African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5211

Full Length Research Paper

Performance evaluation of cyanobacteria removal from water reservoirs by biological method

Sakine Shekoohiyan1,2, Amir Hossein Mahvi 3,4,5*, Mahmood Alimohammadi3, Ali Reza Mesdaghinia3, Ramin Nabizadeh3 and Reza Dabbagh6
1Department of Environmental Health, Research Center for Social Determinants in Health Promotion, Hormozgan University of Medical Science, Bandar Abbas, Iran. 2Department of Environmental Health, Persian Gulf Fertility and Infertility Research Center, Hormozgan University of Medical Science, Bandar Abbas, Iran. 3School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. 4National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran. 5Center for Solid Waste Research, Institute for Environmental Research, Tehran University of Medical Sciences, Tehran, Iran. 6Institute of Nuclear Science and Technology, Iran.
Email: [email protected]

  •  Accepted: 14 May 2012
  •  Published: 23 April 2013


 With the rapid growth of urbanization, the discharge of industrial, agricultural and municipal wastewater into water resources is increasing. Cyanobacteria are a dominant component of the phytoplankton that causes problems in water reservoirs. The aim of this study is to evaluate the performance of bacteria in the removal of cyanobacteria algae from water reservoirs. In this study, a biological method with four types of bacteria was applied for algae removal. First of all, species of cyanobacteria were identified, and then their specific medium BG-11 was prepared. The species of bacteria (Pseudomonas aeroginosaEnterobacter aerogenesKlebsiella oxytoca, and Citrobacter freundii) were used for removing cyanobacteria for a period of 0 to 10 days. Variables such as chlorophyll a, nitrate, phosphate, dissolved oxygen, heterotrophic plate count, and algal cell count were measured during the study period. The results of the present study showed that P. aeroginosa and C. freundii were effective for the removal of chlorophyll a in the first five to six days of the study period with removal efficiency of 63.5 and 56.59% respectively. The other parameters such as phosphate, nitrate, and algal cells decreased relatively. This method is relatively efficient and effective for removing algae from water resources and can be used for removing nutrients and cyanobacteria algae from water resources.  


Key words: Algae, biological, biotechnology, cyanobacteria, water.