air classifier is applied to separate a mixture

Using the energy content (wet basis) of the waste components given in the Table P2-17,calculate the overall energy content of the waste having the composition shown. This calculation can be simplified by assuming 100 lb of waste. Table P2-17 Component Energy, Btu/lb Percent by weight Food 2000 10 Paper 7200 33 Cardboard 7000 8 Plastics 14,000 5 Textile 7500 3 Rubber 10,000 4 Yard waste 2800 18 Metals 300 10 Miscellaneous 3000 9 2-18. Determine the composition of the waste in Problem 2-17 if 10% of the wood waste, 50% of the paper, 30% of the met- als, and 25% of the plastics are recycled. How would this affect the energy content. 2-19. To achieve a 60% volume reduction of a cardboard carton, how much energy would be needed? 2-20. How has municipal solid waste genera- tion and diversion in the United States changed since 2008?

An effluent stream sample (500 mL) from a metal-working facility contains 0.52 g nickel sulphate. (i) What is the nickel concentration of this effluent stream (in mg/L)? (ii) Would you regard this concentration as suitable for discharge to the local sewage system? (iii) How much total nickel (in kg) leaves the facility per year in this stream if ~1 ML of effluent is produced?

An industrial waste with a flowrate of 110 L/min contains 40 mg/L of zinc. Calculate: 1.) the pH required to maintain a zinc concentration of 2.6 mg/L (EPA's industrial limit for discharge into a sanitary sewer), and 2.) the dose of hydrated lime (Ca(OH)2) required (g/min).

Determine leachate generated in a cell in a 12-month period. You may assume that: -Percolation through the cover is 15in -Water consumed by waste decomposition is negligible (Life 1 contains mostly fresh waste) -Water loss as water vapor in landfill gas is negligible (again due to fresh waste) -Initial moisture content in fresh waste = 0.20 -Weight of waste in the lift = 3000 lb/yd² -Weight of cover = 1500 lb/yd² -The following sketch depicts water in and out of a waste lift. Water consumption by waste decomposition PER or leachate from above Water stored in waste Leachate generated Water loss as water vapor in landfill gas

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

The absolute viscosity of the peanut oil is 41x10-3 Pa-s and the specific gravity is 0.95. If the discharge is 8.6 L/s, what is the associated Reynolds number at the throat of the Venturi meter for a throat diameter of 51 mm?