Enhanced aerobic nitrifying granulation by static magnetic field.
Enhanced aerobic nitrifying granulation by static magnetic field.
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DOI：
10.1016/j.biortech.2012.01.108
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发表时间：
2012-04
影响因子：
11.4
通讯作者：
Xin-Hua Wang;Mu-He Diao;Ying Yang;Yijing Shi;Mingming Gao;Shu-Guang Wang
中科院分区：
文献类型：
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作者：
Xin-Hua Wang;Mu-He Diao;Ying Yang;Yijing Shi;Mingming Gao;Shu-Guang Wang
好氧硝化颗粒处理高强度氨废水的主要挑战之一是活性污泥转化为好氧颗粒所需的造粒时间长。本研究提供了一种通过施加强度为48.0mT的静磁场来增强好氧硝化造粒的新策略。元素分析表明，外加磁场能促进污泥中铁化合物的积累。铁的聚集通过增强颗粒的凝结特性和刺激细胞外聚合物质（EPS）的分泌，将完全造粒时间从41天缩短到25天。长期、循环实验和荧光原位杂交（FISH）分析证明，48.0mT的磁场强度可以增强亚硝酸盐氧化菌（NOB）的活性和生长。上述结果表明，磁场对好氧硝化制粒有一定的促进作用。
One of the main challenging issues for aerobic nitrifying granules in treating high strength ammonia wastewater is the long granulation time required for activated sludge to transform into aerobic granules. The present study provides a novel strategy for enhancing aerobic nitrifying granulation by applying an intensity of 48.0mT static magnetic field. The element analysis showed that the applied magnetic field could promote the accumulation of iron compounds in the sludge. And then the aggregation of iron decreased the full granulation time from 41 to 25days by enhancing the setting properties of granules and stimulating the secretion of extracellular polymeric substances (EPS). Long-term, cycle experiments and fluorescence in-situ hybridization (FISH) analysis proved that an intensity of 48.0mT magnetic field could enhance the activities and growth of nitrite-oxidizing bacteria (NOB). These findings suggest that magnetic field is helpful and reliable for accelerating the aerobic nitrifying granulation.