Solution.
The ultimate BOD of tannery wastewater is
The ultimate BOD of a creek is
The initial ultimate BOD can be calculated using an equation
A tannery with a wastewater flow of 0.011 m^3/s and a BOD_s of 590 mg/L discharges...
Q4) A town of discharges 15,000 m'd of treated wastewater into a Creck. The treated wastewater has The treated wastewater has a BOD, of 10 mg/L and a ko of 0.12 d'. The creek has a flow rate of 0.6 m's and an ultimate BOD of 6 mg/L. The DO of the creek is 7 mg/L and the DO of the waste water is 1 mg/L. The creek has the temperature of 7 °C while the wastewater has a temperature...
A tannery discharges wastewater into a river under the following conditions: Parameter Wastewater River 1.148 Flow (m/s) BOD, at 15°C (mg/L) DO (mg/L) Temperature, Speed (m/s) Depth (m) 1.00 15.0 7.222 7.66 6.00 15.0 0.300 2.92 The BOD rate constant, k, in the river/wastewater mixture is measured as 0.379 d at 20°C. Deter- mine the ultimate BOD (in kg/d) that the tannery may discharge and still keep the DO in the minimum DO in the river above 5 mg/L.
O The town of Gangnam in Seoul, Korea discharges 17360 m3/day of treated wastewater in the Han River. The treated wastewater has a BOD5 of 12 mg/L and a BOD decay constant, k, of 0.12 day at 20 °C. The river has a flow rate of 0.43 m/s and an ultimate BOD, Lo, of 5 mg/L. The DO of the river is 6.5 mg/L and the D0 of the wastewater is 1.0 mg/L (a) Calculate the ultimate BOD of the...
The East Hartford WWTP discharges 150 MGD of treated wastewater into the CT river. The treated was tested in the lab and found to have aBOD5 of 17.5 mg/L and an ultimate BOD (Lo) of 92 mg/L at 20oC. Find the reaction rate K, for the treated wastewater. The CT river has a flow of 250 m2/s and an ultimate BOD (Lo) of 6 mg/L. the DO of the river is 4.5 mg/L and the DO of the wastewater is0.2...
A city discharges 16,000 m3/d of treated wastewater into a nearby river. The treated wastewater has a BOD5 of 12 mg/L and k of 0.12 d-1 at 20oC. The river has a flow rate of 0.43 m3/s and an ultimate BOD of 5.0 mg/L. The DO of the river is 6.5 mg/L and the DO of the wastewater is 0 mg/L. Compute the DO and initial ultimate BOD after mixing.
1. Some pond water contains 20.O mg/L of some algae, which can be represented by the chemical formula CsHisO&N. Using the following reactions: CoHisO&N606CO2 6H2ONHa NHs 202 NOs H2O (a) Find the theoretical carbonaceous oxygen demand CBOD (b) Find the nitrogenous oxygen demand NBOD (c) Find the total theoretical biochemical oxygen demand BOD 2. A sandy soil has a hydraulic conductivity of 6.1 x104 m/d, a hydraulic gradient of 0.00141, and porosity of 20%. (a)what is the Darcy velocity (b)what...
A wastewater treatment plant discharges hot water (310K) to a river. The flow rate of the river is 4×1010 L/day. Upon mixing, the hot water is cooled to 290K and the river water is heated from 288K to 290K. If 20% of the heat from the wastewater treatment plant effluent is radiated to the atmosphere, what is the wastewater treatment plant discharge rate (L/day)?
Please answer #5 4. What is the theoretical oxygen demand for a wastewater flow of 25 MGD (million gallons per day) containing 100 mg/L ethanol (C2H5OH)? 5. If this wastewater was discharged into a stream flowing at 10 m/s with an ultimate BOD of 5 mg/L, dissolved oxygen (DO) of 5mg/L, and deoxygenation rate coefficient ka of 0.2/day: (a) Find ultimate BOD of mixture just downstream of wastewater discharge. State all assumptions used. (b) In your opinion, is the wastewater...
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....
e3 (20) LEMery has asked you to assist them in preparations to file for a NPDES germit toad discharge wastewater into t Rive r is 5 mg/L of DO. They have asked you the following questions: What is the cr where (at what distance) he Zmellsbad River. The DNR water quality criterion for the downstream does it occur? Is ther d oxygen? They have provided you with the following data. They pertaitn a problem with the cinicau and following data....