Passive Reduction of Methane Emissions from a Hog Waste Lagoon Using a Floating Biofilter System Public Deposited

Analytics

Downloadable Content

Download PDF
Request Accessible Version
Last Modified
  • March 20, 2019
Creator
  • Broadwater, Katherine
    • Affiliation: Gillings School of Global Public Health, Department of Environmental Sciences and Engineering
Abstract
  • Roughly 9 million hogs reside in NC in confined animal feeding operations, where waste is stored in anaerobic, open-air lagoons. Methane (CH4) is an important greenhouse gas emitted from lagoons, but there are no regulatory standards. This study evaluates the efficacy of passive biofiltration as a low-cost approach to reducing CH4 emissions from lagoons. Methane emission from a representative lagoon averaged 4.2 g m-2 d-1. Laboratory experiments showed that a community of CH4 oxidizing bacteria initially colonizing a Growstone support medium and subsequently suspended over the lagoon surface was capable of oxidizing 25% of emitted CH4. However, <1% of the emitted CH4 from the lagoon was oxidized by the CH4 oxidizing community after field deployment. Laboratory experiments indicated high NH3 sensitivity of the methanotroph community initially colonizing the Growstones. Ammonia is universally emitted in open-air waste storage lagoons, suggesting that a passive biofilter is not viable for mitigating CH4 emissions.
Date of publication
Keyword
DOI
Resource type
Rights statement
  • In Copyright
Advisor
  • Whalen, Stephen
  • Walters, Glenn
  • Stewart, Jill
Degree
  • Master of Science
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2016
Language
Parents:

This work has no parents.

Items

Thumbnail Title Date Uploaded Visibility Actions
Q237hs527?file=thumbnail Broadwater_unc_0153M_16515.pdf 2019-04-10 Public