التغيرات في الصفات الطبيعية و الكيميائية لمياه الصرف الصحي من محطة المعالجة بمكة المكرمة على طول مجرى الصرف

Abstract EN

The physical and chemical characteristics of the wastewater effluent from Makkah wastewater treatment plant was investigated.

The effluent is disposed into Wadi Uranah southeast of the Holy City.

Water samples were picked up on monthly basis from six locations evenly distributed along the wastewater stream for a period of six months.

The analysis of the wastewater included the determination of electric conductivity (EC), suspended solids (SS), total solids (TS), total volatile solids (TVS), pH, biochemical oxygen demand (BOD5), ammonia nitrogen (NH3-N), total phosphorus (P), chloride (Cl—), dissolved sodium (Na), calcium (Ca), potassium (K) and the sodium adsorption ratio (SAR).This study showed that many of the measured parameters did not meet the requirements of the Saudi Meteorology and Environmental Protection Administration (MEPA) regulations for the direct discharge of wastewater.

The quality of the wastewater along the stream render it suitable only for restricted irrigation.

The natural purification process on the wastewater along the stream was only effective for certain parameters (BOD, S.S and P).