TCC - Engenharia Agrícola e Ambiental (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/430
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Resultados da Pesquisa
Item Produção de bioestruvita como estratégia de recuperação de fósforo a partir de águas residuárias(2023-09-13) Silva, Vanessa Andrade da; Barboza, Marianne de Lima; Fernandes, Bruna Soares; http://lattes.cnpq.br/5781583265737346; http://lattes.cnpq.br/8665242735385886; http://lattes.cnpq.br/0284174185527451The precipitation of struvite (MgNH4PO4•6H2O) is an environmental technology aimed at addressing the issues of eutrophication in water bodies. Furthermore, it enables the recovery of phosphorus and nitrogen to be used as fertilizer, potentially contributing to the demands of the agricultural sector. Its biological production is considered promising, as it proves to be more sustainable than physicochemical production. In this manner, the production of biostruvite by B. pumilus was assessed in synthetic media derived from two effluents: residual water from potato processing, post-anaerobic treatment, and hydrolyzed human urine. The assays were monitored over 0, 3, 5, 7, and 10 days, maintained at 30°C under agitation at 100 rpm. The crystals were characterized through scanning electron microscopy analysis, accompanied by energy-dispersive X ray spectroscopy and X ray diffraction. Incubation of synthetic urine yielded the highest microbial performance, resulting in the removal of 98% of acetate and 86% of phosphate, likely favored by the higher substrate concentration compared to the synthetic potato effluent. Crystals from both media exhibited quality characteristics compatible with their application as inorganic fertilizers. It was concluded that, based on the absence of precipitates in abiotic tests and pH values below 8.4 in the reactors, the struvite crystals are of biological nature.Item Atividade microbiana de um solo sob cobertura morta e cultivado com forrageiras irrigadas com água de reuso(2022-08-29) Barros, Danilo José de; Lira Junior, Mario de Andrade; Fracetto, Felipe José Cury; http://lattes.cnpq.br/8645174138041143; http://lattes.cnpq.br/7272749911485530; http://lattes.cnpq.br/1685882434827642The United Nations estimates that the population will be 9.7 billion inhabitants in the next 30 years, demanding an increase in food production. A strategy to increase this demand and reduce environmental impact is the use of wastewater for irrigation in association with mulch, which can bring benefits to the soil microbiota, greater availability of nutrients and agricultural productivity. The objective of this work was to evaluate the abundance and microbial activity in soils cultivated with forage cactus, irrigated with sewage wastewater and with mulch. The experiment was at the Parnamirim Production Unit - PE, using reused water from the sewage treatment plant for irrigation of forage cactus consorted with buffel grass and sudan sorghum. The forage cactus was implanted in double rows 0.5m x 0.5m x 2.0 m, with the cultures intercalated between the double rows, with the experimental unit formed by three double rows of 4 m in length each. Four replications were used in the design in randomized blocks, in factorial arrangement 2 (intercropping with sudan sorghum and buffel grass) x 4 covers (no cover, 8 and 12 tons of corn straw per hectare and natural vegetation). We evaluated soil basal respiration, carbon and nitrogen from soil microbial biomass and metabolic quotient, at 0-10 and 10-20 cm layers. There was no significant difference in soil basal respiration, microbial nitrogen, and metabolic quotient at 0-10 and 10-20 layers. Estimating carbon from microbial biomass at 0-10 cm layer, we observed a significant difference between the intercrops without vegetation cover, however at 10-20 with buffel grass, the 8 tons mulch differed from the other treatments. Even so, further research is necessary to observe these variables over a longer period.Item Diversidade de nematoides em relação a diferentes águas residuárias(2018) Figuerêdo, Djayana Karla Cavalcanti de; Pedrosa, Elvira Maria Regis; http://lattes.cnpq.br/8905353478054504; http://lattes.cnpq.br/3031756841455608Item Atividades desenvolvidas em um sistema de tratamento de efluentes para águas residuárias de um hotel em Ipojuca-PE(2018) Ribeiro, Marco Aurélio; Almeida, Gledson Luiz Pontes de; http://lattes.cnpq.br/2328849810614673; http://lattes.cnpq.br/8312277001105388