Thermax executed the largest augmentation job in India, by doubling the capacity of existing 68.1 MLD plant to 136.2 MLD at no extra space.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/augmentation-municipal-sewage-treatment-plant
[2] http://admin.indiaenvironmentportal.org.in/category/journal/everything-about-water
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage-treatment-plants-stp
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-sanitation
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india