Domestic kitchen wastewater contains significant quantities of fat residues that may insist in blocking home and municipal sewers. This work was designed to remove fat residues from domestic kitchen wastewater using synthetic sawdust filter. Five samples were examined, where the first one was a control. Synthetic filter contained sawdust was used as a removal of fat residues from four different samples of domestic kitchen wastewater. The obtained results showed that the synthetic sawdust filter could remove highest quantities of fat residues having removing capacity ranging from 80.7 ± 5.6 % in sample 1 to 88.5 ± 5.8 % in sample 4. Also, it was found that the mean value of pH, Electric conductivity (EC) and Total dissolved solid (TDS) of domestic kitchen wastewater were significantly affected by filtration process compared with those of control sample. The mean value of pH ranged from 6.61 ± 0.32 in sample 4 to 6.9 ± 0.54 in sample 2. E.C. mean value was varied from 1400.2 ± 262.8 μS/cm in sample 4 to 2100.4 ± 426.5μS/cm in sample 2 while mean value of T.D.S. was lying between 1123.0 ±.142.3 mg/L in sample 4 and 1347.0 ± 210.6 mg/L in sample 2. It seems clearly that sawdust synthetic filter was not affected when it was used for several times with different kitchen wastewater samples and this finding would suggest that this synthetic filter may work efficiently and subsequently may have no significant effects on sewer obstruction phenomena. In addition, all examined wastewater variables (pH, EC, and TDS) in all sample were significantly declined.
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