论文部分内容阅读
研究了间歇式膜生物反应器在不同进水碳氮比和有机负荷下对养猪沼液中11种兽用抗生素的去除特性,以及污泥中抗生素的含量变化.结果表明,水力停留时间(HRT)≥5 d、化学需氧量(COD)/总氮(TN)=2.1时,该膜生物反应器对抗生素和COD的去除率均较高,分别达到(79.1±0.7)%和(88.4±1.4)%;当HRT缩短至3 d时,虽然COD去除率不受影响,但抗生素的去除率明显下降;COD/TN从2.1降至0.7后,抗生素去除效率不受影响,但COD去除率明显降低.长污泥龄(SRT)下污泥中出现四环素类和喹诺酮类抗生素的持续积累,积累量随污泥龄的缩短而降低.污泥中的抗生素含量与组成受进水影响较大.
The removal characteristics of eleven veterinary antibiotics in pig biogas slurry and the change of antibiotics content in batch biofilters were studied under different influent C / N ratio and organic loading.The results showed that the hydraulic retention time ( (79.1 ± 0.7)% and (88.4)%, respectively, when the chemical oxygen demand (COD) / total nitrogen (TN) ± 1.4%). When the HRT was shortened to 3 days, the removal rate of antibiotics decreased significantly although the COD removal rate was not affected. The removal efficiency of antibiotics was not affected when the COD / TN decreased from 2.1 to 0.7. However, Significantly decreased.The accumulation of tetracyclines and quinolone antibiotics appeared in the sludge with long sludge age (SRT), and the accumulation decreased with the sludge age shortened.The content and composition of antibiotics in the sludge were greatly influenced by water infiltration .