Producing PHAs in the bioeconomy — Towards a sustainable bioplastic

Dietrich, Karolin; Dumont, Marie‐Josée; Rio, Luis F. Del; Orsat, Valérie

doi:10.1016/j.spc.2016.09.001

Cited by 256 publications

(161 citation statements)

References 37 publications

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“…Increasing the uptake of alternatives that according to solid evidence are more sustainable can also help decrease our dependency on fossil fuels (http://ec.europa.eu/environment/circular-economy/ pdf/plastics-strategy-annex.pdf). In this scenario, the current socioeconomic trend towards sustainable development models has promoted research into the generation of bioplastics such as polyhydroxyalkanoates (Braunegg et al, 2004;Dietrich et al, 2017;Koller et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

In silico prospection of microorganisms to produce polyhydroxyalkanoate from whey: Caulobacter segnis DSM 29236 as a suitable industrial strain

Bustamante

Segarra

Tortajada

et al. 2019

Microbial Biotechnology

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Summary Polyhydroxyalkanoates ( PHA s) are polyesters of microbial origin that can be synthesized by prokaryotes from noble sugars or lipids and from complex renewable substrates. They are an attractive alternative to conventional plastics because they are biodegradable and can be produced from renewable resources, such as the surplus of whey from dairy companies. After an in silico screening to search for ß‐galactosidase and PHA polymerase genes, several bacteria were identified as potential PHA producers from whey based on their ability to hydrolyse lactose. Among them, Caulobacter segnis DSM 29236 was selected as a suitable strain to develop a process for whey surplus valorization. This microorganism accumulated 31.5% of cell dry weight ( CDW ) of poly(3‐hydroxybutyrate) ( PHB ) with a titre of 1.5 g l −1 in batch assays. Moreover, the strain accumulated 37% of CDW of PHB and 9.3 g l −1 in fed‐batch mode of operation. This study reveals this species as a PHA producer and experimentally validates the in silico bioprospecting strategy for selecting microorganisms for waste re‐valorization.

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Section: Introductionmentioning

confidence: 99%

In silico prospection of microorganisms to produce polyhydroxyalkanoate from whey: Caulobacter segnis DSM 29236 as a suitable industrial strain

Bustamante

Segarra

Tortajada

et al. 2019

Microbial Biotechnology

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“…Also central to a circular bioeconomy is the concept of “cascading utilization” (Keegan et al, 2013), whereby biomass is first used for production with the highest societal value (highest economic value). For example, high‐value specialist biomaterials and chemicals are reused in bulk materials and finally for production of biofuels and power, with loss by burning at the very end of the life cycle (Dietrich et al, 2017; Priefer et al, 2017). Accordingly, the bioeconomy will require profound societal transitions, with changing public attitudes to waste and recycling being an important lever for reducing the demand for biomass.…”

Section: Phosphorus: the Poster Child For Circularization Within The mentioning

confidence: 99%

Future Phosphorus: Advancing New 2D Phosphorus Allotropes and Growing a Sustainable Bioeconomy

et al. 2019

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With more than 40 countries currently proposing to boost their national bioeconomies, there is no better time for a clarion call for a “new” bioeconomy, which, at its core, tackles the current disparities and inequalities in phosphorus (P) availability. Existing biofuel production systems have widened P inequalities and contributed to a linear P economy, impairing water quality and accelerating dependence on P fertilizers manufactured from finite nonrenewable phosphate rock reserves. Here, we explore how the emerging bioeconomy in novel, value‐added, bio‐based products offers opportunities to rethink our stewardship of P. Development of integrated value chains of new bio‐based products offers opportunities for codevelopment of “P refineries” to recover P fertilizer products from organic wastes. Advances in material sciences are exploiting unique semiconductor and opto‐electrical properties of new “two‐dimensional” (2D) P allotropes (2D black phosphorus and blue phosphorus). These novel P materials offer the tantalizing prospect of step‐change innovations in renewable energy production and storage, in biomedical applications, and in biomimetic processes, including artificial photosynthesis. They also offer a possible antidote to the P paradox that our agricultural production systems have engineered us into, as well as the potential to expand the future role of P in securing sustainability across both agroecological and technological domains of the bioeconomy. However, a myriad of social, technological, and commercialization hurdles remains to be crossed before such an advanced circular P bioeconomy can be realized. The emerging bioeconomy is just one piece of a much larger puzzle of how to achieve more sustainable and circular horizons in our future use of P. Core Ideas Society's vision for a more circular economy must go beyond the C cycle to include P. Some biofuel systems have widened P inequalities and contributed to a linear P economy. New bioeconomy in bio‐based products offers an opportunity to rethink P stewardship. A circular bioeconomy requires efficient P reuse, recovery, and recycling from waste. New 2D P allotrope technologies offer a potential antidote to our current P “paradox.”

