Hello, I have researched ...

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Hello, I have researched Brazilian Laws on COD, and for pulp and mill it is allow up to 300 mg/l regarding this parameter. This legislation comes from Parana State as proposal, but I guess the national records are not so different ( http://www.mma.gov.br/port/conama/processos/EFABF603/Prop.ResolGOV_PR_2oGTLancamentoEfluentes_17e18nov08.pdf). I conclude that it is risky to allow 800 mg/l. Also, you should look at other compounds employed in production process that can improve COD and analyse them together. Best regards.