Let's analyse which industry contributes the largest amount of wastewater to the Ganga river in Uttar Pradesh (U.P.). Industrial wastewater is a major source of pollution in rivers, and different industries generate varying quantities and types of effluent.

Industrial Wastewater Generation in Ganga Basin

The Ganga basin is home to numerous industries. Uttar Pradesh, being a significant state in the basin, hosts various industrial sectors, including chemical, pulp and paper, sugar, and distilleries. Each of these industries generates wastewater with specific characteristics.

Evaluating Wastewater Contributions

We need to consider the volume of wastewater generated by each industry listed in the options:

• Chemical Industry Wastewater: Chemical industries produce diverse types of wastewater, often containing toxic pollutants. The volume varies greatly depending on the specific processes involved.
• Pulp and Paper Industry Wastewater: The pulp and paper industry uses large volumes of water in its processes (pulping, bleaching, paper making). This results in the generation of significant quantities of wastewater, typically high in suspended solids, organic matter, and sometimes bleaching chemicals.
• Sugar Industry Wastewater: Sugar mills operate seasonally and generate wastewater primarily during crushing season. This wastewater is generally high in organic load (BOD/COD) but the overall annual volume compared to continuously operating, high-water-consumption industries might be less.
• Distillery Wastewater: Distilleries also generate wastewater, mainly spent wash, which is highly polluting with a very high organic load. While the concentration of pollutants is high, the total volume generated by distilleries compared to industries like pulp and paper can be lower in the overall context of total wastewater discharge into the Ganga.

Identifying the Highest Wastewater Generator in Ganga in U.P.

Studies and reports on industrial pollution in the Ganga basin consistently identify certain industries as major contributors to wastewater volume. Among the options provided, the Pulp and Paper industry is known for its high water consumption and consequently, high wastewater generation volume. While other industries like distilleries and chemical plants contribute highly polluting wastewater, the sheer volume discharged by paper mills is often considerably larger, making them significant contributors to the total wastewater load in the river in areas where they are concentrated, such as parts of Uttar Pradesh.

Therefore, based on the typical characteristics and scale of operations of these industries situated along the Ganga in U.P., the Pulp and Paper industry generates the highest amount of wastewater.

Revision Table: Industry Wastewater Summary

Additional Information on Ganga Pollution and Wastewater

Efforts to clean the Ganga river focus heavily on controlling industrial pollution. Various initiatives involve setting up Common Effluent Treatment Plants (CETPs) or ensuring individual industries treat their wastewater to meet prescribed standards before discharge. The volume of wastewater is a crucial factor in assessing the overall pollution load, alongside the concentration of pollutants. High volume discharges, even with moderate pollutant concentrations, can still contribute a significant amount of total pollution (load = volume x concentration). This is why industries generating large volumes, like Pulp and Paper, are often highlighted in studies on river pollution.