Ammonia odor removal using biofiltration process

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ประพัทธ์ พงษ์เกียรติกุล1

Abstract

This study focuses on determination of maximum loading in a continuous biofilter system to eliminate ammonia gas under a steady state. Contaminated air with ammonia gas was injected into the system, containing Nitrifying Bacteria attached on 1.5-L ceramic rings as a medium(surface area=1.2 m2/g and total pore volume = 0.0029 mL/g). The experiment was conducted at inlet ammonia concentrations   of 50 ppm, 100 ppm, 200 ppm, 300 ppm, 400 ppm and 500 ppm. The results show that the average efficiency of the system at 50-ppm inlet concentration was 83.1%. The overall efficiency remained high even the inlet concentrations were increased to 100 ppm 200 ppm 300 ppm and 400 ppm (efficiency = 90.4%, 85.8%, 66.3% and 49.8% respectively). Highest mass loading rate of 16.7 g NH3/m3×h (inlet concentration = 400 ppm) was determined and maximum elimination capacity was found as of 8.3 g NH3/m3×h. However, the removal efficiency was reduced to 31.1 % after the inlet concentration was reached at 500 ppm. This is because the condition enhanced a growth rate of Nitrosomonas Bacteria in the system to be higher than the rate of Nitrobacter Bacteria. Accumulation of nitrite in a system inhibited growth of Nitrobacter Bacteria and finally resulted to efficiency reduction.

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How to Cite
1.
พงษ์เกียรติกุล1 ป. Ammonia odor removal using biofiltration process. featkku [internet]. 2015 Jan. 1 [cited 2025 Apr. 11];1(1):9-14. available from: https://ph02.tci-thaijo.org/index.php/featkku/article/view/175987
Section
Research Articles

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