Effects of step-feed on granulation processes and nitrogen removal performances of partial nitrifying granules

被引：30
作者：
Wang, Xin-Hua [1 ]
Jiang, Li-Xiu [1 ]
Shi, Yi-Jing [1 ]
Gao, Ming-Ming [1 ]
Yang, Sen [1 ]
Wang, Shu-Guang [1 ]
机构：
[1] Shandong Univ, Sch Environm Sci & Engn, Shandong Prov Key Lab Water Pollut Control & Reso, Jinan 250100, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 123卷
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
Aerobic granules; Partial nitrification; Step-feed; Granulation processes; Denitrification; SEQUENCING BATCH REACTOR; AEROBIC GRANULES; WASTE-WATER; PARTIAL NITRIFICATION; NITRITE PATHWAY; SLUDGE; AMMONIA; SBR; DENITRIFICATION; TECHNOLOGY;
D O I：
10.1016/j.biortech.2012.07.080
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Two anoxic/oxic sequencing batch reactors (A/O SBRs) were operated to investigate the effects of step-feed on granulation processes and performances of partial nitrifying granules (PNG). R1 was operated in a traditional single-feed mode, while a two-step-feed strategy was used in R2. Results showed that R1 had a faster granulation process and better performance in maintaining partial nitrification compared with R2, indicating that the step-feed mode had a negative effect of on formation of PNG. However, after full granulation, PNG in both reactors had similar properties in terms of suspended solids (MLSS), sludge volume index (SVI) and granule size. Moreover, mature granules in R2 had a higher nitrite accumulation rate than that in R1. Step-feed strategy was also observed to enhance denitrification and TN removal, as well as ammonia oxidation. It can be concluded that step-feed was unfavorable for cultivating PNG, but it significantly improved the nitrogen removal performance of PNG. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：375 / 381
页数：7
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