Q5-): A city discharge 6 mgd of treated wastewater ,containing (7 mg/l) of phosphorus and (20 mg/l) of nitrogen, into ariver that enters alake ashort distance downstream. The average annual flow is (250 cfs) with mean nitrogen concentration of (0.2 mg/l) and phosphorus concentration of (0.02 mg/l). The wast surface area of the lake is (33000 acres) and the mean depth of the lake is (5 m). Development around. the lake contribute an estimated of (3100 lb) of phosphorus and (18000 lb) of nitrogen annualiy. 1 Calculate the nitrogen and phosphorus loading resulting from lake development, river and ? 2- to prevent further euotrphication of the lake, what effluent standards for nitrogen and the wastwwater treatment plant?

Q5-): A city discharge 6 mgd of treated wastewater ,containing (7 mg/l) of phosphorus and (20 mg/l) of nitrogen, into ariver that enters alake ashort distance downstream. The average annual flow is (250 cfs) with mean nitrogen concentration of (0.2 mg/l) and phosphorus concentration of (0.02 mg/l). The wast surface area of the lake is (33000 acres) and the mean depth of the lake is (5 m). Development around. the lake contribute an estimated of (3100 lb) of phosphorus and (18000 lb) of nitrogen annualiy. 1 Calculate the nitrogen and phosphorus loading resulting from lake development, river and ? 2- to prevent further euotrphication of the lake, what effluent standards for nitrogen and the wastwwater treatment plant?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Calculate the discharge if Cd 0.63 4 m 4.5 m -2 m- 0.5 m- 1 m Fig. 8-7.
Subject : Hydrology Give me right answer.. Urgent please
A community receives 0.50 m³/s of flow into its wastewater treatment plant. The total surface area of the primary clarifiers is 2,700 m² and the retention time is 3 h. Find the overflow rate and the depth of the clarifiers.
H2. Consider the treatment of a wastewater with the following characteristics: T = 25°C, total flow 650 m3/d, wastewater composition: sucrose (C12H22O11): C = 400 mg/L, Q = 250 m3/d, acetic acid (C2H4O2): C =940 mg/L, Q = 350 m3/d a) Estimate the methane production, from the anaerobic degradation of the discharge using the Buswell equation, in m3/d b) Calculate the total concentration of the residual water in terms of COD, the total mass flow of COD in the residual water (kg/d) and estimate from this last data the production of methane, in m3/d.
Q- A river has a flow of 1000 million litres per day (MLD). BOD5 of 5 mg/litre and Dissolved Oxygen (DO) level of 8 mg/litre before receiving the wastewater discharge at a location. For the existing environmental conditions, the saturation DO level is 10 mg/litre in the river. Wastewater discharge of 100 MLD with the BOD5 of 200 mg/litre and DO level of 2mg/litre falls at that location. Assuming complete mixing of wastewater and river water, the immediate DO deficit (in mg/litre, round off to two decimal places), is
.
3. A 55.0 ML/d wastewater treatment plant discharges to a river system with a maximum spring flow of 149.5 m3/min and a minimum summer flow of 98.2 m3/min (upstream of the outfall from the plant). What total allowable BOD (mg/L) could be discharged by the plant if the BOD in the river after dilution must not exceed provincial standards, and there is already 1.1 mg/L of pollution in the river upstream?
The surface runoff hydrograph after the base flow separation is called: * None of the these Direct Runoff Hydrograph (DRH) Base Flow (BF) Discharge (Q) Unit Hydrograph (UH) The total rainfall in a catchment of area 1200 Km2 during a 6-hr storm is 16 cm. The surface runoff is 1.2 *10^8 m3. The infiltration index is: * 1.2 cm/hr 0.1 cm/hr 1 cm/hr cannot be estimated with the given data 0.2 cm/hr
There are currently 420 inhabitants in the small village of Pravino. The population is estimated to increase to 940 in thirty years. The current average peak flow is 1.2 L/s and is expected to increase to 2.14 L/s by 2050. The organic load is approximately 45 g BOD5/capita/day. The community is considering a free surface wetland or a lagoon to treat their wastewater. 1. Use the BOD loading to estimate the maximum surface area (in ha) required for a free surface wetland to serve the community by 2050 and remove BOD to 30 mg O2/L and TSS to 30 mg/L.
Explain the design procedure for sanitary and storm sewer? According to your observation which type of sewer system is more effective? A catchment is having total area of 60 hectares. The rainfall intensity relation with duration ii. for this catchment is given by the relation I=100/(t+20),Where I is in cm/h and t is duration of rain in min. a) What will be the storm water runoff from this catchment if the average imperviousness factor is 0.64, and time of concentration is 35 min?
1. A 2 hr. UH is shown below Time (hr.) Discharge (m³/sec.) 1 5 2 15 12 3 4 10 5 6 If a storm of 4.2 cm. occurs in 2 hr. duration over the catchment and ø - index is 0.80 cm/hr., Calculate The maximum discharge of the resulting DRH (i) The maximum flood discharge if the base flow is 7 m/sec. (ii)
A wastewater treatment plant will receive a flow of 30,254 m3/day. Calculate volume (m3) of a 4-m deep circular, primary clarifier that would remove 50 percent of suspended solids. Assume the surface overflow rate used for the design is 60 m3/m2-day.