摘要
为了充分利用污泥厌氧发酵液中的挥发性脂肪酸(VFA),试验研究了p H、发酵温度、发酵天数三个因素对污泥厌氧发酵产生的VFA总量及其组分的影响。采用L9(33)正交实验表,通过VFA总量、乙酸、丙酸含量的综合比较,得到调节初始p H是对污泥厌氧产酸过程影响最大的因素,其次为发酵天数,而发酵温度的影响最小。产酸最优条件组合为调节初始p H=11,发酵温度30℃,发酵3天。在正交试验基础上再次进行不同p H下的单因素试验,确定出使VFA产量及其组分优化的组合为初始p H=10,发酵温度30℃,发酵3天。
引文
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