Pilot Trials Results
ONGC Khambhat
Sample 1
Sample 2
ONGC Sample 1
| No. | Characteristic | Result – Pre treatment | Result – Post treatment | % Difference |
| 1 | pH at 32 deg. C | 7.29 | 9.64 | -32.24 |
| 2 | Suspended Solids | 4.4 | 1.4 | 68.18 |
| 3 | Oil & Grease | 44.22 | 1.22 | 97.24 |
| 4 | COD | 2,816.00 | 110.38 | 96.08 |
| 5 | BOD (Cal) | 1,609.14 | 63.06 | 96.08 |
| 6 | Chloride as CL¯ | 5,964.00 | 71 | 98.81 |
| 7 | Salinity as NaCl | 9,840.60 | 117.15 | 98.81 |
| 8 | Carbonate as CO3¯² | Nil | Nil | Nil |
| 9 | Bicarbonate as HCO3¯ | 1,632.82 | 241.56 | 85.21 |
| 10 | Sulphate as SO4²¯ | Nil | Nil | Nil |
| 11 | Sulphate as S¯ | 2.50 | Nil | 100.00 |
| 12 | Calcium as Ca²+ | 84.00 | Nil | 100.00 |
| 13 | Magnesium as Mg²+ | 70.47 | 17.01 | 75.86 |
| 14 | Sodium as Na+ (Cal) | 4,246.26 | 104.88 | 97.53 |
| 15 | Total Hardness | 500.00 | 70 | 86.00 |
| 16 | Total Dissolved Solids (TDS) | 11,988.00 | 404.35 | 96.63 |
| 17 | Fluoride | 2.12 | 1.7 | 19.81 |
ONGC Sample 2
| No. | Characteristic | Result – Pre treatment | Result – Post treatment | % Difference |
| 1 | pH at 32 deg. C | 7.1 | 9.01 | -26.90 |
| 2 | Suspended Solids | 56 | 1 | 98.21 |
| 3 | Oil & Grease | 9.01 | 0.44 | 95.12 |
| 4 | COD | 2,006.51 | 296 | 85.25 |
| 5 | BOD (Cal) | 1,146.57 | 169 | 85.26 |
| 6 | Chloride as CL¯ | 4,828.00 | 53.25 | 98.90 |
| 7 | Salinity as NaCl | 7,966.20 | 87.86 | 98.90 |
| 8 | Carbonate as CO3¯² | Nil | Nil | Nil |
| 9 | Bicarbonate as HCO3¯ | 1,825.12 | 295.24 | 83.82 |
| 10 | Sulphate as SO4²¯ | 63.45 | 28.03 | 55.82 |
| 11 | Sulphate as S¯ | Nil | Nil | Nil |
| 12 | Calcium as Ca²+ | 48.00 | Nil | 100.00 |
| 13 | Magnesium as Mg²+ | 29.16 | 31.59 | -8.33 |
| 14 | Sodium as Na+ (Cal) | 3,705.76 | 99.45 | 97.32 |
| 15 | Total Hardness | 240.00 | 130 | 45.83 |
| 16 | Total Dissolved Solids (TDS) | 10,436.00 | 507.56 | 95.14 |
| 17 | Fluoride | 4.96 | 0.21 | 95.77 |