Study the efficiency of selected Chlorophyta species for removing pollutants from municipal wastewater

The study was conducted to demonstrate the feasibility of using algae, separately or in combination, as an additional step in bioremediation of wastewater, and their ability to remove or reduce pollutants and improve water quality. The following algae species were selected: Chlorella Pyrenoidosa, Scenedesmus dimorphus, and Chlamydomonas Snowii for bioremediation of wastewater and measuring some physical and chemical properties of wastewater after discharging from the treatment plant. When using algae individually, the results showed the highest removal percentages across all measured parameters, s includingpH, electrical conductivity E.C. (µs/cm) , { dissolve oxygen, biological oxygen demand, total alkaline , total Hardness, calcium( Ca), magnesium ( Mg) , and nutrients (NO۳ and PO۴)} mg/L byusing C. Snowii with values of (۶۴%, ۸۱%, ۴۶%, ۱۰%, ۴۰%, ۳۶%, ۴۵%, ۳۲%, ۵۳%, and ۷۲%) , respectively, while the lowest removal percentage of properties by using C. pyrenoidosa, with the values of (۴۸%, ۶۹%, ۳۳%, ۴%, ۲۸%, ۲۵%, ۳۱%, ۲۲%, ۳۱%, and ۵۲%) respectively. Thus, the arrangement of algae when used separately in bioremediation was as follows: (C. Snowii, S. Dimorphus, then C. pyrenoidosa). The results also recorded that the triple mixture of algae showed removal percentage of all properties higher than the use of algae separately in the treatment, as the total removal percentage of (۷۳%, ۸۸%, ۵۸%, ۳%, ۵۳%, ۴۹%, ۶۲%, ۴۴%, ۶۵%, and ۷۶%), respectively. The study concludes that bioremediation using algae has reduced the physicochemical properties of wastewater and improved its quality. The study also showed that a mixture of three algae could reduce pollutants more effectively than using them alone. Therefore, it is preferable to use algae as a first step in bioremediation or as an additional step after treatment.

کلیدواژه ها:

Municipal wastewater ، Bioremediation ، Chlorophyta ، Biodegradation