Resumen

CHAO ESPINOSA, amón; SOSAS CACERES, Roberto  y  DIAZ CAPDESUNER, Yasser. Water use for cleaning pens and wastewaters treatment in fattening pigs production. Rev Cie Téc Agr [online]. 2012, vol.21, n.3, pp.69-72. ISSN 2071-0054.

A study on cleaning pens system was carry out in three pig housing  from one 80 sows pig farm  of Swine Research Institute,  as well as wastewater treatment thru 90 m³ fixed dome digester. That  study was carry out during 3 months  in  conditions of production. The next measures was taken: animal number and weigh; time of cleaning floor, quantity of used water and total amount of wastewater (excreta, urine and used water  for cleaning). In each pig housing were: 91; 87 and  111 animals, their  average weigh was 52; 56 and 72 kg respectable. The time for pens cleaning was 39;45 and 55 min.  The quantity of used water was 2,28; 2,31 and 2,30 m³ and the amount of wastewater (including excreta and urine) was 2,55, 2,57 and 3,24 m³. For all theses measures was made a Varianza Test. The total amount of wastewater for the tree pig housing were 8,36 m³ and the used of water were 25,51 L per pig. The remotion of  total solids, volatils solids and chemical oxigen demand were 75;79 and 62 respectibily. These  results are inferiors than the others  obteneid in some evaluations in diferents  fixed dome digesters, There is appreciable a lot of water  used in cleanming the pens, therefor it is needed a considerable volumen wastewater system and the necessary increase of material and finance of inversion. 

Palabras clave : Water for cleaning pens; chemical oxygen demand; fixed dome digester.

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