The critical role of flocs in nitrification in full-scale aerobic granular sludge-based WWTP.

• Tác giả: Livia Britschgi, Nicolas Derlon, Eberhard Morgenroth, Andreas Proesl, Stephany Wei
• Ngôn ngữ: eng
• Ký hiệu phân loại: 731.45 *Casting
• Thông tin xuất bản: England : Water research , 2025
• Bộ sưu tập: NCBI
• ID: 90398

Tóm tắt

 Aerobic granular sludge (AGS) is usually considered to be a biofilm system consisting of granules only, although practical experience suggests that flocs and granules of various sizes co-exist. This study thus focused on understanding the contribution of flocs and granules of various sizes to nitrification in a full-scale AGS-based wastewater treatment plant (WWTP) operated as a sequencing batch reactor (SBR). The size distribution in terms of total suspended solids (TSS) and the distribution of the nitrifying communities and activities were monitored over 14 months. Our results indicate that AGS is a hybrid system in which flocs (<
 0.25 mm) play a critical role in nitrification. AGS consisted of 36 % flocs and 50 % large granules (>
 2 mm) at a TSS concentration of 4.7 ± 0.7 gTSS L