Reducing non-residential asset sanitisation water footprint for improved public health in water-deficient cities

Date

2021-08-15

Advisors

Journal Title

Journal ISSN

ISSN

2210-6707

Volume Title

Publisher

Elsevier

Type

Article

Peer reviewed

Yes

Abstract

This paper evaluates the potential for reconfiguring city-scale clean water demand by reducing the non-residential asset sanitsation water footprint. A novel methodological framework is proposed for assessing the feasibility of a mix of three surface sanitisation measures (Manual surface wiping, Mechanical cleaning/Rapid disinfectant spraying, Ultraviolet germicidal irradiation-UVGI treatment) in terms of a Sanitisation waterfootprint index (SWI); three typical application scenarios are considered – high risk-high frequency, moderate risk-moderate frequency, moderate risk-low frequency. The UVGI treatment outperforms the other two surface treatment methods, particularly in high risk-high frequency scenario in the healthcare setting, with SWI as low as 2%. Further, case-study evidence from a ward-level spatial analysis using real-world data estimates SWI ranging between 0-30% in those wards with greater commercial/public assets, showing clear merit of this framework in re-configuring city-scale public health sanitisation water footprint. A cost-benefit analysis (involving resources – staffing, water and chemicals; capital expenditure, and energy costs) shows superior performance of UVGI treatment over the other two methods from the second year onwards, surpassing the initial cost-effectiveness for corresponding manual or mechanical cleaning. Wider implementation of this framework can foster strategic transformation of city-scale water footprint, which is deemed essential for ensuring sustainable growth of water deficient cities globally.

Description

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.

Keywords

freshwater, Public health, sanitisation, water footprint, UVGI

Citation

Tiwary, A., Bhattacharyya, S., and Matouq, M. (2021) Reducing non-residential asset sanitisation water footprint for improved public health in water-deficient cities. Sustainable Cities and Society, 75, 103268.

Rights

Research Institute

Institute of Energy and Sustainable Development (IESD)