Life Cycle Assessment of Community-Based Sewer Mining : Integrated Heat Recovery and Fit-For-Purpose Water Reuse

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Cabling , L P B , Kobayashi , Y , Davies , E G R , Ashbolt , N J & Liu , Y 2020 , ' Life Cycle Assessment of Community-Based Sewer Mining : Integrated Heat Recovery and Fit-For-Purpose Water Reuse ' , Environments , vol. 7 , no. 5 , 36 . https://doi.org/10.3390/environments7050036

Title: Life Cycle Assessment of Community-Based Sewer Mining : Integrated Heat Recovery and Fit-For-Purpose Water Reuse
Author: Cabling, Ludwig Paul B.; Kobayashi, Yumi; Davies, Evan G. R.; Ashbolt, Nicholas J.; Liu, Yang
Contributor: University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
Date: 2020-05
Language: eng
Number of pages: 15
Belongs to series: Environments
ISSN: 2076-3298
URI: http://hdl.handle.net/10138/317689
Abstract: Municipal sewage contains significant embedded resources in the form of chemical and thermal energy. Recent developments in sustainable technology have pushed for the integration of resource recovery from household wastewater to achieve net zero energy consumption and carbon-neutral communities. Sewage heat recovery and fit-for-purpose water reuse are options to optimize the resource recovery potential of municipal wastewater. This study presents a comparative life cycle assessment (LCA) focused on global warming potential (GWP), eutrophication potential (EUP), and human health carcinogenic potential (HHCP) of an integrated sewage heat recovery and water reuse system for a hypothetical community of 30,000 people. Conventional space and water heating components generally demonstrated the highest GWP contribution between the different system components evaluated. Sewage-heat-recovery-based district heating offered better environmental performance overall. Lower impact contributions were demonstrated by scenarios with a membrane bioreactor (MBR) and chlorination prior to water reuse applications compared to scenarios that use more traditional water and wastewater treatment technologies and discharge. The LCA findings show that integrating MBR wastewater treatment and water reuse into a district heating schema could provide additional environmental savings at a community scale.
Subject: life cycle assessment
heat recovery
membrane bioreactor
water reuse
community-based wastewater treatment
ANAEROBIC MEMBRANE BIOREACTOR
NUTRIENT RECOVERY
ENERGY EFFICIENCY
BIOGAS PRODUCTION
WASTE
SYSTEMS
RECLAMATION
BLACKWATER
GREYWATER
MANAGEMENT
1172 Environmental sciences
218 Environmental engineering
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