Design a Wastewater Treatment Plant - Engineering Assignment Help

Assignment Task

Question 1:
Design a wastewater treatment plant for 250,000 people to treat wastewater with average daily sewage flow of 200 liters per capita. The treated effluent shall meet the reported standards of less than 10 mg/l for suspended solids, 10 mg/l for BOD, 10 mg/l for total nitrogen, and 1.0 mg/l for phosphorous. Use the type of process as explained in the sections below. Any unit can be subdivided into few compartments.
Influent characteristics:
* BOD = 394 mg/l
* TSS = 454 mg/l
* TKN = 60 mg/l
* Waste temperature is 25oC
* No primary settling is required
* Use CNPLib
* VSS/SS = 0.75
* Soluble BOD: 170 mg/l
* COD = 1000 mg/l
* Soluble COD = 600 mg/l
* Soluble ortho-phosphate = 15 mg/l
* SOR = 40.7
* Soluble inert organic material = 30 mgCOD/l
* Ammonium/TKN ratio = 0.65
* Soluble substrate/BOD ultimate = 0.30
* XCOD/VSS ratio = 2.2
* Use default values for other parameters.
1. Determine effluent TSS, BOD, TKN, P, TN, DO,
2. Determine the SRT, wasted mass flow, and F/M ratio using the DEFINE Function in GPS-X.
3. After you finish the design, apply a Sinusoidal flow pattern and run to determine the effect on effluent parameters.
You are requested to prepare a well-documented report of the results concentrating on analysis of the output and how reasonable it is. 

Question 2: Oxidation Ditch Process

• Use CNPLib

• Use ASM2D model for tanks

• Use simple1d for clarifier

• Influent flow is 4400 m3/d, BOD = 395 mg/l, TSS = 435 mg/l, TKN = 78 mg/l, and TP = 10 mg/l. Determine the sizes of the tanks and the air requirements to achieve the following:

suspended solids of less than 10 mg/l, BOD5 less than 10 mg/l, total nitrogen of less than 10 mg/l, and phosphorous of less than 1.0 mg/l. Use mechanical surface aerators with entering mechanical power.

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