{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T17:13:19Z","timestamp":1791825199323,"version":"4.3.4"},"reference-count":54,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2021,11,25]],"date-time":"2021-11-25T00:00:00Z","timestamp":1637798400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100005401","name":"Ministry of Agricultural, Food and Forestry Policies","doi-asserted-by":"publisher","award":["BIOMOLENER (D.M. 26277\/7303\/09 of 12\/11\/2009)."],"award-info":[{"award-number":["BIOMOLENER (D.M. 26277\/7303\/09 of 12\/11\/2009)."]}],"id":[{"id":"10.13039\/501100005401","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ricerca di Ateneo","award":["(ex 60%) fundings."],"award-info":[{"award-number":["(ex 60%) fundings."]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Microorganisms"],"abstract":"<jats:p>It is urgent to expand the market of biodegradable alternatives to oil-derived plastics owing to (i) increasingly limited oil availability\/accessibility, and (ii) the dramatic impact of traditional plastics on aquatic life, the food chain, all Earth ecosystems, and ultimately, human health. Polyhydroxyalkanoates (PHAs) are promising biodegradable polymers that can be obtained through microbial fermentation of agro-industrial byproducts, e.g., milk and cheese whey. Here, the PHA-accumulating efficiency of a mixed microbial culture (MMC, derived from activated sludges) grown on dairy byproducts (cheese and scotta whey) was measured. Bioreactor tests featuring temperature and pH control showed that both scotta and pre-treated Toma cheese whey could be used for PHA production by MMC, although scotta cheese whey supported higher PHA yield and productivity. The advantages of open MMCs include their plasticity and versatility to fast changing conditions; furthermore, no growth-medium sterilization is needed prior to fermentation. However, the use of pure cultures of efficient PHA producers may support better metabolic performances. Therefore, PHA-producing strains were isolated from a MMC, leading to the satisfactory identification of two bacterial strains, Citrobacter freundii and Leuconostoc spp., whose ability to accumulate PHAs in synthetic media was confirmed. A more detailed investigation by mass spectrometry revealed that the strain was L. mesenteroides. Although the validation of L. mesenteroides potential to produce PHA through fermentation of agro-industrial byproducts requires further investigations, this is the first study reporting PHA production with the Leuconostoc genus.<\/jats:p>","DOI":"10.3390\/microorganisms9122426","type":"journal-article","created":{"date-parts":[[2021,11,30]],"date-time":"2021-11-30T05:42:10Z","timestamp":1638250930000},"page":"2426","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":38,"title":["PHA Production from Cheese Whey and \u201cScotta\u201d: Comparison between a Consortium and a Pure Culture of Leuconostoc mesenteroides"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5249-5426","authenticated-orcid":false,"given":"Francesca","family":"Bosco","sequence":"first","affiliation":[{"name":"Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simona","family":"Cirrincione","sequence":"additional","affiliation":[{"name":"Structural and Functional Biochemistry, Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, Universit\u00e0 di Torino, 10123 Torino, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Riccardo","family":"Carletto","sequence":"additional","affiliation":[{"name":"CNR-STIIMA, Consiglio Nazionale delle Ricerche- Istituto di Sistemi e Tecnologie Industriali Intelligenti per il Manifatturiero Avanzato, 13900 Biella, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0068-4858","authenticated-orcid":false,"given":"Luca","family":"Marmo","sequence":"additional","affiliation":[{"name":"Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6781-682X","authenticated-orcid":false,"given":"Francesco","family":"Chiesa","sequence":"additional","affiliation":[{"name":"Department of Veterinary Science (DSV), Universit\u00e0 degli Studi di Torino, 10095 Grugliasco, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7674-8187","authenticated-orcid":false,"given":"Roberto","family":"Mazzoli","sequence":"additional","affiliation":[{"name":"Structural and Functional Biochemistry, Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, Universit\u00e0 di Torino, 10123 Torino, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Enrica","family":"Pessione","sequence":"additional","affiliation":[{"name":"Structural and Functional Biochemistry, Laboratory of Microbial Biochemistry and Proteomics, Department of Life Sciences and Systems Biology, Universit\u00e0 di Torino, 10123 Torino, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Eriksen, M., Lebreton, L.C.M., Carson, H.S., Thiel, M., Moore, C.J., Borerro, J.C., Galgani, F., Ryan, P.G., and Reisser, J. 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