The solutions for the removal of the manure from the pigs’ shelters can be substantially referable to:

Continuous overflowing.
The more solid part of the dung that floats because of the anaerobic fermentation gases, runs over the liquid layer below until it overlfows.

Recycling.
Recycling by pumping the suitably treated sewage into a ditch under the split floor.

Cyclic drainage.
It consists in collecting the liquid manure into the pits for a while and in removing it periodically, as soon as the quantity is enough to assure the removal of the whole mass. This is important so as to avoid that the bottom of pit is cluttered with too many residues whose removal could require a direct intervention.

Mechanical removal by scraper.
The installation of a mechanical scraper on the bottom of the pit assures the removal of the ‘fresh’ dung. This can be interesting in case of next energy recovery treatments and for a reduced development of noxious gas for the environment.