Repair and Rehabilitation of Sewage Treatment Plants

New Delhi : The repair and rehabilitation of civil structures of sewage treatment plants (20 & 40 MGD and 4 digesters of 12 MGD) at Keshopur in Delhi has been taken up with a basic view to ensure that by doing so it is possible to extend the life of the treatment plant infrastructure by at least 25 years. This coupled with a retrofit of the electrical, mechanical, instrumentation, piping and pumping works does help in making these plants operational once again at a much lower costs than would be required for construction of new plants of the same capacity.

There are a large number of such treatment plants in similar state in the country and which are not being used on account of being in a dilapidated condition. A proper survey, followed by estimation, specification and quantification of such works can be done. This further followed by tenders for repair and restoration work will pave the way for reutilization of such infrastructures and assist the cash strapped Municipal Corporations and Local Bodies to effectively utilize their resources in a better way and put in place treatment facilities at much lower and affordable costs.

The primary cause for the deterioration and damage of the structures is exposure to harsh Environmental conditions of rain, sunshine, and the summers and winters which accelerate the process of cracking of structures. Penetration of the moisture into such cracks further leads to corrosion of the reinforcement. The reinforcement expands and spalling of concrete occurs. Poor maintenance of such damaged structures ends up with them being unserviceable at some point of time in the designed service life of the structure.