Contrast between a mathematical model and the bioreduction process of Cr(VI) by consortia of bacteria isolated from wastewater of the Pasto River.

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Bibliographic Details
Title:	Contrast between a mathematical model and the bioreduction process of Cr(VI) by consortia of bacteria isolated from wastewater of the Pasto River.
Alternate Title:	Contraste entre un modelo matemático y el proceso de biorreducción de Cr(VI) por consorcios de bacterias aisladas de agua residual del Rio Pasto.
Authors:	Pinta-Melo, Jhonatan¹ jpinta@udenar.edu.co, Lorena Guerrero-Ceballos, Deisy¹, Cerón Gómez, Miller², Ibargüen Mondragón, Eduardo², Fernández-Izquierdo, Pablo¹, Burbano-Rosero, Edith Mariela¹
Source:	NOVA: Publicación Científica en Ciencias Biomédicas. ene-jun2023, Vol. 21 Issue 40, p141-164. 24p.
Subjects:	HEXAVALENT chromium toxicology, SEWAGE, MATHEMATICAL models, PROCESS capability, HEXAVALENT chromium, INDUSTRIAL wastes, MICROBIAL metabolism, BIOREMEDIATION, HEAVY metals
Abstract (English):	Introduction. The versatile metabolism of microorganisms allows biodegradation of a wide variety of contaminants; however, the increasing scale of the industry exceeds its po- llutant processing capacity. Due to its high toxicity, hexavalent chromium Cr(VI) is one of the heavy metals with the greatest global dissemination and concern. There are numerous investigations focused on proposing treatments to purify the different ecosystems affected with this metal; however, knowledge about various microorganisms from the same source that could help solve this problem is restricted. Objective. To evaluate the efficiency in the reduction of Cr(VI) of bacterial consortia (B. thuringiensis, B. amyloliquefaciens and Paenibacillus sp.) in a Batch type treatment, using municipal wastewater from Río Pasto as a substrate. Methodology. A mathematical model was formulated that reliably predicted the behavior of the consortia, in relation to their growth and reduction percentage, the results of the simulations were compared with experimental data to select the consortium with the best Cr(VI) reduction results). Subsequently, its efficiency in the reduction of Cr(VI) was determined, using unsterilized residual river water as a substrate. Results. The statistical analyzes highlighted the absence of statistically significant differences in the reduction percentages between the consortia. However, with the selected culture, a reduc- tion percentage of 91% was presented in 156 hours. Conclusion. The results found in this research are promising for their application in the improvement of treatment practices for Cr(VI) bioremediation. [ABSTRACT FROM AUTHOR]
Abstract (Spanish):	Introducción. El metabolismo versátil de los microorganismos permite la biodegradación de una amplia variedad de contaminantes, sin embargo, la creciente ampliación de la industria supera su capacidad de procesamiento de poluentes. El cromo hexavalente Cr(VI) debido a su alta toxicidad es uno de los metales pesados de mayor difusión y preocupación a nivel global. Existen numerosas investigaciones enfocadas en proponer tratamientos para depurar los diferentes ecosistemas afectados con este metal; no obstante, el conocimiento sobre diversos microorganismos de una misma fuente que podrían ayudar a solucionar esta problemática se ve restringido. Objetivo. Evaluar la eficiencia en la reducción de Cr(VI) de consorcios bacterianos (B. thuringiensis, B. amyloliquefaciens y Paenibacillus sp.) en un tratamiento tipo Batch, utilizando como sustrato agua residual municipal del Río Pasto. Metodología. Se formuló un modelo matemático que predijo de manera confiable el comportamiento de los consorcios, con relación a su crecimiento y el porcentaje de reducción, los resultados de las simulaciones fueron comparados con datos experimentales para seleccionar el consorcio con mejores resultados de reducción de Cr(VI). Posteriormente, se determinó su eficiencia en la reducción de Cr(VI), usando como sustrato agua residual del rio sin esterilizar. Resultados. Los análisis estadísticos resaltaron la ausencia de diferencias estadísticamente significativas en los porcentajes de reducción entre los consorcios. No obstante, con el cultivo seleccionado se presentó un porcentaje de reducción de 91% en 156 horas. Conclusión. Los resultados encontrados en esta investigación son promisorios para su aplicación en el mejoramiento de las prácticas de tratamiento para la biorremediación de Cr(VI). [ABSTRACT FROM AUTHOR]
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Database:	MedicLatina

Description
Abstract:	Introduction. The versatile metabolism of microorganisms allows biodegradation of a wide variety of contaminants; however, the increasing scale of the industry exceeds its po- llutant processing capacity. Due to its high toxicity, hexavalent chromium Cr(VI) is one of the heavy metals with the greatest global dissemination and concern. There are numerous investigations focused on proposing treatments to purify the different ecosystems affected with this metal; however, knowledge about various microorganisms from the same source that could help solve this problem is restricted. Objective. To evaluate the efficiency in the reduction of Cr(VI) of bacterial consortia (B. thuringiensis, B. amyloliquefaciens and Paenibacillus sp.) in a Batch type treatment, using municipal wastewater from Río Pasto as a substrate. Methodology. A mathematical model was formulated that reliably predicted the behavior of the consortia, in relation to their growth and reduction percentage, the results of the simulations were compared with experimental data to select the consortium with the best Cr(VI) reduction results). Subsequently, its efficiency in the reduction of Cr(VI) was determined, using unsterilized residual river water as a substrate. Results. The statistical analyzes highlighted the absence of statistically significant differences in the reduction percentages between the consortia. However, with the selected culture, a reduc- tion percentage of 91% was presented in 156 hours. Conclusion. The results found in this research are promising for their application in the improvement of treatment practices for Cr(VI) bioremediation. [ABSTRACT FROM AUTHOR]
ISSN:	17942470
DOI:	10.22490/24629448.6921