Validity of Primary Treated Wastewater for Irrigation and Assessment of their Potential Health Risk

Abstract Samples of raw waste water is taken from the municipal sewer Sumail district in Iraqi Kurdistan region and submitted to primary treatment by aeration evaluate their validity for irrigation potential health risks associated with this treated wastewater, Result revealed, (BOD) improved mechanical aeration, (COD) not enough bring it safe ranges. Ammonia NH 4 reduced 24 18 mg/L as converted nitrite nitrate nitrifying bacteria two-week period. removed about 2 third TSS, TDS increase electrical conductivity water. 567 142 mg/l aerating weeks. The content heavy metal all studied plants almost cases are more than those irrigated tap fresh drinking essential micronutrients Mn, Cu, Fe Zn study were elevated but remain within permissible limit plant. Target hazard quotient (THQ) cadmium wheat > 1 cancer appearance children very high. Whereas lead worse has >1 risk if been wastewater or even wastewater.