We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Greenhouse Gas Emissions from Septic Systems in New York State.
- Authors
Truhlar, Allison M.; Rahm, Brian G.; Brooks, Rachael A.; Nadeau, Sarah A.; Makarsky, Erin T.; Walter, M. Todd
- Abstract
Onsite septic systems use microbial processes to eliminate organic wastes and nutrients such as nitrogen; these processes can contribute to air pollution through the release of greenhouse gases (GHGs). Current USEPA estimates for septic system GHG emissions are based on one study conducted in north-central California and are limited to methane; therefore, the contribution of these systems to the overall GHG emission budget is unclear. This study quantified and compared septic system GHG emissions from the soil over leach fields and the roof vent, which are the most likely locations for gas emissions during normal septic system operation. At each of eight septic systems, we measured fluxes of CH4, CO2, and N2O using a static chamber method. The roof vent released the majority of septic system gas emissions. In addition, the leach field was a significant source of N2O fluxes. Comparisons between leach field and vent emissions suggest that biological processes in the leach field soil may influence the type and quantity of gas released. Overall, our results suggest that (i) revisions are needed in USEPA guidance (e.g., septic systems are not currently listed as a source of N2O emissions) and (ii) similar studies representing a wider range of climatic and geographic settings are needed. The total vent, sand filter, and leach field GHG emissions were 0.17, 0.045, and 0.050 t CO2- equivalents capita-1 yr-1, respectively. In total, this represents about 1.5% of the annual carbon footprint of an individual living in the United States.
- Subjects
PHYSIOLOGICAL effects of greenhouse gases; EMISSIONS (Air pollution); NITROGEN &; the environment; SEPTIC tanks; WASTE management; ORGANIC wastes; ECOLOGICAL impact
- Publication
Journal of Environmental Quality, 2016, Vol 45, Issue 4, p1153
- ISSN
0047-2425
- Publication type
Article
- DOI
10.2134/jeq2015.09.0478