Preliminary qualitative and quantitative assessment of gases from biodigestion of solid wastes in the landfill of Londrina,Paraná State, Brazil

Jorge Luiz Audibert,Fernando Fernandes

doi:10.4025/actascitechnol.v35i1.11453

Jorge Luiz Audibert, Fernando Fernandes

Open Access

https://doi.org/10.4025/actascitechnol.v35i1.11453

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Abstract

Trials conducted in controlled landfillsor dumps are still incipient in Brazil. This paper aimed to qualify and quantify the emission of biogas in the landfill of Londrina, Parana State. Measurements were performed by three types of tests: static closed chamber for the characterization and quantification of gas leakage by the surface layer, inspection tubes for pressure quantification and qualification of the biogas produced below the surface layer and, finally, measurements in vertical drains to quantify and qualify the biogas. Results for the flow rates of methane gas in the vertical drains ranged from 0 to 190.2 N m 3 h -1 , depending on the shape of the drain and to the age of solid waste deposition. The tests with static closed chamberhad results between 1.3 and 30.6 NL h -1 m 2 , influenced by changes in the age of solid waste deposition, different thicknesses of the surface layer, and excessive rainfall during the tests. With the data of methane gas flow obtained by thestatic closed chambertests and by the biogas drains, it was preliminary quantified the total emission of methane in the landfill of Londrina, Parana State.

Highlights

Controlled landfills and dumps are the most used alternatives in Brazil for the final disposal of domestic solid wastes
With the results obtained in the tests, we developed a methodology to evaluate the emissions of gases in the landfill of Londrina, Paraná State, aiming to evaluate preliminarily the annual emissions of methane
The unit of measure used to quantify the volume of gas in constructing the graph is Normal Liter (NL), resulting in a surface percolation in NL h-1 m2

Summary

Introduction

Controlled landfills and dumps are the most used alternatives in Brazil for the final disposal of domestic solid wastes. These alternatives have a good cost-benefit relationship for the municipalities, but result in environmental setback with two potentially polluting components: leachate and biogas. Technology materials and inert waste (FRÉSCA et al, 2008). Diverse factors influence these parameters, including the social class of the populations, regional economy, public policy for collecting recyclable, landfill management, etc. The physical characterization of the solid wastes directly influences the quantification and qualification of the biogas produced in the controlled landfill or dump, making the studies peculiar to each region

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