Parkin and Owen (1986) report the following parameter values for anaerobic digestion of primary treatment sludge: Ks = half-saturation constant = 1.8 (1.112(T-35)) [g COD/L]; μmax = maximum specific growth rate = 0.27 (1.035(T-35)) [day ¹]; k = maximum specific substrate use rate = 6.67 (1.035(-35)) [day ¹]; Ke endogenous respiration rate = 0.03 (1.035(-35)) [day¹]; = Y = cell yield = 0.04 [g VSS/g COD]; T = temperature [°C] If the sludge flow rate into the tank were doubled and simultaneously the temperature dropped from 35°C to 20°C, by what ratio would the factor of safety decrease?
Parkin and Owen (1986) report the following parameter values for anaerobic digestion of primary treatment sludge: Ks = half-saturation constant = 1.8 (1.112(T-35)) [g COD/L]; μmax = maximum specific growth rate = 0.27 (1.035(T-35)) [day ¹]; k = maximum specific substrate use rate = 6.67 (1.035(-35)) [day ¹]; Ke endogenous respiration rate = 0.03 (1.035(-35)) [day¹]; = Y = cell yield = 0.04 [g VSS/g COD]; T = temperature [°C] If the sludge flow rate into the tank were doubled and simultaneously the temperature dropped from 35°C to 20°C, by what ratio would the factor of safety decrease?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![Parkin and Owen (1986) report the following parameter values for
anaerobic digestion of primary treatment sludge:
Ks = half-saturation constant = 1.8 (1.112(T-35)) [g COD/L];
μmax = maximum specific growth rate = 0.27 (1.035(T-35)) [day ¹];
k = maximum specific substrate use rate = 6.67 (1.035(-35)) [day ¹];
ke = endogenous respiration rate = 0.03 (1.035 (T-35)) [day¹];
Y = cell yield = 0.04 [g VSS/g COD];
T = temperature [°C]
If the sludge flow rate into the tank were doubled and simultaneously the
temperature dropped from 35°C to 20°C, by what ratio would the factor of
safety decrease?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F28b6003d-0204-46eb-90bf-e25d034fc92a%2Fd1415a85-ecea-492f-8cc2-507778ff9c16%2Fs6g28bj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Parkin and Owen (1986) report the following parameter values for
anaerobic digestion of primary treatment sludge:
Ks = half-saturation constant = 1.8 (1.112(T-35)) [g COD/L];
μmax = maximum specific growth rate = 0.27 (1.035(T-35)) [day ¹];
k = maximum specific substrate use rate = 6.67 (1.035(-35)) [day ¹];
ke = endogenous respiration rate = 0.03 (1.035 (T-35)) [day¹];
Y = cell yield = 0.04 [g VSS/g COD];
T = temperature [°C]
If the sludge flow rate into the tank were doubled and simultaneously the
temperature dropped from 35°C to 20°C, by what ratio would the factor of
safety decrease?
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