School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
School of Resources and Environment, University of Jinan, Jinan 250022, PR China.
Bioresour Technol. 2017 Sep;240:171-176. doi: 10.1016/j.biortech.2017.02.115. Epub 2017 Feb 28.
In present study, two column-type sequencing batch reactors with alternative anoxic/aerobic phases were operated and compared under partial nitrification and full nitrification modes by controlling different dissolved oxygen (DO) conditions. During steady state, the characterizations of extracellular polymeric substances (EPS) from two reactors were qualitatively and quantitatively analyzed through chemical and spectroscopic approaches. Data implied that partial nitrification reactor had relatively higher total nitrogen (TN) removal efficiency and loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) contents. According to excitation emission matrix (EEM) spectra, LB-EPS and TB-EPS from two kinds of reactors expressed similar fluorescence peak locations but different intensities. Fluorescence regional integration (FRI) further suggested that Region IV was the main fraction in both types of EPS fractions. Moreover, TB-EPS exhibited a greater number of molecular weight fractions than those of LB-EPS. Both EPS fractions had similar functional groups, which represented the complex nature of EPS compositions.
在本研究中，通过控制不同的溶解氧（DO）条件，运行了两个采用交替缺氧/好氧相的柱式序批式反应器，并对其进行了部分硝化和完全硝化模式的比较。在稳定状态下，通过化学和光谱方法对两个反应器的胞外聚合物（EPS）进行定性和定量分析。数据表明，部分硝化反应器具有相对较高的总氮（TN）去除效率和松散结合 EPS（LB-EPS）和紧密结合 EPS（TB-EPS）含量。根据激发发射矩阵（EEM）光谱，两种反应器的 LB-EPS 和 TB-EPS 表现出相似的荧光峰位置，但强度不同。荧光区域积分（FRI）进一步表明，在两种 EPS 中，区域 IV 是主要的组成部分。此外，TB-EPS 表现出比 LB-EPS 更多的分子量分数。这两种 EPS 都具有相似的官能团，这代表了 EPS 组成的复杂性质。
