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A lake with volume 10^3 m^3 is fed by a pollution-free stream with flow rate 5...
1. A lake with constant volume 10 x 106 m3 is fed by a pollution-free stream...
1. A lake with constant volume 10 x 106 m3 is fed by a pollution-free stream with a flowrate 50 m3/s. A factory dumps 5 m3/s of nonconservative waste with concentration 100 mg/L into the lake. The pollution has a reaction coefficient 0.25 day1. Assume the pollution is well mixed in the lake. Find steady state concentration of pollution in the lake.
11. A lagoon with constant volume of 450,000 m' is being used to treat two separate...
11. A lagoon with constant volume of 450,000 m' is being used to treat two separate waste streams. One has a flow rate of 5.0 m/s and a waste concentration of 500 mg/L. The other has a flow rate of 1 m/s and a waste concentration of 1500mg/L. The pollutant has a reaction rate coefficient (k) of 0.3/day. Assuming the pollutant is well mixed in the lagoon, find the steady-state concentration of pollutant in the lagoon. (10 Points)
Calculate the steady-state flow rate, Qe in m3/day, and concentration of lake effluent, ce in mg/L,...
Calculate the steady-state flow rate, Qe in m3/day, and concentration of lake effluent, ce in mg/L, for the following system. The lake is well-mixed with two streams that enter the lake. Evaporation takes place from the lake but because c is not volatile none of it evaporates. QvAP 200 m2/day CEVA,-0 mg/L Q1-8 m3/min 1 4 mg/L QE CE Lake Q2-12 L/s c2-50 mg/L
A lagoon with volume 1,000 m3 has been receiving a steady flow of a nonconservative pollutant...
A lagoon with volume 1,000 m3 has been receiving a steady flow of a nonconservative pollutant with reaction rate of .20/day at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 100 mg/L. Assume completely mixed conditions. If the input waste concentration suddenly decreased to 10mg/L, what would the concentration in the effluent be 10 days later?
please explain good Question 4 (20 points) A lagoon with volume 1.200 m' has been receiving...
please explain good
Question 4 (20 points) A lagoon with volume 1.200 m' has been receiving a steady flow of conservative waste at a rale of 100 m'iday for a long enough time to assume steady state conditions apply. The waste entering the lagoon has a concentration of 10 mg/L. Assuming completely mixed conditions. a) What would be the concentration of pollutant in the effluent leaving the lagoon? (10 points) b) If the input waste concentration suddenly increased to 100...
10. Consider a lake with 10 m' of surface area for which the only source of...
10. Consider a lake with 10 m' of surface area for which the only source of phosphorus is the effluent from a wastewater treatment plant. The effluent flow rate is 0.4 m/s, and its phosphorus concentration is 10 mg/L. The lake is also fed by a stream have 20 m/s flow with no phosphorus. If the phosphorus settling rate is estimated to be 10 m/yr, estimate the average phosphorus concentration is the lake. What level of phosphorus removal at the...
1. In 1970, the total phosphorus (TP) load to Lake Erie was 18.150 tonnes/year (where tonnes...
1. In 1970, the total phosphorus (TP) load to Lake Erie was 18.150 tonnes/year (where tonnes or metric ton = 1,000 kg). The surface area, volume, and outflow from Lake Erie are given as 25.2 x 10 m² 468 x 10 m, and 182 x 10 m yr, respectively. Based on previous evaluations, the total phosphorus is removed from the lake with an apparent settling rate of 16 m/yr. a. Draw a diagram and write the mass balance equation for...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant in the raw waste is 850 mg/L with first-order reaction rate constant of 2.5/day. The industry splits the flow into three parallel continuous stirred tank reactors at 0.25 m/day to reactor one, 0.3 m/day to reactor two and the remaining 0.17 m®/day to reactor three. If each reactor must achieve removal efficiency of 90%, what is the required detention time and the volume for...
5. A river with 20 ppm of a non-conservative (reactive) substance and an upstream flow of...
5. A river with 20 ppm of a non-conservative (reactive) substance and an upstream flow of 25 m/s receives an agricultural discharge of 5 m/s carrying 2000 ppm of the same reactive substance. The chemical in the agricultural stream mix instantaneously with the main river flow. The reactive substance has a first-order decay rate of 0.25/day and the river has a cross sectional area of 20 mperpendicular to the direction of flow. A municipality located 40 km downstream of the...
