Abstract

CORTES LASSO, Daina Yuliana; CONTRERAS ROA, Angie Valeria; CAMACHO KURMEN, Judith Elena  and  GUZMAN LUNA, Carolina. Adaptation of native microbial consortia, present in sewage sludge for polyhydroxyalkanoates (PHA's) accumulation. Rev. ion [online]. 2024, vol.37, n.1, pp.99-115.  Epub May 06, 2024. ISSN 0120-100X.  https://doi.org/10.18273/revion.v37n1-2024007.

Polyhydroxyalkanoates (PHA's) are biodegradable and biocompatible natural polyesters synthesized by a wide range of bacteria as a carbon reserve and their chemical composition varies according to the substrate used, the metabolic route used by the microorganism and the PHA-synthase enzyme. Considering the Sustainable Development Goals (SDG), the circular economy and the reuse of wastewater, the purpose of this research is to describe, through the review of scientific literature, aspects related to the adaptation and selection of native microbial consortia that achieve a high accumulation of PHAs from wastewater treatment plant sludge. The production of these polymers is conditioned to the formulation of the culture medium to favor the increase in biomass and subsequently its accumulation. For this, microbial feeding strategies have been described, starting with a nutrient-enriched medium, followed by a product formation phase in a limited medium, a process known as feast and famine, which is a strategy currently used. Mixed microbial consortia from wastewater treatment plants are promising to produce PHAs from volatile fatty acids using the feast and famine strategy

Keywords : Domestic sewage sludge; PHA's; Feeding strategies; Native microbial consortia; Volatile fatty acids.

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