Avaliação da disposição de biossólido oriundo da ETE Araraquara (SP) em argissolo vermelho
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Data
2013-04-26
Autores
Brito, Ana Paula Ferreira de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
A grande demanda e o crescente desenvolvimento urbano tem intensificado o esgotamento dos recursos naturais no mundo. Surge com a premissa de criar ambientes permanentes, “a permacultura”, uma ferramenta da agricultura a qual se criam zonas de ambientes equilibradamente produtivos com caráter sustentável. De acordo com técnicas de aproveitamento de resíduos para a agricultura, ao se pensar na questão urbana, as ETE (Estações de Tratamento de Esgoto), tratam as águas residuais e neste processo acumula nas unidades de tratamento, um lodo, cuja disposição final geralmente é problemática. Assim, são necessários estudos sobre a utilização do lodo em sistemas recicláveis, e como alternativa viável seu uso na agricultura. Dentro dos estudos realizados acerca dos impactos físicos, químicos e biológicos que este lodo pode causar ao ambiente, este trabalho teve por objetivo avaliar a aplicação do lodo da ETE de Araraquara, em Argissolo Vermelho (PV). Para isso foram construídos lisímetros com o solo e aplicadas 2 doses de lodo denominados L5 com 500 g de sólidos totais/m2 e L15 com 1500 g de sólidos totais/m2. Ao longo de 89 dias foram realizados 4 aplicações acumulativas de lodo. Os lisímetros ficaram expostos à temperatura e a chuva ambiente. Durante os dias de chuva, foram coletadas amostras de água percolada e estas foram submetidas a análises em ICP-OES (Espectrometria de Emissão Óptica com Plasma Indutivamente Acoplado), para metais. Também foram realizados testes microbiológicos para um indicador biológico nas águas percoladas. Durante o tratamento, sementes remanescentes na camada superficial do solo, germinaram espécie denominada Brachiaria Decumbens, e análises químicas em ICP-OES foram realizadas em suas folhas. Observou-se que ao longo dos 89 dias, houve ausência de E. coli e coliformes totais...
The high demand and increasing urban development has intensified the depletion of natural resources in the world. Arises from the premise of create permanent environments, permaculture, an agricultural tool which are created zones balanced productive environments with sustainable character. Accordance with use of residues techniques for agriculture, when thinking about urban issues, the STS (Sewage Treatment Station), treat the wastewater and in the process accumulate in treatment units, one sludge, whose final disposition is generally problematic. Thus, studies are needed on usage of this sludge in recyclable systems, and how alternative viable their use in agriculture. Within these studies are the physical, chemical and biological impacts this sludge may cause to the environment, this study aimed to evaluate application of the sewage sludge of Araraquara, in PV - Paleudalf. For this tanks were constructed (lysimeters) with the soil applied and two doses of sludge called L5 with 500 g of solids total/m2 and L15 with 1500 g of solid total/m2. For 89 days four accumulative applications of sludge were performed. The tanks were exposed to environmental temperature and rainfall. During the rainy days, water samples were collected and percolated and they were subjected to ICP-OES (inductively coupled plasma optical emission spectroscopy) analyzes for metals. Microbiological tests were also performed on the percolated waters for a biological indicator. During treatment, seeds remaining in the surface layer of the soil, germinated species called Brachiaria decumbens, and chemical analyzes in ICP-OES were performed on their leaves. It was observed that over the 89 days, there were no E. coli and total coliforms in percolated water. For analysis of metals in waters held in ICP-OES, the test was reliable, and their concentrations in percolated... (Complete abstract click electronic access below)
The high demand and increasing urban development has intensified the depletion of natural resources in the world. Arises from the premise of create permanent environments, permaculture, an agricultural tool which are created zones balanced productive environments with sustainable character. Accordance with use of residues techniques for agriculture, when thinking about urban issues, the STS (Sewage Treatment Station), treat the wastewater and in the process accumulate in treatment units, one sludge, whose final disposition is generally problematic. Thus, studies are needed on usage of this sludge in recyclable systems, and how alternative viable their use in agriculture. Within these studies are the physical, chemical and biological impacts this sludge may cause to the environment, this study aimed to evaluate application of the sewage sludge of Araraquara, in PV - Paleudalf. For this tanks were constructed (lysimeters) with the soil applied and two doses of sludge called L5 with 500 g of solids total/m2 and L15 with 1500 g of solid total/m2. For 89 days four accumulative applications of sludge were performed. The tanks were exposed to environmental temperature and rainfall. During the rainy days, water samples were collected and percolated and they were subjected to ICP-OES (inductively coupled plasma optical emission spectroscopy) analyzes for metals. Microbiological tests were also performed on the percolated waters for a biological indicator. During treatment, seeds remaining in the surface layer of the soil, germinated species called Brachiaria decumbens, and chemical analyzes in ICP-OES were performed on their leaves. It was observed that over the 89 days, there were no E. coli and total coliforms in percolated water. For analysis of metals in waters held in ICP-OES, the test was reliable, and their concentrations in percolated... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Waste products, Resíduos, Sustentabilidade, Águas residuais - Purificação, Lodo de esgoto, Lisimetro, Permacultura, Araraquara (SP)
Como citar
BRITO, Ana Paula Ferreira de. Avaliação da disposição de biossólido oriundo da ETE Araraquara (SP) em argissolo vermelho. 2013. 95 f. Dissertação - (mestrado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Instituto de Geociências e Ciências Exatas de Rio Claro, 2013.