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…

Solid Waste Engineering

3rd Edition

ISBN:9781305635203

Author:Worrell, William A.

Publisher:Worrell, William A.

Chapter2: Municipal Solid Waste Characteristics And Quantities

Section: Chapter Questions

Problem 2.16P

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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
Question 1. A 200 L/d wastewater flow containing only unbiodegradable soluble and particulate organics is fed to a 35L activated sludge reactor, the waste flow from which is 5.83L/d. If the filtered and unfiltered COD concentrations of influent are 45 and 475 mg COD/L respectively, what is the VSS concentrations in the reactor if the COD/VSS ratio of the particulate organics (fcv) is 1.481 mgCOD/mgVSS? And check the COD mass balance over the system. Qw=5.83 L/d Qi=200 L/d 35 L COD=45 L/d (USO) Sti=475 L/d X, UPO+USO
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.
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)
5 ml wastewater is added to a 333 ml BOD flask. The initial dissolved O2 concentration was 13 mg/l and final dissolved O2 concentration was 4 mg calculate the BOD?
The ABC Citizens Waste Water Treatment Plant uses ferric chloride. a) What is it used to remove from the wastewater?b) In which process is the ferric chloride added?
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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
Problem 6. A new manufacturing facility is being located in your town. It plans to produce 2,000 m³/day of a wastewater that consists primarily of water and the chemical phenol dissolved in it at a concentration of 5 mg/L. Phenol has a chemical formula of C,H5OH. The company has asked the municipal wastewater treatment to consider treating this industrial waste. Your plant currently treats 30,000 m³/day with an average influent of 350 mg COD/L. a) Estimate the increase in COD loading (kg COD/day) if you accept the industrial waste discharge? b) Estimate the additional amount of oxygen (in kg O2/day) needed to oxidize the phenol at the treatment plant.
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
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The wastewater from a manufacturing treatment plant is discharged to a municipal 'treatment plant for processing with domestic wastewater. The characteristics of the wastewater from the manufacturing treatment plant are 3500 mg/l BOD, 4500 mg/l SS, 70 mg/l nitrogen and 2 mg/l phosphorous. The characteristics of the domestic wastewater are 350 mg/I BOD, 285 mg/I SS, 50 mg/lN and 11 mg/I P. If the required BOD/N/P weight ratio is 100/5/1, what is the minimum quantity of domestic wastewater required per 1000 gallons of manufacturing wastewater to provide adequate nutrients for biological treatment and the concentration of SS in the combined wastewater?

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