2. What is the effluent concentration of a substance t CM reactors at a concentration of 560 mg/l ? Fach re

What are the two reasons for using vacuum filtration to collect the alum crystals?

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

Lake Bonaventure is a lake fed by the Saint Croix River.  The Acme smeting company discharges the heavy metal nickel into the lake.  The easy way to model the concentration of nickel is to assume the lake is well mixed.  It isn’t.  The lake has a mean depth of 30m, and during the summer a surface epilimnion of 5m develops, which breaks down for the winter.  (no calculations are required to answer the questions below) (A) Given what you know about the hydrology of lakes, what differences in concentration would there be if the smelter discharges at the surface or at a depth of 30m? (B) How would concentrations vary in the lake throughout the year? (C) What if you factor in the fact that the flow of the Saint Croix River is less during the winter?