Engineering, 24.04.2020 18:17 jacobgooding830

The 500- bed Lotta Hart Hospital has a small activated sludge plant to treat its wastewater. The average daily hospital discharge is 1500 L per day per bed, and the average soluble BOD5 after primary settling is 500 mg/L. The aeration tank has effective liquid dimensions of 10m wide by 10m long by 4.5m deep. The plant operating parameters areas follows: MLVSS =2500mg/L MLSS= 1.20 (MLVSS) Determine the following: aeration period, F/M ratio, SVI, solids concentration in return sludge. Using the following assumptions, determine the solids retention time, the cell wastage flow rate, and the return sludge flow rate for the Lotta Hart Hospital WWTP (Problem 1. ). Assume: Allowable BOD5 in effluent = 25 mg/L Suspended solids in effluent = 25 mg/L Wastage is from the return sludge line Yield coefficient = 0.60 mg VSS/mg BOD5 removed Decay rate of microorganisms = 0.060 d-1

Answers: 3

Show answers

Other questions on the subject: Engineering

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

continue

Engineering, 04.07.2019 18:10, aaliyah80

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

Answers: 1

continue

Engineering, 04.07.2019 18:10, Tyrant4life

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

Answers: 1

continue

Engineering, 04.07.2019 18:10, genyjoannerubiera

Assuming compressible flow of air and that the measurements are done at flagstaff a pitot static tube that gives the difference of total and static pressure measures 0.35 m of mercury. what is the velocity of air? assume the temperature to be 300k. (submit your excel or matlab calculation sheet)

Answers: 1

continue

You know the right answer?

The 500- bed Lotta Hart Hospital has a small activated sludge plant to treat its wastewater. The ave...