种泥预处理方式对Anammox启动的影响

Influence of Seed Sludge Pretreatment Methods on the Start-up of Anammox Process

对普通活性污泥进行硝化和反硝化预处理后富集Anammox菌。结果表明,硝化和反硝化预处理方式富集Anammox菌均耗时102 d。FISH技术分析表明,两者富集的微生物中均含Anammox菌。系统启动后（153~161 d）,硝化和反硝化预处理方式的总氮平均负荷分别达到0.437 g/（g VSS·d）和0.309 g/（g VSS·d）,总氮平均去除率分别达到71.4%和34.3%。可见对同一活性污泥进行硝化和反硝化预处理均可成功启动厌氧氨氧化过程,但硝化预处理更有利于厌氧氨氧化菌的富集。

Anammox bacteria were enriched from conventional activated sludges by nitrification and denitrification pretreatment. The results show that Anammox bacteria have been enriched from both the nitrified sludge and denitrified sludge after 102 days. Fluorescence in situ hybridization analysis（FISH） showed that the Anammox bacteria were exactly in the enriched sludge. The average total nitrogen（TN） loading rates of the Anammox systems from the nitrified sludge and denitrified sludge reached 0.437 g/（g VSS·d） and 0.309 g/（g VSS·d）, respectively, during the period of 153~161 day, with the corresponding average TN removal rates up to 71.4% and 34.3%, respectively. The Anammox process can be start-up successfully from nitrified sludge and also denitrified sludge, but nitrification is more efficient pretreatment of seed sludge to enrich anammox bacteria.