Microbial community acclimatization enhances bioplastics biodegradation and biogas production under thermophilic anaerobic digestion. 2023

Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
Gruppo Ricicla labs., Dipartimento di Scienze Agrarie e Ambientali - Produzione, Territorio, Agroenergia (DiSAA), Università degli studi di Milano, Via Celoria 2, 20133 Milano, Italy; Department for Sustainability, Biotechnologies and Agroindustry Division, ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Casaccia Research Center, Via Anguillarese 301, 00123 Rome, Italy.

This paper reports the results of a novel study of microbial acclimatization for bioplastics anaerobic degradation and conversion into biogas. Three sequential anaerobic digestion (AD) runs were carried out to favour microbial acclimatization to two different bioplastics, starch-based (SBS) and polyactic-acid (PLA). AD of SBS and PLA bioplastics was favoured by the acclimatization of the inoculum to the substrate after each run of AD. SBS conversion into biogas increased by 52 % (from 94 to 143 NL kgVS-1) and it was correlated with the enhanced growth of starch degrading bacteria such as Hydrogenispora, Halocella and Haloplasma. PLA anaerobic degradation increased by 97 % (from 395 to 779 NLbiogas kgVS-1) and it was related to the acclimatization of known PLA-degraders such as Tepidimicrobium, Methanothermobacter and Tepidanaerobacter. Microbial acclimatization appears a suitable and low-cost strategy to enhance bioplastics circularity by promoting their anaerobic biodegradation and conversion into biogas.

UI MeSH Term Description Entries
D008697 Methane The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed)
D011091 Polyesters Polymers of organic acids and alcohols, with ester linkages--usually polyethylene terephthalate; can be cured into hard plastic, films or tapes, or fibers which can be woven into fabrics, meshes or velours. Polyester
D000064 Acclimatization Adaptation to a new environment or to a change in the old. Acclimation
D000068536 Firmicutes A phylum of predominantly GRAM-POSITIVE BACTERIA that includes the orders Bacillales and Clostridiales. Firmicutes and BACTEROIDETES are the two bacterial phyla that constitute the majority of the human gut MICROBIOTA.
D000693 Anaerobiosis The complete absence, or (loosely) the paucity, of gaseous or dissolved elemental oxygen in a given place or environment. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Anaerobic Metabolism,Anaerobic Metabolisms,Anaerobioses,Metabolism, Anaerobic,Metabolisms, Anaerobic
D013213 Starch Any of a group of polysaccharides of the general formula (C6-H10-O5)n, composed of a long-chain polymer of glucose in the form of amylose and amylopectin. It is the chief storage form of energy reserve (carbohydrates) in plants. Amylomaize Starch,Amylum,Cornstarch,Keoflo,Starch, Amylomaize
D056804 Biofuels Hydrocarbon-rich byproducts from the non-fossilized BIOMASS that are combusted to generate energy as opposed to fossilized hydrocarbon deposits (FOSSIL FUELS). Biodiesel,Biofuel,Biofuel Oils,Biogas,Biodiesels,Biofuel Oil,Oil, Biofuel,Oils, Biofuel
D019149 Bioreactors Tools or devices for generating products using the synthetic or chemical conversion capacity of a biological system. They can be classical fermentors, cell culture perfusion systems, or enzyme bioreactors. For production of proteins or enzymes, recombinant microorganisms such as bacteria, mammalian cells, or insect or plant cells are usually chosen. Fermentors,Bioreactor,Fermentor
D064307 Microbiota The full collection of microbes (bacteria, fungi, virus, etc.) that naturally exist within a particular biological niche such as an organism, soil, a body of water, etc. Human Microbiome,Microbiome,Microbiome, Human,Microbial Community,Microbial Community Composition,Microbial Community Structure,Community Composition, Microbial,Community Structure, Microbial,Community, Microbial,Composition, Microbial Community,Human Microbiomes,Microbial Communities,Microbial Community Compositions,Microbial Community Structures,Microbiomes,Microbiotas

Related Publications

Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
January 2004, Journal of bioscience and bioengineering,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
October 2021, Bioresource technology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
October 2014, Journal of environmental management,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
February 2018, Applied biochemistry and biotechnology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
May 2022, Archives of microbiology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
July 2006, Applied microbiology and biotechnology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
December 2015, Journal of applied microbiology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
May 2022, Life (Basel, Switzerland),
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
January 2018, Applied microbiology and biotechnology,
Elisa Clagnan, and Mirko Cucina, and Raveena Vilas Sajgule, and Patrizia De Nisi, and Fabrizio Adani
August 2018, Bioresource technology,
Copied contents to your clipboard!