Engineering, 17.04.2020 00:30, 1thousandwishes
A wastewater is to be treated with GAC to remove its COD. The following data were obtained from a lab study in which 0.5 g of GAC was added to a beaker containing 0.5 L of wastewater at selected COD values. Determine (1) the more suitable isotherm (Langmuir or Fruendlich) to describe the data (find the isotherm constants), and (2) how much GAC is needed to treat a flow of 5000 m3/d to a final COD concentration of 20 mg/L if the initial COD of the wastewater is 120 mg/L.
Answers: 3
Engineering, 04.07.2019 18:10, abdirahmansoloman
Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?
Answers: 1
Engineering, 04.07.2019 18:10, katelynn73
Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1
Answers: 1
Engineering, 04.07.2019 18:20, alexis9263
Have a greater impact on maintenance productivity than any other support group. (clo5) a)-the top management b)-inventory and purchasing c)-sub-contracting d)-cmms
Answers: 2
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