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Effect of different addition proportion of lime on the sludge stability.
| Lime addition proportion | Fecal coliform bacteria (MPN·100 g−1) | Water content | pH | Sense of odor |
|---|---|---|---|---|
| 5% | nd* | 61.8% | 12.1 | Easily smell slight odor |
| 10% | nd | 57.3% | 12.5 | Narrowly smell slight odor |
| 15% | nd | 56.2% | 12.6 | Narrowly smell slight odor |
| 20% | nd | 54.6% | 12.8 | Narrowly smell slight odor |
*nd: no detection.
