Description
Technical Parameters
Aeration and Sand Sedimentation Tank Calculator
The following is Aquasust for you to sort out the correct way to calculate the amount of aeration：
- Blue block is the design datameter : be filled in
- Brown: calculate process data
- greener : last result for your process
1. Aeration Equipment----Design parameters
| 1. Aeration Equipment----Design parameters | |||||
| Design flow rate | Q | 20000 | m3/d | ||
| Total coefficient of variation | Kz | 1.5 | |||
| Design maximum flow rate | Qmax | 30000 | m3/d | 0.35 | m3/s |
2. Aeration Equipment----calculation result
| 2. Aeration Equipment----calculation result | |||||
| Total effective volume of the pool | V=Qmax*t | 45.83 | m3 | ||
| Epidemic time at maximum design flow | t | 2.20 | min | 1~3 | |
| Water flow cross-section area | A=Qmax/v1 | 4.34 | m2 | ||
| Horizontal flow rate at maximum design flow | v1 | 0.08 | m/s | 0.06~0.12 | |
| Total pool width | B=A/h2 | 2.17 | m | ||
| Final take | 2.20 | m | |||
| Design effective water depth | h2 | 2.00 | m | 2~3m | |
| Pool width per cell | b=B/n | 2.20 | m | ||
| Pool width to depth ratio | b/h2 | 1.10 | 1~1.5 | ||
| Number of compartments | n | 1.00 | |||
| Pool length | L=V/A | 10.56 | m | ||
| Final take | 11.00 | m | |||
| Length to width ratio | L:b | 5.00 | Recommended aspect ratio 5：1 | ||
| Total effective volume of pool | V | 45.83 | m3 | ||
| Cross-sectional area of water flow | A | 4.34 | m2 | ||
| Width of sand sedimentation tank opening | b1=2*h3*ctga+b2 | 0.32 | m | ||
| Height of sinker | h3 | 0.10 | m | ||
| Angle between the sloping wall of the sinkhole and the horizontal plane | a | 60.0 | ° | ||
| Width of the bottom of the sinkhole | b2 | 0.2 | m | ||
| Volume of each sedimentation tank | V1=(b1+b2)/2*h3*L | 0.27 | m3 | ||
| Total volume required for sand sedimentation tank | V=(Qmax*x*T*3600)/(Kz*106) | 1.2 | m3 | ||
| Sand sedimentation volume | x | 30.00 | m3/m3 | Sewage | |
| Sand injection time | T | 48.00 | h | ≤48h | |
| Volume required for each sedimentation tank | V`=V/n | 1.20 | m3 | ||
| Height of sloping part of tank bottom | h4=i*[(b-b1)/2] | 0.06 | m | ||
| Over height | h1 | 0.30 | m | ||
| Slope of pool bottom | i | 0.06 | |||
| Total pool height | H=h1+h2+h3+h4 | 2.46 | m | ||
| Air volume required per hour | q=d*Qmax*3600 | 250.0 | m3/h | 4.2 | m3/min |
| Air volume required for 1m3 sewage | d | 0.2 | m3/m3 | ||
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