The Defence Research and Development Organisation's new eco-friendly residential complex at Timarpur, Delhi, has the anaerobic biodigestor technology, that aims to conserve nature.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/drdo-inaugurates-eco-friendly-residential-complex-delhi
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-line-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drdo
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/habitat-and-urbanisation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biogas
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/organic-waste
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wastewater-recycling
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toilets
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi