Study Of Phoslock(?) Plus Diatomite In Field Exclusion For Phosphorus Removal And Algae Control

In this paper,the research on the phosphorus removal and algae control of water based on the combination of Phoslock(?)plus diatomite was carried out by laboratory simulation experiment and field segregation test,so as to provide theoretical and practical reference for eutrophicated body restoration.The effect of Phoslock(?)-diatomite on the recovery of sediment microalgae was studied to explore the feasibility of diatomite to strengthen Phoslock(?).The results showed that,Adding 0.5 times Phoslock(?)combined with diatomite could effectively remove particulate-P and TP.For the sediment microalgae recovery inhibition,Diatomite could enhance Phoslock(?)removal of algae.In summary,Diatomite could enhance Phoslock(?)remove algal and particulate-P as well as cut cost.Therefore,the combination of Phoslock(?)plus diatomite is pratical.The study of appropriate dosages of Phoslock(?)and diatomite showed that,Taking the in-situ water as the research object,The initial SRP of water accounted for 46.74%of TP.After the experiment,58.8 mg/L Phoslock(?)+80 mg/L diatomite(1.2Phl+80DM)group had the best effect of removing phosphorus and controlling algae.TP removal rate was 65.57%,and algae inhibition rate was 74.12%.Taking the sediments-in situ water as the research object for further studied,the initial SRP of water was 77.65%of the TP.1379.52 mg/L Phoslock(?)+40 mg/L diatomite(1.2Ph1l+40DM)group received the best TP removal and algae control efficiency.1.2Phl+80DM did best in inhibiting the release of endogenous phosphorus.In summary,it is recommended that 1.2Phl+80 DM be used for the phosphorus removal and algal control in water,in which the ratio of active phosphorus to total phosphorus is less than or equal to 50%.When water is mainly active phosphorus,accounting for more than 50%of the total phosphorus,1.2Phl+40 DM is more appropriate.Effect of Phoslock(?)plus diatomite on aquatic environment improvement engineering was evaluated by carrying out Phoslock(?)and diatomite in the Dongyaxi Reservoir for phosphorus removal and algae control enclosure experiments during the summer and winter.The preliminary results showed that in the summer,the SRP of Dongyaxi reservoir were 53.03%?62.93%of the TP,1.2Phl+ 40 DM was selected.After the 60 days of the summer experiment,Both Phoslock(?)group and Phoslock(?)plus diatomite group did not achieved significanteffect of phosphorus removal.But Phoslock(?)combined diatomite group had up to 82.95%algal inhibition rate.Phoslock(?)group only had 39.16%algal inhibition rate.After the 30 days of the winter experiment,The algal inhibition rate of Phoslock(?)combined diatomite group and Phoslock(?)group were55.41%and 12.16%respectively.In summary,When phosphorus concentration was 0.03mg/L,Both summer and winter,Phoslock(?)plus diatomite did not achieve significanteffect phosphorus removal,May be the initial concentration of water was low,which made Phoslock(?)is subject to environmental interference(such as humus,oxygen ions et).When phosphorus concentration was above 0.03mg/L,It is needs further study.However,compared to the use of Phoslock(?)alone,Phoslock(?)plus diatomite group's algae control effect was better andhad a lower cost.The results of this study shows that,when the concentration of phosphorus is low,the combination of Phoslock(?)plus diatomite is not suitable.However,for the high conceration phosphorus and high density algae body,The technology has a good prospect in the field of phosphorus removal and and algae control.