Enhanced denitrification of sewage via bio-microcapsules embedding heterotrophic nitrification-aerobic denitrification bacteria Acinetobacter pittii SY9 and corn cob

被引：18
|
作者：
Shi, Yunqi [1 ,2 ]
Hu, Yongyou [1 ,2 ,4 ]
Liang, Donghui [1 ,2 ]
Wang, Guobin [3 ]
Xie, Jieyun [3 ]
Zhu, Xiaoqiang [3 ]
机构：
[1] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Environm & Energy, Guangzhou 510006, Peoples R China
[2] South China Univ Technol, Guangzhou Higher Educ Mega Ctr, Key Lab Pollut Control & Ecosyst Restorat Ind Clus, Minist Educ, Guangzhou 510006, Peoples R China
[3] Guangzhou Pengkai Environm Technol Co Ltd, Guangzhou 511493, Peoples R China
[4] South China Univ Technol, Coll Environm & Energy, Guangzhou 510006, Guangdong, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2022年 / 358卷
关键词：
Heterotrophic nitrification-aerobic denitrification (HN-AD); Bio-microcapsules; Corn cob; Slow-release; Embedding; WASTE-WATER; DENITRIFYING BACTERIUM; AMMONIUM REMOVAL; CARBON SOURCE; NITROGEN; NITRITE; NITRATE;
D O I：
10.1016/j.biortech.2022.127260
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this work, bio-microcapsules were prepared by embedding heterotrophic nitrification and aerobic denitrification (HN-AD) bacteria (Acinetobacter Pittii SY9) and corn cob. Bio-microcapsules (20 g/L of corn cob and 30% v/v suspension of strain SY9) were porous (pore size 2579.74-3725.44 nm; porosity 53.6%-79.9%). Under the appropriate conditions (C/N > 2, temperature of 20-35 C, rotation speed of 100-120 rpm, pH of 7-9), TN removal efficiency of bio-microcapsules reached 94.4%, and 74.0% of nitrogen was converted into N-2. The results of kinetics fitting indicated that aerobic denitrification was the limiting step during HN-AD process. Bio-microcapsules could slow the carbon release of corn cob for 120 days, which ensuring high HN-AD performance even at low C/N of 2.8. Bio-microcapsule SBR could stably run for 88 days with TN removal efficiency > 90% for synthetic sewage. Bio-microcapsules embedding strain SY9 and corn cob have prospective applications for enhancing denitrification of sewage.
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页数：8
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