Fate of β-hexachlorocyclohexane in the mixed microbial cultures (MMCs) three-stage polyhydroxyalkanoates (PHA) production process from cheese whey

Valentino, Francesco; Riccardi, Carmela; Campanari, Sabrina; Pomata, Donatella; Majone, Mauro

doi:10.1016/j.biortech.2015.05.083

Cited by 36 publications

(13 citation statements)

References 29 publications

(37 reference statements)

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“…TSS and VSS were determined as reported by Valentino et al in 2015 [ 28 ]. OA concentrations measured on filtered samples (filter diameter of 0.45 µm) were determined by high-performance liquid chromatography (HPLC) using a chromatograph equipped with a UV detector and Aminex HPX-87H column (column temperature 20 °C, 0.0025 M H 2 SO 4 eluent, flow rate 0.6 mL min −1 ).…”

Section: Methodsmentioning

confidence: 99%

Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

Colombo

Favini

Scaglia

et al. 2017

Biotechnol Biofuels

112

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BackgroundIn Europe, almost 87.6 million tonnes of food waste are produced. Despite the high biological value of food waste, traditional management solutions do not consider it as a precious resource. Many studies have reported the use of food waste for the production of high added value molecules. Polyhydroxyalkanoates (PHAs) represent a class of interesting bio-polyesters accumulated by different bacterial cells, and has been proposed for production from the organic fraction of municipal solid waste (OFMSW). Nevertheless, until now, no attention has been paid to the entire biological process leading to the transformation of food waste to organic acids (OA) and then to PHA, getting high PHA yield per food waste unit. In particular, the acid-generating process needs to be optimized, maximizing OA production from OFMSW. To do so, a pilot-scale Anaerobic Percolation Biocell Reactor (100 L in volume) was used to produce an OA-rich percolate from OFMSW which was used subsequently to produce PHA.ResultsThe optimized acidogenic process resulted in an OA production of 151 g kg−1 from fresh OFMSW. The subsequent optimization of PHA production from OA gave a PHA production, on average, of 223 ± 28 g kg−1 total OA fed. Total mass balance indicated, for the best case studied, a PHA production per OFMSW weight unit of 33.22 ± 4.2 g kg−1 from fresh OFMSW, corresponding to 114.4 ± 14.5 g kg−1 of total solids from OFMSW. PHA composition revealed a hydroxybutyrate/hydroxyvalerate (%) ratio of 53/47 and Mw of 8∙105 kDa with a low polydispersity index, i.e. 1.4.ConclusionsThis work showed how by optimizing acidic fermentation it could be possible to get a large amount of OA from OFMSW to be then transformed into PHA. This step is important as it greatly affects the total final PHA yield. Data obtained in this work can be useful as the starting point for considering the economic feasibility of PHA production from OFMSW by using mixed culture.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0888-8) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

Colombo

Favini

Scaglia

et al. 2017

Biotechnol Biofuels

112

View full text Add to dashboard Cite

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“…This calls for fully reconsidering the matter of contaminant migration in waste "recycling" by taking into account that different technologies and novel products can completely change the scenario. As an example, the use of organic wastes to produce biopolymer such as polyhydroxyalkanoates (PHAs) by microbial fermentation processes is a widely studied approach [19]; however, PCBs could be present in bioreactor feedstock and be transferred to the final product. Since PHA-based bioplastics can be used in biomedical applications, to produce multilayer food packaging, durable goods etc.…”

Section: Introductionmentioning

confidence: 99%

Polychlorinated Biphenyl Profile in Polyhydroxy-alkanoates Synthetized from Urban Organic Wastes

et al. 2020

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The microbial synthesis of polyhydroxyalkanoates (PHA) from organic wastes is a valuable process to valorize available renewable resources, such as food wastes and biological sludge. Bioplastics find many applications in various sectors, from medical field to food industry. However, persistent organic pollutants could be transferred from wastes to the final product. The present paper demonstrates that the use of municipal wastes in PHA production is safe for the environment and human health and provides a polychlorinated biphenyl (PCB) profile in both commercial and waste-based PHA samples. PCB analysis in several PHA samples showed very low concentrations of the target analytes. Commercial PHA samples showed a similar PCB level with respect to PHA samples from municipal waste/sludge and higher than PHA samples from fruit waste. For all analyzed PCBs, detected concentrations were consistently lower than the ones reported in regulatory framework or guidelines.

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“…All in all, more and more carbon sources that are less expensive such as potato starch (Ali and Jamil ), and cheese whey (Valentino et al . ) are suitable for microbial cultivation processes.…”

Section: The Optimized Strategies Used In the Production Of Phasmentioning

confidence: 99%

“…Polyhydroxyalkanoates accumulated by various bacteria his coworkers, they successfully used crude glycerol phase (CGP) as the carbon source for synthesizing PHAs in replace of expensive carbon sources(Hermann-Krauss et al 2013). All in all, more and more carbon sources that are less expensive such as potato starch (Ali and Jamil 2014), and cheese whey(Valentino et al 2015b) are suitable for microbial cultivation processes.…”

mentioning

confidence: 99%

Recent strategies for efficient production of polyhydroxyalkanoates by micro-organisms

Liu

Zhang

et al. 2015

Lett Appl Microbiol

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Polyhydroxyalkanoates (PHAs) are polyesters accumulated by many bacteria under unbalanced growth conditions, and have been used to meet the various demands in areas of agriculture, medicine, and materials especially belong to a rapidly expanding area of biomedical research. Unfortunately, the high production cost than the traditional synthetic materials has greatly limited the wide application of PHA. Here, we systematically summarized recent progress in production of PHAs and a series of optimization strategies such as supplying renewable carbon substrates, developing better bacterial strains, optimization of fermentation processes, engineering new pathways and etc., were applied to reduce production cost, therefore providing many new ideas and methods for the production of PHAs in economically viable processes. This is believed to be a comprehensive report to show different strategies and methods for low-cost production of PHAs. Further studies are still needed to make PHAs more and more economically viable to meet a wide range of applicability.

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Fate of β-hexachlorocyclohexane in the mixed microbial cultures (MMCs) three-stage polyhydroxyalkanoates (PHA) production process from cheese whey

Cited by 36 publications

References 29 publications

Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

Enhanced polyhydroxyalkanoate (PHA) production from the organic fraction of municipal solid waste by using mixed microbial culture

Polychlorinated Biphenyl Profile in Polyhydroxy-alkanoates Synthetized from Urban Organic Wastes

Recent strategies for efficient production of polyhydroxyalkanoates by micro-organisms

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