Andmebaasi logo

Sirvi Autor "da Silva, L.D.B." järgi

Nüüd näidatakse 1 - 2 2
  • 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
    Construction, calibration and evaluation of mini-lysimeters in the management of irrigation in a protected environment
    (Estonian University of Life Sciences, 2025) Matos, M.L.; Lyra, G.B.; Cecchin, D.; Hüther, C.M.; Francisco, J.P.; Jorge, M.F.; Pereira, C.R.; Hamacher, L.S.; da Silva, L.D.B.
    The production of forest seedlings requires controlled environments and specific practices, highlighting the need for rational irrigation management. Historically, excessive irrigation has compromised seedling quality, underscoring the importance of developing technologies and research focused on water use efficiency in nurseries. Thus, technologies that are more financially accessible to producers contribute not only to cultivation but also to the social inclusion of these producers in broader markets. Mini-lysimeters can be effectively used to monitor the water balance in potted and tray-grown plant production, thereby reducing water waste in forest nurseries. In this study, portable electronic weighing mini-lysimeters were constructed for greenhouse evapotranspiration research using load cells (capacity: 20 kg), as sensor elements, and dataloggers for data acquisition. Calibration curves were established by correlationg standard weights and voltage readings, and were analyzed using regression analysis. The coefficient of determination (𝑟𝑟2) and the standard error of estimation (SEE) were used to evaluate model accuracy. Under field conditions, the lysimeters’ performance was assessed using the correlation coefficient (r); Willmott's index (d); performance index (c) and SEE, with pine and eucalyptus seedlings. The calibration curves were well described by linear models, with 𝑟𝑟2 values exceeding 0.994. The highest SEE (2.44 g), observedin mini-lysimeter III, remained below the 4 g detection threshold of the load cell. All performance indicators (r, d, and c) were above 0.999, with SEE values ranging from 6.2 to 36.2 g (less than 1 g per tube), demonstrating that the mini-lysimeters are suitable for monitoring daily evapotranspiration.