Answered: Taking 5400 Lpcd for fresh and saline…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Calculate the distribution storage needed for equalization storage based on the following peak hourly data shown below for the maximum day: (Complete the table and plot Cumulative data) Time Peak Peak Cumulative Time Peak Peak Cumulative Hourly Hourly Demand Hourly Hourly Demand (L/min) Demand (Liters) (L/min) Demand (Liters) (Liters) (Liters) 12 am O 12 pm 6300 -23456702= 2200 6400 2100 2 6400 2000 3 6300 2000 4 6300 2000 5 6600 2100 6 7300 3600 7 9300 5200 8 8300 5600 9 5000 ΤΟ 5900 10 2600 6000 | | 2500 12 2300
Calculate the 5-day BOD of a domestic waste water based on the following data: volume of waste water added to 300 ml bottle = 6.0 ml, initial DO = 8.1 mg/l, and 5-day DO = 4.2 mg/l. What is the ultimate BOD assuming a k-rate of 0.1 per day?
ENVIRONMENTAL ENGINEERING-WATER POLLUTION: Incoming wastewater, with BOD5 equal to 200mg/L, is treated in a well-run secondary treatment plant that removes 90% of the BOD. You are to run a five-day BOD test with a standard 300mL bottle, using a mixture of treated sewage and dilution water (no seed). Assume the initial DO is 9.2 mg/L. FIND: Roughly what maximum volume of treated wastewater should be put into the bottle in you want to have at least 2.0 mg/L of DO at the end of the test (filling the rest of the bottle with water)? If you make a mixture of half water and half treated wastewater, what DO would you expect after five day?
10. Compute BOD5.20 if BoD1-25 = 95 mg/L for a waste water sample?
Coming home after the end of the winter semester, you find that your family’s swimming pool has not be maintained well. In particular, it has no chlorine residual at all, and it is full of tree leaves. You buy a concentrated chlorine solution (1% as Cl2) and begin to meter it into the pool at a rate of 100 mL/hour. The pool has a volume of 200 m3. You also add new water, and remove in-pool water, at a rate of 3.785 L/minute. The chlorine reacts with the organic matter in the with a rate of 0.5/hour. How long will it take to get the Cl2 residual up to 1 mg/L if you add Cl2 continously.
A chlorine dosage of 2.7 mg/L is used to disinfect an average flow of 20 mgd. How many 100 lb chlorine cylinders are needed per month.
A flow meter reads 23532 gal on June 1 and 6040872 gal on July 1. What is the average daily flow in gallons per day? (30 days = 1 month)
Question 4 Screenings are placed in a debris roll-off dumpster that holds 20 cubic yards of screening. How long will it take to fill the 20 cubic yard dumpster in days? Known Unknown Flow 8.0 MGD Time to fill dumpster, days Screening removed gal/day-100 gal/day Capacity of dumpster = 20 cubic yards 7.48 gallon in a cubic ft (ft3) 27 cubic ft in a cubic yard (yd3) = O 0.72 days O 100 days O 40.39 days
Problem 1A 300-house residential development is proposed. Assume that each person uses 500 liters on average eachday. Suppose that four people live in each house. Calculate how many more liters of water per day onaverage that will need to be supplied.
[3] Estimate the total daily water withdrawal (m³/d) for all uses for the Unites States in 2000, knowing: ● Total population in 2000: 281,421,906 Daily water withdrawal per capita (Lpcd) in 2000: 5,400 Lpcd [4] 7.5 ppb = mg/L = μg/L= ppm
Please solve #3. First 2 parts have been solved
Table Q1-1 shows the list of the constituents of the treated water in a water treatment facilities prior to discharge. Based on the National Standard for Drinking Water Quality (NSDWQ), state the maximum acceptable value for each of the parameter. Provide a conventional treatment for each of the parameter if the current treatment is inadequate. Table Q1-1 Water Constituents After Treatment Value (mg/litre (unless otherwise stated)) 65.5 NTU 115 TCU Parameter Turbidity Colour Manganese 0.5 BOD 26.8 Arsenic 0.005 Hardness 560

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Taking 5400 Lpcd for fresh and saline water for all uses for US 2000. Calculate the total daily withdrawal as follows: