A novel CSTR-type of hollow fiber membrane biofilm reactor for consecutive nitrification and denitrification

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• 作者：Jeong-Hoon Shin ; Byoung-In Sang ; Yun-Chul Chung ; Youn-kyoo Choung
• 关键词：CSTR-type of HF-MBfR ; Nitrification ; Hydrogenotrophic denitrification
• 刊名：Desalination
• 出版年：2008
• 期刊代码：24_00119164
• 类别：ce
• 出版时间：1 March 2008
• 卷：221
• 期：1-3
• 页码：526-533
• 文件大小：392 K

摘要

A continuous stirred tank reactor (CSTR) type of hollow fiber membrane biofilm reactor (HF-MBfR) using composite membranes was investigated for the nitrogen removal in synthetic wastewater. The CSTR-type of HF-MBfR process couples autotrophic biological nitrogen removal reactors with the bubbleless mass transfer of oxygen and hydrogen through hollow fiber membranes. For nitrification, CSTR-type of HF-MBfR was operated over 400 days and for hydrogenotrophic denitrification, CSTR-type of HF-MBfR was operated over 300 days. The maximum steady-state NH₄⁺-N removal rate achieved was 0.25 kg N/m³ day (2.06 g N/m² day) and the denitrification rate achieved was 0.22 kg N/m³ day (1.72 g N/m² day). Consequently, in the HF-MBfRs, biofilms were formed stably on surface of membranes, and nitrification and hydrogenotrophic denitrification were performed successfully during long-term operation.