CLIMATIC CHARACTERISTICS AND HOURLY VARIATIONS IN BIOGAS CONCENTRATION IN A SANITARY LANDFILL IN NORTHEAST BRAZIL

Francisco Suetônio Mota; Lorena S. Monteiro; Wildson Max B. da Silva; David A. Borges

doi:10.5327/Z2176-94782190077

Authors

Francisco Suetônio Mota Universidade Federal do Ceará https://orcid.org/0000-0001-6061-4539
Lorena S. Monteiro Universidade Federal do Ceará https://orcid.org/0000-0001-9513-1000
Wildson Max B. da Silva Universidade Federal do Ceará https://orcid.org/0000-0002-4494-7605
David A. Borges Universidade Federal do Rio Grande do Norte https://orcid.org/0000-0003-2319-0313

DOI:

https://doi.org/10.5327/Z2176-94782190077

Keywords:

solid wastes; methane emissions; carbon dioxide emissions; nychthemeral analysis; temperature; biogas generation

Abstract

This study determined the hourly variations in the concentration of methane (CH₄), carbon dioxide (CO₂), and oxygen (O₂) during 24-hour periods in a sanitary landfill located in Northeast Brazil, with a predominantly hot tropical mild semi-arid climate. Data were collected over 24 hours in four campaigns in November 2014 and January, March, and April 2015. The measurements were taken in a drain of the sanitary landfill using a portable gas analyzer. We found that, in general, the highest methane concentrations corresponded to the highest biogas temperatures. The maximum concentration of CH₄(59.2%) occurred at a temperature of 36.8ºC, while the minimum concentration of CH₄ (43.2%) was identified at a temperature of 25.4ºC. No relationship was found between CH₄ emissions and rainfall, with temperature being the factor that most influenced the concentration of this gas.