【摘要】 采用自行研制的生物转鼓(RDB)反应器处理NO废气,考察了RDB净化NO的反硝化效率.结果表明,在28℃、pH6.5~7.5、转鼓转速0.5r/min、营养液更新2L/d条件下,挂膜历时12d完成.随着转鼓转速的增加,生物膜和液膜表面更新速率提高,传质效率增加,NO反硝化效率提高;当转速>0.5r/min时,液膜增厚过度增加了传质阻力,NO反硝化效率降低.空床停留时间(EBRT)是决定反硝化效率的重要因素,当进气NO处理负荷一定时,随着EBRT由130s下降到26s,NO的净化效率也由99.7%下降至81.5%.更多还原

【Abstract】 Nitric oxide (NO) was treated adopting self-made rotating-drum biofilter (RDB) and the denitrification efficiency of RDB treating NO was studied. Under the conditions of temperature 28℃, pH 6.5 to 7.5, rotating speed 0.5r/min and fresh nutrient solution 2L/d, the biofilm became mature in 12d. Drum-rotating speed decided the surface renewal and liquid film thickness. With the increase of drum-speed, the renewal rate of biofilm and liquid film enhanced, mass transfer efficiency and denitrification efficiency increased. When drum-speed >0.5r/min, liquid film became thicker excessively, which resulted in higher mass transfer resistance and lower denitrification efficiency. Empty bed residence time (EBRT) was a key factor influencing the denitrification efficiency. When inlet loading was constant, NO removal efficiency decreased from 99.7% to 81.5% with EBRT dropping from 130s to 26s.更多还原