Fundamentals of Geotechnical Engineering (MindTap Course List)
Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 8, Problem 8.16P
To determine

Find the maximum depth of cut, H, that can be made in the clay.

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Secondary Treatment Based on a plant flow rate of 40 mgd, design an activated sludge, secondary treatment system with recycle which maintains a MLVSS = 2,000 mg/L in the aeration reactor and has an average Solids Retention Time (SRT) = 4 days. The biota kinetic constants are: Kinetic Coefficients for the Activated-sludge Process for the Removal of Organic Matter from Domestic Wastewater - Endogenous Decay Coefficient – k(d) Half-velocity constant – K(s) 0.1 15 Max. Specific Substrate Utilization Rate – k Biomass Yield - Y 6 0.45 gVSS/gVSS-day mg/L bsCOD g bsCOD/gVSS-day gVSS/g bsCOD used The laboratory has provided the information below for your influent from your primary clarifier. Unit mg/L Item Influent nbVSS - Xo Quantity 30 Fraction of the biomass which remains as cell debris (fd) Temperature 0.18 20 °C Quantity of Oxygen in air 0.017 Lb O₂/ft³ air Influent microorganism & substrate concentration as (So) Influent Inert Inorganics (TSS. – VSS.) 215 10 Mg/L bsCOD mg/L Aeration Basin…
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