Yan J, Hu Y Y
School of Environmental Science and Engineering, South China University of Technology, Guangzhou 510006, People's Republic of China.
Bioresour Technol. 2009 Apr;100(8):2341-7. doi: 10.1016/j.biortech.2008.11.038. Epub 2009 Jan 6.
This study focused on the characteristics of the partial nitrification and degradation of organics with immobilized biomass beads in the treatment of ammonium-rich organic wastewater. Sodium alginate (SA) was selected as the best entrapment support after comparing partial nitrification rate and adsorption efficiency. The immobilization methods were optimized by an orthogonal experiment. Zeta position and BET surface area were used to explain the adsorption behavior of SA immobilized beads. FT-IR revealed that a SA immobilized biomass bead was not a simply physical mixture of SA and biomass. The porous structure of SA immobilized biomass beads were observed by scanning electron microscopy (SEM), which confirmed the porosity of the beads. According to the experimental data, the effects of pH and temperature on partial nitrification and COD removal were evidently weakened in SA immobilized biomass beads due to the "protective" effect of immobilization, whereas the effects of HRT and DO were enhanced.
本研究聚焦于采用固定化生物质颗粒处理高氨有机废水时，部分硝化及有机物降解的特性。在比较部分硝化速率和吸附效率后，选择海藻酸钠（SA）作为最佳包埋载体。通过正交试验对固定化方法进行了优化。利用ζ电位和BET比表面积来解释SA固定化颗粒的吸附行为。傅里叶变换红外光谱（FT-IR）显示，SA固定化生物质颗粒并非SA与生物质的简单物理混合物。通过扫描电子显微镜（SEM）观察了SA固定化生物质颗粒的多孔结构，证实了颗粒的孔隙率。根据实验数据，由于固定化的“保护”作用，SA固定化生物质颗粒中pH和温度对部分硝化及化学需氧量（COD）去除的影响明显减弱，而水力停留时间（HRT）和溶解氧（DO）的影响则增强。