1. Calculate the volume of a completely mixed reactor needed (in m3)lto treat a flow rate of 3 MG...
problem 1 and 2!
please and thanks!
1. Calculate the volume of a completely mixed reactor needed (in m3)lto treat a flow rate of 3 MGD wastewater. The wastewater contains 220 mg/L of BOD with a rate coefficient of 0.4/d. The effluent target is 20 mg/L. Assume steady state. 2. For the same conditions, what would the size of a plug flow reactor be (in m2)?
1. Calculate the volume of a completely mixed reactor needed (in m3)lto treat a...
1. A lake with constant volume 10 x 106 m3 is fed by a pollution-free stream with a flowrate 50 m3/s. A factory dumps 5 m3/s of nonconservative waste with concentration 100 mg/L into the lake. The pollution has a reaction coefficient 0.25 day1. Assume the pollution is well mixed in the lake. Find steady state concentration of pollution in the lake.
11. A lagoon with constant volume of 450,000 m' is being used to treat two separate waste streams. One has a flow rate of 5.0 m/s and a waste concentration of 500 mg/L. The other has a flow rate of 1 m/s and a waste concentration of 1500mg/L. The pollutant has a reaction rate coefficient (k) of 0.3/day. Assuming the pollutant is well mixed in the lagoon, find the steady-state concentration of pollutant in the lagoon. (10 Points)
Calculate the steady-state flow rate, Qe in m3/day, and concentration of lake effluent, ce in mg/L, for the following system. The lake is well-mixed with two streams that enter the lake. Evaporation takes place from the lake but because c is not volatile none of it evaporates. QvAP 200 m2/day CEVA,-0 mg/L Q1-8 m3/min 1 4 mg/L QE CE Lake Q2-12 L/s c2-50 mg/L
please explain good
Question 4 (20 points) A lagoon with volume 1.200 m' has been receiving a steady flow of conservative waste at a rale of 100 m'iday for a long enough time to assume steady state conditions apply. The waste entering the lagoon has a concentration of 10 mg/L. Assuming completely mixed conditions. a) What would be the concentration of pollutant in the effluent leaving the lagoon? (10 points) b) If the input waste concentration suddenly increased to 100...
10. Consider a lake with 10 m' of surface area for which the only source of phosphorus is the effluent from a wastewater treatment plant. The effluent flow rate is 0.4 m/s, and its phosphorus concentration is 10 mg/L. The lake is also fed by a stream have 20 m/s flow with no phosphorus. If the phosphorus settling rate is estimated to be 10 m/yr, estimate the average phosphorus concentration is the lake. What level of phosphorus removal at the...
1. In 1970, the total phosphorus (TP) load to Lake Erie was 18.150 tonnes/year (where tonnes or metric ton = 1,000 kg). The surface area, volume, and outflow from Lake Erie are given as 25.2 x 10 m² 468 x 10 m, and 182 x 10 m yr, respectively. Based on previous evaluations, the total phosphorus is removed from the lake with an apparent settling rate of 16 m/yr. a. Draw a diagram and write the mass balance equation for...
1. An industry produces a degradable waste at flow rate of 0.72 m/day. Concentration of pollutant in the raw waste is 850 mg/L with first-order reaction rate constant of 2.5/day. The industry splits the flow into three parallel continuous stirred tank reactors at 0.25 m/day to reactor one, 0.3 m/day to reactor two and the remaining 0.17 m®/day to reactor three. If each reactor must achieve removal efficiency of 90%, what is the required detention time and the volume for...
5. A river with 20 ppm of a non-conservative (reactive) substance and an upstream flow of 25 m/s receives an agricultural discharge of 5 m/s carrying 2000 ppm of the same reactive substance. The chemical in the agricultural stream mix instantaneously with the main river flow. The reactive substance has a first-order decay rate of 0.25/day and the river has a cross sectional area of 20 mperpendicular to the direction of flow. A municipality located 40 km downstream of the...
problem 1 and 2!
please and thanks!
1. Calculate the volume of a completely mixed reactor needed (in m3)lto treat a flow rate of 3 MGD wastewater. The wastewater contains 220 mg/L of BOD with a rate coefficient of 0.4/d. The effluent target is 20 mg/L. Assume steady state. 2. For the same conditions, what would the size of a plug flow reactor be (in m2)?
1. Calculate the volume of a completely mixed reactor needed (in m3)lto treat a...
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