Water sustainability and re-use: a case study at Amul Dairy, Anand

Abstract

The stringent norms laid down by Pollution Control Boards are forcing Industries to have efficient waste water treatment plants. However, there are no protocols to reduce waste water production to encourage water reclamation and sustainability. The objective of this thesis work is to achieve the same for a dairy industry. In this work, a unique scheme is suggested which leads to reduction in water usage. The result shows that more than 5% of water used per day can be reclaimed. Further, the ETP is modeled and simulated at steady state with feasible modifications that leads to 10% increase in energy that can be harnessed from improved Biogas production rate and 85% reduction in energy usage at the ETP. The possibilities of nitrous oxide emissions, a green house gas, are simulated. The results fall in line with the theory available in literature for the same.