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Por que a água residual tratada nos tanques de desinfecção dos hospitais fica escura, como se fosse petróleo, mas o teor de cloro residual ainda está dentro dos limites aceitáveis?

2016-01-05View Original

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Por que a água residual tratada nos tanques de desinfecção dos hospitais fica escura, como se fosse petróleo, mas o teor de cloro residual ainda está dentro dos limites aceitáveis?
Reply #22016-01-06
O COD é alto, devido à fermentação de substâncias orgânicas.

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