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| DM WATER COST ESTIMATION | | |
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| Based on the January-2001 data: | | |
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| | Total Water processed = | 109514 | m3 / month | | |
| FAC | | | |
| Power consumption of Filter water pump = | | | 49104 | kwhr / month | | |
| Hence | | | | | | |
| Cost of water at FAC I/L = | 1.80 | Rs / m3 | | | |
| For one Backwashing 30 m3 of water is used & there were | | | | | | |
| 10 regenerations during the month of January | | | | | | |
| Hence Filter water lost per m3 of DM water = | 0.003 | m3 / m3 of DM | | |
| | | | | water | | |
| Therefore | | | | | | |
| Cost of water at FAC O/L = | 1.805 | Rs / m3 | | | |
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| Power consumption in Degasser | | | | | | |
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| | Service | | Power consumption in KWhr | | | |
| | Blower | 3 kw*2*24*31 | 4464 | | | |
| | Pump | 30kw*3*24*31 | 66960 | | | |
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| Total power consumption per m3 of water = | 0.652 | Kwhr / m3 | | |
| Taking the cost of the power as 1Rs/Kwhr | | | | | | |
| Total Power cost per m3 of water = | 0.652 | Rs / m3 | | |
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| Chemicals required in DM chain based on ionic load: | | | |
| Total cation load | | | | | | |
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| | Ca + Mg = | 98 | ppm as CaCO3 | | | |
| | Na = | 50 | ppm as CaCO3 | | | |
| | K = | 4 | ppm as CaCO3 | | | |
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| | Total cation load = | 152 | ppm as CaCO3 | | | |
| | = | 152/50 | milliequivalents of CaCO3/Litre | | | |
| | 1 milliequivalent of CaCO3 will react with 1 milliequivalent of 100%HCL | | | | | |
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| No of milliequivalents of 100%HCL required = | | | 152/50 | meq of HCL /Ltr | | |
| | | = | 3.04*36.5*0.001 | Kg of HCL/m3 | | |
| | | = | 0.11096 | Kg of HCL/m3 | | |
| | 100%HCL density = | | 850 | Kg/m3 | | |
| | 30%HCL density = | | 955 | Kg/m3 | | |
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| Kg of 30%HCL required/m3 of water = | | | 0.11096/0.3 | | | |
| | | = | 0.3699 | | | |
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| | Total Anion load : | | | | | |
| | Chloride = | 32.4 | ppm as CaCO3 | | | |
| | Sulfate = | 27.1 | ppm as CaCO3 | | | |
| | Bicarbonate = | 90 | ppm as CaCO3 | | | |
| | SiO2 = | 10 | ppm as CaCO3 | | | |
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| | Total Anion load = | 159.5 | ppm as CaCO3 | | | |
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| | 100%NaOH density = | 2041.67 | Kg/m3 | | | |
| | 48%NaOH density = | 1500 | Kg/m3 | | | |
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| Kg of 100%NaOH required/m3 = | | 159.5*40*.001/50 | | | | |
| | of water | | | | | |
| | = | 0.1276 | | | | |
| Kg of 48% NaOH required/m3 = | | 0.1276/0.48 | | | | |
| | of water | | | | | |
| | = | 0.2658 | | | | |
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| | Total chemical cost = | 2.83 | Rs /m3 | | | |
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| | Taking 10% water as backwash and rinse water | | | | | |
| | Cost of backwash and rinse water = | | 0.1805 | Rs / m3 | | |
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| | Resin Depreciation cost = | 0.35 | Rs /m3 | | | |
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| | Total DM water cost = | 5.8 | Rs /m3 of DM water | | | |
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| DM water cost based on actual chemical consumption : | | |
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| | 30% HCL Consumption = | 77.72 | MT /Month | | | |
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| | 48%NaOH consumption= | 35.2 | MT /Month | | | |
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| | Actual chemical cost = | 4.205 | Rs / m3 | | | |
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| | Total DM water cost = | 7.2 | Rs / m3 of DM water | | | |
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| If ionic load increases by | 4 | times | | | |
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| | Chemical consumption in PTP = | | 0.997 | Rs /m3 | | |
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| | Filter water cost = | 2.116 | Rs / m3 | | | |
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| | Cost of water at FAC O/L | 2.571 | Rs / m3 | | | |
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| | Total chemical cost = | 11.31 | Rs / m3 | | | |
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| | Total DM water cost = | 16.3 | Rs / m3 | | | |
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| Process Condensate Treatment Cost | | | | | | |
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| Based on March month data | | | | | | |
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| Total water processed in March = | | 109921 | m3/month | | | |
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| | 30% HCL Consumption = | 26.595 | MT /Month | | | |
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| | 48%NaOH consumption= | 18.39 | MT /Month | | | |
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| Total Chemical cost/m3 of PC water | | 1.81 | Rs / m3 of PC water | | | |
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