The batch cooker is a horizontal pressure vessel with a heating jacket. For thermal treatment, saturated steam is used. It consists of a steam-heated rotor and a stator. The outer shell of the machine is called a steam jacket, and it is, ensuring, an additional heating surface for cooking or drying animal by-products. The cooker rotor and steam jacket are operating at 6-7 bar. While the pressurized chamber of the batch cooker is working at 3-4 bar. Heat is transferred indirectly and directly from steam to the dried or cooked material, which is continuously mixed and moved along the machine with specially designed paddles welded to the rotor. The steam jacket is equipped with air vent nozzles. The rotor of the cooker is supported by heavy-duty bearings from both sides. Rendering cooker can be manufactured with and without pressure inside the body, fulfilling the 2009/2011 EU animal directive. A batch cooker is a common machine installed in poultry and meat dry rendering plants. The maximum capacity of the machine is less than 3 metric tons per hour. Rendering machines are used for batch cooking, pressure-cooking, hydrolysis, and drying of animal and poultry by-products like meat offal with bones, chicken offal, wet feathers, raw blood, and internal organs. A pressurized chamber can be used in sterilization of any material and for poultry feathers hydrolysis. The cooker can be used for processing products containing hair or wool. It is a machine to process large particles up to 50 mm in small batches. It can operate at a temperature of 133 °C and above for sterilization. A manual or automatic discharge gate can be mounted for pushing raw material out after cooking. For heat effectiveness, different design of agitator constructions is available depending on the material to be processed. Before filling the pressure cooker, the material must be crushed. It has been approved for use in the food industry. Infected or dead animal bodies can be processed at high temperatures and high pressure. Machine design ensures high-quality performance which allows withstanding heavy loads. Low tear and wear secure its long lifetime. The agitator of the batch cooker can rotate in both directions, providing a mixing function and pushing of material out after the cooking process. Pollution System- This system is used to eliminated bad odor from the plant process with some equipments like cyclone , condenser , chemical surubber , cooling tower & bio filter. These equipment are used to filter the odor coming from the batch cooker having bio pollutants.