Comparative study of polyhydroxyalkanoates production from acidified and anaerobically treated brewery wastewater using enriched mixed microbial culture

Tamang, Pravesh; Banerjee, Rintu; Köster, Stephan; Nogueira, R.

doi:10.1016/j.jes.2018.09.001

Cited by 29 publications

(12 citation statements)

References 23 publications

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“…PHBV copolymers have also been produced in MMC-based processes, starting from a various range of complex organic substrates, such as food waste (Gouveia et al, 2017), municipal wastewater sludge (Wijeyekoon et al, 2018), the liquid fraction resulting from pyrolysis processes (Bio-oil) (Moita Fidalgo et al, 2014), and brewery wastewaters (Tamang et al, 2019). In an interesting example, the modulation of pH in the range of 4.5-7 during the acidogenic reactor operating conditions led to different monomer precursor profiles, which resulted in PHBHV copolymers with different compositions starting from cheese whey as model feedstock (Gouveia et al, 2017).…”

Section: Poly (3-hydroxybutyrate-co-hydroxyvalerate)mentioning

confidence: 99%

In vivo and Post-synthesis Strategies to Enhance the Properties of PHB-Based Materials: A Review

Turco

Santagata

Corrado

et al. 2021

Front. Bioeng. Biotechnol.

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The transition toward “green” alternatives to petroleum-based plastics is driven by the need for “drop-in” replacement materials able to combine characteristics of existing plastics with biodegradability and renewability features. Promising alternatives are the polyhydroxyalkanoates (PHAs), microbial biodegradable polyesters produced by a wide range of microorganisms as carbon, energy, and redox storage material, displaying properties very close to fossil-fuel-derived polyolefins. Among PHAs, polyhydroxybutyrate (PHB) is by far the most well-studied polymer. PHB is a thermoplastic polyester, with very narrow processability window, due to very low resistance to thermal degradation. Since the melting temperature of PHB is around 170–180°C, the processing temperature should be at least 180–190°C. The thermal degradation of PHB at these temperatures proceeds very quickly, causing a rapid decrease in its molecular weight. Moreover, due to its high crystallinity, PHB is stiff and brittle resulting in very poor mechanical properties with low extension at break, which limits its range of application. A further limit to the effective exploitation of these polymers is related to their production costs, which is mostly affected by the costs of the starting feedstocks. Since the first identification of PHB, researchers have faced these issues, and several strategies to improve the processability and reduce brittleness of this polymer have been developed. These approaches range from the in vivo synthesis of PHA copolymers, to the enhancement of post-synthesis PHB-based material performances, thus the addition of additives and plasticizers, acting on the crystallization process as well as on polymer glass transition temperature. In addition, reactive polymer blending with other bio-based polymers represents a versatile approach to modulate polymer properties while preserving its biodegradability. This review examines the state of the art of PHA processing, shedding light on the green and cost-effective tailored strategies aimed at modulating and optimizing polymer performances. Pioneering examples in this field will be examined, and prospects and challenges for their exploitation will be presented. Furthermore, since the establishment of a PHA-based industry passes through the designing of cost-competitive production processes, this review will inspect reported examples assessing this economic aspect, examining the most recent progresses toward process sustainability.

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Section: Poly (3-hydroxybutyrate-co-hydroxyvalerate)mentioning

confidence: 99%

In vivo and Post-synthesis Strategies to Enhance the Properties of PHB-Based Materials: A Review

Turco

Santagata

Corrado

et al. 2021

Front. Bioeng. Biotechnol.

