Table 1 shows information about the disposal of processed solid sewage sludge in a European region in 2012 and 2024.
Table 1
| Year | Used as fertiliser (millions of kg) | Sent to landfill (millions of kg) | Incinerated (millions of kg) | Other methods (millions of kg) | Total (millions of kg) |
|---|---|---|---|---|---|
| 2012 | 580 | 240 | 160 | 120 | 1100 |
| 2024 | 1220 | 25 | 380 | 75 | 1700 |
Calculate the percentage of processed solid sewage sludge that was incinerated in 2024. Give your answer to 3 significant figures.
State the biological treatment process used respectively for: