Isolation and Screening of Three Algicidal Bacterial Strains and Their Bioremediation Effect on Eutrophic Water Bodies

摘要

To study the control effect of algicidal bacteria on blue-green algal blooms in natural conditions, three algicidal bacterial strains were used to make a compound algal inhibiting agent, and the removal effects of the algal inhibiting agent on algae, nitrogen, phosphorus, organic matter, and chlorophyll a in Chendian pool and Qiangwei pool of Quancheng Park in Jinan City were analyzed. The results show that the algal inhibiting agent could eliminate the blue-green algal blooms. 54 days later, chlorophyll a content in the water bodies reduced to below 0.06 mg/L, and both CODCr and BOD5 decreased significantly. NH4+ -N and TP content were lower than 2 and 0.05 mg/L respectively. The removal rate of CODCr was slightly low (33% -4 8 % ), and the removal rates of other indicators were higher than 60%. It is clearly seen that the algal inhibiting agent could quickly eliminate the algal blooms and had a notable effect on the recovery of the eutrophic water bodies.