ESTGV - DA - Capítulo em obra internacional, como autor
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- Risk assessment of reusing treated water from the Viseu Sul WWTP for irrigation and similar usesPublication . Santos, Lenise; Ferreira, José; Silva, Maria; Simões, Luis; Ferreira, Miguel; Brás, IsabelDue to the growing water scarcity, the reuse of treated wastewater arises as a possibility for sustainable water management. However, it is necessary to evaluate the possible risks associated with its activity. This study aims to develop a risk assessment of water for reuse, in terms of public health and water resources, for production and internal use by the Viseu Sul Wastewater Treatment Plant (WWTP) and external use in irrigation of green spaces in Viseu. The methodology used was a semi-quantitative risk assessment. The results demonstrated the viability of the production and use of Reused Water by the Viseu Sul WWTP, with an overall risk to public health of 0.68, and for use in irrigating green spaces in Viseu, with an overall risk of 0.75. The overall risk to water resources was 2.33 for nitrogen and phosphorus and 0.78 for E. coli. All risks were considered insignificant, considering the criteria defined by the method. Based on the information presented, it can be inferred that the use of treated wastewater to meet Viseu's water needs is a viable option.
- Particleboard Production from Paulownia tomentosa (Thunb.) Steud. Grown in Portugal.Publication . Esteves, Bruno; Aires, Pedro; Sen, U; Gomes, Maria da Glória; Guiné, Raquel; Domingos, Idalina; Ferreira, José; Viana, Helder Filipe dos Santos; Lopes, Luísa P. Cruz
- Local waste agroforestry managment - biomass to energy analysis with LCAPublication . Brás, Isabel; Ferreira Silva, Maria Elisabete; Ferreira, José; Raimondo, Roberta; Saetta, Rafaella; Fabricino, MassimilainoTo enable the protection of forests against rural fires are foreseen a set of measures for plan-ning and intervention, reduction their risk and impacts. Forest residues collecting centers are being created in Portugal, to reduce undesired thermal charge in nature and for biomass further valorization. Keeping this in mind, one of the strategies is the energy recovery from these residues in bi-omass power plants that were built in strategic locations. The biomass is mostly natural residu-al forest, agricultural and garden wood and green materials The present work aims to study its environmental impact. The Life Cycle Assessment methodology, using SimaPro 9.3.0.3 PhD software, was applied to identify the burden of this process and the environmental categories most relevantly affect-ed. Data achieved showed the importance of the valorization of residual biomass for energy production, reduction the impact categories of abiotic depletion due to fossil fuels, global warming, human toxicity and eutrophication.
- Anaerobic digestion sludge compsoting - assessment of the star-up processPublication . Silva, Maria Elisabete; Araújo, Sara; Brás, Isabel; Cunha-Queda, Ana Cristina; Nunes, Olga Cristina; Lobo, G.; Cordeiro, A.; Faria, M.The aim of this work was to follow the start-up of the composting process of sludge from the anaerobic digestion of municipal solid waste and to assess the quality of the final product. The temperature profile and dry matter content was registered over 10 weeks. The composting process was monitored by standard physical and chemical parameters and the quality of the final compost was assessed by phytotoxicity and stability assays. The low average temperature values registered during composting suggest over aeration. In addition, all the standard physical and chemical parameters analysed showed slight variations over composting, suggesting that the anaerobic digestion sludge was already a stable raw material. The final compost was not phytotoxic and was stable, but contained some inert materials. Overall, the final compost had quality compatible to be used as soil amendment. Nevertheless, the operational conditions optimization should be carried out to improve its quality.
- Irrigation with Treated Wastewater: Potential Impacts on Microbial Function and Diversity in Agricultural SoilsPublication . Lopes, Ana Rita; Becerra-Castro, Cristina; Vaz-Moreira, Ivone; Silva, Elisabete; Nunes, Olga; Manaia, CéliaThe reuse of treated wastewater could be a promising measure to attenuate the water scarcity burden. In agriculture, irrigation with wastewater may contribute to improve production yields, reduce the ecological footprint and promote socioeconomic benefits. However, it cannot be considered exempt of adverse consequences in environmental and human health. Apart from the introduction of some biological and chemical hazardous agents, the disturbance of the indigenous soil microbial communities and, thus, of vital soil functions impacting soil fertility may occur. The consequences of these disturbances are still poorly understood. This chapter summarises the physicochemical and microbiological alterations in soil resultant from irrigation with treated wastewater that are described in scientific literature. These alterations, which involve a high complexity of variables (soil, wastewater, climate, vegetal cover), may have impacts on soil quality and productivity. In addition, possible health risks may arise, in particular through the direct or indirect contamination of the food chain with micropollutants, pathogens or antibiotic resistance determinants. The current state of the art suggests that irrigation with treated wastewater may have a multitude of long-term implications on soil productivity and public health. Although further research is needed, it seems evident that the analysis of risks associated with irrigation with treated wastewater must take into account not only the quality of water, but other aspects as diverse as soil microbiota, soil type or the cultivated plant species.