摘要：Direct discharge of black water (BW) without treatment to the natural environment causes problems for the environment. The present research aimed to examine the impact of direct disposal of BW on the municipal wastewater (MWW) and surrounded soil characteristics in the BW disposal site in Erbil City- Kurdistan Region (KR) Iraq. To check the effect of BW on the boarded MWW and the soil; BW MWW BW mixed with MWW (BWMWW) polluted soil and clean soil samples were collected and analyzed. Samples of BW MWW and BWMWW were tested for 32 physical-chemical and biological quality parameters such as pH turbidity solids color dissolved oxygen five day biochemical oxygen demand (BOD5) chemical oxygen demand (COD) ammonia oxidation-reduction potential (ORP) sulphate oil and grease phosphate Most probable number (M.P.N.) of coliform Thermo tolerant M.P.N. E.Coli …etc. In contrast soil samples were tested for 37 parameters for instance pH ORP organic matter (OM) sulfite Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Arsenic Rubidium Strontium Yttrium Zirconium Molybdenum Silver Cadmium Mercury Lead Thorium and Uranium. Results revealed that the direct disposal of BW without treatment commonly affected on the MWW and the surrounded soil characteristics. Potential treatment processes and solutions for BW disposal were presented.
