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voima toolbox
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Calculations

Recommendations
UASB check-list: hydraulic parameters
Disc filtration system Hidrosolo
Estimated time for manual use of gate valves
Flow estimate: horizontal / inclined tube
Poulation growth: Arithmetic rate
River Self-Purification: Streeter-Phelps Method
Water grit chamber
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Net Present Value (NPV)

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Input data

Cash flow

Units

Interest rate

Output data

Net present value