The odor compounds removal under low temperature is one of the difficulties in drinking water treatment. In a pilot, the enhanced coagulation sedimentation process and biological filtration was studied, and the effects of permanganate, powdered activated carbon, aeration, filter aid and filter rate reduction were analyzed. The results showed that high concentration of enanthal was the main odor compound in raw water. The 2-methylisoborneol and dimethyltrisulfide were also detected and geosmin was not detected. Permanganate pre-oxidation, powdered activated carbon, coagulation sedimentation and biological filtration could remove odor compounds, among which the removal amount of coagulation sedimentation was the largest and the aeration effect was limited. When the concentration of odor compounds was high, the enanthal was higher than the olfactory threshold. Ozone activated carbon process should be required to further remove enanthal to meet the national standard.