Table 3 CSWW characteristics before and after continuous EC treatment at optimum operating conditions
Parameters | Units | CSWW before treatment | After treatment | % Removal | Discharge limits |
|---|---|---|---|---|---|
pH | 7.1 | 7.87 | – | 6–9 | |
COD | mg L−1 | 4879 | 230 | 95 | 1100 |
BOD | mg L−1 | 2530 | 89 | 96 | 600 |
Colour | Pt–Co | 5610 | 12 | 99 | – |
Turbidity | NTU | 580 | 8.5 | 98 | – |
TDS | mg L−1 | 3018 | 3125 | – | – |
TSS | mg L−1 | 156 | 4.5 | 97 | 800 |
TKN | mg L−1 | 213 | 42 | 80 | 100 |
TP | mg L−1 | 130 | 15 | 88 | 25 |
Oil & Grease | mg L−1 | 66 | 3.6 | 94 | 100 |