Removal of ammonia by biofilters: a study with flow-modified system and kinetics.
The characteristics of ammonia removal by two types of biofilter (a standard biofilter with vertical gas flow and a modified biofilter with horizontal gas flow) were investigated. A mixture of organic materials such as compost, bark, and peat was used as the biofilter media based on the small-scale column test for media selection. Complete removal capacity, defined as the maximum inlet load of ammonia that was completely removed, was obtained. The modified biofilter showed complete removal up to 1.0 g N/kg dry material/day. However, the removal capacity of the standard biofilter started to deviate from complete removal around 0.4 g N/kg dry material/day, indicating that the modified biofilter system has higher removal efficiency than the standard upflow one. In kinetic analysis of the biological removal of ammonia in each biofilter system, the maximum removal rate, Vm, was 0.93 g N/kg dry material/day and the saturation constant, Ks, was 32.55 ppm in the standard biofilter. On the other hand, the values of Vm and Ks were 1.66 g N/kg dry material/day and 74.25 ppm, respectively, in the modified biofilter system.
Choi
Jeong Hak
JH
Department of Environmental Engineering, Kyungpook National University, Taegu, Korea.
Kim
Young Hun
YH
Joo
Duk Jong
DJ
Choi
Sang June
SJ
Ha
Tae Wook
TW
Lee
Dal Hoon
DH
Park
In Ho
IH
Jeong
Yun Seok
YS
D000392:Air Movements; D000397:Air Pollution / Q000517:prevention & control*; D000641:Ammonia / Q000302:isolation & purification* / Q000378:metabolism; D019149:Bioreactors; D005374:Filtration; D007700:Kinetics; D009812:Odorants; D009930:Organic Chemicals
D009930:Organic Chemicals; D000641:Ammonia