Drying the sludge is more conducive to the utilization and final disposal of the sludge. The utilization and disposal of dried sludge is divided into five aspects:

1. Agricultural application (organic fertilizer, realized by composting)

2. Building materials (brick and fiberboard)

3. Sludge gas utilization (can be used as fuel)

4. Landfill

5. Throw into the sea