投加聚氨酯泡沫微生物固定化载体的SBBR脱氮除磷实验研究

Study of adding polyurethane foam as micro-organisms immobilized carriers in sequencing batch biofilm reactor to remove nitrogen and phosphorus

研究投加聚氨酯泡沫微生物固定化载体的SBBR脱氮除磷效果及机理。在SBR中填充聚氨酯泡沫微生物固定化载体,形成序批式生物膜反应器(SBBR)。SBBR以实际生活污水为处理对象,在A/O运行工况下对微生物进行培养驯化,并在SBBR运行稳定时研究其脱氮除磷效果。研究结果表明,SBBR中的聚氨酯泡沫微生物固定化载体在空间上形成了好氧/缺氧/厌氧微环境;SBBR不仅对有机物有较好的处理效果,而且获得较好的同时硝化反硝化(SND)效果,COD、NH4+-N、TN和TP的平均去除率分别达到84.23%、96.94%、68.63%和91.38%。投加聚氨酯泡沫微生物固定化载体的SB-BR对生活污水具有理想的处理效果,处理后出水除TP外均达到达到了国家《城镇污水处理厂污染物排放标准》(GB18918-2002)一级A标准,TP接近一级A标准。

The effect of nitrogen and phosphorus removal in SBBR filled with polyurethane foam and its mechanism were studied in this experiment.Polyurethane foam which is used as micro-organisms immobilized carriers was put into SBR,to form a sequencing batch biofilm reactor（SBBR）.The micro-organisms were cultivated under the A/O operation mode,and then the nitrogen and phosphorus removal of domestic sewage in SBBR was studied under stable operation.The results show that the carrier which was used in the SBBR,created aerobic-anoxic-anaerobic micro-environment in space,removed the organic well and also appeared a good phenomenon of simultaneous nitrification and denitrification（SND）.The average removal rates of COD,NH＋4-N,TN,TP were 84.23%,96.94%,68.63% and 91.38%,respectively.The SBBR filled with polyurethane carriers could achieve a successful goal in the domestic sewage treatment.The quality of the effluent meets the Grade ⅠA requirements of discharge standard of pollutants for municipal wastewater treatment plant（GB18918-2002）except TP which is close to it.