dilution are discharged into the fermentation bed, and the cushion not only does not rise, but also sinks slightly; even if there is no fecal urine in the fermentation bed for one year, two years, or several years, the fermentation bed has not risen, where on earth are these dung and urine?