Towards Enhancement of Water Sovereignty by Implementing the ‘Constructed Wetland for Reuse’ Technology in Gated Community Rahul S. Sutar, B. Lekshmi, Dilip R. Ranade, Yogen J. Parikh, and Shyam R. Asolekar Abstract The eco-centric wastewater treatment technology entitled ‘CW4Reuse’ (Constructed Wetland for Reuse) for treatment of domestic wastewaters employing horizontal subsurface-flow constructed wetland (CW) beds has been developed and demonstrated in India. A case study of treatment of wastewater using CW is presented in this paper based on our current research and demonstration of the developed technology. The CW4Reuse technology has been demonstrated in the Town of Katel, District of Buldhana, State of Maharashtra, India. The CW4Reuse technology has evidently shown the high treatment efficiency for the wastewater treatment in Katel. It is hoped that the CW4Reuse technology will potentially play a significant role to strengthen the country’s agricultural economy on one hand and will also improve the rural and peri-urban sanitation on the other hand. Additionally, it will enhance the ‘ecosystem restoration and rejuvenation’ of urban as well as rural waterfronts in India. Moreover, the CW4Reuse technology is utilizing the skills of rural people—which will ultimately fortify the inclusive growth of the community. Keywords Constructed wetland · Wastewater treatment · Water reuse 1 Introduction In India, by and large, the discharge of large volumes of untreated or partially treated sewages into lakes, rivers, ponds, creeks and on the coast has led to their contamina- tion. Additionally, there exists a huge difference between the generation and treatment of wastewaters. Hence, there is a huge potential for the application of natural treat- ment systems, in particular, constructed wetlands (CWs) in the developing economies such as Asia or Africa in general and India in particular due to their innate strength [1]. For the treatment of sewages and sullages from communities all over the Country, intensive efforts have been made by the Government of India during the past two R. S. Sutar · B. Lekshmi · D. R. Ranade · Y. J. Parikh · S. R. Asolekar (B) Environmental Science and Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai, India e-mail: asolekar@gmail.com © Springer Nature Switzerland AG 2021 K. R. Reddy et al. (eds.), Sustainable Environment and Infrastructure, Lecture Notes in Civil Engineering 90, https://doi.org/10.1007/978-3-030-51354-2_15 157