Seaweed Extract ECLean As A Treatment For Eutrophic Water

The effect of the seaweed extract Eclean was studied in treating eutrophicated water. The purpose of the experiments is to find a way in dealing with the water eutrophication in China.1. Indoor experiment of treating eutriphcated water with seaweed extract Eclean shows that the TN, TP & NTU were reduced and algae density was descended markedly than the control. Water quality changed apparently in the early days, especially in the early lOdays. The proper concentration of EClean application should be 100mg/L for the V class eutrophication water like the water in Beijing zoo.2. The experiment in treating the eutrophicated water in Beijing Zoo with seaweed extract EClean and combined measures shows that, the water quality in treated area was improved evidently than the control, including Turbidity, TN, TP, COD, and density of algae.3. The experiment in the eutrophicated fishpond in Jinxiudadi proved that the seaweed extract Eclean enhanced the capability of water self-purifying, improved water quality and restrained the growth of blue algae. It also made the fish more active in feeding compared with the fish in control pond.4. The number of ammonifying bacteria, nitrosobacteria, and nitrobacteria got increased in the water treated with seaweed extract. There was also an increasing trend in the number of denitrifying bacteria in aerated-treatment water. This showed that the seaweed extract Eclean could accelerate nitrogen cycle and the release of nitrogen from water, which may be a reason for the lowering of nitrogen in water.5. The experiments also showed that Eclean restrained the growth of some blue algae such as anabaena flos-aquae and Oscillatoria tennis and some green algae such as chlorella. vulgaris. This shows that the seaweed extract Eclean is very important and very useful in controlling the blue algae water bloom.