使用一种快速启动SBAR反应器培养好氧颗粒污泥,在此基础上研究污泥颗粒化过程与解体过程中好氧颗粒污泥的特性、反应器对污染物的去除效果以及三种胞外聚合物(EPS)关键组分含量的变化对颗粒污泥稳定性的影响.结果表明:(1)在低水力负荷条件下,通过缩短沉淀时间、改变进水基质浓度等措施,反应器在92 d时完全形成淡黄色、小粒径、不规则形状的颗粒污泥;同时完全颗粒化后,SVI保持在50 mL/g以下,MLSS保持在4.0 g/L以上.(2)在144 d的运行时间内,反应器对COD的去除率均在91.18％以上,出水COD浓度均在50 mg/L以下;而TP的处理效果波动较大,去处率在49.25％～99.22％;除启动过程外,反应器对NH4+-N的去除效果达到80％以上.(3)颗粒污泥中溶解型EPS(S-EPS)、松散结合型EPS(LB-EPS)的含量较少且变化不明显,而紧密结合型EPS(TB-EPS)中的蛋白质(PN)在颗粒污泥的形成与解体过程中变化明显,当维持在35～40 mg/g MLSS时,颗粒污泥可以保持稳定.%By cultivating aerobic granular sludge in a quick start-up SBAR reactor,research on the characteristics of aerobic granular sludge in the process of sludge granulation and disintegration,removal efficiencies of the pollutant by the reactor,as well as influence of the key component changes of three EPS on the stability of the sludge,was introduced.The results showed that:(1) Under low hydraulic condition,particles of light yellow,small size and irregular shape were completely formed in 92 days by changing the conditions,such as shortening the sedimentation time and changing the matrix concentration of influent.In addition,after complete granulation,the SVI was under 50 mL/g,while the MLSS remained above 4.0 g/L.(2) An average COD removal efficiency of above 91.18％ was achieved within the 144-day running time,with the effluent concentrations of COD under 50 mg/L.The removal efficiencies of TP had a great fluctuation,ranging from 49.25％ to 99.22％.For NH4+-N,the removal efficiencies were above 80％ after the start-up.(3) The contents of soluble EPS (S-EPS) and loosely-bound EPS (LB-EPS) in the granular sludge were lower and changed unremarkably,while the change of protein (PN) in the tightly-bound EPS (TB-EPS) was significant in the sludge formation and dissolution.Meanwhile,when the PN remained between 35 to 40 mg/g MLSS,the granular sludge could maintain its stability.
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