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APHA

SMWW 2720

Anaerobic Sludge Digester Gas Analysis

2023

5

Standard methods for the examination of water and wastewater 543.3 APHA 24th ed. Ref. (Treatises&monographs FL2)

Gas produced during the anaerobic decomposition of wastes contains methane (CH4) and carbon dioxide (CO2) as the major components with minor quantities of hydrogen (H2), hydrogen sulfide (H2S), nitrogen (N2), and oxygen (O2). It is saturated with water vapor. Common practice is to analyze the gases produced to estimate their fuel value and to check on the treatment process. The relative proportions of CO2, CH4, and N2 are normally of most concern and the easiest to determine because of the relatively high percentages of these gases.