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“…Wastewater streams produced in the food processing industry containing high organic content appear as suitable substrates for PHA production, such as those from sugar factories [13], the brewery industry [14] and cheese whey from cheese production [15]. Therefore, PHA production using MMC represents an opportunity to recover organic carbon from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Polyhydroxyalkanoates from Cooked Mussel Processing Wastewater at High Salinity and Acidic Conditions

et al. 2020

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Polyhydroxyalkanoates (PHA) are biodegradable polymers that can be intracellularly produced by microorganisms valorizing organic-rich wastes. In the present study, a PHA production system was fed with mussel cooker wastewater after acidogenic fermentation. Besides low pH (4.0 ± 0.3) and high salt (21.7 ± 2.9 g NaCl/L) concentrations, this wastewater also contained nitrogen concentrations (0.8 ± 0.1 g N/L), which were previously reported to be a challenge to the PHA accumulating bacteria enrichment. Bacteria with a PHA storage capacity were selected in an enrichment sequencing batch reactor (SBR) after 60 days of operation. The enriched mixed microbial culture (MMC) was mainly formed by microorganisms from phylum Bacteroidetes, and genera Azoarcus, Comamonas and Thauera from phylum Proteobacteria. The MMC was able to accumulate up to 25 wt% of PHA that was mainly limited by the wastewater nitrogen content, which promoted biomass growth instead of PHA accumulation. Indeed, when the presence of nutrient was limited, PHA stored in the accumulation reactor increased to up to 40.9 wt%. This work demonstrated the feasibility of the enrichment of a MMC with a PHA storage ability valorizing the fish-canning industrial wastewater at low pH, which is generally difficult to treat in wastewater treatment plants.

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“…However, the concurrent and critical scrutinization of bioplastic had suggested significant obligations in its development and commercialization, including the higher cost of bio-based substrates, microbe cultivation methodologies, and downstream processing. Perhaps, rethinking and considering the synergized cost of bioplastic production and waste management, while focusing mainly on various inexpensive biological substrates required for improved microbial growth, such as various effluents from industries, byproducts of industries like whey or crude glycerol or simply municipal waste ( Amaro et al, 2019 ; Tamang et al, 2019 ; Wen et al, 2020 ) might give us a new perspective for economic and environmental evaluation of bioplastic regulatory framework comprising of its production, usage, and natural degradation. Carbon dioxide (CO 2 ), methane (CH 4 ), and syngas can also be used as an efficient substrate for the production of bio-based products, which further aids in the sequestration of greenhouse gases as well as in wastewater treatment ( Sciarria et al, 2018 ; Pérez et al, 2020 ; Battashi et al, 2021).…”

Section: Bioplastics “State-of-the-art”mentioning

confidence: 99%

Insightful Advancement and Opportunities for Microbial Bioplastic Production

et al. 2022

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Impetuous urbanization and population growth are driving increased demand for plastics to formulate impeccable industrial and biomedical commodities. The everlasting nature and excruciating waste management of petroleum-based plastics have catered to numerous challenges for the environment. However, just implementing various end-of-life management techniques for assimilation and recycling plastics is not a comprehensive remedy; instead, the extensive reliance on finite resources needs to be reduced for sustainable production and plastic product utilization. Microorganisms, such as bacteria and algae, are explored substantially for their bioplastic production repertoire, thus replacing fossil-based plastics sooner or later. Nevertheless, the utilization of pure microbial cultures has led to various operational and economical complications, opening the ventures for the usage of mixed microbial cultures (MMCs) consisting of bacteria and algae for sustainable production of bioplastic. The current review is primarily focuses on elaborating the bioplastic production capabilities of different bacterial and algal strains, followed by discussing the quintessence of MMCs. The present state-of-the-art of bioplastic, different types of bacterial bioplastic, microalgal biocomposites, operational factors influencing the quality and quantity of bioplastic precursors, embracing the potential of bacteria-algae consortia, and the current global status quo of bioplastic production has been summarized extensively.

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Comparative study of polyhydroxyalkanoates production from acidified and anaerobically treated brewery wastewater using enriched mixed microbial culture

Cited by 29 publications

References 23 publications

In vivo and Post-synthesis Strategies to Enhance the Properties of PHB-Based Materials: A Review

In vivo and Post-synthesis Strategies to Enhance the Properties of PHB-Based Materials: A Review

Recovery of Polyhydroxyalkanoates from Cooked Mussel Processing Wastewater at High Salinity and Acidic Conditions

Insightful Advancement and Opportunities for Microbial Bioplastic Production

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