Removal of Cyanobacteria and Green Algae by Serratia sp.
HONG Guiyun
ZHU Hui
WANG Tao
MA Shaoxiong
Abstract：The blooms caused by eutrophication have a serious impact on the water environment.The method of removing algae from eutrophication by microorganisms has a broad prospect.In this study,a strain of algaeclytic bacteria Serratia sp.,isolated in the laboratory,was added into the algal fluids of cyanobacteria(Aphanizomenon flosaquae)and green algal(Scenedesmus quadricauda)commonly found in eutrophic water respectively.The changes of algal biomass,Chl-a,pH,total nitrogen and total phosphorus in the algal fluids were monitored,and the algaeclytic products were analyzed by spectroscopic technology.The results showed that the algaeclytic bacteria Serratia sp.had better algaeclytic effect on both species,and the higher the concentration,the better the algae-soluble effect.The removal rates of Chl-a in the experimental group with the addition of protobacterial solution were 64.3%and 85.1%respectively,and the algal cell density decreased by 71.4%and 83.9%respectively.The total nitrogen in algal liquid decreased by 17.84 mg/L and 10.82 mg/L,and the total phosphorus decreased by 7.75 mg/L and 5.68 mg/L,respectively.The total nitrogen removal effect was better.It was preliminatively concluded that the algaeclytic products contained N-H,O=N-O-(-NO2),C-H,C-N,C-O,CH2 and other bonds.Combined with the three-dimensional fluorescence scanning results,it was preliminatively concluded that the algaeclytic products were tryptophan-like substances and fumeric-acid like substances.
Keywords：algaeclytic bacteria Serratia sp.Aphanizomenon flosaquaeScenedesmus quadricaudaalgaecolysis product
Publication Date：2023-12-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 65-71 )