Cavanaugh, Shannon

Shannon is an environmental engineer with Brown and Caldwell based in Seattle. She is focused on wastewater treatment and has experience in process engineering, biosolids, and greenhouse gas accounting. She received her MS in Civil and Environmental Engineering from the University of Washington and BS in Environmental Science from UCLA.

Titles from this speaker

Description: N2O Emissions from a Full-Scale Membrane Bioreactor Treatment Plant using Aqueous...

N2O Emissions from a Full-Scale Membrane Bioreactor Treatment Plant using Aqueous and Gaseous Monitoring Techniques

Abstract

This study quantifies N2O emissions from a membrane bioreactor (MBR) Water Reclamation Facility (WRF) and compares continuous, on-line aqueous and gaseous monitoring techniques. This methodology offers detailed N2O emissions data with
- continuous measurement,
- a long period of data collection, and
- a study location at a plant with covered basins and an off-gas control system. It is of interest to determine if each measurement method yields similar data, since liquid analyzers are more practical for most plants to install. Thus, this study may serve as encouragement to utilize aqueous analyzers without offsetting precision.

N2O from a full-scale MBR treatment plant in Washington state was measured on-line for 5.5 months using gas-phase and liquid-phase analyzers. Methodologies from the different analyzers were compared and the plant’s average emission factor and annual emission estimate were determined. Factors influencing N2O emissions were investigated with correlation analysis using the plant’s operational data.

SpeakerCavanaugh, Shannon

Presentation time

11:15:00

11:30:00

Session time

11:00:00

12:00:00

SessionN2O Emissions from Water Resource Recovery Facilities

Session number415

TopicFacility Operations and Maintenance, Municipal Wastewater Treatment Design, Nutrients, Sustainability and Climate Change

Author(s)

Shannon Cavanaugh

Author(s)S. Cavanaugh1; E.J. Jacobson2; P. Sukapanpotharam2; M. Winkler1;

Author affiliation(s)University of Washington, Department of Civil & Environmental Engineering, Seattle, WA1King County Department of Natural Resources and ParksWastewater Treatment Division, Seattle, WA2

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2021

DOI10.2175/193864718825158125

Volume / Issue

Content sourceWEFTEC

Word count16

Reclaimed Water for Data Center Direct Evaporative Cooling Systems

Abstract

Data centers have significant cooling water demands which are conventionally met using potable water. When available, use of reclaimed water can alleviate stress on freshwater sources. Since most data centers use direct evaporative cooling (DEC) systems, challenges associated with the use of reclaimed water need to be addressed. This paper explores strategies to utilize reclaimed water in data center DEC systems, relieving water stress from ecosystems and communities while (1) mitigating potential risks, (2) utilizing innovative and efficient pre-treatment systems for effective implementation, and (3) assessing relevant regulatory pathways. Case studies of utilities that provide reclaimed water to data centers for use in DEC, and case studies of existing reclaimed water facilities that could partner with data centers to implement these systems are also provided.

Data center equipment generates heat that is most often cooled by direct evaporative cooling (DEC). This consumes water that can heavily impact local water supplies. In locations where reclaimed water is available, its use should be encouraged and prioritized to conserve potable water resources. This paper discusses the challenges and opportunities associated with the use of reclaimed water in DEC systems that may be preventing widespread implementation.

SpeakerCavanaugh, Shannon

Presentation time

13:30:00

13:50:00

Session time

13:30:00

15:00:00

SessionThe Future of Datacenters: From Water Users to Water Stewards

Session locationRoom S501d - Level 5

TopicIntermediate Level, Sustainability and Climate Change, Water Reuse and Reclamation

Author(s)

Cavanaugh, Shannon

Author(s)S. Cavanaugh 1; C. De Las Casas 2 ; R. Maco 1; A. Parker 3; S. Cavanaugh 1;

Author affiliation(s)Brown and Caldwell 1; Brown and Caldwell 2 ; Brown and Caldwell 1; Brown and Caldwell, Walnut Creek, CA 3; Brown and Caldwell, Walnut Creek, CA 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159111

Volume / Issue

Content sourceWEFTEC

Word count10