An activated sludge system is being used to treat 2000 m3/d of wastewater containing 250 mg/L BOD5. The measured parameters for the system are as follows: K; = 40 mg BOD5/L; ka = 0.01 d1; Y = 0.6 mg VSS/mg BOD; Hmax = 2.0 d1. MLVSS = 2000 mg/L. Calculate the aeration basin volume (m³) to achieve 99 % BOD5 removal.

An activated sludge system is being used to treat 2000 m3/d of wastewater containing 250 mg/L BOD5. The measured parameters for the system are as follows: K; = 40 mg BOD5/L; ka = 0.01 d1; Y = 0.6 mg VSS/mg BOD; Hmax = 2.0 d1. MLVSS = 2000 mg/L. Calculate the aeration basin volume (m³) to achieve 99 % BOD5 removal.

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

3. Consider the design of a wastewater treatment plant (WWTP) for a community with the following design data: TABLE 1: Design Data Design data Flow-0.150m³. s-¹ Influent suspended solids-280mg L-¹ Influent BODs = 500mg L-¹ -1 Sludge concentration= 6.0% Efficiency= 60% Effective length= 40.0 m Width = 10.0 m Liquid depth = 2.0 m Weir length= 75.0 m Table 2: Acceptability Criteria Parameter Detention time (hours) Overflow rate (m- day) Weir loading (m³-day m¹') Acceptable range 1.5-2.5 80-120 <250 (c) Assume that the primary sedimentation process in this treatment facility removes 60% of the suspended solids (SS) and 40% of the BODs of the raw sewage. Determine the SS and BOD5 concentrations in the primary sedimentation effluent flow.
Please solve quick!
Q 1. Calculate the volume and weight of sludge generated per day in circular primary settling tank by chemical coagulation. Find HRT of tank also. Data given as: Wastewater flow: 10000 m/d FeCl; added in PST: 500 mg/L Overall particle removal efficiency: 80% Sludge's specific gravity: 1.05 Assume STANDARD chemical reactions and their product's behavior (if any). TSS in influent: 1100 mg/L Ca(OH)2 added in PST: 400 mg/L PST depth: 3 m Sludge's moisture content: 95% Surface overflow rate: 40 m/d
A sewage treatment plant contains fourteen standard rate tricking filters with diameter 37.8m filters, and two secondary Jarifiers with diameter 18.2m. Calculate the maximum allowable output capacity of the treatment plant using the following data: . BOD of raw sewage 300 mg/L. . BOD removal in primary sedimentation 30% . BOD effluent 35 mg/L • Overall efficiency of BOD removal 90%
Wastewater pipe with 70 m length, 4% slope, n= 0.014, d/D is 0.65 and 10" diameter, estimate the followings Vp/Vf= Qp/Qf= m/sec Vfull= m/sec Qfull= Liter/sec Vp= m/sec Qp= Liter/sec
A 4-mL wastewater sample is mixed with 16-mL of distilled water for dilution. Calculate the Dilution Factor (DF) for the sample. DF= A/
Then, you were asked to find out the biodegradability of this wastewater by conducting a 5-day biochemical oxygen demand (BOD5). A good indication for a biodegradable wastewater would have a COD/BOD ratio of 2 and above. Here, 55 mL of sample was employed for the test where the measured dissolved of oxygen at day 0 was 7.7 mg/L and 2.3 mg/L, respectively. Assess if the wastewater is biodegradable.
4.4.If an industrial plant is generating wastewater containing 350 mg/L of lysine [HO₂ CCH (NH2) (CH2)4 NH2], the C-ThOD required is around: a) 538 mg 02/L b) 759 mg 02/L c) 642 mg 02/L d) 862 mg O₂/L 4.5.A circular clarifier has a diameter of 60 ft. If the primary effluent flow is 2 MGD, what is the surface overflow rate in gpd/ft²? a) 1080 gpd/ft² b) 708 gpd/ft² c) 845 gpd/ft² d) 777 gpd/ft² 4.6.A stream with a velocity of 0.5 m/s, de-oxygenating rate of 0.2/day, and re-oxygenation rate of 0.3/day. The ultimate BOD in the discharge point is 30 mg/L. The stream is in a saturation level before outfall with a temperature of 20°C. Assume same temperature, what is the DO in 5 km d) 12.3 mg/L downstream? a) 8.4 mg/L b) 9.1 mg/L c) 10.2 mg/L
Exercise 4 A treatment plant has the following process diagram. Determine the flow rate expression for each unit. The inflow is Qi. The sludge waste flowrate is Qw. The return flowrate rate is Qr. The mixed liquor return flowrate is Qm. Mixed-liquor return Secondary clarifier Effluent Influent- Anoxic Aerobic Anoxic Aerobic Return activated sludge (e) Bardenpho™ (4-stage) Sludge Exercise 5 Derive the ODE system for above process. There are two species involved in the reaction, as shown below. The process rate for each tank can be simply represented by r1, 12,...15. The gravitational sedimentation is only applied to species X in the clarifier and can be represented by a reaction rate of r5 = 3.5X5. The influent are Xi and S₁. S=X.
Please help The wastewater contains 7.5 x 105 fecal CFU per liter. The permissible fecal coliform concentration is 3500 fecal coliform CFU/L. Calculate the length of pipe required if the linear velocity of the wastewater pipe is 0.75 m/s. Take the reaction rate constant for the destruction of the fecal coliform is 0.24 per min.
The aeration tank for a completely mixed aeration process is being sized for a design wastewater flow of 4500 m³/d. The influent COD is 150 mg/L. The design effluent COD is 7 mg/L. Recommended design parameters are a sludge age of 10 days and MLVSS of 1400 mg/L. The expected Sludge Volume Index is 100 ml/g. The selection of these values takes into account the anticipated variations in wastewater flows and strengths. The kinetic constants from a bench-scale treatability study are Y = 0.60 mg VSS/mg COD and ke = 0.06 per day. Calculate: a. the hydraulic residence time and volume of the aeration tank b. the food/microorganism ratio c. the sludge production rate d. the sludge recycle ratio e. the oxygen requirement
Consider a rectangular wastewater treatment pond having a length of 100 ft,width of 20 ft, and depth of 20 ft. Assume the discharge from a wastewater treatment plant has aflow of 30 MGD with a solids concentration of 5 mg/L.a) Determine the mass flow rate of solids discharged in ton per day?b) Calculate the residence time of the pond in minutes?