3种硝化污泥性能的比较研究

Performance of Three Kinds of Nitrification Sludge

采用分批培养试验,对3种污泥的短程硝化性能进行了比较研究。结果表明,与接种硝化污泥相比,长期以含氨无机废水运行后,硝化污泥的氨氧化潜能增强,基质亲和力降低,对亚硝酸的耐受力加大,亚硝酸氧化活性提高,亚硝氮积累率可达(63.58±4.19)%,积累的亚硝酸会因继续氧化成硝酸而减少;长期以含氮有机废水运行后,硝化污泥的氨氧化潜能衰退,基质亲和力增强,对亚硝酸的耐受力减小,亚硝酸氧化活性降低,亚硝氮积累率可达(92.17±2.67)%,积累的亚硝酸不会继续氧化成硝酸而趋稳定;从最大比氨氧化速率与半饱和常数(Rm a/KSa)之比判断,以两种不同基质运行后,硝化污泥中的亚硝酸细菌活性都得到增强。

Batch experiments were carried out to study the performances of three kinds of nitrification sludge of seeding sludge(S1) and nitrification sludge(S2 and S3) taken from a bioreactor run with inorganic or organic ammonia-containing wastewater for a long time.The performances of seeding sludge(S1) were set as control,and the nitrification sludge(S2) showed a higher ammonia oxidation rate,a larger half-saturation constant,a stronger tolerance to nitrite,a higher nitrite oxidation rate and an average nitrite ac...