This preview shows page 1. Sign up to view the full content.
Unformatted text preview: - 20C= 0.05/d (1.06)10C - 20C= 0.03/d
At 17C -> Determine Ө Ө = 2.26 days
Assume residence time does change
At 10C Therefore the max effluent concentration will be exceeded.
3.) An aerated lagoon with a volume of 18,000 m3 is treating a wastewater with the following
Q = 2000 m3/day
TSS = 150 mg/L
VSS = 100 mg/L
nbVSS = 50 mg/L
bCOD = 200 mg/L
The following biokinetic coefficients apply for the design conditions:
k = 5 d-1 Ks = 35 mg bCOD/L Y = 0.4 mg VSS/mg bCOD kd = 0.08 d-1
fd = 0.15 mg VSS/mg VSS Estimate the following parameters:
Concentration of viable biomass (as VSS) in the aeration basin effluent
Ө = V/Q = 18000m3/2000m3/d = 9d ii.) Concentration of growth-related VSS in the basin effluent Solution:
Growth related biomass = Viable biomass + endogenous decay products
XgrowthVSS = (1 + fdKd)Xm...
View Full Document
- Fall '14
- Environmental Engineering