Volume 13, Issue 2 (2024)
JFST 2024, 13(2): 41-54 |
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Falamarzi J, Ghasemi Z, Nematollahi M A. Investigating the possibility of cattle wastewater treatment using Spirulina (Arthrospira platensis) microalga. JFST 2024; 13 (2) :41-54
URL: http://jfst.modares.ac.ir/article-6-72487-en.html
URL: http://jfst.modares.ac.ir/article-6-72487-en.html
1- University of Hormozgan
2- University of Hormozgan ,zghasemi446@yahoo.com
3- University of Tehran
2- University of Hormozgan ,
3- University of Tehran
Abstract: (746 Views)
Wastewater treatment with microalgae and its reuse is an effective step toward reducing water consumption and preserving water resources. The possibility of growing spirulina microalga on cattle effluents and the possibility of purifying effluents using microalga were investigated. Different concentrations of standard culture medium (Zaruk)-wastewater were used to measure the optimal algal growth on wastewater and to determine the concentration of effluent-Zaruk for optimal algal growth. The treatments were T1 including 100% Zaruk and no wastewater, T2 including 75% Zaruk and 25% wastewater, T3 including 50% Zaruk and 50% wastewater, T4 including 25% Zaruk and 75% effluent and T5 including 100% effluent without Zaruk. Treatments that had more Zaruk, showed more optimal growth, and those that had a higher concentration of effluent often showed a relatively lower growth of algae biomass. The results showed the high growth of algae on the concentrated effluent. T1 with 0.35 and T2 with 0.3 g/liter of dry biomass had the highest biomass of microalgae. T1, T2, T4, T3, and T5 had the highest to the lowest amount of phycocyanin pigment production in microalgae, respectively. The highest removal of nitrate belonged to T5 and T4 with 82.57% and 78.21% removal respectively, and the lowest nitrate removal belonged to T1 and T2 with 57.17% and 70.94%, respectively. The highest removal of phosphate belonged to T1 and T2 with 94% and 92.11% removal, respectively. The lowest removal of phosphate belonged to T4 with 84% removal. Findings indicated the high potential of microalga for treating cattle wastewater.
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