Poor water quality is a major contributing factor to disease in developing countries. Silver coated ceramic pot filters (CPFs) are a relatively common form of household water treatment systems (HWTSs) representing an effective and sustainable technology for poor communities. Water production seems to be the major limiting factor of the CPF's lifetime and sustainability since low flowrates do not produce an adequate daily volume of treated water. This paper describes a long-term study of CPF flowrates under controlled conditions using three different water sources. The relationship between water characteristics and flowrate was assessed with the intent of identifying the principal parameters that impact CPF water production. The study concluded that turbidity seems to be the principal indicator in determining the CPFs lifetime in terms of quantity of treated water. There is no evidence that biological activity also contributes to premature failure of CPFs and the data did not indicate that chemical precipitation is responsible for the filter clogging. Manufacturers commonly conduct initial flowrate tests using clear water as a measure of quality assurance. However, the relation between initial flowrate and average flowrate during the lifetime of the CPF should be further studied.
- ceramic pot filter
- long-term study
- First received 4 April 2015.
- Accepted in revised form 6 July 2015.
- © IWA Publishing 2015