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Unformatted text preview: of the waste gas if 10 5 moles of gas are processed per minute. Problem 4. One of the goals of water and wastewater treatment plants is to remove suspended particles from water. This can be achieved in a settling tank (aka sedimentation tank) where particles settle out of the solution by gravity. The settled particles are removed from the tank via the outlet at the bottom (Q w ), and the clear water exits the tank via the outlet on the right (Q out ). Consider a settling tank in a wastewater treatment plant that is operating under steady-state conditions and has influent concentration (C in ) of 220 mg/L of suspended solids, and effluent concentration (C out ) of 45 mg/L, and a waste concentration (C w ) of 10,000 mg/L. Assume that no reactions involving these solids occur in the tank. If the influent flow rate is 450 m 3 /h, what is the waste flow rate Q w ? Sedimentation Tank...
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- Winter '14
- Environmental Engineering, 50%, Sewage treatment, 20%, Wastewater Treatment Plant, 45 mg, 10,000 mg