Short-cut nitrification in biological aerated filters with modified zeolite and nitrifying sludge
Short-cut nitrification in biological aerated filters with modified zeolite and nitrifying sludge
复制标题
改性沸石和硝化污泥在曝气生物过滤器中的短程硝化
DOI：
10.1016/j.biortech.2013.02.081
复制
发表时间：
2013-05-01
影响因子：
11.4
通讯作者：
Wang, Shufang
中科院分区：
文献类型：
--
作者：
Li, Qiang;Sun, Shifang;Wang, Shufang
在实验室规模的曝气生物滤池(BAFS)系统中，采用活性污泥进行了自养驯化短程硝化(SCN)和微生物固定。选择沸石作为填料，对其进行改性，使其比表面积增大，去除有毒金属离子。经过30d的驯化和固定化，NH4+-N的去除能力提高到76.51 mg/g干泥(DS)，NH4+-N的转化率最终达到91.2%。生长动力学分析表明，游离氨是影响SCN生长的关键因素。定量聚合酶链式反应测定硝化细菌的丰度变化表明，AOB被成功地富集，NOB被洗去。结果还表明，改性沸石比天然沸石更有利于AOB的特定固定化。用DGGE剖面法研究了驯化过程中AOB群落结构的变化。(C)2013爱思唯尔有限公司。保留所有权利。
Autotrophic domestication for short-cut nitrification (SCN) and microorganism immobilization was carried out in a lab-scale biological aerated filters (BAFs) system with activated sludge. Zeolite was chosen as fillings and modified to enlarge the specific surface and to remove toxic metal ions. After thirty-day domestication and immobilization, the NH4+-N removal capacity increased to 76.51 mg/g dry sludge (DS) and the ratio of NO2--N converted from NH4+-N reached to 91.2% finally. The analysis of growth kinetics indicated that free ammonia should be the key factor for SCN. The abundance variation of nitrifiers, measured by qPCR, showed that AOB was enriched successfully and NOB was washed out. The results also showed that modified zeolite should be more beneficial to the specific immobilization of AOB than natural zeolite. The shift in the community structure of AOB during the domestication by DGGE profile was investigated. (C) 2013 Elsevier Ltd. All rights reserved.