Assessment of Al Hamza wastewater sampling and analysis: Diwaniyah governorate

This paper is to evaluate the qualities of wastewater in the Alhamza district of the Al-Diwaniyah Governorate. Forty wastewater samples were collected from November 19 to December 25, 2022, in order to examine numerous wastewater quality characteristics, including (pH, TSS, COD, BOD, Total Kjeldahl Nitrogen, phosphorus, and E. Coli). These samples were collected from the Al Hamza sewer system area, which includes the two existing wastewater lifting stations, Al Waely and Al Hussein, as well as the gravity sewer network, trunk lines in the east and west of town, and septic tanks not connected to the main sewer trunk, and the results were compared to Iraqi standards. According to the results, the concentrations of COD in all areas were higher than the maximum amount allowed by the Iraqi standard of 100 mg/l. But the level of BOD5 at all sites was higher than the maximum allowable limit for Iraqi standards, which is 40 mg/l. TKN concentrations in all areas were within the allowable limits of Iraqi standards of 50 ppm as NO3, pH values in all samples were within the acceptable limits of Iraqi standards. TSS concentrations have exceeded the Iraqi allowable limits of Iraqi standards of 60 mg/l. this research illustrates that the P concentrations of forty samples were within the acceptable limits of 3 ppm as PO4. In the first week, moderate growth of E. coli has been recorded at location 1, scanty at location 2, and heavy growth at other 8 locations. The remaining five weeks, record heavy growth concentrations of E. coli. at all locations except for location 11, which indicates negative levels of E. coli. Finally, the results were analyzed using the ArcGIS 10.8 program through maps, which showed each parameter distribution and compared it with Iraqi standards in all the study areas.