Q1) Downstream of the point where wastewater is discharged into a river, a contam into a...
is proposed to discharge a wastewater to a small river (wastewater and river characteristics given below). The temperature of the river and wastewater i and velocity downstream of the discharge is 1.5 m/s. Saturation DO concentr:a 25°C is 8.2 mg/L 2. It s 25°C, Wastewater 1.5 w 31.5 6.1 River Parameter Flow (m/s) BODu( mg/L) DO (mg/L) negligible 8.0 kra20c 0.41 day kd@20c = 0.26 day. Determine: a. Ultimate BOD just downstream of the point of discharge (8 pts) b....
Determine the minimum dissolved oxygen (DO) concentration in a river downstream from a wastewater treatment plant (WWTP) discharging at a flow rate of 5.00 million gallons per day (MGD). The WWTP achieves secondary treatment standards (BOD5 = 30 mg/L). The wastewater temperature is 25.0 °C and contains 4.0 mg/L of DO. The characteristics of the river upstream from the point of discharge are Q=20.0 cubic feet per second (cfs), T = 20.0°C, BODu = 3.0 mg/L. and DO = 7.0...
NT4-1. 3 pts. A beef stick manufacturing plant proposed to discharge saline (salty) wastewater to a river. Upon reviewing the proposal, the governing regulatory agency set a 200 mg/L salt maximum level in the river downstream of the discharge point. In response the manufacturing plant proposed adding desalination equipment between the manufacturing plant and the river to remove enough salt from the wastewater to meet the regulatory requirement, 15% of the wastewater flow becomes brine (concentrated salt), a byproduct from...
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...
Q1. The stage-discharge data of a river are given below. Establish a stage discharge relationship to predict the stage for known discharge. Assume the stage value for a zero discharge as 20.50 m. Also determine the stage of river corresponding to a discharge of 2600 m3/s. Table 1: Stage discharge data Stage (m): 21.95 22.45 22.8 2323.4 23.75 23.65 Q (m3/s)100 220 295 400 490 500 640 Stage (m) 24.05 24.55 24.85 25.4 25.15 25.55 25.9 m3 /s) 780 1010...