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O impacto das estações de tratamento de águas residuais no ambiente
Paperback
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ISBN10: 620832727X
ISBN13: 9786208327279
Publisher: Edicoes Nosso Conhecimento
Published: Nov 29 2024
Pages: 76
Weight: 0.27
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208327279
Publisher: Edicoes Nosso Conhecimento
Published: Nov 29 2024
Pages: 76
Weight: 0.27
Height: 0.18 Width: 6.00 Depth: 9.00
Language: Portuguese
A nÃvel mundial, são recolhidos anualmente mais de 368 quilómetros cúbicos de águas residuais. Apenas 160 quilómetros cúbicos são tratados antes de serem eliminados no ambiente natural e 7,1 quilómetros cúbicos são reutilizados. Até 2015, a capacidade mundial de reutilização de águas residuais tratadas atingirá 20 quilómetros cúbicos por ano. Devido à falta de vontade dos consumidores e a necessidades importantes relacionadas com determinadas actividades, a água resultante das estações de tratamento é geralmente utilizada pelas indústrias e para a agricultura e paisagismo. Nos paÃses em vias de desenvolvimento e nos paÃses desenvolvidos, a rápida urbanização e a consequente procura crescente de água potável e industrial exigem projectos dispendiosos e de grande envergadura. A escassez de água doce constitui um grave problema na região mediterrânica e, em particular, nas zonas áridas e semi-áridas do Sul e do Médio Oriente, e está a dar origem a graves problemas paralelos de efluentes. Estes problemas são tratados com maior ou menor sucesso em função da capacidade de desenvolver estratégias de tratamento de águas residuais eficazes, racionais e económicas.
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