Table 2 Cost estimation of aerated HC process
Category | Items | Value | Unit |
|---|---|---|---|
General | Required time for desired removal | 31.54 | min |
Number of passes | 106.46 | ||
Cost of treatment | 1.27 | $/m3 | |
Volumetric flow rate of pump needed | 0.56 | m3/s | |
Venturi | Throat velocity | 22.93 | m/s |
Area of throat | 0.02 | m2 | |
Throat diameter | 0.18 | m | |
Throat length | 0.18 | m | |
Water velocity in pipe | 0.92 | m/s | |
Area of water pipe | 0.61 | m2 | |
Diameter of water pipe | 0.88 | m | |
Energy dissipation in the HC process | 227,813.98 | kJ | |
Pump power needed | 171.96 | kW | |
k constant | 8.29 | ||
Water pipe diameter | 34.80 | in | |
Total diameter of pipe | 38.67 | in | |
Water pipe length | 104.40 | in | |
Cost of the venturi | 16,973.98 | $ | |
Air injection | Required Air flow rate | 2000.00 | m3/h |
Air velocity in pipe | 5.66 | m/s | |
Area of water pipe | 0.10 | m2 | |
Diameter of air pipe | 0.35 | m | |
Air compressor power needed | 1.40 | kW | |
Cost of the Air pipe (Equal to venturi) | 16,973.98 | $ | |
Capital cost | Total capital cost | 112,663.96 | $ |
Amortised capital cost | 9079.18 | $ | |
Electrical cost | Energy consumed in a year | 33,174.36 | kWh |
Annual electricity cost | 6634.87 | $ | |
Chemicals and cooling water cost | HCl cost per year for pH adjustment | 815.78 | $ |
Amount of water needed | 0.79 | m3/s | |
Water needed in a year | 542,495.36 | m3 | |
Water cost in a year | 10,849.91 | $ | |
Total chemicals and cooling water cost | 11,665.68 | $ | |
Labour cost | Annual sampling labour | 156.00 | h |
Total annual labour time | 456.00 | h | |
Annual labour cost | 15,960.00 | $ | |
Analytical cost | Annual analysis of labour | 156.00 | $ |
Annual analysis cost | 10,140.00 | $ | |
Part replacement cost | Annual part replacement cost | 1126.64 | $ |
Total cost | Total annual O& M cost | 44,711.42 | $ |
Total annual operating cost | 53,790.60 | $ | |
Total water treated in a year | 3640.00 | m3 | |
Cost of water treatment | 14.78 | $/m3 |
