Seasonal variation in heat fluxes, predicted emissions of malodorants, and wastewater quality of an anaerobic swine waste lagoon

John H. Loughrin, Arturo I. Quintanar, Kim L. Cook, Nanh C. Lovanh, Rezaul Mahmood, Evi Becerra-Acosta

Research output: Contribution to journalArticlepeer-review

Abstract

The concentrations of p-cresol above a wastewater lagoon were modeled from February through June based on equations developed in a previous study. Using this model, in which p-cresol concentrations were calculated based on lagoon evaporation and net available radiation at the lagoon surface, predicted p-cresol concentrations were highest during the months of March and April and declined to very low levels thereafter. This was in accordance with observed emission patterns in the previous study. In the same period during which predicted emissions increased, wastewater concentrations of malodorants decreased. While other indicators of wastewater quality such as ammonium and chemical oxygen demand (COD) also decreased in concentration, the magnitude of their improvement was not as high as for the malodorants. There were no pronounced differences in bacterial populations between the cool and warm seasons based on molecular quantification of genes targeting total cells, Bacteroides, Clostridia, and methanogens. While the improvement in the concentrations of wastewater malodorants may be due to catabolism by lagoon bacteria, our findings indicate that evaporative losses that occurred as the lagoon warmed may also play a strong role.

Original languageEnglish (US)
Pages (from-to)3611-3618
Number of pages8
JournalWater, Air, and Soil Pollution
Volume223
Issue number7
DOIs
StatePublished - Sep 2012
Externally publishedYes

Keywords

  • Emissions
  • Evaporation
  • Heat flux
  • Lagoon
  • Malodor
  • p-Cresol
  • Wastewater

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Ecological Modeling
  • Water Science and Technology
  • Pollution

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