Q4) A small community discharge wastewater at rate of 500 m'/day and specific gravity of (sp.gr 1.05). This wastewater has concentration of dissolved organic matter 1000 mg/L, and suspended solids 1800 mg/L. calculate the amount of dissolved organic matter and suspended solids in kg/hr. Then, find the mass friction of dissolved organic matter and suspended solids.

Q4) A small community discharge wastewater at rate of 500 m'/day and specific gravity of (sp.gr 1.05). This wastewater has concentration of dissolved organic matter 1000 mg/L, and suspended solids 1800 mg/L. calculate the amount of dissolved organic matter and suspended solids in kg/hr. Then, find the mass friction of dissolved organic matter and suspended solids.

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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After primary treatment, a municipal wastewater contains 150 mg/L BOD5. The wastewater flow of 0.44 m³/s (10 MGD) is then treated in an activated sludge system with an SRT of 12 d and an HRT of 6 h. Given the biokinetic parameters tabulated below, determine the aeration volume (m³). Parameter Value 3d¹ 60 mg/L BODs 0.10 d¹ 0.6 mg VSS/mg BOD5 Hmax Ks ka Y
a. 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/l BOD, 285 mg/l SS, 50 mg/l N and 11 mg/l 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? b. What additional of NH4OH and H3PO4 would be required in pounds per million gallons of wastewater to provide the necessary nutrient levels for the treatment of the manufacturing wastewater described above (a) if the domestic wastewater had not been combined with it.
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