N₂O Reduction Using Goat and Cow Manure-Based Compost as Biofilter Medium

Abstract:

Nitrous oxide (N₂O) is the fourth most prevalent greenhouse gas in the atmosphere after carbon dioxide (CO₂), methane (CH₄), and water vapor. This gas contributes most significantly to global warming since it decomposes with great difficulty in the atmosphere, even in low concentrations. Emissions of N₂O gas are known to have an impact 310 times greater than the impact of CO₂ on global warming. According to the Intergovernmental Panel on Climate Change, N₂O concentration in the atmosphere has increased by 46 ppb (17%) since 1750, and continues to increase. A biofilter works by draining the contaminated air flow through a porous medium in which contaminants in the air flow are adsorbed by biofilms; these contaminants are then oxidized to produce biomass, CO₂, H₂O, nitrate (NO₃^-), and sulfate (SO₄^2-). In addition, the biofilter supports the growth of microorganisms present in the porous medium. This research was conducted to investigate the performance of two types of a compost-based filter medium in 9 hours N₂O biofiltration, with N₂O flow rate variations and variations in water content levels of the filter medium. A biofiltration experiment was conducted to evaluate the effects of selected parameters on N₂O removal efficiency. The results showed that goat manure-based compost was more effective in reducing N₂O compared with cow manure-based compost, with the highest efficiency of 70.1%.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 5075-5085
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.5075
• Online since: May 2012
• Authors: Heri Hermansyah, Surya Utami Tania, Mohammad Nasikin
• Keywords: Biofilter, Compost, Elimination Capacity, Nitrous Oxide, Removal Efficiency

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