4. Rural facultative pond with a winter flow of 6000 m3/d where the influent has a BOD concentration of 90 g/m^3. The reaction rate is given by Kc(T)=0.3x1.135^(T-20). Assuming completely mixed, use Marias & Shaw equation to determine the pond volume to produce an effluent of 15 mg/l/
4. Rural facultative pond with a winter flow of 6000 m3/d where the influent has a BOD concentration of 90 g/m^3. The reaction rate is given by Kc(T)=0.3x1.135^(T-20). Assuming completely mixed, use M...
A wastewater flow of 18,000 m3/day is to be treated in a completely mixed activated sludge system at a concentration of 3000 mg/L MLSS (mixed liquor suspended solids). The secondary clarifier is designed to thicken the sludge to 12,000 mg/L. Assuming a growth yield coefficient of 0.5 Kg/Kg, an influent BOD of 100 mg/L with a residence time of 8 days, determine the following: a) The volume of the reactor b) The mass of the solids and the wet volume...
3. Determine the aeration tank volume (mgd), excess biomass in the waste sludge (kg/d), and the BOD f a completely mixed activated-sludge process by assuming the following: k 4.0 day r-0.55 lb vSS/1b BOD, K, 80 mg/l, ks-0.05 day', wastewater flow rate 2.5 mgd, soluble effluent BOD- 15 mgl, soluble influent BOD - 170 mgl, and MLVSS-2200 mg/l, and mean cell residence time -6 days. (15 pts)
3. Determine the aeration tank volume (mgd), excess biomass in the waste sludge...