An activated sludge process with an aeration basin of 4,000 m³ is treating a wastewater flow of 7,500m³/day. The influent BOD5 is 250 mg/L and the activated sludge is designed to remove 90% of BOD5.(**Biomass wasting directly from the aeration basin)Pertinent data: Biomass concentration in aeration basin = 2000 mg/LBiomass concentration in the effluent = 20 mg/LWaste flow rate = 250 m³/day (biomas wasted directly from the aeration basin)kd = 0.01 d-¹(a) Calculate the MCRT of the process.(b) Determine the yield coefficient, Y.(c) If the recycle ratio is 0.5 (i.e., QR = 50% of Q), calculate biomass concentration in recycled activatedsludge, XR. (Assume: influent biomass, X = 0) InfluentBiomassWastingBiomass recirculationEffluent

Given Data- Aeration basin volume (V) = 4000 m³- Influent flow rate (Q) = 7500 m³/day- Influent BOD₅…

Answered: An activated sludge process with an…

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

A complete mix activated sludge process is to be used for biological treatment. This plant receives 10,000 m³ of wastewater per day with BOD loading of 250 mg/L. The primary treatment efficiency is 25%. Assume the followings: ● ● -4- Plant effluent BOD5 = 12 mg/L Biomass yield = 0.54 kg biomass / kg BOD Endogenous decay rate=0.05 day-¹ Solids Retention Time = 8 days MLVSS concentration in the aeration tank = 2,700 mg/L Waste and recycle solids concentration = 12,000 mg/L Determine the followings: (i). The hydraulic detention time in hours. (ii). The aeration tank volume in cubic meters. ...4/- SULIT EAP582
2. For an industrial wastewater activated sludge process, the amount of bsCOD in the influent wastewater is 300 g/m³ and the influent VSS concentration is 50 g/m³. The influent flowrate is 1,000 m³/d, the biomass concentration is 2,000 mg/m³, the reactor bsCOD concentration is 15 g/m³ and the reactor volume is 105 m³. Determine the net biomass yield (gVSS/g bsCOD), assume that maximum specific substrate utilization rate is 5 g/(g*day), half velocity constant is 40 mg/L bsCOD, endogenic decay coefficient is 0.1 gVSS/(g VSS d)
Expert Help pls
Activated sludge is treated in an aeration tank. The HRT is 8 hr, and the SRT is 6 days. The influent BOD concentration is 200 mg/l, and the effluent BOD concentration is 10.2 mgn. With a yield coefficient of 0,4 and a microbial death rate of 0.1 day1, what is the biomass concentration in the tank?Need Help ASAP
The wastewater from a synthetic textile manufacturing plant is discharged to a municipal treatment plant for processing with domestic wastewater. The characteristics of the synthetic textile wastewater are 1500 mg/L BOD, 2000 mg/L SS, 30 mg/L nitrogen, and no phosphorus. The characteristics of the domestic wastewater are 200 mg/L BOD, 240 mg/L SS, 35 mg/L nitrogen, and 7 mg/L phosphorus. Find the BOD, SS of the mixture. The ratio of flow rate is domestic/textile = 4/1
The BOD5 of the raw Divy Zeya Residential, London wastewater is 225 mg/L. A long term BOD test has revealed that this wastewater also has an ultimate carbonaceous BOD of 325 mg/L. Plant effluent testing has shown that the BOD5 drops by 92% across the plant. Long term tests on the effluent also show that the BOD decay coefficient is half the original value in the raw wastewater. Calculate the BOD decay coefficient of the raw wastewater and the ultimate carbonaceous BOD of the effluent wastewater.
The aeration tank influent flows at a rate of 1600 cu.m/day with BOD(biochemical oxygen demand) of 145 mg/L. The MLSS is around 200 mg/L. If the capacity of the aeration tank is 2000 cu.m, determine which of the following statements is true. a) The aeration tank is not operating in an ideal condition; there are excess bacteria that might go with the treated water b) The aeration tank is operating in good condition; BOD and bacteria are in ideal balance c) The aeration tank is operating in good condition; however, there is a need to control the flow rate of the feed d) The aeration tank is not operating in an ideal condition; need to add more bacteria to treat excess BOD
Wasterwater Engineering Civil engineering
Subject environmental engineering solve question 10
1. A natural water with a flow of 4.0 MGD is to be treated with a commercial-grade alum dosage of 80 mg/l. Determine the amount of alum required (expressed in lbs/day), the amount of natural alkalinity required to complete the reaction (expressed in mg/l as CaCO3 and kg/day), and the amount of Al(OH)3(s) sludge produced (expressed in lbs/day and gal/day) if the sludge contains 2.2% solids by weight and the S.G. of the dry solids is 2.0.
A wastewater treatment plant has been operating with the following specifications:flow rate = 7,630 m3/d, aeration tank volume = 1,270 m3, mixed liquor volatile suspendedsolids = 2,600 mg/l. The soluble BOD in the plant influent used to be 133 mg/l, but hasrecently changed to 222 mg/l. What is the new MLVSS this plant should use to maintain thesame F/M ratio as before? (Ans. Xnew = 4,340 mg MLVSS/l)
For the following wastewater and biomass characteristics: Q0 = 50 m3/d S0 = 60 mg NH4+-N/l Xi0 = 20 mg/l k= 2.5 mg NH4+-N/mg VSS-d K = 1 mg/l Y = 0.34 g VSS/g NH4+-N b = 0/day Calculate the volume of the CSTR required for 50 and 98% removal of ammonia by oxidation to nitrate.

SEE MORE QUESTIONS

Recommended textbooks for you

Structural Analysis

Civil Engineering

ISBN:

9781337630931

Author:

KASSIMALI, Aslam.

Publisher:

Cengage,

Structural Analysis (10th Edition)

Civil Engineering

ISBN:

9780134610672

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Principles of Foundation Engineering (MindTap Cou…

Civil Engineering

ISBN:

9781337705028

Author:

Braja M. Das, Nagaratnam Sivakugan

Publisher:

Cengage Learning

Structural Analysis

Civil Engineering

ISBN:

9781337630931

Author:

KASSIMALI, Aslam.

Publisher:

Cengage,

Structural Analysis (10th Edition)

Civil Engineering

ISBN:

9780134610672

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Principles of Foundation Engineering (MindTap Cou…

Civil Engineering

ISBN:

9781337705028

Author:

Braja M. Das, Nagaratnam Sivakugan

Publisher:

Cengage Learning

Fundamentals of Structural Analysis

Civil Engineering

ISBN:

9780073398006

Author:

Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning

Publisher:

McGraw-Hill Education

Sustainable Energy

Civil Engineering

ISBN:

9781337551663

Author:

DUNLAP, Richard A.

Publisher:

Cengage,

Traffic and Highway Engineering

Civil Engineering

ISBN:

9781305156241

Author:

Garber, Nicholas J.

Publisher:

Cengage Learning

SEE MORE TEXTBOOKS