handwritten answers are preferred 5.A textile dyeing factory produces effluent containing Zn2+, Ag+, and Cd2+ atconcentrations of 30, 10, and 40 mg/L, respectively. The wastewater flow rate averages 350m3/d. An ion exchanger with a capacity of 2.50 meq/g is to be used to remove these metalsbefore discharge of the waste to the sewer. The exchange capacity of the resin on a volumetricbasis is 1.5 meq/L. The regenerant solution will be HCI at a concentration of 40 g/L.a. What is the volume of the ion exchanger and mass of resin that is needed to removethese ions if the resin is to be regenerated once per month?b. What is the volume of regeneration using every month?

Step 1: a. Volume of the ion exchanger and mass of resin needed:Calculate the total meq of each…

Answered: 5. A textile dyeing factory produces…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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
As an operator of a wastewater treatment facility, you have learned that your plant runs well at an SRT (based on MLVSS (X) in the aeration basin) of 12 days. If today’s MLVSS (X) concentration is 2,700 mg/L and the RAS (Xr) concentration is 5,500 mg/L, how many L of sludge should you waste from the secondary clarifier today? Other design conditions: Average influent flow = 12,000 m3/d Influent soluble BOD = 150 mg/L Required effluent TSS = 30 mg/L Aeration tank Volume = 1,000 m3
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 nitrogen concentrations in the mixture. The ratio of flow rate is domestic/textile = 4/1
Please calculate the ThOD, COD, and ultimate BOD of a wastewater containing (a) 500 mg/L acetate (CH3COOH), which is fully biodegradable; or (b) 500 mg/L oil (C40H80), which is not biodegradable.
A primary clarifer removes 35% of BOD5 and 55% of suspendedsolids from the incoming wastewater. Calculate the mass of solidsand mass of BOD5 removed in kg/d for a plant processing 4500 m3/dof wastewater with 275 mg/L BOD5 and 400 mg/L SS.
A waste with a 5-day BOD (BOD)=200mg/L and k = 0.1 day¹ is discharged to a river at a rate of 1 m/s. The river has flow rate of 9 m/s and a background ultimate BOD (Lo) of 2 mg/L upstream of the discharge. (a) Calculate the ultimate BOD (Le) of the waste. (b) Furthermore, assuming instantaneous mixing after discharge, calculate Lo of the river water after it has received the waste. Ans.: (a) Ultimate BOD of wastewater = 508.3 mg/L, (b) Ultimate BOD of river water after discharge of waste-52.63 mg/L.
Problem: 1. Design a facultative pond to treat (13500)gpm of sewage having (13500/20)mg/L of BOD. The average summer and winter temperature is 43oC and 13oC, respectively. Convert the same pond into aerated lagoon, if the concentration of influent BOD reaches to (13500)mg/L. 2. Determine the diameter of a trickling filter for a wastewater flowing at the rate of (13500)m3/day. The influent BOD (So) concentration for the wastewater is (13500 * 10)mg/L, whereas desirable effluent BOD should be as per NEQS.
An industry generates 4 million gallons per day (MGD) (that is 15,000 m^3/ day) of liquid industrial wastewater having BOD5 of 1000 mg/L and first order reaction rate constant of 2.0/day. Because of the high BOD, there is a plan to build an industrial pre-treatment system at an industrial park. Effluent from the pre-treatment will be discharged into the city sewer for final polishing at the city wastewater treatment plant. Determine: a. Percent BOD removal if the wastewater is treated in one 5000 m^3 continous flow stirred tank reactor. b. Percent BOD removal if the wastewater is treated in one 5000 m^3 plug flow reactor. c. Percent BOD removal if the wastewater is treated in one 2500 m^3 continous flow stirred tank reactor followed by one 2500 m^3 plug flow reactor. d. Percent BOD removal if the wastewater is treated in one 2500 m^3 plug flow reactor followed by one 2500 m^3 continous flow stirred tank reactor. e. Percent BOD removal if the wastewater is treated in one 2500 m^3…
Please calculate the theoretical OD, COD, and ultimate BOD of a wastewater containing (a) 500 mg/L acetate (CH3COOH), which is fully biodegradable; or (b) 500 mg/L oil (C40H80), which is not biodegradable.
Assume that a large stream has a reoxygenation constant k1' of 0.4/day, a flow velocity of 5 miles/h, and at the point of pollutant discharge, the stream is saturated with oxygen at 10 mg/L. The wastewater flow rate is very small compared with the stream flow, so the mixture is assumed to be saturated with dissolved oxygen and to have an oxygen demand of 20 mg/L. The deoxygenation constant k1' is 0.2/day. What is the dissolved oxygen level 30 miles downstream?
calculate the metal dosing to treat 10,000 m3d-1 of municipal wastewater with 8 mg-P L-1 considering Al2(SO4)3*18H2O.
The wastewater contains 7.5 x 105 fecal CFU per liter. The maximum permissible fecal coliform concentration is 3500 fecal coliform CFU/L. Determine the length of pipe required if the linear velocity of the wastewater pipe is 0.75 m/s. Assume the reaction rate constant for the destruction of the fecal coliform is 0.24 per min.

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