Environmental Study for Blue green algae Community in different stages in water treatment alkarama station in Baghdad

Abstract

The current study, which was applied to the aquatic ecosystem at the Al-Karama Water Project treatment plant for three months from July to September 2024, addressed the different treatment stages, starting from the river basin, the sedimentation basins, the filter, and finally the chlorinated water tank for three stations. The study included some physical and chemical properties and a qualitative study of blue-green algae. The results of the physicochemical tests showed temperature, turbidity, pH, specific conductivity, free chlorine, hardness, calcium, magnesium, total dissolved solids, and finally, nitrate values. The results showed that all selected water sources had temperatures ranging from 28 to 30 °C. River water turbidity ranged from 32 to 40 NTU, while drinking water turbidity ranged from 0.5 to 3.4 NTU. pH values ​​ranged from 7.4 to 8.2, and free chlorine values ​​ranged from 1.5 to 3.71 mg/L. Calcium and magnesium levels ranged from 67 to 2362 mg/L, while conductivity ranged from 623 to 70 µS/cm². Hardness ranged from 253 to 283 mg/L for river water and drinking water, respectively. Total dissolved solids ranged from 330 to 382 mg/L, and nitrate levels ranged from 0.61 to 1.10 mg/L. Sixteen algal species were identified, most belonging to the phylum Cyanobacteria. These species are the most common in the river basin and its associated ponds and surfaces. Sedimentation, filters, and chlorine tank. These types include: lyngbya nordgaardii wille, Lyngbya taylorii Drouet and Stirickland, Oscillatoria tenuis Oscillatoria tenuis Var.natans Gomont, Oscillatoria tenuis Var.tergestina, Oscillatoria splendida, Oscillatoria amoena, Oscillatoria acutissima, Oscillatoria formosa, Oscillatoria lacustris, Oscillatoria agardhii, Oscillatoria minima, Oscillatoria articulated, Spirulina subsalsa, Aphanocapsa grevillei, Synechococcus aeruginosus.