Food waste conversion to microbial polyhydroxyalkanoates

Nielsen, Chad; Rahman, Asif; Rehman, Asad Ur; Walsh, Marie K.; Miller, Charles D.

doi:10.1111/1751-7915.12776

Cited by 175 publications

(85 citation statements)

References 118 publications

(143 reference statements)

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“…In this context, agrowastes and residues from the food industry are good candidates for PHA production since they offer abundant and inexpensive carbon source. There is a large open field to convert food waste or by-products in PHAs and different wastes have been proposed to date, such as whey, starch, oils, spent coffee grounds, pea-shell slurry, etc [11,12] .…”

Section: Introductionmentioning

confidence: 99%

Application of cider by-products for medium chain length polyhydroxyalkanoate production by Pseudomonas putida KT2440

Urbina

Wongsirichot

Corcuera

et al. 2018

European Polymer Journal

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In this study the technical feasibility of using cider by-products as a substrate for the production of medium chain length polyhydroxyalkanoates (mcl-PHAs) by Pseudomonas putida KT2440 is demonstrated. The untreated apple pomace was found to be composed of two main residual sugars, glucose and fructose, making it a promising cheap growth substrate. A PHA concentration of 1.1 g L-1 and a PHA accumulation of 25.5 % were obtained in flask experiments using apple pomace as the sole carbon source without any pretreatment, employing a fed batch strategy. The biopolymer was extracted from the biomass and a detailed characterization was carried out. The solution-casted film was found to be a mcl-PHA copolymer composed by different saturated and unsaturated ester monomers with elastomeric characteristics making it suitable for applications in biomedicine or the processing of value added coproducts such as environmentally friendly adhesives or biodegradable films for agricultural purposes.

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Section: Introductionmentioning

confidence: 99%

Application of cider by-products for medium chain length polyhydroxyalkanoate production by Pseudomonas putida KT2440

Urbina

Wongsirichot

Corcuera

et al. 2018

European Polymer Journal

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“…Actualmente en este aspecto se está estudiando el empleo de sustratos ricos en azúcares como las melazas, mieles, jarabes y jugos, así como el empleo de sustratos lignocelulósicos como el bagazo de caña, pajas de arroz, sorgo y cáscaras de frutas o verduras. También el uso de subproductos de la industria láctea y aceitera han sido reportados para este objetivo (Nielsen et al, 2017;Koller & Braunegg, 2018). Las melazas, mieles y jarabes son fuentes de carbono económicas que favorecen la biosíntesis de PHB en el género Bacillus debido a la disposición de carbohidratos fermentables (Sathya et al, 2018), los cuales son metabolizados a través de la glicolisis y la vía de la pentosa fosfato donde las moléculas resultantes de acetil-CoA son redirigidas del ciclo de Krebs a la ruta biosintética de acumulación de PHAs.…”

Section: Discusionesunclassified

Statistical optimization and effect of mesquite honey and maize alkaline wastewater (nejayote) as substrates for cellular biomass production and polyhydroxybutyrate biosynthesis by Bacillus cereus 4N

Martínez-Herrera¹,

Juárez-Ibarra²,

Cantú³

et al. 2020

Mexjbiotechnol

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Polyhydroxybutyrate (PHB) is a bacterial biopolymer with interesting features that make it useful in diverse areas of human development. The problem around this biomaterial is its high production cost, so researchers have focused their attention on the search of economic substrates to be used in the fermentation process. The present work is focused on designing a formulation based on mesquite honey and nejayote for cellular biomass and PHB generation by Bacillus cereus 4N, relying on the central compounds design and factorial design as statistical tools. The substrates employed were characterized by bromatological analysis and the biopolymer obtained from the fermentation process was analyzed by FT-IR. These results show that mesquite honey at 15 g/L influence a high cellular biomass

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“…As a more and more acknowledged exit strategy out of this predicament, one could link food industry with biopolymer industry in a synergistic way. Companies involved in food and feed production and processing produce huge quantities of carbon-rich waste streams, which could be used at zero costs as feedstocks by biopolymer producing companies (18). To underline the feasibility and importance of this still new paradigm, one should keep in mind that an estimated annual quantity of about 10 12 kg of food is not consumed by humans, but simply rejected (19).…”

Section: Biological Alternatives To Established Plasticsmentioning

confidence: 99%

Switching from petro-plastics to microbial polyhydroxyalkanoates (PHA): the biotechnological escape route of choice out of the plastic predicament?

Koller

2019

The EuroBiotech Journal

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The benefit of biodegradable “green plastics” over established synthetic plastics from petro-chemistry, namely their complete degradation and safe disposal, makes them attractive for use in various fields, including agriculture, food packaging, and the biomedical and pharmaceutical sector. In this context, microbial polyhydroxyalkanoates (PHA) are auspicious biodegradable plastic-like polyesters that are considered to exert less environmental burden if compared to polymers derived from fossil resources. The question of environmental and economic superiority of bio-plastics has inspired innumerable scientists during the last decades. As a matter of fact, bio-plastics like PHA have inherent economic drawbacks compared to plastics from fossil resources; they typically have higher raw material costs, and the processes are of lower productivity and are often still in the infancy of their technical development. This explains that it is no trivial task to get down the advantage of fossil-based competitors on the plastic market. Therefore, the market success of biopolymers like PHA requires R&D progress at all stages of the production chain in order to compensate for this disadvantage, especially as long as fossil resources are still available at an ecologically unjustifiable price as it does today. Ecological performance is, although a logical argument for biopolymers in general, not sufficient to make industry and the society switch from established plastics to bio-alternatives. On the one hand, the review highlights that there’s indeed an urgent necessity to switch to such alternatives; on the other hand, it demonstrates the individual stages of the production chain, which need to be addressed to make PHA competitive in economic, environmental, ethical, and performance-related terms. In addition, it is demonstrated how new, smart PHA-based materials can be designed, which meet the customer’s expectations when applied, e.g., in the biomedical or food packaging sector.

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Food waste conversion to microbial polyhydroxyalkanoates

Cited by 175 publications

References 118 publications

Application of cider by-products for medium chain length polyhydroxyalkanoate production by Pseudomonas putida KT2440

Application of cider by-products for medium chain length polyhydroxyalkanoate production by Pseudomonas putida KT2440

Statistical optimization and effect of mesquite honey and maize alkaline wastewater (nejayote) as substrates for cellular biomass production and polyhydroxybutyrate biosynthesis by Bacillus cereus 4N

Switching from petro-plastics to microbial polyhydroxyalkanoates (PHA): the biotechnological escape route of choice out of the plastic predicament?

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