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What is SOUR/DOUR?

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What is SOUR/DOUR?

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• SOUR = Specific Oxygen Uptake Rate indicates biological activity of microbes in the wastewater treatment process and the load placed on them. SOUR is the relationship between oxygen uptake and the amount of solids. This calculation is required to comply with US 503. SOUR = DOUR/solids wt = mg/hr/g • DOUR = Dissolved Oxygen Uptake Rate indicates biological activity of microbes in the wastewater treatment process. It is the calculation of oxygen uptake (how quickly the microbes are using the oxygen). This calculation is required to comply with US 503.

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