Immobilization of activated sludge in poly(ethylene glycol) by UV technology and its application in micro-polluted wastewater
Immobilization of activated sludge in poly(ethylene glycol) by UV technology and its application in micro-polluted wastewater
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紫外技术固定化聚乙二醇活性污泥及其在微污染废水中的应用
DOI：
10.1016/j.bej.2010.03.007
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发表时间：
2010-06-15
影响因子：
3.9
通讯作者：
Zhang Zhengjia
中科院分区：
文献类型：
--
作者：
Qiao Xiangli;Liu Zhe;Zhang Zhengjia
采用一种新的方法--紫外光(UV)技术，将活性污泥固定在聚乙二醇凝胶载体上。考察了固定化细胞的含水率、吸氧速率、蛋白质含量等特性，并考察了固定化细胞处理不同C/N比、不同pH值微污染废水的间歇培养性能。固定化细胞的生物活性在固定化过程中保持不变，驯化10~15d后细胞表现出较高的硝化活性。氨氮的去除随着C/N比的增加而增加，而TOC的去除则随着C/N比的增加而降低。但在4~6h内，氨氮和总有机碳的降解率均在85%以上和72%以上。PH值在6、7、8、9时对硝化作用无明显影响，但在pH值5时，硝化效率损失30%。扫描电子显微镜照片显示，固定化小球具有高度的多孔性，固定化硝化菌主要分布在凝胶小球的表面和核心内。(C)2010爱思唯尔B.V.保留所有权利。
A new method, ultraviolet (UV) technology, was utilized to immobilize activated sludge in poly(ethylene glycol) (PEG) gel carriers. A number of characteristics of immobilized cells, such as water content, oxygen uptake rate, and protein content, were examined, and performance in batch culture for treating synthetic micro-polluted wastewater with different C/N ratios and different pH values was also investigated. The bioactivity of immobilized cells was maintained during immobilization and the cells showed high nitrification activity after 10-15 d acclimation. Ammonia removal increased with C/N ratio while TOC removal decreased with it. However, more than 85% of the ammonia nitrogen and 72% of the TOC could be reduced in 4-6 h in all cases. No obvious effects on nitrification were seen for pH shocks at pH 6, 7, 8 or 9, but a pH shock at pH 5 caused a 30% loss of nitrification efficiency. SEM images showed that the immobilization beads were highly porous and that immobilized nitrifiers dominated the surface and within the core of the gel beads. (C) 2010 Elsevier B.V. All rights reserved.