The city of Bridgeport, Connecticut, employed different technologies to increase both the quality and efficiency of the West Side wastewater treatment plant.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/rehabilitation-wastewater-treatment-aeration-systems
[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/united-states-america-us