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pH值对污泥发酵产酸的影响

Keywords: 剩余污泥,厌氧产酸,挥发性脂肪酸,pH值调节

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Abstract:

利用剩余污泥厌氧发酵产生挥发性脂肪酸,可作为污水脱氮除磷的有机碳源,而pH值是发酵产酸过程中重要的控制参数。研究了不同pH值条件下剩余污泥厌氧发酵产酸过程中各参数变化规律,探索pH值对其过程的影响及其分析。结果表明,碱性条件有利于污泥发酵产酸过程,实验最佳条件是控制反应初始pH值为10.0,仅8d发酵挥发性脂肪酸浓度就达到8.90mmol/L。此外,污泥在发酵过程中,酸性条件下NH4+-N和PO43--P的释放量均大于碱性条件。

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