DESEMPENHO DE PLANTAS AQUÁTICAS NA MINIMIZAÇÃO DA CARGA POLUENTE DE DEJETOS LÍQUIDOS DE SUINOCULTURA
The expansion of swine activity has provided an increase in the volume of waste, and its disposal without a treatment leads to problems of contamination of soil and surface water and groundwater. Aquatic plants are one of the alternatives that can be used in the treatment of these effluents. The obj...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Brasil |
| Institución: | Universidade do Oeste Paulista (UNOESTE) |
| Repositorio: | Biblioteca Digital de Teses e Dissertações da UNOESTE |
| Idioma: | portugués |
| OAI Identifier: | oai:bdtd.unoeste.br:jspui/1024 |
| Acceso en línea: | http://bdtd.unoeste.br:8080/jspui/handle/jspui/1024 |
| Access Level: | acceso abierto |
| Palabra clave: | Fitorremediação. Macrófitas aquáticas. Efluente. Manejo ambiental. Phytoremediation. Aquatic macrophytes. Wastewater. Environmental management. OUTROS::CIENCIAS |
| Sumario: | The expansion of swine activity has provided an increase in the volume of waste, and its disposal without a treatment leads to problems of contamination of soil and surface water and groundwater. Aquatic plants are one of the alternatives that can be used in the treatment of these effluents. The objective of this study was to evaluate the potential of aquatic plants (Eichhornia crassipes), water lettuce (Pistia stratiotes) and salvinia (Salvinia auriculata) in improving the chemical and physicochemical characteristics of liquid swine manure (DLS). The experiment was conducted in an open environment in Campus II/UNOESTE. For the composition of the treatments was used liquid swine manure (DLS) of the zootechnical center diluted in water, being distributed in 16 boxes (0,32 m³) of PVC and characterized as: T1 = Witness - only 50% DLS; T2 = 50% DLS + E. crassipes; T3 = 50% DLS + P. stratiotes; T4 = 50% DLS + S. auriculata. In each treatment small, visually similar plants were inserted. The experiment was structured in a randomized complete block design (DBC), with four treatments, in subdivided plots, with four replications. Effluent samplings were performed weekly in the months of Oct/Nov/Dec 2015 and Mar/Apr/May/Jun/Aug/Sep 2016, and a sample of each treatment and repetition was collected, totaling 16 samples per week. In the effluent, the parameters were: electrical conductivity (EC), pH, dissolved oxygen (OD), turbidity, chemical and biochemical oxygen demand (COD e BOD), ammonium (N-NH4+), nitrate (N-NO3-) and total phosphorus (P total). The N-NH3 volatilization rates of the system were also evaluated. To obtain the content of the elements in the plant tissue, the plants were collected monthly and submitted to chemical analysis of the elements: N-NH4+, N-NO3-, P total, as well as the determination of total biomass of dry matter (BMS) of plants. The results were submitted to analysis of variance and to the comparison test of Tukey averages at the 5% probability level. The results obtained indicate that the E. crassipes provided a higher reduction of EC, turbidity, COD, BOD, NH4+ and P total of the effluent, lower NH3 volatilization, as well as the higher total P content present in its plant tissue and The highest production of BMS. P. stratiotes followed by E. crassipes showed higher NH4+ content in their plant tissues. Therefore, among the macrophytes studied, E. crassipes stands out as the most profitable in the cleaning of liquid swine manure. |
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