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  Adderbury, Banbury, UK
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FBDA Design and Budget


General Introduction to the FBDA System Designer


The purpose of this programme is to allow process designers and estimators to produce outline designs and budget estimates for fine bubble aeration systems, allowing rapid evaluation of competing processes and options.
The programme can currently handle ceramic and membrane disc diffusers in rectangular tanks, and requires the following inputs...
    1. SOTR (Standard Oxygen Transfer Rate) in kg/hour.
    2. Dimensions of the aeration tanks, number of lanes and zones.
    3. Oxygen demand taper.
In selecting the number of diffusers for an aeration system, designers must chose between a low efficiency system with a small number of diffusers passing a large volume of air or visa versa. We recommend users select systems with higher efficiencies (e.g. in the range 3-4 kg/kWh) as these normally have far better payback rates.


Designer
Help File

Please do not hesitate to contact us if you need any assistance, want to check your results with us, have an application which falls outside the programmes capabilities, or need a fully optimised, guaranteed, firm quotation.


Reset This Form      Populate With Demo Data

Overall Sizes

Notes

Number of Lanes

     

Select the number of lanes



Anoxic Area
Length = 0.00m

Zone 1
Length = 12.00m
Single sided grid proposed

Zone 2
Length = 12.00m
Single sided grid proposed

Zone 3
Length = 12.00m
Single sided grid proposed

Zone 4
Length = 12.00m
Single sided grid proposed

System Length

(m)

The total length, width and depth should be expressed in metres.

Lane Width

(m)

Water Depth

(m)

Anoxic Detail

Anoxic Area Length

(m)

 

Zone Detail

 

Zone Length
(Zone lengths must equal system length)

Zone Demand
(As a percentage of the  system SOTR)

Zone 1

(m)

%

Zone 2

(m)

%

Zone 3

(m)

%

Zone 4

(m)

%

Zone 5

(m)

%

Demand

System Demand SOTR
(Standard Oxygen Transfer Rate)

kgO/hr

Standard Oxygen Transfer Rate expressed as kg of oxygen per hour.




PLAN VIEW


Lane 1 Zone 1
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 122.5kgO/hr
Single sided grid suggested.

Lane 1 Zone 2
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 94.5kgO/hr
Single sided grid suggested.

Lane 1 Zone 3
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 80.5kgO/hr
Single sided grid suggested.

Lane 1 Zone 4
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 52.5kgO/hr
Single sided grid suggested.

Lane 2 Zone 1
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 122.5kgO/hr
Single sided grid suggested.

Lane 2 Zone 2
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 94.5kgO/hr
Single sided grid suggested.

Lane 2 Zone 3
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 80.5kgO/hr
Single sided grid suggested.

Lane 2 Zone 4
Zone Length : 12m
Zone Width : 10m
Water Depth : 6m
Demand : 52.5kgO/hr
Single sided grid suggested.


RESULTS

Zone 1

D:6.00m L:12.00m W:10.00m CWOD:122.50
Testing 56 combinations
We have found 3 possible solutions.

Option 1
Lower Cost, Lower Efficiency System
Ceramic
Air flow of 4.25 Nm³/hr per diffuser
Density of 2.75 diffusers per m²
total air: 847.43 Nm³/h
air rate: 7.06
power: 21.09 kW
efficiency: 5.81 kg/kWh

Option 5

Ceramic
Air flow of 2.975 Nm³/hr per diffuser
Density of 3.75 diffusers per m²
total air: 808.91 Nm³/h
air rate: 6.74
power: 20.13 kW
efficiency: 6.08 kg/kWh

Option 8
Higher Cost, Higher Efficiency System
Ceramic
Air flow of 2.3375 Nm³/hr per diffuser
Density of 4.5 diffusers per m²
total air: 762.69 Nm³/h
air rate: 6.36
power: 18.98 kW
efficiency: 6.45 kg/kWh

Zone 2

D:6.00m L:12.00m W:10.00m CWOD:94.50
Testing 56 combinations
We have found 3 possible solutions.

Option 1
Lower Cost, Lower Efficiency System
Ceramic
Air flow of 4.25 Nm³/hr per diffuser
Density of 2.25 diffusers per m²
total air: 693.35 Nm³/h
air rate: 5.78
power: 17.26 kW
efficiency: 5.48 kg/kWh

Option 6

Ceramic
Air flow of 2.3375 Nm³/hr per diffuser
Density of 3.5 diffusers per m²
total air: 593.20 Nm³/h
air rate: 4.94
power: 14.76 kW
efficiency: 6.40 kg/kWh

Option 10
Higher Cost, Higher Efficiency System
Ceramic
Air flow of 1.7 Nm³/hr per diffuser
Density of 4.5 diffusers per m²
total air: 554.68 Nm³/h
air rate: 4.62
power: 13.80 kW
efficiency: 6.85 kg/kWh

Zone 3

D:6.00m L:12.00m W:10.00m CWOD:80.50
Testing 56 combinations
We have found 3 possible solutions.

Option 1
Lower Cost, Lower Efficiency System
Ceramic
Air flow of 3.825 Nm³/hr per diffuser
Density of 2 diffusers per m²
total air: 554.68 Nm³/h
air rate: 4.62
power: 13.80 kW
efficiency: 5.83 kg/kWh

Option 6

Ceramic
Air flow of 2.125 Nm³/hr per diffuser
Density of 3.25 diffusers per m²
total air: 500.76 Nm³/h
air rate: 4.17
power: 12.46 kW
efficiency: 6.46 kg/kWh

Option 11
Higher Cost, Higher Efficiency System
Ceramic
Air flow of 1.275 Nm³/hr per diffuser
Density of 4.5 diffusers per m²

Air Rate too low!
This option in not recommended.

total air: 416.01 Nm³/h
air rate: 3.47
power: 10.35 kW
efficiency: 7.78 kg/kWh

Zone 4

D:6.00m L:12.00m W:10.00m CWOD:52.50
Testing 56 combinations
We have found 3 possible solutions.

Option 1
Lower Cost, Lower Efficiency System
Ceramic
Air flow of 3.825 Nm³/hr per diffuser
Density of 1.5 diffusers per m²

Air Rate too low!
This option in not recommended.

total air: 416.01 Nm³/h
air rate: 3.47
power: 10.35 kW
efficiency: 5.07 kg/kWh

Option 6

Ceramic
Air flow of 1.7 Nm³/hr per diffuser
Density of 2.75 diffusers per m²

Air Rate too low!
This option in not recommended.

total air: 338.97 Nm³/h
air rate: 2.82
power: 8.44 kW
efficiency: 6.22 kg/kWh

Option 11
Higher Cost, Higher Efficiency System
Ceramic
Air flow of 1.275 Nm³/hr per diffuser
Density of 4 diffusers per m²

Air Rate too low!
This option in not recommended.

total air: 369.79 Nm³/h
air rate: 3.08
power: 9.20 kW
efficiency: 5.70 kg/kWh



Calculations will be based on a 7" CERAMIC system.
To view calculations based on a 7" MEMBRANE system CLICK HERE

Select the required option for each zone and click continue...