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BAF Process Calculator

Date: 2025-11-12
               Hangzhou AquaSust Water Technology Co., Ltd.
            Head ofice: #2808, Baiyue Center, Linping, Hangzhou, Zhejiang, China
               M:+86 152 6746 2807 Email: [email protected] website: www.nihaowater.com  www.chinambbr.com
www.aquasust.com www.aquasustfactory.com
BAF Tank Calculation
Blue block is the design datameter: be filled in
Brown:calculate process data
Red:last result for your process
1. BAF Tank-Parameter
Water quantity Q 2000  m³/d BAF pool area 26.93333333 
Inlet BOD 126  mg/l Number of BAF tanks n 2
Effluent BOD 25  mg/l BAF pool side length 3.669695719 
Volume load 3-5kg/(m³*d) BAF pool side lengthtake 5
Height of packing layer H1 2.5  Generally 2.5-4.5 BAF tank volume 67.33333333 
Distribution chamber height h1 1.2  1.2-1.5 H 5.5 
Supporting layer h2 0.3  0.2-0.3
Clear water area h3 0.8-1.0
Extra high 0.5  0.3-0.5
Packing volume 125  125 
The gas volume can be calculated according to EH
2.When selecting a blower
Q hourly flow inlet BOD outlet BOD carbon equivalent
2000  83.33333333  0.075  0.015  1.6 
Fan air volume m3/min average oxygen demand EA GS(air valume)
3.174603175  0.28  0.15  190.4761905 
3.Backwash air volume
Strength of backwash air volume 0.2-0.8 m³/(m²*min) 13.46666667  m³/min
Water flushing strength 0.5-1.0 m³/(m²*min) 808  m³/h 9.696 
21.6  m³/(m²*h) 581.76 
Number of long-handled filter heads (36 fiter heads per square meter)
969.6  TaizhouZhongchang 36-49 2450 
Number of filter plates 36 filter heads per square
Standard Filter Plate Size 980*980*100
Price
Filter plate is cast inone piece
thicknesses 180mm
1400-1500m2
Filter head 12 yuan/pc
Filter media 1500m³
Single hole aerator 0.28m3/one
680.2721088  50 per unit(cost 22) 0.039592 
25.2576278 
Water dispenser 1900yuan/pcs
4.Based on residence time
T 1.5  h
Upflow velocity m³/h
Effective water depth m
Water volume Q 2000  m³/d
Hourly flow rate 83.33333333 
Number of BAF pools n
Effective volume of pool 125 
Individual pool area 20.83333333  104.1666667 
Individual pool width
ndividual pool length 4.166666667  Take 6.0m
ndividual pool length taken
Packing layer height H1
Distribution chamber height h1 1.2  1.2-1.5
Support layer h2 0.2  0.2-0.3 10L/m²*s
Clear water area h3 0.8  0.8-1.0
Ultra-high 0.3  0.3-0.5
Total height 5.5 
Packing volume 125 
Number of long-handled filter heads 1800  (36-49 filter heads per square meter)
Single hole membrane aerator 1880 
Aeration volume 8.4 
Backwash volume 0.5  atmospheric recoi1 strength>10 L/m²*s 0.6  m³/m²*min
Aeration volume 3.174603175  m³/min
Blower 3.19 
Single Hole Membrane Aerator 683.5714286 
Backwash air volume strength 0.2-0.8 m³/(m²*min) 12.5  m³/min
Water flushing strength 0.5-1.0 m³/(m²*min) 625  m³/h
Number of 1ong-handled fi1ter heads (36 filter heads per square meter)

1500
Backwash air volume strength
Water flushing strength

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