TY - JOUR
T1 - Evaluación fitotóxica de digestatos líquidos obtenidos de co-digestión anaeróbica de residuos agropecuarios
AU - Bustos-Barrera, Edgar Esteban
AU - Solís-Oba, María Myrna
AU - Chicatto-Gasperín, Vanesa
AU - Solís-Oba, Aida
N1 - Publisher Copyright:
© 2016 Universidad Autonoma de Tlaxcala. All right reserved.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The improper disposal of organic wastes is an environmental problem. An alternative to this problems is to use the combined anaerobic digestion (co-AD), in which organic matter is degraded by microorganisms to produce biogas and digestate, which can be used as fertilizer. Digestate comprises a liquid fraction (biol) and a solid one. In this work the phytotoxicity of bioles obtained from different conditions of co-AD was evaluated. Four batch type biodigesters tratments and a control were prepared, all at 70% capacity, 10% solids dry basis, retention time of 60 days and mesophilic temperature conditions. The treatments consisted in 80% residue of vegetables and 20% pig manure, a group of digesters was adjusted to initial pH 6 and another initial pH 8, and with or without adjusting the Carbon:Nitrogen ratio to 20:1. PH was monitored during the process. Phytotoxicity test was done through germination index (GI). GI was calculated to the bioles of weeks 3, 6 and 8 of the process of co-DA. Six bioles obtained in different weeks were not phytotoxic, the bioles obtained from co-DA where the initial pH was adjusted to 8 were growth promoters in week 6; however, the control obtained higher GI than the treatments.
AB - The improper disposal of organic wastes is an environmental problem. An alternative to this problems is to use the combined anaerobic digestion (co-AD), in which organic matter is degraded by microorganisms to produce biogas and digestate, which can be used as fertilizer. Digestate comprises a liquid fraction (biol) and a solid one. In this work the phytotoxicity of bioles obtained from different conditions of co-AD was evaluated. Four batch type biodigesters tratments and a control were prepared, all at 70% capacity, 10% solids dry basis, retention time of 60 days and mesophilic temperature conditions. The treatments consisted in 80% residue of vegetables and 20% pig manure, a group of digesters was adjusted to initial pH 6 and another initial pH 8, and with or without adjusting the Carbon:Nitrogen ratio to 20:1. PH was monitored during the process. Phytotoxicity test was done through germination index (GI). GI was calculated to the bioles of weeks 3, 6 and 8 of the process of co-DA. Six bioles obtained in different weeks were not phytotoxic, the bioles obtained from co-DA where the initial pH was adjusted to 8 were growth promoters in week 6; however, the control obtained higher GI than the treatments.
KW - Agricultural residues
KW - Anaerobic co-digestion
KW - Germination index
KW - Liquid digestate
KW - Phytotoxicity
UR - http://www.scopus.com/inward/record.url?scp=85087355973&partnerID=8YFLogxK
U2 - 10.29267/mxjb.2016.1.2.1
DO - 10.29267/mxjb.2016.1.2.1
M3 - Artículo
SN - 2448-6590
VL - 1
SP - 1
EP - 7
JO - Mexican Journal of Biotechnology
JF - Mexican Journal of Biotechnology
IS - 2
ER -