Raw wastewater samples were collected at random from industrial dairy plant. This dairy plant manufactures a variety of dairy products in a semi hydrated or dehydrated form (i.e., butter, ghee, sweetened milk and milk powders) where technological wastewater is a mixture of two streams coming from powder plant and various processing units. Two fat traps A and B are the part of the effluent treatment plant of the dairy. After removal of fats both the streams are equalized in equalization tank and then it is supplied to the anaerobic digester. The samples of wastewater are collected from this point i.e., digester inlet.