Barapullah and Supplementary drains were to be cleaned by the method, no formal proposal yet.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/enzyme-treatment-proposed-two-major-drains-city
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-jal-board-djb
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drainage
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/intach
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sewage
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-treatment-technology