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“…To address the use of inexpensive carbon sources, biorefinery concepts are developed these days, which resort to carbon-rich side streams of diverse (agro)industrial processes to be used as "2 nd -generation feedstocks" for PHA production (15,16). In this context, as the first core topic of this review, lactose-rich surplus whey from dairy industry is another viable feedstock for PHA production (17).…”

Section: Polyhydroxyalkanoates (Pha) -A Biological Alternativementioning

confidence: 99%

Advanced approaches to produce polyhydroxyalkanoate (PHA) biopolyesters in a sustainable and economic fashion

Koller

Braunegg

2018

The EuroBiotech Journal

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Polyhydroxyalkanoates (PHA), the only group of "bioplastics" sensu stricto, are accumulated by various prokaryotes as intracellular "carbonosomes". When exposed to exogenous stress or starvation, presence of these microbial polyoxoesters of hydroxyalkanoates assists microbes to survive."Bioplastics" such as PHA must be competitive with petrochemically manufactured plastics both in terms of material quality and manufacturing economics. Cost-effectiveness calculations clearly show that PHA production costs, in addition to bioreactor equipment and downstream technology, are mainly due to raw material costs. The reason for this is PHA production on an industrial scale currently relying on expensive, nutritionally relevant "1 st -generation feedstocks", such as like glucose, starch or edible oils. As a way out, carbon-rich industrial waste streams ("2 nd -generation feedstocks") can be used that are not in competition with the supply of food; this strategy not only reduces PHA production costs, but can also make a significant contribution to safeguarding food supplies in various disadvantaged parts of the world. This approach increases the economics of PHA production, improves the sustainability of the entire lifecycle of these materials, and makes them unassailable from an ethical perspective.In this context, our EU-funded projects ANIMPOL and WHEYPOL, carried out by collaborative consortia of academic and industrial partners, successfully developed PHA production processes, which resort to waste streams amply available in Europe. As real 2 nd -generation feedstocks", waste lipids and crude glycerol from animal-processing and biodiesel industry, and surplus whey from dairy and cheese making industry were used in these processes. Cost estimations made by our project partners determine PHA production prices below 3 € (WHEYPOL) and even less than 2 € (ANIMPOL), respectively, per kg; these values already reach the benchmark of economic feasibility.The presented studies clearly show that the use of selected high-carbon waste streams of (agro)industrial origin contributes significantly to the cost-effectiveness and sustainability of PHA biopolyester production on an industrial scale.

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Producing PHAs in the bioeconomy — Towards a sustainable bioplastic

Cited by 256 publications

References 37 publications

In silico prospection of microorganisms to produce polyhydroxyalkanoate from whey: Caulobacter segnis DSM 29236 as a suitable industrial strain

In silico prospection of microorganisms to produce polyhydroxyalkanoate from whey: Caulobacter segnis DSM 29236 as a suitable industrial strain

Future Phosphorus: Advancing New 2D Phosphorus Allotropes and Growing a Sustainable Bioeconomy

Advanced approaches to produce polyhydroxyalkanoate (PHA) biopolyesters in a sustainable and economic fashion

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