title: A gas chromatography method established for oxygen transfer efficiency measurement.
abstract: A new method of oxygen transfer efficiency (OTE) measurement for aerobic biochemical wastewater treatment system was introduced. The effluent gas and the influent air around the fan were collected and analyzed with a gas chromatograph. The ratios of the concentration of nitrogen to that of oxygen for both influent and effluent gases were determined. The reduced percentage of the ratio for the influent gases was taken as oxygen transfer efficiency (OTE). The nitrogen gas was used as an inner mark. Using this method, the OTE measurement was not affected by the temperature, water vapor mixture and carbon dioxide produced within the treatment system. The accuracy of the method was analyzed. The standard deviation of the ratios for influent and effluent gases were 0.0006 and 0.0008, respectively. The OTE values of a full-scale aeration tank were detected using this method. The OTE values of the representative spots in the aeration tank varied from 7.3% to 11.5%.
authors.affiliation: School of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China. mujun2003@263.net
authors.forename: Jun
authors.initials: J
authors.lastname: Mu
authors.affiliation: School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
authors.forename: Feijuan
authors.initials: F
authors.lastname: Zhang
authors.affiliation: School of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Xiuhua
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China.
authors.forename: Xuewei
authors.initials: X
authors.lastname: Dong
mesh_terms: D000332:Aerobiosis; D002849:Chromatography, Gas / Q000379:methods*; D008962:Models, Theoretical; D010100:Oxygen / Q000737:chemistry*
chemical_list: D010100:Oxygen