
EBK ELEMENTARY SURVEYING
15th Edition
ISBN: 8220106714225
Author: GHILANI
Publisher: PEARSON
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Chapter 20, Problem 20.15P
To determine
The scale factor for the station in the North zone of Pennsylvania.
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Q1: Design of trickling filter system single-stage with 3m depth, effluent BOD, of
20 mg/l, influent BODs =250mg/l, flow = 2.63 m³/min and hydraulic flow rate or
hydraulic loading rate 25 m/day, r=3
04
Q4
A waste effluent of 1.25 m/s with BOD, 183 mg/L, DO=0 mg/L and T
= 20 °C is to be discharged into a river of 8 m³/s flow, BOD, = 2mg/L, DO
-9.14 mg/L and T= 15 °C. At 20 °C, (K₁) is 0.3/day and (K2) is 0.9/day.
The average velocity of the river is 0.8 m/s. 1) Is DO min within the
environmental limitations? 2) At what distance is the maximum deficit
located. 3) Draw the oxygen sag curve? Given the saturation concentration
at 15 °C and at mixed temperature = 10.15 mg/L
Calculate 1- the effluent BOD, of a two-stage trickling filter with the
following flows, BOD, and dimensions? Q-5000 m³/day, influent
BOD,-280 mg/L, volume of first filter-1000 m³, volume of second
filter-800 m³, filter depth-2 m, r₁=1, z=1.25. Also, 2- calculate organic
loading rate (BOD, kg/day) 3- Hydraulic loading (m³/m²/d), 4- efficiency
of each stage 5- overall removal efficiency.
Chapter 20 Solutions
EBK ELEMENTARY SURVEYING
Ch. 20 - Prob. 20.1PCh. 20 - What are developable surfaces?Ch. 20 - Prob. 20.3PCh. 20 - Prob. 20.4PCh. 20 - Prob. 20.5PCh. 20 - Prob. 20.6PCh. 20 - Prob. 20.7PCh. 20 - Prob. 20.8PCh. 20 - Prob. 20.9PCh. 20 - Prob. 20.10P
Ch. 20 - Prob. 20.11PCh. 20 - Prob. 20.12PCh. 20 - Prob. 20.13PCh. 20 - Prob. 20.14PCh. 20 - Prob. 20.15PCh. 20 - Prob. 20.16PCh. 20 - Prob. 20.19PCh. 20 - Prob. 20.20PCh. 20 - Prob. 20.21PCh. 20 - Prob. 20.22PCh. 20 - Prob. 20.23PCh. 20 - Prob. 20.24PCh. 20 - Prob. 20.27PCh. 20 - Prob. 20.28PCh. 20 - Prob. 20.29PCh. 20 - Prob. 20.30PCh. 20 - Prob. 20.31PCh. 20 - Prob. 20.32PCh. 20 - Prob. 20.33PCh. 20 - Prob. 20.34PCh. 20 - Prob. 20.35PCh. 20 - Prob. 20.36PCh. 20 - Prob. 20.37PCh. 20 - Prob. 20.39PCh. 20 - Prob. 20.40PCh. 20 - Prob. 20.41PCh. 20 - Prob. 20.42PCh. 20 - Prob. 20.43PCh. 20 - Prob. 20.44PCh. 20 - Prob. 20.45PCh. 20 - Prob. 20.46P
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