射流微泡曝气器溶氧性能测试与工程应用

射流微泡曝气器是一种基于新型微泡生成机理的曝气设备,具有广泛的工程应用价值。射流微泡曝气器溶氧性能测试分析的结果表明:当新设计的射流微泡曝气器进气量从0.2m3/h增至2.0m3/h时,其氧总转移系数从0.052L/min增加到0.338L/min,理论动力效率从0.659kg/kW·h增加到4.284kg/kW·h。与其他类型曝气器相比,该型射流微泡曝气器的氧总转移系数和理论动力效率均有显著提高。此外,射流微泡曝气器应用于实际工程中,废水出水水质中化学需氧量的平均去除率可达到76.6%。

Experimental Analysis and Application of Oxygen Transfer Performance of Micro-bubble Jet Aerator

The micro-bubble jet aerator is a novel aerator based on the new mechanism of micro-bubble, which has the extensive applications in the waste-water treatment.The performance of the new aerator is analyzed by the experimental measurement. Results show that the standard oxygen transfer coefficients (K Las) increase from 0.052 L/min to 0.338 L/min, and the theoretical power efficiency (EP) increases from 0.659 kg/kW?h to 4.284 kg/kW?h, when the aerator airflow rate increases from 0.2 m3/h to 2.0 m3/h. Compared with other type aerators, both KLas and EP are improved obviously in the present aerator. Furthermore, the micro-bubble jet aerator is also applied to a real waste-water treatment, and it is verified that there is a high COD Cr removal rate of 76.6% in the effluent water.