Tompkins, DavidDavidTompkinsBumbac, CostelCostelBumbac2021-06-292021-06-292019-12http://hdl.handle.net/123456789/1743IWA Water and Development Congress & Exhibition 2019, Sri Lanka, workshopenDecentralized or centralized wastewater treatment in Asia’s megacities – understanding regulatory and social barriersconference object