Accelerated aerobic granulation using alternating feed loadings: Alginate-like exopolysaccharides

作者：Yang Ya Chun; Liu Xiang; Wan Chunli; Sun Supu; Lee Duu Jong^*

来源：Bioresource Technology, 2014, 171: 360-366.

DOI：10.1016/j.biortech.2014.08.092

• Alternating loading
• Granulation
• Alginate-like exopolysaccharides
• c-di-GMP

Alginate-like exopolysaccharides (ALE) likely contribute markedly to strength of aerobic granules. This study cultivated aerobic granules from propionate wastewaters using strategies with different organic loading rates (OLRs) (4.4-17.4 kg/m(3)-d). When the OLR increased suddenly, the constituent cells (Pseudomonas, Clostridium, Thauera and Arthrobacter) were stimulated to secret extracellular cyclic diguanylate (c-di-GMP) and produced excess ALE, which formed a large quantity of sticky materials that served as the precursor of aerobic granules. Formation of excess ALE was the prerequisite for accelerated granulation. Conversely, this study observed no enrichment of poly guluronic acid blocks in ALE during granulation.

• 出版日期2014-11
• 单位复旦大学