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Moran-Salazar R.G.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej | Marino-Marmolejo E.N.,Biotecnologia Medica y Farmaceutica | Rodriguez-Campos J.,Servicios Analiticos y Metrologicos | Davila-Vazquez G.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej | Contreras-Ramos S.M.,Research Center istencia En Tecnologia seno Del Estado Of Jalisco Ac Ciatej
Environmental Technology (United Kingdom) | Year: 2016

Agave tequilana Weber is used in tequila and fructans production, with agave bagasse generated as a solid waste. The main use of bagasse is to produce compost in tequila factories with a long traditional composting that lasts 6-8 months. The aim of this study was to evaluate the degradation of agave bagasse by combining a pretreatment with fungi and vermicomposting. Experiments were carried out with fractionated or whole bagasse, sterilized or not, subjecting it to a pretreatment with Bjerkandera adusta alone or combined with native fungi, or only with native bagasse fungi (non-sterilized), for 45 days. This was followed by a vermicomposting with Eisenia fetida and sewage sludge, for another 45 days. Physicochemical parameters, lignocellulose degradation, stability and maturity changes were measured. The results indicated that up to 90% of the residual sugars in bagasse were eliminated after 30 days in all treatments. The highest degradation rate in pretreatment was observed in non-sterilized, fractionated bagasse with native fungi plus B. adusta (BNFns) (71% hemicellulose, 43% cellulose and 71% lignin) at 45 days. The highest total degradation rates after vermicomposting were in fractionated bagasse pre-treated with native fungi (94% hemicellulose, 86% cellulose and 91% lignin). However, the treatment BNFns showed better maturity and stability parameters compared to that reported for traditional composts. Thus, it seems that a process involving vermicomposting and pretreatment with B. adusta could reduce the degradation time of bagasse to 3 months, compared to the traditional composting process, which requires from 6 to 8 months. © 2015 Taylor & Francis. Source

Hernandez-Castellanos B.,University of Xalapas | Ortiz-Ceballos A.,University of Xalapas | Martinez-Hernandez S.,University of Xalapas | Noa-Carrazana J.C.,University of Xalapas | And 3 more authors.
Applied Soil Ecology | Year: 2013

The endogeic earthworm Pontoscolex corethrurus (Müller, 1857) was the most abundant species (75%) in soil contaminated with hydrocarbons, mostly benzo(a)pyrene (BaP), in the state of Tabasco (Mexico). The earthworm P. corethrurus was tested for its capacity to remove 100mgBaPkg-1 from an Anthrosol soil (sterilized or not) and amended with legume Mucuna pruriens (L.) DC. var. utilis (Wall. ex Wight) Baker ex Burck (3%) or the grass Brachiaria humidicola (L.) DC (3%) (recently renamed as Urochloa humidicola (Rendle) Morrone & Zuloaga) in an aerobic incubation experiment. P. corethrurus removed 26.6mgBaPkg-1 from the sterilized soil and application of B. humidicola as feed increased this to 35.7mgBaPkg-1 and M. pruriens to 34.2mgBaPkg-1 after 112 days. The autochthonous microorganisms removed 9.1mgBaPkg-1 from the unsterilized soil and application of B. humidicola increased this to 18.0mgBaPkg-1 and M. pruriens to 11.2mgBaPkg-1. Adding P. corethrurus to the unsterilized soil accelerated the removal of BaP and 36.1mgkg-1 was dissipated from soil. It was found that the autochthonous microorganisms removed BaP from soil, but addition of P. corethrurus increased the dissipation 4-fold. The endogeic earthworm P. corethrurus can thus be used to remediate hydrocarbon-contaminated soils in tropical regions. © 2013 Elsevier B.V. Source

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