Aluminum pieces inadvertently collect on the filter. a. If left on the filter, will the percent yield of the alum be reported as too high or as too low? Explain. b. If the aluminum pieces are detected on the filter, what steps would be used to remedy the observation? Explain.

BOD of a wastewater sample is determined by incubating the BOD bottles at four different temperatures, 5, 15, 20, 35, and 50°C. i The ultimate BOD of the sample incubated at 10°C would be-----compared to the sample at 50°C. ii. The reaction rate constant, k for sample incubated at 35°C would be- compared to the sample incubated at 5°C

Small droplets of carbon tetrachloride at 68 °F are formed with a spray nozzle. If the average diameter of the droplets is 280 µm what is the difference in pressure between the inside and outside of the droplets? Pa

2. The suspended solids content is determined by filtering a portion of the sample through a glass-fiber filter disk, drying the disk at 105°C, and igniting the residue by placing the dried sample in a muffle furnace at static (?). The following masses are recorded: • Volume of sample: 30 mL • Mass of filter disk: 0.1170 g a) The total suspended solids content is: b) The volatile suspended solids content is: Mass of disk and dry solids: 0.1278 g Mass of disk and ignited solids: 0.12489 g c) The fixed suspended solids content is:

What is the effective fiber diameter of a membrane filter with a pore size of0.45 * 10^-6? The solidity is 0.20, the thickness is 0.15 mm, and the pressure dropis 1 cm Hg at U0 = 0.015 m/s

Small droplets of carbon tetrachloride at 68 °F are formed with a spray nozzle. If the average diameter of the droplets is 300 μm what is the difference in pressure between the inside and outside of the droplets? Pa

State if the following statements are True or False. Edit the False statement with an appropriate statementa. ( ) To check the charge neutrality, we can compare the sum of the molar concentrations of cations and anions.b. ( ) The indicator microorganism for contamination of drinking water is Cryptosporidium parvus

For an electrostatic precipitator of given geometry and operating conditions, the collection efficiency for 2 micrometer particles is 99.90 percent. On the basis of a Deutsch-type equation for efficiencies, estimate the collection efficiency for (a) 1 micrometer and (b) 0.5 micrometer particles

Question 90/100 A trapezoidal section has a bottom width of 20 ft and side slope of inclination 1:1.5. Its friction factor f = 0.056. The depth of the channel is 4.0 ft. The channel slope is 0.025.Use C = √(8g/f) Compute the flowrate in cu.ft/s 1937 1370 2373 2062

Which of the following is not a piece of EPA legislation designed to protect the environment? Clean Water Act Clean Air Act O Civil Rights Act ORCRA D Question 2 What water contaminant was responsible for the 2014 Flint, Michigan water crisis? O Mercury Lead O PCB Giardia Question 3 What condition must be satisfied for us to use the Continuously Stirred Tank Reactor (CSTR) approach? Uniform well-mixed conditions Mixing occurs only in the axial direction The substance is conservative There is only one inflow channel D Question 4 A plug flow reactor is O Less efficient at removing pollutants than a CSTR Has the same efficiency at removing pollutants as the CSTR More efficient at removing pollutants than a CSTR Can be more or less efficient than the CSTR depending on the pollutant