Polyhydroxyalkanoates (PHA) production by photoheterotrophic microbial consortia: Effect of culture conditions over microbial population and biopolymer yield and composition

Guerra-Blanco, P.; Peña, Omar Fernando Cortés; Poznyak, Tatyana; Chairez, Isaac; García-Peña, E.I.

doi:10.1016/j.eurpolymj.2017.11.007

Cited by 42 publications

(2 citation statements)

References 54 publications

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“…PHB sharply accumulated despite both NH 4 + -N and PO 4 3− -P still being abundant (Figure 2). At 120 h, the PHB content peaked at 0.56 mg/mg of biomass, which is almost 4.3-fold higher than that previously reported by Guerra-Blanco et al 24 In the meantime, the culture released 109 ± 6 mg of P/L of phosphorus from 72 to 96 h with 90 ± 1 mg/L taken back at the highest PHB level (Figure 2B). The observation in this study is different from a previous conclusion that PPB biomass growth and PHA accumulation can be regulated by the level of nutrient availability.…”

Section: Resultsmentioning

confidence: 50%

Pathways and Mechanisms of Single-Cell Protein Production: Carbon and Nutrient Transformation

Zhang

et al. 2021

ACS EST Water

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This study revealed carbon, nitrogen, and phosphorus biotransformation mechanisms of an enriched purple nonsulfur bacterial culture and investigated its ability to recover nutrients from fermented liquor as single-cell protein. Rhodopseudomonas palustris was the dominant species and demonstrated excellent carbon and nutrient removal performance with continuous accumulation of amino acid, carotenoids, and biomass growth. We discovered that the polyhydroxybutyrate (PHB) content varied according to the availability of an external carbon source rather than nutrients, and it was used as a major carbon and energy source to support biomass growth once the external carbon source was limited. Phosphorus exhibited multiple uptake and release patterns that corresponded to the changes in PHB content. With fermented liquor as feed, a total of 53.4% of organic carbon was removed. The biomass yield was 0.89 g of COD biomass/g of COD. Protein occupied 65% of the biomass cell weight, and 15 types of amino acids were identified.

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Section: Resultsmentioning

confidence: 50%

Pathways and Mechanisms of Single-Cell Protein Production: Carbon and Nutrient Transformation

Zhang

et al. 2021

ACS EST Water

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“…Guerra-Blanco et al [75] and Amulya et al [76] found Pseudomonas (relative abundance up to 66.6%) using a synthetic VFA mixture to simulate real fermented wastewater. In both studies the MMC approach was conceived as an integrated technology to be coupled with wastewater treatment plant; hence, particularly focused on the water-line treatment services more than waste management practices.…”

Section: Terrestrial Pha-accumulating Bacteria In Open Mixed Culturementioning

confidence: 99%

From Organic Wastes and Hydrocarbons Pollutants to Polyhydroxyalkanoates: Bioconversion by Terrestrial and Marine Bacteria

et al. 2022

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The use of fossil-based plastics has become unsustainable because of the polluting production processes, difficulties for waste management sectors, and high environmental impact. Polyhydroxyalkanoates (PHA) are bio-based biodegradable polymers derived from renewable resources and synthesized by bacteria as intracellular energy and carbon storage materials under nutrients or oxygen limitation and through the optimization of cultivation conditions with both pure and mixed culture systems. The PHA properties are affected by the same principles of oil-derived polyolefins, with a broad range of compositions, due to the incorporation of different monomers into the polymer matrix. As a consequence, the properties of such materials are represented by a broad range depending on tunable PHA composition. Producing waste-derived PHA is technically feasible with mixed microbial cultures (MMC), since no sterilization is required; this technology may represent a solution for waste treatment and valorization, and it has recently been developed at the pilot scale level with different process configurations where aerobic microorganisms are usually subjected to a dynamic feeding regime for their selection and to a high organic load for the intracellular accumulation of PHA. In this review, we report on studies on terrestrial and marine bacteria PHA-producers. The available knowledge on PHA production from the use of different kinds of organic wastes, and otherwise, petroleum-polluted natural matrices coupling bioremediation treatment has been explored. The advancements in these areas have been significant; they generally concern the terrestrial environment, where pilot and industrial processes are already established. Recently, marine bacteria have also offered interesting perspectives due to their advantageous effects on production practices, which they can relieve several constraints. Studies on the use of hydrocarbons as carbon sources offer evidence for the feasibility of the bioconversion of fossil-derived plastics into bioplastics.

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Identification of Various Metabolites like Gases, Biopolymers and Biosurfactants

Sharma

Tiwari

Pandey

2021

Microbial Enhanced Oil Recovery

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Polyhydroxyalkanoates (PHA) production by photoheterotrophic microbial consortia: Effect of culture conditions over microbial population and biopolymer yield and composition

Cited by 42 publications

References 54 publications

Pathways and Mechanisms of Single-Cell Protein Production: Carbon and Nutrient Transformation

Pathways and Mechanisms of Single-Cell Protein Production: Carbon and Nutrient Transformation

From Organic Wastes and Hydrocarbons Pollutants to Polyhydroxyalkanoates: Bioconversion by Terrestrial and Marine Bacteria

Identification of Various Metabolites like Gases, Biopolymers and Biosurfactants

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