In México, there are extensive areas polluted by oil spills. Currently, bioremediation technologies have been developed, using microorganisms to clean up oil sites. In this study, we evaluated the development of a hydrocarbonoclastic bacterial strain, using a completely randomized 3x3x4 factor arrangement: three temperatures, three pH, and four nutrients. We collected samples of soil contaminated with 3.45 x 10 5 mg kg -1
ResumenEl vermicompostaje es un proceso ecotecnológico de bajo costo que permite la bio-oxidación, degradación y estabilización de residuos orgánicos por la acción conjunta de lombrices y microorganismos, del cual se obtiene la vermicomposta, un producto final estabilizado, homogéneo y de granulometría fina. Este proceso tecnológico eficiente puede convertir residuos orgánicos en productos de valor agregado para las prácticas de restauración ecológica y programas de fertilidad del suelo. El objetivo de esta revisión, es presentar los avances reportados en la literatura científica acerca del proceso de vermicompostaje, con la finalidad de comprender las cualidades y virtudes de esta tecnología alternativa en la conversión de residuos orgánicos sólidos en productos estables. En este documento se hace una breve revisión sobre bases que dieron paso al uso de lombrices en la fertilización del suelo, desde civilizaciones antiguas hasta la implementación de invernaderos de alta tecnología, tanto así que el vermicompostaje está llamado a hacer la segunda revolución verde para la generación de fertilizante orgánico y producción de alimentos sanos, e incluso para la generación de proteína de alta calidad para alimento animal. Se describen características de algunas especies de lombrices adecuadas para su manejo, así como la función que desempeñan en AbstractThe vermicomposting is a low cost eco-technological process that allows the bio-oxidation, degradation and stabilization of organic residues by the joint action of worms and microorganisms, from which the vermicompost is obtained, a final product stabilized, homogenous and fine granulometry. This efficient technological process can convert organic waste into value-added products for ecological restoration practices and soil fertility programs. The objective of this review is to present the advances reported in the scientific literature about the vermicomposting process, in order to understand the qualities and virtues of this alternative technology in the conversion of solid organic residues to stable products. In this document a brief review is made on bases that gave way to the use of earthworms in soil fertilization, from ancient civilizations to the implementation of high tech greenhouses at present, so much so that the vermicomposting is called to make the second green revolution for the generation of organic fertilizer and production of healthy food, and even for the generation of high quality protein for animal feed. Outstanding characteristics are described of some earthworm species that make them suitable for their management, as well as their role in the recycling of organic matter. A review 394 Rev. Mex. Cienc. Agríc. Vol.8 Núm. 2 15 de febrero -31 de marzo, 2017Víctor Manuel Villegas-Cornelio y José Ramón Laines Canepa reciclaje de la materia orgánica. Se hace una revisión de residuos orgánicos convencionales utilizados como alimento para lombrices, que al ser estabilizados mejoran el suelo y promueven la producción de los cultivos.Palabras clave: bio-oxida...
ResumenEl vermicompostaje es un proceso biotecnológico que permite biodegradar residuos orgánicos bajo condiciones aerobias y mesófilas por la acción conjunta de lombrices y microorganismos, del cual se obtiene un producto final estabilizado. En el proceso se aprovechan las capacidades detritívoras de las lombrices, la acción de sus enzimas digestivas y de la microflora aeróbica y anaeróbica presentes en su intestino. El objetivo de esta revisión es dar a conocer avances reportados en la literatura científica acerca de los diferentes eventos en el proceso de vermicompostaje. El uso de residuos orgánicos no convencionales para producir vermicomposta, es una forma de reciclar materia orgánica que de otra manera son desechados de forma inapropiada causando problemas ambientales y pérdida de material orgánico valioso. Su uso como bioplaguicida plantea buena expectativa para el control de patógenos en los cultivos, limitando del empleo de pesticidas químicos. Se hace una revisión de la actividad enzimática en el vermicompostaje, responsable de muchas transformaciones bioquímicas en el sustrato. Un aspecto importante del proceso es el funcionamiento y la biodiversidad de las poblaciones microbianas que participan en la transformación de los residuos, del que se sabe muy poco. El manejo de esta AbstractThe vermicomposting is a biotechnological process that allows biodegradation of organic waste under aerobic and mesophilic conditions by the joint action of worms and microorganisms, from which a stabilized final product is obtained. In the process they take advantage of the destructive capacities of the worms, the action of the digestive enzymes and the aerobic and anaerobic microflora present in their intestines. The objective of this review is to present advances reported in the scientific literature about the different events in the vermicomposting process. The use of unconventional organic waste to produce vermicompost is a way to recycle organic matter that otherwise is improperly disposed of causing environmental problems and loss of valuable organic material. Its use as a biopesticide raises good expectations for the control of pathogens in crops, limiting the use of chemical pesticides. A review of the enzymatic activity in the vermicomposting, responsible for many biochemical transformations in the substrate. An important aspect of the process is the functioning and biodiversity of microbial populations involved in the transformation of waste, which is very little known. The management of this technology requires the 408 Rev. Mex. Cienc. Agríc. Vol.8 Núm. 2 15 de febrero -31 de marzo, 2017Víctor Manuel Villegas-Cornelio y José Ramón Laines Canepa tecnología requiere del entendimiento de los mecanismos complejos en la relación lombriz-microorganismos, que interactúan para aumentar las tasas de descomposición de la materia orgánica.Palabras clave: bioplaguicida, enzimas, lombrices de tierra, microorganismos, vermicompostaje. IntroducciónActividades productivas como las agrícolas, urbanas e industriales generan re...
Objective: To evaluate the CaO made from oyster shell (C. virginica) as a heterogeneous catalyst in the transesterification of edible vegetable oil used for the production of biodiesel. Design / methodology / approach: A completely randomized experimental design was used, which grouped 3 treatments with 3 repetitions, generating a total of 9 experimental units. The response variable was the performance of the transesterification reaction that was evaluated with 2%, 3% and 4% of CaO obtained from oyster shells. The density, kinematic viscosity, acidity, and conversion efficiency to methyl esters were determined by 1H NMR of the products of each treatment. Results: The treatment with 3% catalyst showed the highest reaction yield (92.2%) compared to the treatments with 2% (86.8%) and 4% catalyst (87.13%). The 1H NMR spectra confirmed the presence of methyl esters in the product of the three treatments. The treatment with 3% and 4% by weight of catalyst presented products with similar characteristics with acceptable values of density, viscosity and acid number in accordance with the ASTM D6751 and EN1421 standards. Study limitations / implications: A concentration of 2% by weight of CaO generates a conversion percentage far from the content of methyl esters established by the ASTM D6751 and EN14214 Standards (> 96.5%). Findings / conclusions: 1H NMR results indicate that the conversion efficiency to methyl esters is positively affected by the amount of catalyst. In the treatments with catalyst loading greater than 2%, the conversion to methyl esters increased significantly to values around 90%.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.