Abstract
Information on wetland function in waste water treatment is very important as the information can be used to remove undesirable qualities of water. The aim of the study was to assess the effectiveness of natural wetlands in the treatment of waste water. The study was carried out for a period of four months (November 2012 to February 2013). Four sampling site were selected within the wetland and water samples were collected twice every week. Standard methods for sampling, storage and analysing according to APHA were used. Statistical analysis informs of T-test (2-tailed) and ANOVA were used to summarize the findings. The study revealed that the wetland played a role in the removal of pollutants where the best performance was obtained at TSS removal efficiency of 97.67%. BOD, Chromium, Nitrate, Total Solids, and Phosphate ranged between 50- 96% while conductivity and Total Dissolved Solids were less than 50%. DO increased by 23.4% and pH changed by -0.79% hence the effluent water was less acidic as compared with influent water. The study concluded that Tibia wetland was effective and had potential in treatment of the waste water from the discharging facilities. It is recommended that wetlands can be conserved and used as waste water treatment facility instead of regarding them as waste land. Measures should be put in place to improve the final effluent quality to ensure that the levels of the parameters in the effluent are within the permissible limits.
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