A Low-Temperature and Low-Pressure Distillation Plant for Dairy Wastewater

The paper investigates an alternative treatment plant for the typical wastewater effluent of a cheese-making industry, mainly composed acid or sweet whey mixed with washing-water. Two variable parameters have been considered during tests: four temperatures (39, 46, 53 and 60 °C) three solid content values (30%, 50% 70%) concentrated product. minimum maximum removal efficiency (pollutant amount into concentrate related to raw whey) range from 94.6% 97.7% conductivity, 98.3% 99.5% BOD5, 98.7% 99.6% COD 98.2% 99.3% Total Nitrogen. capacity ranges about 2 L/h (at 39 6 processed whey. On basis experimental findings, proposed purification technology has demonstrated its suitability both purify recover high-quality products (e.g., protein concentrate, lactose), thanks low thermal damage on treated product relatively energy consumption 0.4 kWh/L 1.0 whey, Coefficient Performance approximately 0.6 up 1.5.