1 results listed
Air stripping process for removal of ammonia is a
commonly used process for the pretreatment of wastewater. In this
study, removal and absorption of ammonia from coke wastewater by
an air stripping reactor was investigated. Air stripping of ammonia
from wastewater was performed a water-spraying aero-column
reactor. Scaling and fouling on the packing surface in paced towers
are not two major problem in this process. During the experiments,
ammonia was stripped with air in a semi-batch system and absorbed
in sulphuric acid solution. Effects of various operating parameters
such as initial pH, stripping time, air flow and liquid flow on ammonia
removal with air stripping process were examined. The mass transfer
coefficient for air stripping process was calculated for different
operation condition. Increment in the mass transfer coefficient was
observed with increasing pH level and air flow rate. The highest value
of mass transfer coefficient was 0.452 h-1
, obtained at initial pH 12, air
flow 12 L/min and liquid flow 2.5 mL/min. In these condition, removal
efficiency of ammonia (at 10 h stripping time) was obtained as 100%.
Approximately 92-95% of ammonia in the absorption unit was
recovered as ammonia sulphate
International Iron & Steel Symposium
UDCS
Fuat Ozyonar
Bunyamin Karagozoglu
Mehmet Kobya