India is the second-largest producer of sugar. There are over 530 sugar mills in the country, and a significant chunk of sugar production (80%) happens in UP, Maharashtra, and Karnataka.
Sugar industries generate large amounts of pollution load, particularly in terms of suspended solids, organic matter, press mud, bagasse pith and bagasse fly ash. The change of water chemistry is the main associated environmental impact of discharging the sugar mill’s effluent on an open water body. Wastewater from sugar mills with its high Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) rapidly deplete available oxygen supply when discharged into water bodies,
Discharge of water with a high Total Dissolved Solids (TDS) level would have an adverse impact on aquatic life, render the receiving water unfit for drinking and domestic purposes, reduce crop yields if used for irrigation, and exacerbate corrosion in water systems and pipes.