Wagner, Brett

Brett Wagner is a civil engineer at AECOM in the Columbus, Ohio office. He received his Bachelor of Science degree in Civil Engineering with an Environmental Emphasis at the University of Kansas in 2016, and he recently finished his PhD in Environmental Engineering at the University of Michigan in 2022. At AECOM, he works on biological nutrient removal, resource recovery, and water reuse in water and wastewater systems.

Titles from this speaker

Quantification of Carbon Emissions in Potable Reuse Treatment Configurations

Abstract

Potable reuse commonly employs reverse osmosis (RO). However, RO has high energy requirements and generates a brine waste, making it better suited for coastal locations that allow for oceanic brine discharge. Carbon-based advanced treatment (CBAT) offers a more favorable option for inland regions, with lower capital costs, energy requirements, and no brine waste. This study quantified carbon emissions over a 50-year operational period for three configurations: RO with oceanic brine discharge, RO with zero-liquid discharge (ZLD) brine handling, and CBAT. Results showed that RO and pumping energy accounted for over 80% of Scope 2 emissions in RO trains, and ZLD brine treatment increased emissions by 60%. Alternatively, CBAT had 3x lower Scope 2 emissions, but Scope 3 emissions could be substantial depending on the type and replacement frequency of the granular activated carbon. By understanding carbon emissions, decision-makers can balance meeting potable reuse requirements while minimizing the carbon impact

Potable reuse provides numerous benefits and is being considered by utilities around the world, but the implementation of potable reuse requires significant infrastructure and power which may result in increased carbon emissions. Understanding the carbon emissions for reverse osmosis and carbon-based potable reuse treatment configurations is crucial in achieving the best balance between water sustainability and climate change adaptation.

SpeakerWagner, Brett

Presentation time

09:30:00

10:00:00

Session time

08:30:00

10:00:00

SessionWater Reuse: Challenges and Opportunities

Session locationRoom S403b - Level 4

TopicPotable Reuse, Water Reuse and Reclamation

Author(s)

Wagner, Brett