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Nitrogen and Phosphorus Removal in Effluent from the Fish Culture farm by Using Water Lettuce, Pistia stratiotes  

박종호 (충청북도내수면연구소)
이원호 (충주대학교 건설도시공학과)
조규석 (충청북도내수면연구소)
황규덕 (충청북도내수면연구소)
Publication Information
Journal of Aquaculture / v.16, no.4, 2003 , pp. 252-256 More about this Journal
Abstract
Effluent from farm trefish contained high concentrations of nitrogen and phosphorus, such kinds of nutrients were released to the environment without proper treatment and thses increased the pollution of the environment. We evaluated the conventional treatment system with cost effective ecotechnologies for the removal of nutrients. Water lettuce chambers were investigated under the various experimental conditions to improve the efficiency of N&P removal and the treatment of from aquaculture effluent. In this research, six water lettuce chambers (80 liter each) received combination of aquaculture wastewater effluent at hydraulic retention times (HRTs) of 1, 2, 4 and 8days. The water lettuce chambers operated at a 8 day HRT investigated for aquaculture effluent (1'st) showed average removal efficiency, BOD, T-N, T-P of 92.8, 79.0 and 93.6% on average respectively.
Keywords
Nitrogen & Phosphorus removal; Water lettuce; Hydraulic retention time;
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