Question The domestic sewage of a town was tested for total solids and the following results were obtained : Weight of sample of sewage = 1000 gm Weight of solids after evaporation of liquid = 0.952gm Weight of dry residue after ignition = 0.516 gm What is the value of volatile solids?

Question The domestic sewage of a town was tested for total solids and the following results were obtained : Weight of sample of sewage = 1000 gm Weight of solids after evaporation of liquid = 0.952gm Weight of dry residue after ignition = 0.516 gm What is the value of volatile solids?

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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Mechanical Processes

In civil engineering, the materials have to undergo a series of manufacturing processes before using them in construction and structural applications. These manufacturing processes form the foundation stone of mechanical processes. Some of the civil engineering materials such as bars, metallic beams, metallic columns, surveying equipment, earthmovers, overhead cranes, structural and construction components, and even cement that is the most fundamental construction component need to undergo different manufacturing processes before they are ready to use. These processes are mechanical.

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A Warren girder bridge truss that will be subjected to loads as shown above is to be designed and analysed. All triangles are equilateral triangles and member a-b is 2 m long. Calculate the following: State the nature of the framework. Calculate the reactions at the supports. Using the method of sections (analytical method), calculate the magnitude of the internal forces in member b-c, b-g and g-h and state the sense (nature) of each force
Problem #7: A domestic sewage analysis was carried out for solid analysis. The test was performed using a sample size of 50 mL. Determine the concentration of total solids, total volatile and fixed solids, suspended, volatile suspended solids and fixed suspended solids. The information is as. Mass of empty evaporating dish = 53.5433 g; Mass of empty evaporating dish + residue after evaporation =53.5793 g; Mass of empty evaporating dish + residue after ignition =53.5742 g; Mass of empty filter =1.5433 g; Mass of filter after drying = 1.5553 g; Mass of filter at ignition = 1.5531 g. Problem #8: BoD, of sewage at 30°C is 120 mg/L. Determine its BoD; at 20°C. Problem #9: A sample of wastewater has a BoD; of 150mg/L at 20°C. The reaction rate at this temperature has been determined to be 0.23/day. Find out (i) The Ultimate Carbonaceous BOD. (ii) BoD; at 15°C and 25°C. (iii)Calculate BoD; remaining at 20°C.
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The tabulated data are obtained for a wastewater sample.Which of these numbers is questionable? Why?
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Q- If the BOD3 of a wastewater sample is 75 mg/L and reaction rate constant k (base e) is 0.345 per day, find the amount of BOD remaining in the given sample after 10 days.