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厌氧-好氧颗粒污泥SBR处理城市污水的中试研究

Keywords: SBR,好氧颗粒污泥,中试,城市污水

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Abstract:

采用中试规模的厌氧-好氧交替式颗粒污泥SBR处理实际城市污水,研究了好氧颗粒污泥的培养过程、处理效果及颗粒污泥的特性。以絮状活性污泥为接种污泥,经过72d的培养后,反应器内出现小粒径颗粒污泥。在随后的230d运行实验中,通过调整曝气阶段的溶解氧浓度、排水体积交换率以及周期运行方式,使得反应器中颗粒污泥粒径和比例逐渐增加。在最佳工况运行条件下,反应器中污泥浓度为3000~4000mg/L,SVI值为45~55mL/g,对COD、氨氮、总氮和总磷的平均去除率分别为91.63%、74.02%、68.42%和96.41%,达到了同时脱氮除磷的效果。

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