Comparative analysis between bioslurry and pig manure quality in two agroecosystems of Valle del Cauca (Colombia)

Abstract

The bioslurry or effluent, as a result of the anaerobic digestion in biodigesters, is a fertilizer
that can replace the pig manure, mitigating environmental risks. With the purpose of studying
the influencing factors on the concentration of nutrients of the biol, it was made a comparison
between the boil and the pig manure, in two agroecosystems of Valle del Cauca: The Agroecological
Farm El Mirador (AFM) and the agricultural Laboratory Mario González Aranda
(LMGA). It was characterized the biodigestor management, the fertilizer and environmental
quality of the biol. The results were analyzed with farmers close to AFM. It was observed a
55% decrease on the water demand in the swine housing washing procedure, which led to obtain
more concentrated biol; There was a 92% removal of COD and BOD, compared to 79% of
LGMA. Also, a remarkable cost reduction in the coffee (Coffea arabica) fertilization compared
to industrial petrochemical fertilization was evidenced.