Modeling of microbial growth and ammonia consumption at differenttemperatures in the production of a polyhydroxyalkanoate (PHA) biopolymer

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Carlos Ocampo-López
Santiago Colorado-Arias
Margarita Ramírez-Carmona

Abstract

2015AbstractModeling of microbial growth and ammonia consumption at different temperatures was developed in the production of a polyhydroxyalkanoate(PHA) biopolymer in Pseudomona fluorescens in the range of 25–35◦C. A logistic model was employed to predict accurately the microbial growthlimiting conditions of nitrogen. A new model based in a mixed mathematical equation comprising a logistic model, and a magnetic saturation modelresulted appropriate to estimate the ammonia consumption under limiting conditions. Favorable conditions for PHA production in P. fluorescenswere found at temperature of 30◦C, reaching the maximum biomass concentration of 2.83 g L−1, and consuming 99.9% of the initial ammonia, toproduce 2.13 g L−1of PHA. The proposed models could be useful to predict the behavior of a fermentation process to produce PHA in real time.All Rights Reserved © 2015 Universidad Nacional Autónoma de México, Centro de Ciencias Aplicadas y Desarrollo Tecnológico. This is anopen access item distributed under the Creative Commons CC License BY-NC-ND 4.0.

 

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Ocampo-López, C., Colorado-Arias, S., & Ramírez-Carmona, M. (2015). Modeling of microbial growth and ammonia consumption at differenttemperatures in the production of a polyhydroxyalkanoate (PHA) biopolymer. Journal of Applied Research and Technology, 13(5). https://doi.org/10.1016/j.jart.2015.10.001