What is turbidity, what causes it, how is it treated why it is undesirable in drinking water. Describe processes in water treatment? Calculate the velocity gradient in a rapid mixer (coagulation), where the power input to the propeller is 0.5 kW, the plant provides water for 13000 people with average consumption of 130 L/person/day, retention time in rapid mixer is 23 s and water temperature is 20 oC. The dynamic viscosity at 20oC is 1x10-3 Pa/s. Debate the G value and if out of the range what steps to take bring G in the

What is turbidity, what causes it, how is it treated why it is undesirable in drinking water. Describe processes in water treatment? Calculate the velocity gradient in a rapid mixer (coagulation), where the power input to the propeller is 0.5 kW, the plant provides water for 13000 people with average consumption of 130 L/person/day, retention time in rapid mixer is 23 s and water temperature is 20 oC. The dynamic viscosity at 20oC is 1x10-3 Pa/s. Debate the G value and if out of the range what steps to take bring G in the

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter5: Separation Processes

Section: Chapter Questions

Problem 5.30P

See similar textbooks

Similar questions

A container contains 200 g of solution in which 30 grams of salt are dissolved. Brine containing 1 g of salt/L is then poured into the tank at the rate of 4L / m * i * n and the solution is mixed well and is pumped out of the same rateFind the amount of salt in the container after 5 minutes ?
Determine the amount of coagulant required per day (kg/day).• Assume that the optimum dosage of alum at 25 mg/L was used and that the density of alum was 600kg/m3, Power = 1736.3 watt, Volume= 10.83 m^3 , water temperature is 20 oC, and velocity Gradient is 400 1/s.• Amount of alum = ? (kg/month)• Volume of alum = ? (m3/month)
A pipe line 6000 m long is to convey a sewage having some corrosive effect. Bids have been received for reinforced concrete, cast iron and steel. Because of the varying hydraulic qualities of the inside surfaces the reinforced concrete was to be 39 inches in diameter, the cast iron pipe 42 inches in diameter and steel 45 inches in diameter. The assumed length of life of the materials are 100,75 and 50 years for cast iron, concrete and steel respectively. Annual maintenance costs are assumed as P 600 for cast iron, P 900 for concrete and P 3,600 for steel. The bids are P 790,000 for reinforced concrete and P 580,000 for steel. If interest rate is 5%, which of the bid is favourable?
Determine how much extra volume is needed to treat the following wastewater in a CSTR than in a plug flow reactor. • Influent TOC: 273 mg/L • Required Effluent TOC: 57.0 mg/L • Flow: 792,500 gallons/day • First Order Microbiological Rate Coefficient (k’): 5.98/day Answer: 295,000 gallons 2. Discuss in detail at least two ways the k’ value may have been obtained and which technique is probably more accurate?
A wastewater treatment plant will receive a flow of 30,000 m3/day. The plant has a 3.6 m deep circular primary clarifier with a surface overflow rate of 60.0 m3/m2-day.a. Calculate the surface area (m2), diameter (m), volume (m3), and hydraulic retention time of the primary clarifier.b. How long will it take a 1.0 mm particle with a density of 1500 kg/m3to settle in the primary clarifier? show all work
a) What is the volume flow rate of oil in the channel? b)What is the mass flow rate?
A cylindrical container is 185mm in diameter and weighs 3.55N when empty. When filled to a depth of 250 mm with acertain oil, it weighs 55.4 N. Calculate the specific gravity ofthe oil.
A vulcanizing shop has a trapezoidal drum that is 5 meters long, 1.5 meter wide at the top, 1 meter wide at the bottom, and 1 meter deep. If the hose fills up the drum at 0.32 cubic meter per minute, find the rate of the rising water once it fills up half of the drum. Neglect the existence of the drum’s thickness.
An urban sludge basin has a volume of 500 m3. The basin is initially 64% full. The sludge with a density of 1320 kg/m3 is taken away from the basin at a rate of 4 ton/day. How long will the basin take to be fully emptied? Assume the basin is now initially full and re-estimate the time to empty it completely
We have a 20 meter long pipe for sewage transfer. If the mass percentage of solids in the effluent is 0.5%, calculate the minimum slope of the pipe so that the solid does not settle in the pipe.
A wastewater treatment plant discharges 20,000 m3/d of treated sewage into a river. The effluent’s BOD is 25.0 mg/L. The river’s flow and velocity are 5,500 m3/d and 23 km/hr, respectively. At the point of the effluent discharge, the river’s BOD and DO are 2 mg/L and 6 mg/L, respectively. The river’s water temperature is 25 °C. The deoxygenation coefficient, kd, was determined to be 0.45 day-1, and the reaeration coefficient, kr, is 0.52 day-1. Apply the plug flow model assumptions and calculate the the oxygen deficit at the point of the effluent discharge, the BOD at the point of the effluent discharge, the critical time and distance and minimum DO level.
PLEASE PUT ALL THE DECIMAL PLACES. THANK YOU The average hourly water consumption per person is 2.5 Liters anf there are 264 people in the area. Determine the following. a. the minimum rate of flow in L/s in the spring b. Total Daily water demand in L/day c. The daily yield is sufficient to the water demand of the community if the rate of flow is 0.182 L/s d. the height of the cylinder in cm thatt the minimum discharge can fill within 300 secs. diameter of the cylinder is 10 cm.