The use of constructed mangrove wetlands to remove ammonia in domestic waste water

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University of Dar es Salaam
Coastal area of Tanzania is faced with disposal of huge amount of untreated sewage, NVIliCh is being released into mangrove ecosystems. Few studies have been carried out and little is known on the effect of it, thus little is known on the environmental consequences of the present discharge situation (Holguin, et al). The effect of these mangrove ecosystems to wastewater is not yet known. This research will use two mangrove species which are common in coastal of East Africa to find out how much pollutants from domestic wastewater can be removed. Constructed wetland planted with two species of mangroves common in coastal area of Tanzania namely Avicenna marina and Rhizophora macronata were used in the experiment to establish ammonia removal efficiency. Results showed that the micro organism's activities were at their maximum activities after nine days. It showed also twelve hours inundation was more effective. . The results showed that ammonia can be removed both in planted and unpianted cells between 0% to 80% by the use of constructed mangrove wetlands as well as wetland soil and this range from 0 mg/L to 4 mg/L of ammonia. Cells planted with Avicenna marina showed higher removal followed by cells planted with Rhizophora macronata. This technique of using mangrove wetland to removal pollutants in domestic sewage is relatively a new approach. It was concluded that constructed mangrove wetlands can be used as a less expensive technique to clean domestic waste water. Recommendations were made for farther study on constructed mangrove wetlands.
Available in print form, East Africana Collection, Dr. Wilbert Chagula Library, Class mark (THS EAF TD756.5.M554)
Constructed wetlands, Constructured wastewater treatment wetlands, Ammonia
Mlingi, A.N(2008) The use of constructed mangrove wetlands to remove ammonia in domestic waste water, Master dissertation, University of Dar es Salaam.