In this study, a monitoring campaign on the biofilter used to treat the biogas produced by the landfill located in Venosa (Basilicata, Southern Italy) was carried out to measure CH4 and CO2 concentrations in the gas entering in the biofilter, as well as in the treated air, at different operational conditions (i.e. biogas flow rate and moisture content). Mass balances between the influent and off-gas flow rates allowed us to estimate the CH4 removal efficiency of the biofilter. Moreover, biological analyses on the filter medium were performed to evaluate the influence of ammonia nitrogen and temperature on the methanotrophic growth. The findings show that the CH4 removal efficiency improves when the biogas flow rate decreases, because the lower flow rates minimize possible air contaminations from pipe losses. Regarding the factors influencing microorganisms growth, high incubation temperature cause an inhibition of biological processes, whereas the possible inhibition effect of ammonia depends on the dilution conditions in which the soil sample are prepared.
TOWARDS NEW MANAGEMENT TOOLS FOR THE MONITORING AND MANAGEMENT OF LANDFILL GAS IN SMALL SITES
CANIANI, Donatella;CAIVANO, MARIANNA;Mancini, I. M.;PASCALE, RAFFAELLA;ROMANO, Severino;SOFO, Adriano;SCOPA, Antonio;MASI, Salvatore
2017-01-01
Abstract
In this study, a monitoring campaign on the biofilter used to treat the biogas produced by the landfill located in Venosa (Basilicata, Southern Italy) was carried out to measure CH4 and CO2 concentrations in the gas entering in the biofilter, as well as in the treated air, at different operational conditions (i.e. biogas flow rate and moisture content). Mass balances between the influent and off-gas flow rates allowed us to estimate the CH4 removal efficiency of the biofilter. Moreover, biological analyses on the filter medium were performed to evaluate the influence of ammonia nitrogen and temperature on the methanotrophic growth. The findings show that the CH4 removal efficiency improves when the biogas flow rate decreases, because the lower flow rates minimize possible air contaminations from pipe losses. Regarding the factors influencing microorganisms growth, high incubation temperature cause an inhibition of biological processes, whereas the possible inhibition effect of ammonia depends on the dilution conditions in which the soil sample are prepared.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
