Loading rate
Hydraulic and solids loading determine media area and backwash frequency.
Industrial water treatment
Industrial Filtration & Clarification Systems
Practical filtration and clarification trains for raw-water conditioning, polishing and pretreatment of downstream treatment systems.
Engineering approach
Match the filter to the contaminant
A sand filter, activated-carbon filter, cartridge filter, bag filter or membrane system does a different job. Selection should follow turbidity, particle size, organics, chlorine, iron, oil and downstream equipment sensitivity.
Process flow
Typical filtration train
1Raw-water screening
2Clarification if needed
3Multimedia filtration
4Activated carbon if needed
5Cartridge / bag filtration
6UF / RO pretreatment
7Polished water
Design & operating considerations
Media selection
Media depth and type should be matched to particle loading and target water quality.
Backwash
Backwash flow and sequence must be sufficient to expand or clean the bed without media loss.
Downstream protection
Fine filtration is particularly important ahead of pumps, membranes, dosing equipment and sensitive process users.
Applications
- RO pretreatment
- Raw-water clarification
- Process water
- Cooling makeup
- Boiler pretreatment
- Industrial water polishing
Support
Services include filter-media audits, vessel sizing review, cartridge and bag-filter selection, backwash troubleshooting and AMC.
Final equipment configuration, chemical dosing and operating targets should be based on actual water analysis, plant load and applicable discharge/process requirements.
Technical resource
Detailed engineering guide
The expanded filtration manual covers filter types, media selection, operating checks and troubleshooting.
Open technical guideFrequently asked questions
Should activated carbon be used on every system?
No. Carbon is useful for certain organic compounds and chlorine removal, but it also adds biological and pressure-drop considerations.
Why does a filter pressure drop increase?
Common causes are accumulated solids, fouling, media compaction, insufficient backwash or inappropriate filtration loading.
Can filtration remove dissolved salts?
Conventional media filters target suspended particles and certain contaminants; dissolved salt reduction generally requires ion exchange, membrane or other specialised treatment.