The examination of the seasonal influence on the efficiency in oil and fats removal through primary treatment from the wastewater of edible oil industry

Abstract

This paper investigates the influence of the seasonal change of the air temperature, chemical oxygen demand as well as efficiency of suspended matter removal on the efficiency of oil and fats removal (h, %) during primary treatment. The parameters are monitored in the period of time from 2006 to 2011. The efficiency of oil and fats removal in the first and in the fourth quartal is proportional to the efficiency of the removal of suspended matter and of total organic matter, measured as chemical oxygen demand (COD). The measured values for oil and fat are: ? (IV quartal) = 0.96 % - 50.8 % and ? (I quartal ) = 5.06 % - 95.97 %. The efficiency of oil and fats removal in the second and third quartal is proportional to air temperature so the measured efficiency of fat and oil removal are, ? (II quartal) = 3.93 % - 82.86 % and ? (III quartal) = 6.82% - 71.51%. The results of investigation have shown the existence of the correlation between the air temperature during various seasons and the efficiency of the oil and fats removal (h, %) as well as the removal of the suspended matter and chemical oxygen demand (COD).