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Annual cost comparison for polymer selection
- Cost driver
- What to include
- Purchase price
- Price per kg of active polymer, not just delivered product
- Make-up losses
- Overdosing, rinse water, residual product, and preparation losses
- Storage footprint
- Bag store, pallet space, IBC area, bunding, tanker access
- Handling labour
- Receiving, unloading, lifting, mixing, cleaning, supervision
- Equipment investment
- Dissolution system, ageing tank, dosing skids, dust control
- Comparison method
- Convert all costs to annual cost per kg active polymer
2% to 8%
Typical range of avoidable handling losses in poorly controlled powder systems
5% to 15%
Annual labour and cleaning cost share that can be material on staffed sites
1 to 3 m²
Small footprint increase that can matter in compact polymer rooms
10% to 30%
Typical total cost spread between forms after all annual factors are included
| Cost element | Powder polymer | Emulsion polymer |
|---|---|---|
| Purchase cost | Price per kg active | Price per kg active |
| Make-up losses | Bag residue, dust, incomplete dissolution | Line residue, pump priming, ageing losses |
| Labour | Bag handling, cleaning, supervision | Unloading, connection, monitoring |
| Storage | Dry store, pallet space | Bunded tank, IBC or tanker access |
| Equipment | Dissolver, ageing tank, dust extraction | Storage tank, transfer pump, dosing system |
| Utilities | Mixing energy, water | Pumping, mixing |
| Annual total | Sum of all items | Sum of all items |
Practical rule of thumb
If powder saves money on procurement but creates a dedicated handling room, extra labour, and longer preparation time, the annual cost advantage may shrink quickly. If emulsion reduces staffing and fits a compact closed layout, the higher purchase price can still be economical over a full year.
What to calculate before choosing
- Annual active polymer demand
- Delivered product concentration and real active content
- Number of deliveries and unloading method
- Floor area used for storage and preparation
- Preparation losses, dust losses, and residual volumes
- Energy, maintenance, and cleaning effort
- Depreciation or rental cost of polymer equipment
- Cost per kg active polymer over 12 months
Is powder always cheaper than emulsion polymer?+
No. Powder often has a lower purchase price per kg active substance, but the total annual cost can rise once labour, dust control, preparation time, and equipment are included.
What is the best way to compare products fairly?+
Use one annual cost model for both forms and convert every cost item to a cost per kg of active polymer. That avoids misleading comparisons based only on invoice price.
Does plant layout really influence polymer cost?+
Yes. A poor layout can increase unloading time, manual handling, storage footprint, and cleaning effort, all of which affect the annual cost.
Equipment we supply for this
Engineering Hub: get this sized for your plant
Describe your goal, effluent limit or sludge volume and receive a technology shortlist plus a sizing proposal – by email, no phone call required.