The TDS values of treated water from URHA generally increased
with increase in URHA loading. However, the TDS values obtained
from water treated using PRHA showed inconsistency in the control
pattern as initial increase was observed but thereafter
decreased and then increased again, this continued to the end of
the tests. Further study will be carried out to see how lower TDS
can be achieved using the RHA without compromising the turbidity
removal capacity of the ash samples. This study is crucial in
order to establish the application of RHA for the treatment of water
used for domestic purposes in the rural areas.