Purification of Eucheuma gelatinae on nitrogen and phosphorus and effect on the level of chlorophyll a in eutrophic seawater
LI Chun-qiang, YU Xiao-ling, WANG Shu-chang, PENG Ming
Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Haikou 571101, China
Abstract：The ability of Eucheuma gelatinae purifies nitrogen and phosphorus and the control of microalgae biomass in eutrophic seawater was studied. The results showed that DIN and PO4-P can be eliminated efficiently by E.gelatinae in eutrophic seawater. The elimination effect of DIN and PO4-P was obvious after 72 h and 24 h respectively. Compare with the uptake of nitrate nitrogen and nitrite nitrogen, E.gelatinae preferentially absorbs ammonia nitrogen. The content of chlorophyll a in seawater can be control by E.gelatinae. The level of chlorophyll a achieved to the lowest value after 144 h and didn't rise back when the density of E.gelatinae was up 4 kg/m3. Therefore, E.gelatinae is one of the most ideal macroalgae in tropical sea to seawater purification and red tide control.
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