8.4. A free water surface constructed wetland is to be designed to reduce the TP concentration from 1 mg/L in the influent to 0.1 mg/L in the effluent. The influent flow rate is 2700 L/min, ET is 900 mm/ yr, the transpiration fraction is 0.6, infiltration is negligible, and rainfall is 1500 mm/yr. It is anticipated that the TP background concentration in the wetland is 0.04 mg/L, the temperature of the water is 20"C, the areal rate coefficient is 18 m/yr, and that the wetland can be designed as a 1-tank system.
Determine the area (ha)of the wetland that is required.
Given that:
the influent flow rate=2700 L/min
ET=900 mm/year
the transpiration fraction=0.6
rainfall=1500 mm/year
TP background concentration in the wetland=0.04 mg/L
temparature of the water=20"c
areal rate coefficient=18 m/year
8.4. A free water surface constructed wetland is to be designed to reduce the TP concentration...
A FWS constructed wetland is being designed to polish grey water from a school building in Indiana. The grey water characteristics are 80 mg/L BOD, 20 mg/L TSS and 10 mg/L nitrogen (as ammonia nitrogen). They would like their constructed wetland to reduce their BOD to 15 mg/L before the water exits the wetland. No treatment objectives are required for TSS, nitrogen or pathogens in the wetland. Decaying plant matter provides a background BOD concentration (C*) of 7 mg/L. Assume...
3. A FWS constructed wetland is being designed to polish grey water from a school building in Indiana. The grey water characteristics are 80 mg/L BOD, 20 mg/L TSS and 10 mg/L nitrogen (as ammonia nitrogen). They would like their constructed wetland to reduce their BOD to 15 mg/L before the water exits the wetland. No treatment objectives are required for TSS, nitrogen or pathogens in the wetland. Decaying plant matter provides a background BOD concentration (C*) of 7 mg/L....
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