SBR法培养好氧颗粒污泥的实验研究

Experimental Study of Cultivation of Aerobic Granular Sludge in SBR

以沈阳市某污水处理厂普通絮状活性污泥为接种污泥,采用人工配制的模拟废水,在SBR反应器中进行好氧颗粒污泥培养实验研究。结果表明：通过运行方式的调整及参数的改变,在第33 d培养出成熟的好氧颗粒污泥,污泥粒径在2~3 mm左右;在一次曝气后增加静置缺氧段,有利于脱氮,系统中COD、NH3-N去除率可分别达到93%和92%;好氧颗粒污泥系统中含有大量的原生动物和后生动物,系统中污泥状态良好,处理效果好。采用逐步提高生活污水比例的方法对颗粒污泥进行驯化,当生活污水的比例达到100%时,系统出水COD〈50mg/L,NH3-N〈5 mg/L,达到GB18918—2002一级A出水标准。

In this study, by use of common flocculent activated sludge from a municipal wastewater treatment plant as inoculation sludge and synthetic domestic wastewater, aerobic granular sludge was cultivated in a sequencing batch reactor （SBR）. The results showed that by adjustment of operation mode and change of parameters, mature aerobic granular sludge was successfully cultivated on the thirty-third day, with size of about 2~3 mm. Addition of anoxic stationary phase after one time of aeration was helpful for denitrification and the removal rate of COD and NH -N could reach to 93% and 92% respectively. The aerobic granular3 sludge contained a large amount of protozoa and metazoan, indicating that the performance of sludge and the treatment effect was good. Then, the aerobic granular sludge was acclimated by gradual increasing of the domestic sewage ratio. When the sewage ratio reached to 100%, COD and NH -N in the effluent was less than 50 mg/L and 5 mg/L, meeting the level A effluent limits regulated in3 GB18918-2002.