Study on Zero Liquid Discharge for Waste Water Treatment of a Yeast Industry

Pollutants must be removed from the water to protect the environment and public health. When water is used by the industry, the water becomes contaminated with pollutants. If left untreated, these pollutants would negatively affect the water and environment. Treatment of waste water is an essential process that prevents contamination and the destruction of water way, drinking water resources and natural resources. Waterborne diseases are also eliminated through proper wastewater treatment. Wastewater is approximately ninety-nine percent water and only one percent solids. The removal of these solids and disinfection of the water before discharge is the basic concept of wastewater treatment. Zero discharge plant has many advantages in comparison with the older methods used for treatment. One of the Yeast unit generates effluents, it can discharge effluents into the CETP (Common Effluent Treatment Plant) per day. So it has been decided to treat all the effluents in their plant itself and recycle maximum water by installing zero discharge units. Treatment of effluents is a must as per UPPCB (Uttar Pradesh Pollution Control Board) norms. Effluent to comply the norms it has been incorporated of UPPCB a zero discharge unit which recycles all the water from waste effluents and discards only solid wastes. In this paper the detailed study on zero discharge system of Yeast Plant has been done. It is observed that by implementing zero discharge concept Yeast plant is able to utilize all recovered water in its utility unit.