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IDENTIFICACIÓN DE CEPAS NATIVAS CON POTENCIAL PARA OBTENCIÓN DE POLIHIDROXIALCANOATOS -(PHAs)EN LODOS ACTIVADOS

Authors: Romero Arroyave, Ana Lorena; Cardona Betancur, Mariana; Agudelo Escobar, Lina María;

IDENTIFICACIÓN DE CEPAS NATIVAS CON POTENCIAL PARA OBTENCIÓN DE POLIHIDROXIALCANOATOS -(PHAs)EN LODOS ACTIVADOS

Abstract

RESUMEN : Los Polihidroxialcanoatos son poliésteres naturales que se han convertido en una excelente alternativa para remplazar los plásticos convencionales. Son biocompatibles y biodegradables y en corto tiempo pueden ser reducidos a dióxido de carbono y agua. Son sintetizados intracelularmente por diferentes bacterias y pueden ser obtenidos a partir de una gran variedad de sustratos, en los que se incluyen algunos desechos agroindustriales. Con el objetivo de identificar cepas nativas con potencial para la producción de Polihidroxialcanoatos se llevó a cabo una bioprospección en los lodos de la Planta de Tratamiento de Aguas Residuales de San Fernando (Itagüí-Antioquia). Se aislaron en agar selectivo 19 colonias, de las cuales se seleccionaron las colonias con oxidasa positiva. Se realizó la activación y siembra de las bacterias en medio mínimo de sales (MSM) líquido, para establecer el porcentaje de acumulación de los Polihidroxialcanoatos. Las cepas LM-3D, LAR-4D, LAR-5B, LAR-5E, presentaron un porcentaje de acumulación de PHAs de 2, 10, 4, 3 %, respectivamente y la cepa LM-3F presentó un porcentaje de acumulación del 25%, con respecto a los otros aislados. Tras el análisis bioquímico se determinó que las cepas productoras de PHAs fueron Shingomonas paucemobilis, Aeromonas hydrophila y Aeromonas sobria.

RESUMO : Polihidroxialcanoatos são poliésteres naturais com excelentes características para substituir os plásticos convencionais. Eles são bio-compatíveis e biodegradáveis e num curto espaço de tempo que podem ser reduzidos a dióxido de carbono e água. Eles são sintetizados intracelular por diversas bactérias e podem ser obtidos a partir de uma grande variedade de substratos, incluindo alguns resíduos agrícolas. O objetivo principal é identificar cepas nativas com potencial para a produção de polihidroxialcanoatos. A bioprospecção foi realizada no lodo de águas residuais da fábrica de San Fernando (Itagüí-Antioquia). 19 colônias foram isoladas em ágar seletivo, e, em seguida, foram selecionadas as colônias com oxidase positiva. A ativação e cultivo foram realizados em um meio sal mínimo líquido (MSM) para estabelecer a taxa de acúmulo de biopolímeros. As cepas LM-3D, LAR-4D, LAR-5B, LAR-5E exibiu uma taxa de PHAs acúmulo de 2, 10, 4, 3%, respectivamente, ea tensão LM-3F exibiu a 25% da taxa de acúmulo de biopolímeros contra os outros. Após a análise bioquímica foi estabelecido que as cepas produtoras de polímeros foram Shingomonas paucemobilis, Aeromonas hydrophila e Aeromonas sobria.

ABSTRACT : Polyhydroxyalkanoates are natural polyesters with excellent characteristics to replace conventional plastics. They are bio-compatibles and biodegradables and in a short time they can be reduced to carbon dioxide and water. They are intracellular synthetized by different bacteria and they can be obtained from a large variety of substrates, including some agriculture wastes. The main target is to identify native strains with potential to produce polyhydroxyalkanoates. A bio-prospection was performed in the sludge of San Fernando’s waste water plant (Itagüí-Antioquia). 19 colonies were isolated in a selective agar, and then the colonies with positive oxidase were selected. The activation and cultivation were carried in a liquid minimum salt medium (MSM) to establish the biopolymer accumulation rate. The strains LM-3D, LAR-4D, LAR-5B, LAR-5E exhibited a pHAs accumulation rate of 2, 10, 4, 3% respectively, and the strain LM-3F exhibited a 25% of biopolymer accumulation rate against others. Upon the biochemical analysis it was established that polymer producer strains were Shingomonas paucemobilis, Aeromonas hydrophila and Aeromonas sobria.

COL0066991

Country
Colombia
Keywords

570, Aguas residuales, Wasted wáter, Bioprospección, Agriculture (General), Biopolímeros, Isolation, Desperdíciode água, S1-972, Aguas residuales - tratamiento por proceso de lodo activado, Biopolymers, Aguas Residuales, Waste Water, Lodos Activados, Bioprospecting, Licor mixto (LM)., Aislamiento, Sewage-Purification - Activated sludge process, Isolamento, Activated Sludges, Ativadoslugde, Licor mixto (LM), Lodo activado recirculado (LAR), Activated slugde, Mixed liquor, Licor misto, Bio-prospection, TP248.13-248.65, Bioprospecção, Biotechnology

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
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