Effect of supplementary carbon addition in the treatment of low C/N high-technology industrial wastewater by MBR

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• 作者：Mathava Kumar^a ; ^{mathav@nitc.ac.in} ; ^{mathavakumar@gmail.com} ; Pei-Yun Lee^b ; Toshikazu Fukusihma^c ; Liang-Ming Whang^c ; ^d ; ^e ; ^{whang@mail.ncku.edu.tw} ; Jih-Gaw Lin^b ; ^{jglin@mail.nctu.edu.tw}
• 关键词：Membrane bioreactor ; Supplementary carbon ; Wastewater treatment ; Denitrification ; C/N ratio
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：June, 2012
• 卷：113
• 期：Complete
• 页码：148-153
• 文件大小：528 K

摘要

The effect of supplementary carbon addition for the treatment of high-technology industrial wastewater in a membrane bioreactor (MBR) was investigated. The MBR was operated for 302 days under different C/N ratios, i.e. 0.9-1 to 20 days, 1.6-21 to 42 days, 2.9-43 to 82 days, 3.6-83 to 141 days, 4.8-165 to 233 days and 9.3-240 to 302 days. Irrespective of the C/N ratios investigated, SS and BOD₅ removal efficiencies were above 95%and above 80%COD removal efficiency was observed. In addition, complete nitrification was observed throughout the investigation. However, denitrification and total nitrogen removal efficiencies reached their maximum values at the highest C/N ratio (9.3) investigated. Real-time PCR analysis revealed 10 times higher ammonia oxidizing bacteria to total bacteria ratio under the highest C/N ratio condition (9.3) compared to the low C/N ratio condition (1.6).