The different scopes of upgradation for an SSF / RSF based water treatment plants needs to be explored to ensure supply of safe drinking water. Upgradation of a water treatment plant might be necessary due to many reasons as follows:
(i) Expiry of the design period.
(ii) Increase of coverage area resulting in increase in demand.
(iii) Population increase
(iv) Changes in raw water qualities
(v) Changes in scopes / natures of treatment etc.
So what are the practical scopes for this purpose? What are the scopes of dual media filtration in this regard?