Phytoremediation Rates of Water Hyacinth in an Aquaculture Effluent Hydroponic System
Conventional wastewater treatment plants of activated carbon, electrodialysis, ion exchange, reverse osmosis etc. are expensive to install, operate and maintain especially in developing countries; therefore, the use of aquatic macrophytes for wastewater purification is a viable alternative. On the first day of experimentation, approximately 100g of water hyacinth was introduced into the hydroponic units in four replicates. The water quality parameters measured were total suspended solids (TSS), pH and electrical conductivity (EC). Others were concentration of ammonium–nitrogen (NH4+-N), nitrite-nitrogen (NO2--N), nitrate-nitrogen (NO3--N), phosphate–phosphorus (PO43--P), and biomass value. At phytoremediation intervals of 7, 14, 21 and 28 days, the biomass recorded were 438.2 g, 600.7 g, 688.2 g and 725.7 g. Water hyacinth was able to reduce the pollutant concentration of all the selected parameter. The percentage reduction of pH ranged from 1.9% to 14.7%, EC from 49.8% to 97.0%, TDS from 50.4% to 97.6%, TSS from 34.0% to 78.3%, NH4+-N from 38.9% to 85.2%, NO2--N from 0% to 84.6%, NO3--N from 63.2% to 98.8% and PO43--P from 10% to 88.0%. Paired sample t-test shows that at 95% confidence level, it can be concluded statistically that the inequality between the pre-treatment and post-treatment values are significant. This suggests that the use of water hyacinth is valuable in the design and operation of aquaculture effluent treatment and should therefore be adopted by environmental and wastewater managers.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1123727Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1184
 Jim, M (2003) Aquaculture professional organization: The future of Nigeria aquaculture industry in the land. A paper presented on 18th Annual Conference of the Fisheries of Nigeria (FISON), Owerri, 8th-12th December, 2003.
 Ezenwa, B and Anyanwu, P. E (2003) Water recirculatory system technology as a major tool for increased fish production by private fish farmers. Proc. Of the 18th Annual Conference of the Fisheries of Nigeria (FISON), Owerri, 8th-12th December, 2003.
 Davies, R. M., Davies, O. A., Inko-Tariah, M. B and Bekibele, D. O (2008) The mechanization of fish farm in Rivers State, Nigeria. World Applied Science Journal 3(6): 926-929.
 Adebayo, I. A and Adesoji, S. A (2008) Comparative assessment of the profit margin of catfish reared in concrete tank and earthen pond. African Journal of Agricultural Research Vol. 3 (10), pp 677-680.
 Schwartz, M. F. and Boyd, C. E. (1994) Effluent quality during harvest of channel catfish from watershed ponds. The Progressive Fish-Culturist,56 (1): 25-32.
 Jung, K.H (2002) Treatment of wastewater from livestock rearing with aquatic plants. Tech Bulletin. National Livestock Research Institute (NLRI) Republic of Korea.
 Snow, A. M and Ghaly, A. E (2008) Use of barley for the purification of aquaculture wastewater in a hydroponic system. American Journal of Environmental Sciences. Vol. 4(2): 89-102.
 Skillicorn, P., Spira, W and Journey, W (1993) Duckweed Aquaculture: A new aquatic farming system for developing countries. International Bank for Reconstruction and development. World Bank. p 49.
 Grodowitz, M.J. (1998) An active Approach to the use of Insect Biological control for the management of Non-native Aquatic plant. J. of Aquatic plant management 36:57-61.
 Kiridi, E. A (2013) Mathematical Modelling of the Phytoremediation Rates of Some Tropical Aquatic Macrophytes in an Aquaculture Effluent Hydroponic System. Unpublished Ph.D Thesis. University of Ilorin, Ilorin. Nigeria. pp157.
 Lawson, T.B (1997) Fundamentals of Aquacultural Engineering. New Delhi.