Processes |
Costs for |
Level of skills of operating personnel |
Materials/Procedures necesarry for operation | |
Construction |
Operation | |||
Sedimentation |
1-2 |
1 |
1 |
Regular Cleaning |
Coagulation with |
2-3 |
3 |
2-3 |
Regular supply with chemicals, monitoring |
chemicals | ||||
Coarse filtration |
1-2 |
1 |
1 |
Cleaning at longer intervals |
Rapid filtration (conv.) 3 |
3 |
3 |
Frequent back-washing | |
Slow sand filtration |
2-3 |
1 |
2 |
Regular cleaning |
Chlorination |
1-2 |
3 |
2 |
Regular supply with chemicals, monitoring |
1: low, 2: medium, 3: high