Visit to STP Delawas

Visit To Sewage Treatment Plant, Delawas

The department of Biotechnology , IIS University recently organized an educational visit to Sewage Water Treatment Plant on 20^th  October 2015 for the UG and PG students of Biotechnology and Microbiology.  The visit was organized on the initiative and guidance of Dr Sreemoyee Chatterjee and Dr Radhika Sharma. The students left the college for visit on 20 October at 10 am. The destination was ‘Sewage Treatment Plant’  Delawas a unit of JMC. The plant handles 62.5 MLD load of domestic sewage which is approx. 60-70% of the total load. At the plant, the students carefully studied and observed the complete process of sewage water treatment, functions of its components, and concept of ‘waste to energy’. Officials at STP guided the students regarding different aspects of treatment of sewage water and gave satisfactory answers to different questions raised by the students. The Plant is based on conventional activated sludge process with diffused aeration system. The sludge is handled in anaerobic digesters. Digested sludge is pumped to centrifuge unit where it is converted to semi solid form having consistency of 22% solids and is then used as manure.  The plant further reduces the quantity of bio-solids through an anaerobic treatment process. Here, in the absence of air, anaerobic bacteria digest the bio-solids, producing "biogas", a mixture of methane and carbon dioxide. Methane is the main component of natural gas, and the biogas produced, can be burnt in an engine or turbine to produce power and generate electricity. In this way, anaerobic treatment can generate electrical energy which in turn powers the entire sewage treatment plant. The flexible technical configuration of the plant and the continuous availability of different wastewater and sludge compositions for experiments ensures, even on a small scale, the customization to new research tasks at any time. At last it can be concluded that , the visit was quite enlightening and enriched the knowledge of students and staff alike.