Simultaneous nitrogen and carbon removal from swine digester liquor by the Canon process and denitrification

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• 作者：Zhaoji Zhang^a ; Yuanyuan Li^a ; ^b ; Shaohua Chen^a ; ^{shchen@iue.ac.cn} ; Shumei Wang^a ; Xiaodan Bao^b
• 关键词：Canon process ; Denitrification ; Anammox ; Swine wastewater
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：June, 2012
• 卷：114
• 期：Complete
• 页码：84-89
• 文件大小：375 K

摘要

A laboratory-scale completely autotrophic nitrogen removal over nitrite (Canon) biofilm reactor was applied to remove nitrogen and organic carbon from swine digester liquor for 150 d. A stable nitrogen removal rate was reached after a three-week adaptation period. The nitrogen loading rate of influent were 0.20 卤 0.04, 0.26 卤 0.04, 0.26 卤 0.07 kg N m^鈭? d^鈭? in period I, II and III, respectively. Nitrogen removal rates reached 0.096, 0.133 and 0.104 kg N m^鈭? d^鈭? when the C/N ratios of liquor were maintained at 0.81, 0.65, and 1.24, respectively. The Canon process was better than the denitrification process for nitrogen elimination when the C/N ratio of the influent was controlled below 0.8. PCR-DGGE analysis showed a decrease in microbial diversity of Planctomycetes during long-term operation. In contrast, the aerobic ammonium-oxidizing bacteria species were resistant to the changes due to replacement of synthetic wastewater with swine digester liquor.