好氧颗粒污泥的培养及其特性研究

摘要

The experimental study of aerobic granular sludge in a sequencing batch reactor ( SBR ) was performed using a synthetic domestic wastewater and ordinary flocculent activated sludge as inoculation sludge. The conditions under which the successful cultivation of aerobic granular sludge is conducted are as follows; the temperature is room temperature, pH is about 7. 0, aeration time is 150 -180 min, sludge settling time is 9 ~ 120 min, and aeration rate is 0. 3 ~0.5 mVh. The aerobic granular sludge has yellow appearance, with a size of 1 ~2 mm, SVI of 40 mL/g or so, and MLSS of 6 515 mg/L. The average settling velocity is up to 18.42 m/h. Aerobic granular sludge contains large amounts of protozoa, e-merging in groups. The removal rates of COD, TN and TP are up to 95% , 96% and 98% respectively.%以西安市第三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生活污水,在SBR反应器中进行好氧颗粒污泥培养实验研究.在温度为室温,pH为7.0左右,曝气时间为150～ 180 min,沉淀时间9～120 min,曝气量为0.3～ 0.5 m3/h的实验条件下,成功培养出了好氧颗粒污泥,其颜色为浅黄色,粒径为1～2mm,SVI为40 mL/g左右,MLSS为6 515 mg/L,平均沉降速度达到18.42 m/h.好氧颗粒污泥中含有大量的原生动物和后生动物,且成群出现,对COD、TN和TP的去除率分别达到95％、96％和98％.