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2025, Vol. 23, No. 1

Selle kollektsiooni püsiv URIhttp://hdl.handle.net/10492/10055

Sirvi

Sirvi 2025, Vol. 23, No. 1 Autor "Cecchin, D." järgi

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  • Pisipilt
    Kirje
    Agroindustrial wastewater: recent advances and perspectives on the use of constructed wetlands
    (Estonian University of Life Sciences, 2025) Castelo, L.L.; Cecchin, D.; do Carmo, D.F.; Hüther, C.M.; Rodrigues, C.P.; Machado, T.B.; da Silva, L.D.B.; da Silva, F.C.; da Silva, J.P.; Hamacher, L.S.
    The treatment of wastewater generated by agro-industrial activities, such as dairy production and animal slaughter, represents a significant environmental challenge due to the complexity of pollutants. This study aimed to conduct a systematic literature review on recent advances in the application of constructed wetlands for the treatment of wastewater from agro-industrial activities. The bibliographic survey was carried out using the Scopus database, where the following keywords were used: ‘Cattle wastewater’, ‘Fertigation’, and ‘Constructed Wetlands’, covering the period from 2014 to 2024. After applying filters and inclusion/exclusion criteria, the search resulted in 82 articles. The distribution of publications over the analyzed period was examined, and a keyword co-occurrence map was created using the VOSviewer software. The results indicate that the use of constructed wetlands combined with techniques such as photobioreactors and anaerobic digestion demonstrates high efficiency in pollutant removal while enabling resource recovery, such as biogas and nutrients. The analysis of the co-occurrence map revealed interconnected themes, suggesting a convergence of studies around hybrid solutions for wastewater treatment in dairy production, livestock farming, and slaughterhouses. Finally, the study highlights the main challenges related to the removal of emerging contaminants and the spread of antimicrobial resistance, emphasizing the need for rigorous monitoring and the implementation of effective public policies to ensure environmental safety and the sustainable use of water resources.
  • Pisipilt
    Kirje
    Life cycle assessment (LCA) in construction materials – Review
    (Estonian University of Life Sciences, 2025) Carvalho, J.G.R.O.; Cecchin, D.; de Azevedo, A.R.G.; do Carmo, D.F.; Paes, J.L.; Ferraz, P.F.P.; Hamacher, L.S.; Costa, K.A.; Rossi, G.; Bambi, G.
    The construction industry is one of the most impactful sectors in terms of natural resource consumption and greenhouse gas emissions, demanding more sustainable and efficient solutions. This study systematically reviews the applicatication of Life Cycle Assessment (LCA) to evaluate sustainable materials and practices within the construction sector, emphasizing the replacement of tradicional materials with recycled, bioeconomic, and low-carbon alternatives. A systematic review was conducted using the Scopus database, covering studies published between 2020 and September 2024. The methodology included the use of VOS viewer software to generate keyword co-occurrence maps, aiding in the identification of emerging trends and patterns. Key findings indicate substantial environmental benefits from incorporating industrial wastes, agricultural by-products, and bioeconomic materials, demonstrating substantial reductions in CO₂ emissions, energy consumption, and natural resource usage. The analysis also highlights emerging technologies, such as 3D printing and nanotechnology, as innovative tools that further enhance sustainability in construction. However, challenges persist, including limited availability of reliable regional data, methodological complexities, and gaps in integrating socio-economic variables into LCA analyses. This paper contributes to advancing sustainable construction by identifying critical gaps and challenges, proposing strategies for improved data collection, recommending enhanced interdisciplinary collaboration, and suggesting increased governmental support and regulatory frameworks to promote broader adoption of LCA in industry practices.
  • Pisipilt
    Kirje
    Remotely piloted aircraft for monitoring greenhouse gases in dairy production systems
    (Estonian University of Life Sciences, 2025) Aguiar, J.V.; Ferraz, P.F.P.; Ferraz, G.A.S.; Ferreira, J.C.; Cecchin, D.; Mattia, A.; Conti, L.; Rossi, G.
    The monitoring of greenhouse gas (GHG) emissions in dairy cattle facilities is essential for understanding and mitigating the environmental impact of livestock farming. Among the main gases emitted in dairy production systems, methane (CH4) and carbon dioxide (CO2) play significant roles in global warming. The objective of this research was to evaluate the spatial variability of CH4 (ppm) and CO2 (ppm) concentrations, as well as environmental variables (dry bulb temperature, tdb, °C, and relative humidity, RH, %), in a compost barn dairy production system. For gas concentration monitoring, an electrochemical sensor was used for CH4 and a non–dispersive infrared (NDIR) sensor for CO2. For the environmental variables, a Hobo® MX2301A datalogger was used, and both pieces of equipment were attached to a remotely piloted aircraft (RPA), the DJI Matrice 350. Measurements were carried out over three days, with flights conducted over the facility's roof. The data obtained were analysed using geostatistics to characterise spatial variability of the GHG. A strong spatial dependence was observed in gas concentrations and environmental variables. The highest concentrations of CH4 (129–134.4 ppm) and CO2 (434–479 ppm) were recorded on the first day. Tdb ranged between 24.2 °C and 32 °C, while RH fluctuated between 38.8% and 68%. The use of RPA proved to be an efficient tool for GHG monitoring, allowing the identification of spatial distribution patterns. This technology provides a novel approach to measuring GHG emissions, addressing the environmental challenges of the agricultural sector.