Typical deoxygenation constants
Type of water kd [at 20oC]
(day-1)
Untreated wastewater 0.35-0.70
Treated wastewater 0.10-0.35
Polluted river 0.10-0.25
Unpolluted river < 0.05
Source:  Chin, D. A. 2006. Water-quality engineering in natural systems, Wiley.