ASSESSMENT OF FILTER EFFICIENCY IN RECYCLING WASTEWATER FOR IRRIGATION PURPOSES USING PHYSICOCHEMICAL PROCESSES IN SEMEL DISTRICT/DUHOK-KR, IRAQ

This study was carried out to evaluate the efficiency of filter, for improving some physicochemical properties of wastewater. The wastewater sample was collected from the final meeting out let point of municipal wastewater network of Semel district and treated physically through precipitation, aeration and filtrated through a sand filter containing activated charcoal. The both wastewater (before treating) and filtrated water samples (after treating) were analyzed for (pH, EC, TDS, TSS, temperature, turbidity, DO, COD, BOD, cations (Ca, Mg, Na, and K) and anions (Cl, SO4, CO3, HCO3 and NO3), P, SAR, SP, RSC. The results indicated that the filter was efficient in reducing the turbidity (98.55) % while its efficiency for removing phosphorous from wastewater was the low (5.08) %. The filter efficiency for reducing (EC, TDS, and TSS) were (35.08, 35, and 68.21) % respectively. When for COD and BOD were (38.03 and 39.29) % respectively. The efficiency of filter for reducing the cations and anions from the wastewater ranked following trend (Cl= 57.53> Ca= 47.06> Mg =32.61> SO4 =17.97> K= 8.05 > Na= 5.10) %. Salinity potential responds to filtration better than sodium adsorption ratio and residual sodium carbonate which was reduced by 47.88%.