Translations:Wasseraufbereitung und Grauwassernutzung/885/en
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In small wastewater treatment systems, a surface load of <0.004 kg BOD5/m²/day should be maintained to ensure proper operation with a factor of safety. Based on this and since the COD content is on average twice the BOD content, the COD surface loading can be assumed to be 0.008 kg COD/m²/day.