1. effects of wastewater on the environment

The town of Smelly, AL has a wastewater flow rate of 15,000 gpm which is to be disposed of using a nearby sand bed waste disposal site. The sand bed has a depth of 3 fth and a permeability of 1.2 darcy. If the waste water level above the sand is limited to one foot, determine the area of sand bed required for a water viscosity of .9 cP. Give your answer in acres.

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This question about Sanitary Engineering A ............ is a device with holes for eliminating greater moving substance in waste water which would restrict with acceptable maneuver of treatment components. • A. Screen • B. Aeration • C. Filters • D. All

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A flowing stream has a temperature of 14°C, flow rate of 3.0 m}sec, saturated dissolved oxygen content and BODs of 15 mg/L with reaction rate constant of 0.13/day. Waste is discharged into the stream at a flow rate 0.5 m3/sec, temperature of 30°C, ultimate BOD of 50 mg/L and dissolved oxygen content of 2.5 mg/L. The discharged waste has same characteristics as the initial pollutant in the stream with the same reaction rate constant of 0.13/day.Determine:1. Temperature of the resulting combine flow at the mixing point2. Ultimate BOD of the combine flow at the mixing point. 3. Dissolved oxygen content in the combine flow at the mixing point. 4. Oxygen deficit in the resulting combine flow at the mixing point.5. Oxygen deficit and dissolved oxygen content in the stream at exactly one day after the initial mixing of the waste into in the stream if the deoxygenationand reaeration rate constants are 0.2/day and 0.4/day, respectively.6. Length of time in days to reach minimum oxygen content,…

The characteristics of the synthetic textile wastewater are 1500 mg/L BOD, 2000 mg/L SS, 30 mg/L nitrogen, and no phosphorus. The characteristics of the domestic wastewater are 200 mg/L BOD, 240 mg/L SS, 35 mg/L nitrogen, and 7 mg/L phosphorus. Find the nitrogen concentrations in the mixture. The ratio of flow rate is domestic/textile = 4/1

The City of Marietta has been directed by the City Board to upgrade its primary Wastewater Treatment Plant (WWTP) to include a secondary treatment process that can meet an effluent standard of 20 mg/L of BODs and 20 mg/L of suspended solids (SS). They want to select completely mixed activated sludge system. The BOD5 of the SS is estimated to be 50% of the SS concentration. Assume L:W within 4:1 and maximum depth of 4.5 m and maximum length of 50 m for the tank. Assume the reasonable values of missing parameters from FE Exam Handbook. The effluent characteristics from the primary treatment process are: Flow = 0.150 m's, BOD5 =75 mg/L. Assume the values for the growth constants as K, = 100 mg/L BOD5, Mm = 2.5 d-1, kg = 0.05 d'1. Y = 0.50 mg VSS/mg BODs removed, MLVSS = 2,800 mg/L, MISS - 1.20 (MLVSS), wastewater temperature = 25.0°C. Assume 8% 02 transfer rate and BOD5 to BODu ratio as f = 68%. If SRT (qc) = 14.5 days, the volume of the aeration tank is nearly?

A flowing stream has a temperature of 14°C, flow rate of 3.0 m}sec, saturated dissolved oxygen content and BODs of 15 mg/L with reaction rate constant of 0.13/day. Waste is discharged into the stream at a flow rate 0.5 m3/sec, temperature of 30°C, ultimate BOD of 50 mg/L and dissolved oxygen content of 2.5 mg/L. The discharged waste has same characteristics as the initial pollutant in the stream with the same reaction rate constant of 0.13/day.Determine: 4. Oxygen deficit in the resulting combine flow at the mixing point.5. Oxygen deficit and dissolved oxygen content in the stream at exactly one day after the initial mixing of the waste into in the stream if the deoxygenationand reaeration rate constants are 0.2/day and 0.4/day, respectively.6. Length of time in days to reach minimum oxygen content, in the stream at the same rate constants given in part e above. 7. The maximum oxygen deficit in the stream at the same rate constants given in part e above. 8. The minimum dissolved oxygen…