![Hydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease Separator
1 System Grease Separator (YSWSTW)(YSWSTW)(YSWSTW)(YSWSTW)
2 Application Free overfall on sharp crested weir without any side contraction
3 Formula Weissbach Equation:
Q = 2/3 · µ · b · (2g)
1/2
· [(v
2
/ 2g)
3/2
- (v
2
/ 2g)
3/2
]
Variables mPD Water Channel m
1 Q Volumetric flow rate, m
3
/s 0.0105530.0105530.0105530.010553 m
3
/s
2 µ discharge coefficient, dimensionless 0.6351840.6351840.6351840.635184 - 4.7367
3 g acceleration due to gravity 9.819.819.819.81 m/s2
overfall 0.0367 h
4 v mean velocity 0.0127270.0127270.0127270.012727 m/s
5 h overfall height 0.0367 m weir 1 M
6 b width of channel (weir) 0.80.80.80.8 m 3.7
7 M height of the weir crest above the headwater bottom 1 m 0.8
Design Parameters
1 Q0 Sewage Flow 912 m3
/day = 0.010555556 m
3
/s
2 L0 FSL at the entrance of GS 3.7 mPD
3 M + h weir + overfall 1.03671.03671.03671.0367 m
4 L1 FSL at the exit of GS 4.73674.73674.73674.7367 mPD
5 V0 Capacity of GS at L0 52.67 m3
6 V1 Capacity of GS at L1 76.4104376.4104376.4104376.41043 m3
7 vb Bubble rising velocity 0.350.350.350.35 m/s (The equipment suplier defined)
8 n No. of GS chamber in operation 1111
Surface Scum Scrapper Induced Air Aerator
FSL Influent Channel Effluent Channel Effective Volume
1000
5.20 mPD
4.74 mPD 76.41 m3
3.70 mPD M 52.67 m3
14.73 m3
1.9 mPD
1.4 mPD
Grease Separator
2500 mm
4000 mm
5400 mm
The depth for the bubble reaction = 4.74 m
Bubble rising time = 13.53 s
Wastewater detention time = 7238.883 s ( 120.648 mins )
Bubble reaction time = 1395.474 s ( 23.25789 mins )](https://image.slidesharecdn.com/0d389811-9062-4ece-bfeb-9c9c2bb54c58-150129031753-conversion-gate02/85/Head-Loss-on-Weir_Modification_Rev2-1-320.jpg)
Head Loss on Weir_Modification_Rev2
- 1. Hydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease SeparatorHydraulic Head Calculations on the Grease Separator 1 System Grease Separator (YSWSTW)(YSWSTW)(YSWSTW)(YSWSTW) 2 Application Free overfall on sharp crested weir without any side contraction 3 Formula Weissbach Equation: Q = 2/3 · µ · b · (2g) 1/2 · [(v 2 / 2g) 3/2 - (v 2 / 2g) 3/2 ] Variables mPD Water Channel m 1 Q Volumetric flow rate, m 3 /s 0.0105530.0105530.0105530.010553 m 3 /s 2 µ discharge coefficient, dimensionless 0.6351840.6351840.6351840.635184 - 4.7367 3 g acceleration due to gravity 9.819.819.819.81 m/s2 overfall 0.0367 h 4 v mean velocity 0.0127270.0127270.0127270.012727 m/s 5 h overfall height 0.0367 m weir 1 M 6 b width of channel (weir) 0.80.80.80.8 m 3.7 7 M height of the weir crest above the headwater bottom 1 m 0.8 Design Parameters 1 Q0 Sewage Flow 912 m3 /day = 0.010555556 m 3 /s 2 L0 FSL at the entrance of GS 3.7 mPD 3 M + h weir + overfall 1.03671.03671.03671.0367 m 4 L1 FSL at the exit of GS 4.73674.73674.73674.7367 mPD 5 V0 Capacity of GS at L0 52.67 m3 6 V1 Capacity of GS at L1 76.4104376.4104376.4104376.41043 m3 7 vb Bubble rising velocity 0.350.350.350.35 m/s (The equipment suplier defined) 8 n No. of GS chamber in operation 1111 Surface Scum Scrapper Induced Air Aerator FSL Influent Channel Effluent Channel Effective Volume 1000 5.20 mPD 4.74 mPD 76.41 m3 3.70 mPD M 52.67 m3 14.73 m3 1.9 mPD 1.4 mPD Grease Separator 2500 mm 4000 mm 5400 mm The depth for the bubble reaction = 4.74 m Bubble rising time = 13.53 s Wastewater detention time = 7238.883 s ( 120.648 mins ) Bubble reaction time = 1395.474 s ( 23.25789 mins )