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Effect of contact time on CPO's color at bentonite 3.0%.
| Contact time (minutes) | Color (R/Y) |
|||
|---|---|---|---|---|
| CPO-1 | CPO-2 | CPO-3 | CPO-4 | |
| 0 | 24R/24Y |
22R/22Y |
21R/21Y |
20R/20Y |
| Contact time (minutes) | Color (R/Y) |
|||
| RBDPO-1 | RBDPO-2 |
RBDPO-3 |
RBDPO-4 |
|
| 15 | 4.2R/42Y | 5.1R/51Y | 6.4R/64Y | 7.0R/70Y |
| 30 | 3.6R/36Y | 4.6R/46Y | 6.0R/60Y | 6.6R/66Y |
| 45 | 3.1R/31Y | 4.0R/40Y | 5.2R/52Y | 5.9R/59Y |
| 60 | 2.5R/25Y | 3.4R/34Y | 4.5R/45Y | 5.0R/50Y |
Note: R = Red, Y = Yellow.
