Partial nitrification to nitrite for treating ammonium-rich organic wastewater by immobilized biomass system.
Partial nitrification to nitrite for treating ammonium-rich organic wastewater by immobilized biomass system.
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DOI：
10.1016/j.biortech.2008.11.038
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发表时间：
2009-04
影响因子：
11.4
通讯作者：
Jia Yan;Yongyou Hu
中科院分区：
文献类型：
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作者：
Jia Yan;Yongyou Hu
研究了固定化菌球在处理高氨氮有机废水中的部分硝化降解特性。通过比较部分硝化速率和吸附效率，选择海藻酸钠(SA)作为最佳包埋载体。通过正交实验对固定化方法进行了优化。用Zeta位置和BET比表面积解释了SA固定化小球的吸附行为。FT-IR表明SA固定化的生物量小球并不是SA和生物量的简单物理混合物。用扫描电子显微镜(SEM)观察了SA固定化生物质小球的多孔结构，证实了小球的孔隙率。实验数据表明，SA固定化生物质小球由于具有固定化的“保护性”作用，pH和温度对部分硝化和COD去除的影响明显减弱，而HRT和DO的影响增强。
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.