Study On Controling Phosphorus And Removing Algae By Phoslock-coagulant

Reduction of phosphorus content in water is one of the critical control of eutro phi cation. Phoslock by agents of the active ingredient fixed phosphate in water and formed the precipitation, which adsorption capacity was 10 mg P/g, and through joint coagulant removed algae. The study focus on adopts Phoslock and coagulant control measures to reduce the phosphorus content of the water column and inhibit the release of phosphorus in sediments, thereby inhibiting the abundance and structure of phytoplankton, so as to achieve the purpose of restoration of eutrophic water.The study focus on Phoslock (new Phoslock and Phoslock(?)) and coagulant (diatomaceous earth, aluminum chloride, calcium hydroxide) control landscape water which is eutrophication simulation experimental results show that the efficiency of a single dosage new Phoslock retention was 55%?68%, while the new Phoslock joint diatomaceous and aluminum chloride reached 70%?87%, which has a significant increase (P<0.05). Furthermore, in this research, the removal efficiency of TP and phytoplankton increases with the dosage of new Phoslock increases. In the biological abundance of phytoplankton, each experimental group has significantly reduced, which inhibition rate was 56%?73%. The new Phoslock be jointly diatomaceous and aluminum chloride group is best in algal efficiency, reaching more than 70%.Various forms of phosphorus content in sediment, Fe/Al-P content decreased, reducing about 10.60%?15.75%, Ca-P content increased markedly, an increase of 11.89%?45.07%. The results showed that after adding the reagent, the sediment phosphorus to a more stable form transitionIn order to explore the influence of sediment microalgae after dosing Phoslock and coagulant, the study conducted three sediment microalgae recovery simulation experiment. The results showed that the average inhibition rate of Shanzi reservoir experimental group was 53.34%?74.73%, the average inhibition rate of Xipi reservoir experimental group was 39.57%?63.12%, the average inhibition rate of Shuikou reservoir experimental group was 41.77%?66.04%. Simultaneously, new Phoslock Joint diatomaceous and aluminum chloride group had more excellent algal efficiency, which inhibition rate was 51.45%?66.70%. But limited water source as the water surrounding residents of particularity, it is recommended to dosage of new Phoslock joint diatomite. Through the case and the estimates show that in the implementation of the project application, the Phoslock agent dosage in addition to phosphorus loading in the processing area, which is usually also related with depth. And in order to avoid over d-osing a lake with a P-capping agent, an initial'low dose'should be applied. At the same time from the water environment, the measure of new phoslock joint diatomite is better, and can get better p-fixation aitricial effect. When the new Phoslock and diatomite dosage was 0.060 kg/m3, the removal rate of phosphorus in water is 65%, and the algae is 70%,the sediment microalgae recovery inhibition rate was 60%. Compared to the traditional estimation method, the proposed method can save about 44% of the cost, and is 0.91 yuan/m3. The research results show that phoslock-coagulant purification technology suitable for controlling eutrophic lake, and it will enrich the regulation of our country for eutrophication water bodies, provided a feasible and effective way of governance for the eutrophic lake water.