Venue – Water Treatment Plant (Delhi Jal Board), Sonia Vihar, New Delhi
Date – 15 October, 2015
School of Engineering, G.D. Goenka University organised an educational trip to Water treatment plant of Delhi Jal Board based in Sonia Vihar, New Delhi on 15 October, 2015. A group of 22 students of 1st year B. Tech (Mechanical) and faculty members, Dr. Mayurika Goel and Mr. Deepak Jain from School of Engineering visited the plant.
Water treatment plant (Capacity: 140MGD) situated in Sonia Vihar is one of its kind which is equipped with the latest technology and a testing laboratory which ensures a regular monitoring of water quality keeping the issues of operational efficiency and environmental sustainability. This is one of the largest Projects taken by the French firm “Degremont” in India. The project is developed with the state of the art technology which is fully automated (SCADA Controls). On reaching plant, Executive Engineer, Mr. Diwan Chand gave a warm welcome and the Plant Manager, Mr. Girish gave introduction on the need of water treatment process. He explained the working of the plant and the various steps involved in getting the purified water. He also instructed about the precautions to be taken by the students during the plant tour. Afterwards, Engineer Prabhat Kumar started the visit of the plant with the pump house which receives water from upper Ganga canal and river Yamuna which is followed by Cascade aerator cum mixing chamber. The purpose of aerator is to increase the availability of oxygen in water and remove any harmful volatile gases. The next step is the settling of sludge through three big settlers. The water is then passed through distribution chambers in pulsators. The filtered water thereafter is exposed to a calculated amount of chlorine for removal of pathogenic bacteria and algae. Finally sludge is removed through coagulation with alum & poly aluminium chloride and remaining water is recycled through a waste water recovery unit. Around 495 MGD of recycled water is made available for irrigation, horticulture and other domestic non drinking supply through preserving water by creating artificial wetlands using aquatic plant root zone.
It was an enlivening experience in which the students got a chance to get themselves familiar to the practical knowledge of the different stages of water purification. Finally Engineer Prabhat Kumar took students in the Chemistry Laboratory where the Chemist briefed students about the primary and secondary standards of water required for drinking purpose. It also regularly calculates the dose of coagulant required to add during sludge thickening and chlorine required for disinfection purposes. Disinfection is a very important step in treating water for drinking purposes. Around 20 different confirmatory tests are carried out including analysis of dissolved solids, turbidity, hardness, alkalinity, minerals, permissible range of heavy metals, and presence of pathogenic bacteria in water.
This visit was to enhance the knowledge of Engineering Chemistry, Water treatment, Water quality testing among the students and help them understand the process of converting raw water into drinking water. The interaction with the Board officials also enlightened students on the deteriorating condition of water bodies like Yamuna river in specific. The visit was an informative experience satisfying the curiosity of engineering students and also helped in creating an environmental awareness among them.