Different treatment techniques of dairy wastewater

Abstract Dairy Industry is enlisted as one of the top most industries among the entire industries food arena. Apart from high consumption of water in multiple milk products like cheese, curd, butter, yogurt, dry milk powder; dairy industry further involves in some other processes like sanitary, cooling of milk products, cleaning and washing of the processing equipments. During the making and process of these products a large amount of water is used. But the problem with this water is its reuse and toxicity as it cannot be used again as it is. Dairy wastewater treatment is a big issue as dairy wastewater releases a high amount of Chemical Oxygen Demand , inorganic and organic particles, Biological Oxygen Demand and nutrients. Such contaminated water if not handled appropriately, it pollutes water bodies and largely affects our ecosystem and biodiversity. Dairy Industries play important role in the water pollution and the quality of the water. Thus, Suitable treatments for wastewater are required to use effective disposal methods as the large amount of the water is used during the dairy processing and making of milk related products and this large amount of water is not longer useful as it has very high amount of the contaminants which make it non-recyclable. In this review article, it is briefly discussed about the processes in the dairy industry and work done in such processes, amount of wastewater and, major sources of wastewater as well as the harmful effects of wastewater on the environment.