- Wastewater Primary Treatment 1 An Industrial Wwtp Receives An Average Daily Wastewater Flow Of 79 200 M D Circular Pr 1 (110.49 KiB) Viewed 31 times
Wastewater Primary Treatment 1. An industrial WWTP receives an average daily wastewater flow of 79,200 m³/d. Circular primary clarifiers will used to treat the flow. The peak hour flow anticipated is 1.5 times the average daily flow. Use the design criteria in Table-1, determine the following: a. The diameter of each primary clarifier b. The detention time in each clarifier at ADF. c. The depth of the tank. d. The weir-loading rate (m³/d.m) for each clarifier at PHF. Table-1: Design criteria for primary sedimentation tanks Parameter Value Detention time at average flow 1.5 - 2.0 hr Peak overflow rate 100 m³/d. m² Peak weir loading 125 500 m³/d. m Circular tank: Circular tank: 3-4.5 m 3 - 60 m Rectangular tank: Circular tank: 3 - 4.5 m 15 - 90 m 3- 24 m Not less than 4:1 Depth Diameter Depth Length Width L:W ratio