Over recent years many membrane plants have been installed, particularly for Cryptosporidium and colour removal, and this trend is likely to continue in the near future. A major operating cost for these plants is membrane replacement.
Estimates of membrane life are used to predict future operating costs which are site-specific, have a large impact on whole life cost comparisons and form the basis for contracts with membrane plant suppliers. There is uncertainty in the accuracy of these estimates.
Working with 8 Utilities and suppliers, this WRc research has improved the confidence of such estimates to enable secure predictions of future operating costs and examine cost-effective strategies for membrane replacement.
Other major operating costs (labour, chemicals and power) were also examined and interactions between operating costs evaluated, e.g. chemical cleaning costs and the potential impacts of chemical cleaning on pumping cost and membrane life.
- Reliable estimates of future whole life costs for membrane plant
- Secure strategies for membrane replacement
- Technical information to strengthen performance guarantees between Utilities and plant suppliers.