Environmental Health Engineering and Management Journal

en Comparison ability of algae and nanoparticles on nitrate and phosphate removal from aquaculture wastewater تخصصي Special مقاله اصیل Original Article <div style="text-align: justify;">Background: Aquaculture wastewater contains high levels of phosphate and nitrate. The reuse of this water requires standards beyond the secondary standards to eliminate more organic pollutants from aquaculture effluents. In this research, the removal of these pollutants from wastewater using Chlorella vulgaris and Fe3O4 nanoparticles in the reactor space was investigated. Methods: This study was conducted on fish farms effluent in the laboratory system. For this purpose, a 5-L semi-industrial reactor with a mixer blade, porous plate, and a compressor was designed. Chlorella vulgaris samples were collected from the natural environment and cultured in the laboratory environment. Also, Fe3O4 nanoparticles were prepared from Iranian Nano Pishgaman Company to make the desired solution. During the experiment (3 weeks), samples were taken weekly (in one phase) from the effluent. Dissolved oxygen (DO), pH, nitrate (NO3), and phosphate (PO4) factors from the influent and effluent of the farms were measured. The statistical data were analyzed using SPSS version 21 and Excel 2013. Results: The amounts of nitrate and phosphate were decreased by about 80.76 and 80.55% in the biological reactor, whereas these amounts were 70.52 and 70.48% in the nanoparticle reactor, respectively. Also, there were significant differences in the amounts of NO3 and PO4 between the control treatment and weekly treatment (P < 0.05). Conclusion: Based on the results, both reactors were able to reduce nitrate and phosphate from aquaculture wastewater, but the efficiency of the biological reactor was higher than that of the nanoparticle reactor.</div> Nitrate, Phosphate, Fe3O4 nanoparticle, Chlorella vulgaris, Biological refinement 171 177 http://ehemj.com/browse.php?a_code=A-10-1-144&slc_lang=en&sid=1 Majid Askari Hesni mahesni@gmail.com 10031947532846005544 10031947532846005544 Yes Corresponding author: Research and Technology Institute of Plant Production, Shahid Bahonar University of Kerman, Kerman, Iran Seyed Aliakbar Hedayati hedayati@gau.ac.ir 10031947532846005545 10031947532846005545 No Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Amir Qadermarzi a.qadermarzi@gmail.com 10031947532846005546 10031947532846005546 No Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Mojtaba Pouladi mojtabafishery1987@gmail.com 10031947532846005547 10031947532846005547 No Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran Somayeh Zangiabadi majidask@gmail.com 10031947532846005548 10031947532846005548 No Department of Plant Biology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran Nabat Naqshbandi saadatfar.amir@gmail.com 10031947532846005549 10031947532846005549 No Department of Biology, Faculty of Sciences, Payame Noor University, Oshnavieh, West Azarbaijan, Iran