| Sample No. |
Ratio (Sludge/Waste) |
Initial voltage (mV) at 2nd day |
Peak voltage (mV) |
Peak voltage duration (day) |
Final voltage (mV) at 60 days |
| I |
1:2 |
2 |
350 |
27 |
111 |
| II |
2:1 |
218 |
263 |
21 |
178 |
| III |
1:1 |
346 |
416 |
13 |
153 |
| IV |
Only OWa |
918 |
918 |
2 |
243 |
| V |
Only SSb |
794 |
960 |
13 |
590 |