| dc.description.abstract | The purpose of this study was to investigate and demonstrate a cost-effective treatment
technology for high turbid water, commonly used for domestic purposes in rural areas of
Tanzania where conventional water treatment techniques are not available. A study was
conducted on the water quality status of five permanent earth dams within Monduli district
during the wet and dry seasons, by analyzing physicochemical and microbial characteristics.
The water characteristics of the five earth dams tested were significantly correlated (p < 0.05)
and most of the tested parameters including turbidity and faecal coliform (FC) were above the
Tanzania Bureau of Standards (TBS) drinking water standards. In this study, a pilot-scale
inclined plates settler integrated with constructed wetland (IPS-CW system was tested on
Nadosoito dam water with turbidities ranging from 186 to 4011 NTU. The IPS-CW system
was meant to remove organic matter, nutrients and pathogens, with major focus on turbidity
and FC removal, at the test flow rates of 20, 15, 10 and 5 L/min. The system removed
substantial amount of contaminants, thereby achieving maximum removal efficiency of
95.9% and 94.3% for turbidity and FC respectively. Although using this combination of
technologies in improving drinking water quality is uncommon, nitrate
and biochemical
oxygen demand met the TBS and World health Organization drinking water standards of ≤ 50
mg/l and ≤ 6 mg/L respectively. Due to low production cost and simplicity in operation, the
system can be implemented in rural communities with high turbidity water sources however,
further disinfection is required to ensure zero FC. | en_US |
