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Title: COMPOSTING OF BIODEGRADABLE PLASTIC WASTE - CHANGES IN THE MICROBIAL COMMUNITY
COMPOSTING OF BIODEGRADABLE PLASTIC WASTE - CHANGES IN THE MICROBIAL COMMUNITY

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Bilyana Grigorova-Pesheva; Boyka Malcheva
10.5593/sgem2023V/4.2/s18.03
10.5593/sgem2023v/4.2
1314-2704
978-619-7603-65-1
English
23
4.2
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Recycling
The present study aimed to track the changes in microbial communities during home composting of biodegradable plastic products (PLA). 6 waste mixtures and controls were prepared, with C:N about 30, placed in containers. The amount of PLA compared to the compostable mixture is 1%. Different depositing methods were used - active composting and placing part of the material in biodegradable bags. Temperature, humidity, pH, C:N ratio were measured. The amounts of bacteria, actinomycetes, micromycetes were recorded during the individual phases of composting, including the initial mixing of the materials. The microbiological analyzes were performed using the counting plate method. The reading is done in colony forming units. Total microbial number (TMN) was calculated. The ratio of the microbial populations in the studied samples with PLA was compared with the dynamics of development of the microbial populations in the control samples. Samples with added PLA have a higher TMN. For samples placed in a biodegradable bag, the thermophilic phase occurs faster and the amounts of microorganisms are higher. In all tested variants, the controls gave lower values of TMN. Some of the biodegradable materials (cutlery) are still discernible at the end stage of the composting process. Standard dynamics were observed in changing the percentage participation of individual microbial groups during the different phases of composting, regardless of added PLA. PLAs stimulate the composting process.
[1] Polman, E.M., Gruter, G.-J.M., Parsons, J.R., Tietema, A. Comparison of the aerobic biodegradation of biopolymers and the corresponding bioplastics: A review. Sci. Total Environ. 2021, 753, 141953, https://doi.org/10.1016/j.scitotenv.2020.141953
[2] Bishop, G., Styles, D., Lens, P.N., Environmental performance comparison of bioplastics and petrochemical plastics: A review of life cycle assessment (LCA) methodological decisions, Resour. Conserv. Recycl. 2021, 168, 105451. https://doi.org/10.1016/j.resconrec.2021.105451
[3] Emadian, S.M.; Onay, T.T.; Demirel, B., Biodegradation of bioplastics in natural environments. Waste Manag. 2017, 59, 526–536. https://doi.org/10.1016/j.wasman.2016.10.006
[4] Partanen, P., Hultman, J., Paulin, L., Auvinen, P., Romantschuk, M. Bacterial diversity at different stages of the composting process. BMC Microbiology, 2010, 10:94;
[5] Franke-Whittle, I., Confalonieri, A., Insam, H., Schlegelmilch, M., Korner, I., Changes in the microbial communities during co-composting of digestates, Waste management 34, 632-641, 2014, DOI: 10.1016/j.wasman.2013.12.009.
[6] Mironov, V., Vanteeva, A., Merkel, A., Microbiological Activity during CoComposting of Food and Agricultural Waste for Soil Amendment, Agronomy, 11(5), 928, 2021, https://doi.org/10.3390/agronomy11050928
[7] Chandna P., Nain, L., Singh, S., Kuhad, R., Assessment of bacterial diversity during composting of agricultural byproducts, BMC Microbiology, 13, 99, 2013 https://doi.org/10.1186/1471-2180-13-99.
[8] Lin, Y., Simulation modeling and process control of composting systems under complexity and uncertainty, University of Regina, 2006, 14-23.
[9] Roman, P., Martinez, M., Pantoja, A, Farmers’s compost handbook. Experiances in Latin America. Santiago:Fao, 2015.
[10] Zhao, X., Li, J., Che, Z., Xue, L., Succession of the Bacterial Communities and Functional Characteristics in Sheep Manure Composting, Biology, 11(8), 1181, 2022, doi: 10.3390/biology11081181.
[11] Wang, J., Liu, Z., Xia, J., Chen, Y., Effect of microbial inoculation on physicochemical properties and bacterial community structure of citrus peel composting. Bioresour. Technol. 2019, 291, 121843, 2019, https://doi.org/10.1016/j.biortech.2019.121843
[12] Qiao, C., Ryan Penton, C., Liu, C., Shen, Z., Ou, Y., Liu, Z., Xu, X., Li, R., Shen, Q., Key extracellular enzymes triggered high-efficiency composting associated with bacterial community succession, Bioresour. Technol. 2019, 288, 121576, https://doi.org/10.1016/j.biortech.2019.121576
[13] Sundberg, C., Smars, S., Jonsson, H., Low pH as an inhibiting factor in the transition from mesophilic to thermophilic phase in composting, Bioresource Technology, 95 (2), 145- 150, 2004, https://doi.org/10.1016/j.biortech.2004.01.016.
[14] Hottle, T., Aguero, M., Bilec, M., Landis, A., Alkaline Amendment for the Enhancement of Compost Degradation for Polylactic Acid Biopolymer Products, ompost Science & Utilization 24(3):159-173, 2016, DOI: 10.1080/1065657X.2015.1102664
The current study was performed in the framework of ‘Investigating interrelationships in different variations of organic waste composting, by creating dynamic compost mixtures with the addition of ameliorants and tracking microbiological and enzyme activity - variants for applying a quality organic-mineral compost-based improver in agricultural practice.’ – KП-Н-66/10” funded by Research Fund of Ministry of Education and Science in Bulgaria.
conference
https://doi.org/10.5593/sgem2023V/4.2/s18.03
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Proceedings of 23rd International Multidisciplinary Scientific GeoConference SGEM 2023
23rd International Multidisciplinary Scientific GeoConference SGEM 2023, 28-30 November, 2023
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference-SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Russian Acad Arts; Turkish Acad Sci.
21-28
28-30 November, 2023
website
9429
biodegradable plastic, PLA, microorganisms, composting, home compost