Banca de DEFESA: RIADNY PATRICIA DE SOUZA FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : RIADNY PATRICIA DE SOUZA FERREIRA
DATE: 24/02/2022
TIME: 15:30
LOCAL: Auditório Pós-Graduação em Engenharia Civil on line
TITLE:

Effect of Cracks on Greenhouse Gas Emissions in Fandfill Cover Layers

KEY WORDS:

cracks; cover layer; sanitary landfill; greenhouse gas emissions

PAGES: 60
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

The emission of greenhouse gases, according to Abrelpe (2020), continues to be the agenda of international meetings and, in this sense, the Brazilian waste sector emits around 96 million tons of CO 2 eq annually. In a sanitary landfill, the packaging of the residue and the performance of the covering layer are essential to guarantee safety and mitigation of environmental impacts. The choice of clayey soils causes, in the long term, due to the cycles of wetting and drying, cracks in the layer. Due to cracking, the emission of greenhouse gases (GHG) and the infiltrationof liquids can be increased,increasing the volume of leachate produced by the landfilled waste. Thus, work was carried out to understand and quantify, through numerical analysis, the effect of cracks on greenhouse gas emissions in sanitary landfill cover layers. A numerical study of the percolation of gases in the covering layer was then carried out under three conditions: no crack, crack up to half of the layer and crack up to the end of the layer. For this, the SEEP/W program was used to simulate the flows, in transient, ascending and descending regimes, respectively, of gas and precipitation. The assessment included the quantification of gases emitted during one year by means of the proposed flow of methane. There was a progressive geometric increase of 103 between greenhouse gas emissions with increasing crack depth for the proposed conditions. In addition, the superiority of cracked soil permeability in decreasing the weighted soil permeability was proved.

BANKING MEMBERS:
Presidente - 2130650 - JOSE FERNANDO THOME JUCA
Interno - 1413233 - LEONARDO JOSE DO NASCIMENTO GUIMARAES
Externa à Instituição - RÉGIA LÚCIA LOPES - IFRN