Municipal sludge :
- Biological
- Physico-chemical
- Biomethanization
- Digested sludge
- Primary
- Septage
- Lagoon sludge
- Others
Industrial sludge :
- Metallurgical process
- Residual waters (waste water)
- Bottling waste water
- Brewery waste sludge
- Brewery barley waste
- Rubber residue
- Coal residue
- Others