MBBR填料改性及其处理氨氮废水性能研究

Study on Modification of MBBR Biofilm Carriers and Its Performance in Ammonia Sewage Treatment

随着城市工业化进程的加快,污水排放量逐年增加。其中,含氮废水的处理是一个我们迫切需要关注的问题。本试验以聚氨酯海绵为基体,提出了一种沸石粉填充聚氨酯海绵的新型生物膜载体(MS1),并将其运用于序批式生物膜反应器(MS1-SBBR)中处理氨氮废水,以期在污水处理中获得更佳效果。结果表明,改性后的生物膜载体在废水脱氮除磷方面具有良好的优异性,MS1-SBBR对NH4+-N和总磷(TP)的平均去除率比填充未改性载体的生物膜反应器(S1-SBBR)高了4%和8.9%。在微生物固定化方面,新型生物膜载体呈现出更高的微生物粘附性,运行10天后,MS1上负载微生物较未改性生物膜载体(S1)高80.3%。同时对微生物群落进行分析,发现变形菌(Proteobacteria)、拟杆菌(Bacteroidetes)以及放线菌(Actinobacteria)为其主要功能菌属,在污水处理中起重要作用。

With the acceleration of urban industrialization, sewage discharge increases year by year. Among them, the treatment of nitrogenous wastewater is a problem that we need to pay attention to urgently. In this study, a novel zeolite-filled polyurethane sponge biofilm carrier (MS1) was proposed to treat ammonia wastewater in a sequencing batch biofilm reactor (MS1-SBBR), in order to obtain better effect in wastewater treatment. The results showed that the modified biofilm carrier has a good performance in wastewater nitrogen and phosphorus removal, and the average removal rates of NH4+-N and total phosphorus (TP) by MS1-SBBR were 4% and 8.9% higher than those of the unmodified biofilm reactor (S1-SBBR). In terms of microbial immobilization, the new biofilm carrier showed higher microbial adhesion, and after 10 days of operation, the microbial load on MS1 was 80.3% higher than that of the unmodified biofilm carrier (S1). At the same time, the analysis of the microbial community found that Proteobacteria, Bacteroidetes and Actinobacteria were the main functional bacteria, which played an important role in sewage treatment.