不同价态铁处理腈纶废水过程中菌群结构分析

利用不同反应器条件（SBBR、Fe （0）-SBBR、Fe （Ⅱ）-SBBR、Fe （Ⅲ）-SBBR）对腈纶废水进行处理，探究不同价态铁对腈纶废水处理过程及此过程中微生物群落结构变化.结果表明，Fe （0）/Fe （Ⅱ）/Fe （Ⅲ）-SBBR对腈纶废水有良好的处理效果，特别是NH₄⁺-N，去除率均在90%以上；整个运行周期内Fe （0）-SBBR处理效果最好.利用Illumina MiSeq高通量测序技术分析处理过程中微生物群落结构，结果表明，Fe （0）/Fe （Ⅱ）/Fe （Ⅲ）-SBBR优势菌在属水平上差异显著，Fe （0）-SBBR主要以Gemmata、Planctomyces、Aridibacter、Fluviicola等属为主；Fe （Ⅱ）-SBBR主要以Thermomonas、Aridibacter、Bacillus、Paracoccus等属为主；Fe （Ⅲ）-SBBR主要以Planctomyces、Bacillus、Nostocoida、Aridibacter等属为主；与对照组SBBR相比，Fe （0）-SBBR对其处于相对劣势的菌有很好的刺激生长作用；Fe （0）和Fe （Ⅲ）对微生物群落的改变大于Fe （Ⅱ）.

Analysis of microbial community structure in acrylic fiber wastewater treated by different valence forms of iron

Different reactors (SBBR, Fe(0)-SBBR, Fe(Ⅱ)-SBBR, Fe(Ⅲ)-SBBR) were employed in this paper to investigate the treating processes of acrylic fiber wastewater by different valence forms of iron as well as the variation of microbial communities during these processes. The results showed that acrylic fiber wastewater was well treated by Fe(0)/Fe(Ⅱ)/Fe(Ⅲ)-SBBR, especially the removal rate of NH₄⁺-N was above 90%. And, the Fe(0)-SBBR worked best throughout the entire operating cycle. Illumina MiSeq high throughput sequencing was also utilized to analyze the structure of microbial communities during the processes. It was found that the dominant bacteria were significantly different at the genus level between Fe(0)/Fe(Ⅱ)/Fe(Ⅲ)-SBBR systems. Gemmata、Planctomyces、Aridibacter、Fluviicola were the dominant genera in Fe(0)-SBBR. Thermomonas、Aridibacter、Bacillus、Paracoccus were the dominant genera in Fe(Ⅱ)-SBBR. Planctomyces、Bacillus、Nostocoida、Aridibacter were the dominant genera in Fe(Ⅲ)-SBBR. Compared with control group SBBR, Fe (0)-SBBR could strongly stimulate the growth of bacteria which were at a relative disadvantage. Moreover, the change of microbial community by Fe (0) and Fe (Ⅲ) were greater than that by Fe (Ⅱ).