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Question: A water treatment plant carries an influent water with pH of 6 and after treatment, effluent have pH of 8. Determine the mean pH of water carrying through the water plant. Please deliver step by step solution of this problem.
A man has a mass of 100 kg. how much pressure would he apply to an I-beam if his shoes each have an area of 50 cm? what is his normal force?
The force F is acting on the boom ABC at C points in the direction of the unit vector 0.7071i-0.7071j and its magnitude is 10kN. The boom is supported by a ball and socket at A and cables BD and BE.
jar tests were perfomed on untreated river water. an optimum dose of 12.5 mg/L of alum was determined. determine the amount of natural alkalinity (mg/L as CaCO3) consumed.
The Earth may be considered as a sphere whose diameter is 8000 mi. and whose density is roughly approximated to be 6560 kg/m^3. What is the mass of the Earth in pound-mass and kilograms
A civil engineer used a 30-m tape in measuring an inclined distance. The measured length on the slope was recorded to be 459.20 m long. The difference in elevation between the initial and the end point was found to be 1.25 m
Assume the microorganisms are 55 percent efficient at converting food to biomass, the organisms have a first-order death rate constant of 0.05/day, and the microbes reach half of their maximum growth rate when the BOD5 concentration is 10 mg/L
A wastewater treatment plant produces 400 m3/d of biosolids in liquid form, containing 2.5% TSS. The specific gravity of the biosolids is 1.02. A centrifuge is used to produce 27% solids cake having a specific gravity of 1.10. If the centrifuge c..
A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8lb hexane per 100 lb carbon under the conditions at which the system will be operated.
A room 7m x 6m x 3m high is to be electically heated to maintain the inside temperature at 20 C, when it is 0 C outside. The room has 2 windows each 1.2m x 1.8m and a sliding glass door 2.4m x 2.1m. The transmission coefficients u in Wm^2/C are given..
A minimum contact time of 30 min is required to reduce the pathogen concentration from 100 pathogens/L to below 1 pathogen/L through a first-order decay process. You plan on treating water at a rate of 1,000 gal/min.
Calculate the exact alkalinity (in mg/L as CaCO3) of a water containing 58.01 mg/L of bicarbonate ion and 160.22 mg/L ofcarbonate ion. The water has a pH of 10.47.
Three cylinders from the same mix were tested for strenght. Cylinders A and B were cast in 4x8 molds while cylinder C was cast in a 6x12 mold. The total loads were as follows; cylinder A= 65,200 lbs., cylinder B= 68,550 lbs., cylinder C= 151,190 l..
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