Extract

The building system boundary includes building water cycle and natural water cycle out of which building water cycle has larger environmental impacts due to ever increasing demand for fresh water and treatment or disposal of it’s huge amount of waste water. Water once used is called wastewater and managing water using conventional linear processes has higher environmental impacts due to resource depletion and creating vulnerability to pollution of other virgin resources. Looking at the land use and densities in city of Mumbai and suburbs; domestic sector seeks highest attention towards urge for drinking water and disposal of waste water. Net zero water accomplishment can be achieved by creating opportunities for increasing water efficiency by creating closed loop within the system by studying dependent components of buildings water cycle. Decentralized waste water treatment technologies have generated a ray of hope in terms of onsite treatment of waste water. Study aimed at evaluation of most popularly used existing Decentralized Wastewater Treatment Plants for treating large volume of domestic sewage of Mumbai; to find out a sustainable solution. Sustainability assessment was done by using Matrix Decision Support Tool in order to derive a conceptual model to help decision makers to select appropriate treatment system for achieving Net positive water management on site.

Keywords: Domestic sewage; Decentralized waste water treatment systems; Sewage water treatment;
Sustainability Indicators; Net Zero, etc

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