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Tutorial BioWin

The document is a tutorial on biological phosphorus removal using Biowin, detailing various system parameters and tasks for modeling and analysis. It includes multiple questions focused on calculating effluent concentrations, optimizing system components, and evaluating the impact of temperature on treatment processes. The tutorial aims to guide users in understanding and applying biological treatment methods for wastewater management.

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Ajith Rajapaksha
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194 views4 pages

Tutorial BioWin

The document is a tutorial on biological phosphorus removal using Biowin, detailing various system parameters and tasks for modeling and analysis. It includes multiple questions focused on calculating effluent concentrations, optimizing system components, and evaluating the impact of temperature on treatment processes. The tutorial aims to guide users in understanding and applying biological treatment methods for wastewater management.

Uploaded by

Ajith Rajapaksha
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Biowin Tutorial 1

Question 1

You are tasked with biologically removing phosphorus in the existing tankage to alleviate the
problems in the tertiary chemical precipitation system. Given the system characteristics, model
and analyze the biological phosphorus removal process in Biowin, considering the following:

Unaerated reactors: Four (each 1 MG) Depth = 12 ft


Aerated reactors: Two (each 7.5 MG) Depth = 12 ft DO = 2 mg/L
Clarifier (Ideal): Area = 123,000 ft² Depth = 14 ft
Influent: Average Flow = 88 MGD
COD = 246 mg/L TKN = 24 mgN/L
TP = 5.4 mgP/L ISS = 15 mg/L
Alkalinity = 6 mmol/L
Wastewater fractions: fBS = 0.12 fUP = 0.07
fUS = 0.10 fNA = 0.75
RAS recycle: 44 MGD (50%)
NML recycle: 264 MGD (300%)
Wastage rate: 1 MGD (constant rate)
Temperature: 18°C
Nitrification rate: 0.8 /d
Question 2

Influent System

Parameter Value
Parameter Value
Aerator Volume 4000 m³
Flow rate 35,000 m³/d
Aerator Depth 4.5 m
BOD 127 mg/L
Aerator Width 15 m
Total Kjeldahl Nitrogen 40 mg/L
Clarifier Volume 20,000 m³
Total Phosphorus 6.5 mg/L
Clarifier Depth 4.0 m
TSS 150 mg/L
Clarifier Underflow 15,000 m³/d
VSS 100 mg/L
Splitter flow – waste 500 m³/d

1. Find the BOD, TKN, P, TSS, and VSS in the effluent.


2. If BOD can be 15 mg/L, how small can the aerator be?
3. Back to 4000 m³, how much can the underflow be reduced and achieve 15 mg/L?
Question 3
Influent System

Parameter Value
Parameter Value Aerator Volume 5000 m³
Flow rate 45,000 m³/d Aerator Depth 6m
BOD 150 mg/L Aerator Width 20 m
Total Kjeldahl Nitrogen (TKN) 55 mg/L Clarifier Volume 25,000 m³
Total Phosphorus (P) 8 mg/L Clarifier Depth 5m
TSS 170 mg/L Clarifier Underflow 18,000 m³/d
VSS 120 mg/L Splitter flow – waste 700 m³/d

1. Calculate the effluent concentrations of BOD, TKN, P, TSS, and VSS using Biowin based on
these parameters.
2. Optimize the clarifier underflow and splitter flow – waste such that the effluent Total
Phosphorus (P) is reduced to 4 mg/L. How does this affect the BOD in the effluent?
Question 4
Influent System
Parameter Value
Parameter Value
Flow rate 10,000 m³/d
TF Volume Proposed 900 m³
BOD 127 mg/L
TF Depth 4.5 m
Total Kjeldahl Nitrogen 40 mg/L
Clarifier Volume 20,000 m³
Total Phosphorus 6.5 mg/L
Clarifier Depth 4.0 m
TSS 150 mg/L
Clarifier Underflow 500 m³/d
VSS 100 mg/L
Require 15 mg/L CBOD and 1.0 mg/L DO.

1. Evaluate proposed TF volume. Determine required TF volume.


2. If the water temperature is 15°C, then how big must the TF become?
3. Add anaerobic sludge digester at 35°C for 30 days. How do sludge characteristics change?
4. If the digester operates at 40°C how much smaller can the digester become to achieve the same
result?

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