Oxygen sag curve

OXSAC - Classic Streeter-Phelps Oxygen Sag Curves... 

Fig. 2 Typical oxygen sag curve. Reaeration occurs after the BOD is consumed.

Continuous Multicomponent Distillation Column 501 Gas Separation by Membrane Permeation 475 Transport of Heavy Metals in Water and Sediment 565 Residence Time Distribution Studies 381 Nitrification in a Fluidised Bed Reactor 547 Conversion of Nitrobenzene to Aniline 329 Non-Ideal Stirred-Tank Reactor 374 Oscillating Tank Reactor Behaviour 290 Oxidation Reaction in an Aerated Tank 250 Classic Streeter-Phelps Oxygen Sag Curves 569 Auto-Refrigerated Reactor 295 Batch Reactor of Luyben 253 Reversible Reaction with Temperature Effects 305 Reversible Reaction with Variable Heat Capacities 299 Reaction with Integrated Extraction of Inhibitory Product 280... 

Fig. 3.41. Oxygen curves. 1 — deoxygenation, 2 — re-aeration, 3 — oxygen sag curve. Do — initial deficiency, Dcr — critical deficiency, Dt — deficiency in the time 1, C — concentration of dissolved oxygen in the time t, K — critical point, F — inflexion point... 

FIGURE 4.4 Oxygen sag curve resulting from the addition of oxidizable pollutant material to a stream. 

Figure 2.14 shows fhe oxygen disfribufion—the so-called "oxygen sag curve" — that results in a river downstream from a steady inflow of pollutant. 

We can make an estimate of how much higher the actual air requirements would be by drawing on the Streeter-Phelps oxygen sag curve referred to in Practice Problem 2.4. The equation for that curve is given by... 

The addition of oxidizable pollutants to streams produces a t5q)ical ojg gen sag curve as shown in Figure 12.3. Initially, a well-aerated, unpolluted stream is relatively free of oxidizable material the oxygen level is high and the bacterial... 

---